二进制安装部署k8s集群V1.15
二进制安装部署k8s v1.15
一、集群架构图解
二、部署前准备
2.1、准备虚拟机
5台CentOS7虚拟机：
| 主机名 | 角色 | ip | 配置 | 部署服务 |
|---|---|---|---|---|
| szdc-11.host.com | k8s代理节点1 | 10.0.0.11 | 4C8G | bind9,nginx(四层代理),keeplived,supervisor |
| szdc-12.host.com | k8s代理节点2 | 10.0.0.12 | 4C8G | etcd,nginx(四层代理),keeplived,supervisor |
| szdc-21.host.com | k8s运算节点1 | 10.0.0.21 | 4C8G | etcd,kube-apiserver,kube-controller-manager,kube-scheduler,kube-kubelet,kube-proxy,supervisor |
| szdc-22.host.com | k8s运算节点2 | 10.0.0.22 | 4C8G | etcd,kube-apiserver,kube-controller-manager,kube-scheduler,kube-kubelet,kube-proxy,supervisor |
| szdc-200.host.com | 运维节点(docker仓库） | 10.0.0.200 | 4C8G | 证书服务，docker私有仓库harbor，nginx代理harbor，pause |
# 系统版本
[root@szdc0-11 ~]# uname -r
3.10.0-693.el7.x86_64
[root@szdc0-11 ~]# uname -a
Linux szdc0-11.host.com 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
2.2、系统优化
# 1、设置主机名
hostnamectl set-hostname <hostname>
# 2、关闭selinux和防火墙
setenforce 0 && sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
systemctl stop firewalld && systemctl disable firewalld
# 3、安装epel源
yum install -y epel-release
# 4、安装必要工具
yum install wget net-tools telnet tree nmap sysstat lrzsz dos2unix bind-utils -y
2.3、部署DNS服务
2.3.1、安装bind服务
# 在szdc-11.host.com主机上操作
[root@szdc0-11 ~]# yum install bind -y
2.3.2、配置bind
1）主配置文件
# 1、修改主配置文件
[root@szdc0-11 ~]# vim /etc/named.conf
....
listen-on port 53 { 10.0.0.11; };
allow-query { any; };
forwarders { 10.0.0.254; }; # 向上递归查询，填写网关地址(增加一条)
dnssec-enable no;
dnssec-validation no;
...
# 2、检查配置文件
[root@szdc0-11 ~]# named-checkconf
2）添加区域配置文件
# 末尾添加
[root@szdc0-11 ~]# vim /etc/named.rfc1912.zones
zone "host.com" IN {
type master;
file "host.com.zone";
allow-update { 10.0.0.11; };
};
zone "od.com" IN {
type master;
file "od.com.zone";
allow-update { 10.0.0.11; };
};
3）配置区域数据文件
# 1、配置主机与数据文件
$ORIGIN host.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.host.com. dnsadmin.host.com. (
2021042301 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS dns.host.com.
$TTL 60 ; 1 minute
dns A 10.0.0.11
szdc0-11 A 10.0.0.11
szdc0-12 A 10.0.0.12
szdc0-21 A 10.0.0.21
szdc0-22 A 10.0.0.22
szdc0-200 A 10.0.0.200
# 2、业务域数据文件
[root@szdc0-11 ~]# vim /var/named/od.com.zone
$ORIGIN od.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.od.com. dnsadmin.od.com. (
2021042301 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS dns.od.com.
$TTL 60 ; 1 minute
dns A 10.0.0.11
2.3.3、启动bind
[root@szdc0-11 ~]# named-checkconf
[root@szdc0-11 ~]# systemctl start named
[root@szdc0-11 ~]# systemctl enable named
[root@szdc0-11 ~]# netstat -lntp|grep named
tcp 0 0 10.0.0.11:53 0.0.0.0:* LISTEN 15241/named
tcp 0 0 127.0.0.1:953 0.0.0.0:* LISTEN 15241/named
tcp6 0 0 ::1:953 :::* LISTEN 15241/named
2.3.4、域名解析检查
[root@szdc0-11 ~]# dig -t A szdc0-11.host.com @10.0.0.11 +short
10.0.0.11
[root@szdc0-11 ~]# dig -t A szdc0-12.host.com @10.0.0.11 +short
10.0.0.12
[root@szdc0-11 ~]# dig -t A szdc0-21.host.com @10.0.0.11 +short
10.0.0.21
[root@szdc0-11 ~]# dig -t A szdc0-22.host.com @10.0.0.11 +short
10.0.0.22
[root@szdc0-11 ~]# dig -t A szdc0-200.host.com @10.0.0.11 +short
10.0.0.200
[root@szdc0-11 ~]# dig -t A dns.host.com @10.0.0.11 +short
10.0.0.11
[root@szdc0-11 ~]# dig -t A dns.od.com @10.0.0.11 +short
10.0.0.11
2.3.5、DNS客户端配置
1）Linux主机配置
# 1、修改eth0的DNS指向(所有节点都要修改)
[root@szdc0-11 ~]# sed -ri 's#^DNS.*#DNS1=10.0.0.11#g' /etc/sysconfig/network-scripts/ifcfg-eth0
# 2、重启网卡
[root@szdc0-11 ~]# systemctl restart network
# 3、查看/etc/resolv.conf
[root@szdc0-11 ~]# vim /etc/resolv.conf
# Generated by NetworkManager
search host.com # 如果没有这行添加即可
nameserver 10.0.0.11
2）windows主机配置
网络和共享中心 -> 网卡设置 -> 设置DNS服务器
如有必要，还应设置虚拟网卡的接口地跃点数为：10
2.3.6、检查
Linux主机上：
[root@szdc0-200 ~]# ping szdc0-200
PING szdc0-200.host.com (10.0.0.200) 56(84) bytes of data.
64 bytes from szdc0-200.host.com (10.0.0.200): icmp_seq=1 ttl=64 time=0.010 ms
64 bytes from szdc0-200.host.com (10.0.0.200): icmp_seq=2 ttl=64 time=0.036 ms
[root@szdc0-200 ~]# ping szdc0-200.host.com
PING szdc0-200.host.com (10.0.0.200) 56(84) bytes of data.
64 bytes from szdc0-200.host.com (10.0.0.200): icmp_seq=1 ttl=64 time=0.013 ms
64 bytes from szdc0-200.host.com (10.0.0.200): icmp_seq=2 ttl=64 time=0.050 ms
windows主机上：
C:\Windows\System32>ping szdc0-200.host.com
正在 Ping szdc0-200.host.com [10.0.0.200] 具有 32 字节的数据:
来自 10.0.0.200 的回复: 字节=32 时间<1ms TTL=64
来自 10.0.0.200 的回复: 字节=32 时间<1ms TTL=64
来自 10.0.0.200 的回复: 字节=32 时间<1ms TTL=64
C:\Windows\System32>ping dns.host.com
正在 Ping dns.host.com [10.0.0.11] 具有 32 字节的数据:
来自 10.0.0.11 的回复: 字节=32 时间<1ms TTL=64
来自 10.0.0.11 的回复: 字节=32 时间<1ms TTL=64
C:\Windows\System32>ping dns.od.com
正在 Ping dns.od.com [10.0.0.11] 具有 32 字节的数据:
来自 10.0.0.11 的回复: 字节=32 时间<1ms TTL=64
来自 10.0.0.11 的回复: 字节=32 时间<1ms TTL=64
2.4、准备自签证书
在运维主机上操作：
2.4.1、安装cfssl
[root@szdc0-200 ~]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O /usr/bin/cfssl
[root@szdc0-200 ~]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O /usr/bin/cfssl-json
[root@szdc0-200 ~]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/bin/cfssl-certinfo
[root@szdc0-200 ~]# chmod +x /usr/bin/cfssl*
2.4.2、创建CA证书请求文件
[root@szdc0-200 src]# mkdir /opt/certs
[root@szdc0-200 src]# vim /opt/certs/ca-csr.json
{
"CN": "OldboyEdu",
"hosts": [
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
],
"ca": {
"expiry": "175200h"
}
}
证书请求文件说明：
- CN: Common Name，浏览器使用该字段验证网站是否合法，一般写的是域名。非常重要。
- C：Country，国家
- ST：State，州，省
- L：Locality，城区，城市
- O：Organization Name，组织名称，公司名称
- OU：Organization Unit Name。组织单位名称，公司部门
2.4.3、生成CA证书和私钥
[root@szdc0-200 ~]# cd /opt/certs/
[root@szdc0-200 certs]# ll
total 4
-rw-r--r-- 1 root root 328 Apr 23 16:55 ca-csr.json
[root@szdc0-200 certs]# cfssl gencert -initca ca-csr.json | cfssl-json -bare ca
2021/04/23 17:00:49 [INFO] generating a new CA key and certificate from CSR
2021/04/23 17:00:49 [INFO] generate received request
2021/04/23 17:00:49 [INFO] received CSR
2021/04/23 17:00:49 [INFO] generating key: rsa-2048
2021/04/23 17:00:50 [INFO] encoded CSR
2021/04/23 17:00:50 [INFO] signed certificate with serial number 96593049137918906768333297514641004790385976570
[root@szdc0-200 certs]# ll
total 16
-rw-r--r-- 1 root root 993 Apr 23 17:00 ca.csr
-rw-r--r-- 1 root root 328 Apr 23 16:55 ca-csr.json
-rw------- 1 root root 1679 Apr 23 17:00 ca-key.pem
-rw-r--r-- 1 root root 1346 Apr 23 17:00 ca.pem
2.5、部署docker环境
需要部署的主机：szdc0-21，szdc0-22，szdc0-200
2.5.1、安装docker
参考脚本：https://github.com/docker/docker-install/blob/master/install.sh
[root@szdc0-21 ~]# curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
[root@szdc0-22 ~]# curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
[root@szdc0-200 ~]# curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
2.5.2、配置docker
# szdc0-21
[root@szdc0-21 ~]# mkdir /etc/docker
[root@szdc0-21 ~]# vim /etc/docker/daemon.json
{
"graph": "/data/docker",
"storage-driver": "overlay2",
"insecure-registries": ["registry.access.redhat.com","quay.io","harbor.od.com"],
"registry-mirrors": ["https://q2gr04ke.mirror.aliyuncs.com"],
"bip": "172.6.21.1/24",
"exec-opts": ["native.cgroupdriver=systemd"],
"live-restore": true
}
[root@szdc0-21 ~]# systemctl start docker &&systemctl enable docker
[root@szdc0-21 ~]# docker version
# szdc0-22
[root@szdc0-22 ~]# mkdir /etc/docker
[root@szdc0-22 ~]# vim /etc/docker/daemon.json
{
"graph": "/data/docker",
"storage-driver": "overlay2",
"insecure-registries": ["registry.access.redhat.com","quay.io","harbor.od.com"],
"registry-mirrors": ["https://q2gr04ke.mirror.aliyuncs.com"],
"bip": "172.6.22.1/24",
"exec-opts": ["native.cgroupdriver=systemd"],
"live-restore": true
}
[root@szdc0-22 ~]# systemctl start docker &&systemctl enable docker
[root@szdc0-22 ~]# docker version
# szdc0-200
[root@szdc0-200 ~]# mkdir /etc/docker
[root@szdc0-200 ~]# vim /etc/docker/daemon.json
{
"graph": "/data/docker",
"storage-driver": "overlay2",
"insecure-registries": ["registry.access.redhat.com","quay.io","harbor.od.com"],
"registry-mirrors": ["https://q2gr04ke.mirror.aliyuncs.com"],
"bip": "172.6.200.1/24",
"exec-opts": ["native.cgroupdriver=systemd"],
"live-restore": true
}
[root@szdc0-200 ~]# systemctl start docker &&systemctl enable docker
[root@szdc0-200 ~]# docker version
2.6、部署Harbor
2.6.1、下载软件包解压
github地址：https://github.com/goharbor/harbor/releases
[root@szdc0-200 ~]# mkdir -p /opt/src/harbor
[root@szdc0-200 ~]# cd /opt/src/harbor
[root@szdc0-200 harbor]# wget https://storage.googleapis.com/harbor-releases/release-1.8.0/harbor-offline-installer-v1.8.3.tgz
[root@szdc0-200 harbor]# tar xvf harbor-offline-installer-v1.8.3.tgz -C /opt
[root@szdc0-200 harbor]# mv /opt/harbor /opt/harbor-v1.8.3
[root@szdc0-200 harbor]# ln -s /opt/harbor-v1.8.3 /opt/harbor
2.6.2、配置harbor
[root@szdc0-200 harbor]# vim /opt/harbor/harbor.yml
hostname: harbor.od.com
http:
port: 180
harbor_admin_password: Harbor12345
data_volume: /data/harbor
log:
level: info
rotate_count: 50
rotate_size: 200M
location: /data/harbor/logs
[root@szdc0-200 harbor]# mkdir -p /data/harbor/logs
2.6.3、安装docker-compose
[root@szdc0-200 harbor]# yum install docker-compose -y
[root@szdc0-200 harbor]# rpm -qa docker-compose
docker-compose-1.18.0-4.el7.noarch
2.6.4、安装harbor
[root@szdc0-200 harbor]# ll
total 569632
-rw-r--r-- 1 root root 583269670 Sep 16 2019 harbor.v1.8.3.tar.gz
-rw-r--r-- 1 root root 4526 Apr 23 17:22 harbor.yml
-rwxr-xr-x 1 root root 5088 Sep 16 2019 install.sh
-rw-r--r-- 1 root root 11347 Sep 16 2019 LICENSE
-rwxr-xr-x 1 root root 1654 Sep 16 2019 prepare
[root@szdc0-200 harbor]# sh -x install.sh
[root@szdc0-200 harbor]# docker-compose ps
Name Command State Ports
-----------------------------------------------------------------------------------------------
harbor-core /harbor/start.sh Up
harbor-db /entrypoint.sh postgres Up 5432/tcp
harbor-jobservice /harbor/start.sh Up
harbor-log /bin/sh -c /usr/local/bin/ ... Up 127.0.0.1:1514->10514/tcp
harbor-portal nginx -g daemon off; Up 80/tcp
nginx nginx -g daemon off; Up 0.0.0.0:180->80/tcp,:::180->80/tcp
redis docker-entrypoint.sh redis ... Up 6379/tcp
registry /entrypoint.sh /etc/regist ... Up 5000/tcp
registryctl /harbor/start.sh Up
2.6.5、配置harbor的dns内网解析
# 1、编辑od.com业务域，注意前滚一个序号
[root@szdc0-11 ~]# vim /var/named/od.com.zone
harbor A 10.0.0.200
# 2、重启named
[root@szdc0-11 ~]# systemctl restart named
# 3、测试域名解析
[root@szdc0-11 ~]# dig -t A harbor.od.com +short
10.0.0.100
2.6.6、安装nginx代理harbor
[root@szdc0-200 ~]# yum install nginx -y
[root@szdc0-200 ~]# rpm -qa nginx
nginx-1.16.1-3.el7.x86_64
[root@szdc0-200 ~]# vim /etc/nginx/conf.d/harbor.od.com.conf
server {
listen 80;
server_name harbor.od.com;
client_max_body_size 1000m;
location / {
proxy_pass http://127.0.0.1:180;
}
}
[root@szdc0-200 ~]# nginx -t
[root@szdc0-200 ~]# systemctl start nginx && systemctl enable nginx
2.6.7、浏览器测试
账号密码：admin/Harbor12345
2.6.8、测试harbor使用
1）harbor创建public仓库，访问级别为公开
2）拉取镜像并推送
[root@szdc0-200 ~]# docker pull nginx:1.7.9
[root@szdc0-200 ~]# docker images|grep 1.7.9
nginx 1.7.9 84581e99d807 6 years ago 91.7MB
[root@szdc0-200 ~]# docker tag 84581e99d807 harbor.od.com/public/nginx:v1.7.9
[root@szdc0-200 ~]# docker login harbor.od.com
Username: admin
Password:
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
[root@szdc0-200 ~]# docker push harbor.od.com/public/nginx:v1.7.9
The push refers to repository [harbor.od.com/public/nginx]
5f70bf18a086: Pushed
4b26ab29a475: Pushed
ccb1d68e3fb7: Pushed
e387107e2065: Pushed
63bf84221cce: Pushed
e02dce553481: Pushed
dea2e4984e29: Pushed
v1.7.9: digest: sha256:b1f5935eb2e9e2ae89c0b3e2e148c19068d91ca502e857052f14db230443e4c2 size: 3012
三、部署etcd集群
3.1、集群规划
| 主机名 | 角色 | ip |
|---|---|---|
| szdc0-12.host.com | etcd leader | 10.0.0.12 |
| szdc0-21.host.com | etcd fowler | 10.0.0.21 |
| szdc0-22.host.com | etcd fowler | 10.0.0.22 |
注意：这里部署文档以szdc0-12.host.com主机为例，另外两台主机安装部署方法类似
3.2、安装部署
1）创建基于根证书的config配置文件
[root@szdc0-200 harbor]# cd /opt/certs/
[root@szdc0-200 certs]# vim /opt/certs/ca-config.json
{
"signing": {
"default": {
"expiry": "175200h"
},
"profiles": {
"server": {
"expiry": "175200h",
"usages": [
"signing",
"key encipherment",
"server auth"
]
},
"client": {
"expiry": "175200h",
"usages": [
"signing",
"key encipherment",
"client auth"
]
},
"peer": {
"expiry": "175200h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
证书类型说明：
- client certificate：客户端使用，用于服务端认证客户端，例如etcdctl、etcd proxy、fleetctl、docker客户端
- server certificate：服务器端使用，客户端已验证服务端身份，例如docker服务端、kube-apiserver
- peer certificate：双向证书，用于etcd集群成员间通信
2）创建生成自签证书签名请求(csr)的JSON配置文件
[root@szdc0-200 certs]# vi etcd-peer-csr.json
{
"CN": "k8s-etcd",
"hosts": [
"10.0.0.11",
"10.0.0.12",
"10.0.0.21",
"10.0.0.22"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
3）生成etcd证书和私钥
[root@szdc0-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=peer etcd-peer-csr.json|cfssl-json -bare etcd-peer
2021/04/24 10:51:44 [INFO] generate received request
2021/04/24 10:51:44 [INFO] received CSR
2021/04/24 10:51:44 [INFO] generating key: rsa-2048
2021/04/24 10:51:45 [INFO] encoded CSR
2021/04/24 10:51:45 [INFO] signed certificate with serial number 432984615086878011635103337106412816218660665284
2021/04/24 10:51:45 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@szdc0-200 certs]# ll etcd*
-rw-r--r-- 1 root root 1062 Apr 24 10:51 etcd-peer.csr
-rw-r--r-- 1 root root 363 Apr 24 10:50 etcd-peer-csr.json
-rw------- 1 root root 1679 Apr 24 10:51 etcd-peer-key.pem
-rw-r--r-- 1 root root 1428 Apr 24 10:51 etcd-peer.pem
4）创建etcd用户
[root@szdc0-12 ~]# useradd -s /sbin/nologin -M etcd
5）软件下载
etcd下载地址：https://github.com/etcd-io/etcd/tags
[root@szdc0-12 certs]# cd /opt/src/
[root@szdc0-12 src]# wget https://github.com/etcd-io/etcd/releases/download/v3.1.20/etcd-v3.1.20-linux-amd64.tar.gz
[root@szdc0-12 src]# tar xf etcd-v3.1.20-linux-amd64.tar.gz -C /opt
[root@szdc0-12 src]# cd /opt/
[root@szdc0-12 opt]# mv etcd-v3.1.20-linux-amd64/ etcd-v3.1.20
[root@szdc0-12 opt]# ln -s /opt/etcd-v3.1.20/ /opt/etcd
[root@szdc0-12 opt]# ls -l /opt/
total 0
lrwxrwxrwx 1 root root 18 Apr 24 11:11 etcd -> /opt/etcd-v3.1.20/
drwxr-xr-x 3 478493 89939 123 Oct 11 2018 etcd-v3.1.20
drwxr-xr-x 2 root root 45 Apr 24 11:09 src
6）创建目录，拷贝证书，私钥
[root@szdc0-12 opt]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server
#将运维主机上生成的ca.pem,etcd-peer-key.pem,etcd-peer.pem拷贝到/ope/etcd/certs目录中，注意私钥权限600
[root@szdc0-12 opt]# cd /opt/etcd/certs
[root@szdc0-12 certs]# scp szdc0-200:/opt/certs/ca.pem /opt/etcd/certs/
[root@szdc0-12 certs]# scp szdc0-200:/opt/certs/etcd-peer.pem /opt/etcd/certs/
[root@szdc0-12 certs]# scp szdc0-200:/opt/certs/etcd-peer-key.pem /opt/etcd/certs/
# 修改权限
[root@szdc0-12 certs]# chown -R etcd.etcd /opt/etcd/certs /data/etcd /data/logs/etcd-server
[root@szdc0-12 certs]# ll
total 12
-rw-r--r-- 1 etcd etcd 1346 Apr 24 11:13 ca.pem
-rw------- 1 etcd etcd 1679 Apr 24 11:13 etcd-peer-key.pem
-rw-r--r-- 1 etcd etcd 1428 Apr 24 11:13 etcd-peer.pem
7）创建etcd服务启动脚本
[root@szdc0-12 certs]# vim /opt/etcd/etcd-server-startup.sh
#!/bin/sh
./etcd --name etcd-server-0-12 \
--data-dir /data/etcd/etcd-server \
--listen-peer-urls https://10.0.0.12:2380 \
--listen-client-urls https://10.0.0.12:2379,http://127.0.0.1:2379 \
--quota-backend-bytes 8000000000 \
--initial-advertise-peer-urls https://10.0.0.12:2380 \
--advertise-client-urls https://10.0.0.12:2379,http://127.0.0.1:2379 \
--initial-cluster etcd-server-0-12=https://10.0.0.12:2380,etcd-server-0-21=https://10.0.0.21:2380,etcd-server-0-22=https://10.0.0.22:2380 \
--ca-file ./certs/ca.pem \
--cert-file ./certs/etcd-peer.pem \
--key-file ./certs/etcd-peer-key.pem \
--client-cert-auth \
--trusted-ca-file ./certs/ca.pem \
--peer-ca-file ./certs/ca.pem \
--peer-cert-file ./certs/etcd-peer.pem \
--peer-key-file ./certs/etcd-peer-key.pem \
--peer-client-cert-auth \
--peer-trusted-ca-file ./certs/ca.pem \
--log-output stdout
# 脚本授权
[root@szdc0-12 certs]# chmod +x /opt/etcd/etcd-server-startup.sh
注意：etcd集群各主机的启动脚本略有不同，部署其他节点是需要注意
8）安装supervisor软件
[root@szdc0-12 certs]# yum install supervisor -y
[root@szdc0-12 certs]# systemctl start supervisord.service
[root@szdc0-12 certs]# systemctl enable supervisord.service
9）创建etcd-server的启动配置
[root@szdc0-12 certs]# vim /etc/supervisord.d/etcd-server.ini
[program:etcd-server-0-12]
command=/opt/etcd/etcd-server-startup.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/etcd ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=etcd ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/etcd-server/etcd.stdout.log ; stdout log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
注意：etcd集群各主机启动配置略有不同，配置其他节点时注意修改
10）启动etcd服务并检查
[root@szdc0-12 certs]# supervisorctl update
etcd-server-0-12: added process group
[root@szdc0-12 certs]# supervisorctl status
etcd-server-0-12 RUNNING pid 1794, uptime 0:00:35
[root@szdc0-12 certs]# netstat -lntup|grep etcd
tcp 0 0 10.0.0.12:2379 0.0.0.0:* LISTEN 1795/./etcd
tcp 0 0 127.0.0.1:2379 0.0.0.0:* LISTEN 1795/./etcd
tcp 0 0 10.0.0.12:2380 0.0.0.0:* LISTEN 1795/./etcd
11）安装部署启动检查所有集群规划的etcd服务
在szdc0-21机器上：
[root@szdc0-21 ~]# useradd -s /sbin/nologin -M etcd
[root@szdc0-21 ~]# mkdir /opt/src
[root@szdc0-21 ~]# cd /opt/src
[root@szdc0-21 src]# wget https://github.com/etcd-io/etcd/releases/download/v3.1.20/etcd-v3.1.20-linux-amd64.tar.gz
[root@szdc0-21 src]# tar xf etcd-v3.1.20-linux-amd64.tar.gz -C /opt
[root@szdc0-21 src]# cd /opt/
[root@szdc0-21 opt]# mv etcd-v3.1.20-linux-amd64/ etcd-v3.1.20
[root@szdc0-21 opt]# ln -s /opt/etcd-v3.1.20/ /opt/etcd
[root@szdc0-21 opt]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server
[root@szdc0-21 opt]# cd /opt/etcd/certs
[root@szdc0-21 certs]# scp szdc0-200:/opt/certs/ca.pem /opt/etcd/certs/
[root@szdc0-21 certs]# scp szdc0-200:/opt/certs/etcd-peer-key.pem /opt/etcd/certs/
[root@szdc0-21 certs]# scp szdc0-200:/opt/certs/etcd-peer.pem /opt/etcd/certs/
[root@szdc0-21 certs]# chown -R etcd.etcd /opt/etcd/certs /data/etcd /data/logs/etcd-server
[root@szdc0-21 certs]# vim /opt/etcd/etcd-server-startup.sh
#!/bin/sh
./etcd --name etcd-server-0-21 \
--data-dir /data/etcd/etcd-server \
--listen-peer-urls https://10.0.0.21:2380 \
--listen-client-urls https://10.0.0.21:2379,http://127.0.0.1:2379 \
--quota-backend-bytes 8000000000 \
--initial-advertise-peer-urls https://10.0.0.21:2380 \
--advertise-client-urls https://10.0.0.21:2379,http://127.0.0.1:2379 \
--initial-cluster etcd-server-0-12=https://10.0.0.12:2380,etcd-server-0-21=https://10.0.0.21:2380,etcd-server-0-22=https://10.0.0.22:2380 \
--ca-file ./certs/ca.pem \
--cert-file ./certs/etcd-peer.pem \
--key-file ./certs/etcd-peer-key.pem \
--client-cert-auth \
--trusted-ca-file ./certs/ca.pem \
--peer-ca-file ./certs/ca.pem \
--peer-cert-file ./certs/etcd-peer.pem \
--peer-key-file ./certs/etcd-peer-key.pem \
--peer-client-cert-auth \
--peer-trusted-ca-file ./certs/ca.pem \
--log-output stdout
[root@szdc0-21 certs]# chmod +x /opt/etcd/etcd-server-startup.sh
[root@szdc0-21 certs]# yum install supervisor -y
[root@szdc0-21 certs]# systemctl start supervisord.service
[root@szdc0-21 certs]# systemctl enable supervisord.service
[root@szdc0-21 certs]# vim /etc/supervisord.d/etcd-server.ini
[root@szdc0-21 certs]# cat /etc/supervisord.d/etcd-server.ini
[program:etcd-server-0-21]
command=/opt/etcd/etcd-server-startup.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/etcd ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=etcd ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/etcd-server/etcd.stdout.log ; stdout log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
[root@szdc0-21 certs]# supervisorctl update
[root@szdc0-21 certs]# supervisorctl status
[root@szdc0-21 certs]# netstat -lntup|grep etcd
在szdc0-21机器上:
[root@szdc0-22 ~]# useradd -s /sbin/nologin -M etcd
[root@szdc0-22 ~]# mkdir /opt/src
[root@szdc0-22 ~]# cd /opt/src
[root@szdc0-22 src]# wget https://github.com/etcd-io/etcd/releases/download/v3.1.20/etcd-v3.1.20-linux-amd64.tar.gz
[root@szdc0-22 src]# tar xf etcd-v3.1.20-linux-amd64.tar.gz -C /opt
[root@szdc0-22 src]# cd /opt/
[root@szdc0-22 opt]# mv etcd-v3.1.20-linux-amd64/ etcd-v3.1.20
[root@szdc0-22 opt]# ln -s /opt/etcd-v3.1.20/ /opt/etcd
[root@szdc0-22 opt]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server
[root@szdc0-22 opt]# cd /opt/etcd/certs
[root@szdc0-22 certs]# scp szdc0-200:/opt/certs/ca.pem /opt/etcd/certs/
[root@szdc0-22 certs]# scp szdc0-200:/opt/certs/etcd-peer-key.pem /opt/etcd/certs/
[root@szdc0-22 certs]# scp szdc0-200:/opt/certs/etcd-peer.pem /opt/etcd/certs/
[root@szdc0-22 certs]# chown -R etcd.etcd /opt/etcd/certs /data/etcd /data/logs/etcd-server
[root@szdc0-22 certs]# vim /opt/etcd/etcd-server-startup.sh
#!/bin/sh
./etcd --name etcd-server-0-22 \
--data-dir /data/etcd/etcd-server \
--listen-peer-urls https://10.0.0.22:2380 \
--listen-client-urls https://10.0.0.22:2379,http://127.0.0.1:2379 \
--quota-backend-bytes 8000000000 \
--initial-advertise-peer-urls https://10.0.0.22:2380 \
--advertise-client-urls https://10.0.0.22:2379,http://127.0.0.1:2379 \
--initial-cluster etcd-server-0-12=https://10.0.0.12:2380,etcd-server-0-21=https://10.0.0.21:2380,etcd-server-0-22=https://10.0.0.22:2380 \
--ca-file ./certs/ca.pem \
--cert-file ./certs/etcd-peer.pem \
--key-file ./certs/etcd-peer-key.pem \
--client-cert-auth \
--trusted-ca-file ./certs/ca.pem \
--peer-ca-file ./certs/ca.pem \
--peer-cert-file ./certs/etcd-peer.pem \
--peer-key-file ./certs/etcd-peer-key.pem \
--peer-client-cert-auth \
--peer-trusted-ca-file ./certs/ca.pem \
--log-output stdout
[root@szdc0-22 certs]# chmod +x /opt/etcd/etcd-server-startup.sh
[root@szdc0-22 certs]# yum install supervisor -y
[root@szdc0-22 certs]# systemctl start supervisord.service
[root@szdc0-22 certs]# systemctl enable supervisord.service
[root@szdc0-22 certs]# vim /etc/supervisord.d/etcd-server.ini
[root@szdc0-22 certs]# cat /etc/supervisord.d/etcd-server.ini
[program:etcd-server-0-22]
command=/opt/etcd/etcd-server-startup.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/etcd ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=etcd ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/etcd-server/etcd.stdout.log ; stdout log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
[root@szdc0-22 certs]# supervisorctl update
[root@szdc0-22 certs]# supervisorctl status
[root@szdc0-22 certs]# netstat -lntup|grep etcd
12）查看集群状态
[root@szdc0-12 etcd]# pwd
/opt/etcd
[root@szdc0-12 etcd]# ./etcdctl cluster-health
member 6cbdd801d2c800d9 is healthy: got healthy result from http://127.0.0.1:2379
member 74538ef5dc383e39 is healthy: got healthy result from http://127.0.0.1:2379
member f7a9c20602b8532e is healthy: got healthy result from http://127.0.0.1:2379
cluster is healthy
[root@szdc0-12 etcd]# ./etcdctl member list
6cbdd801d2c800d9: name=etcd-server-0-21 peerURLs=https://10.0.0.21:2380 clientURLs=http://127.0.0.1:2379,https://10.0.0.21:2379 isLeader=false
74538ef5dc383e39: name=etcd-server-0-22 peerURLs=https://10.0.0.22:2380 clientURLs=http://127.0.0.1:2379,https://10.0.0.22:2379 isLeader=false
f7a9c20602b8532e: name=etcd-server-0-12 peerURLs=https://10.0.0.12:2380 clientURLs=http://127.0.0.1:2379,https://10.0.0.12:2379 isLeader=true
四、部署kube-apiserver
4.1、集群规划
| 主机名 | 角色 | ip |
|---|---|---|
| szdc0-21.host.com | kube-apiserver | 10.0.0.21 |
| szdc0-22.host.com | kube-apiserver | 10.0.0.21 |
| szdc0-11.host.com | 4层负载均衡 | 10.0.0.11 |
| szdc0-12.host.com | 4层负载均衡 | 10.0.0.12 |
注意：这里10.0.0.11和10.0.0.12使用nginx做4层负载均衡器，用keepalived跑一个vip：10.0.0.10，代理两个kube-apiserver，实现高可用
这里部署文档以szdc0-21.host.com主机为例，另外一台运算节点安装部署方法类似
4.2、软件下载
kubernetes官方github地址：https://github.com/kubernetes/kubernetes
[root@szdc0-21 ~]# cd /opt/src/
[root@szdc0-21 ~]# wget http://down.sunrisenan.com/k8s/kubernetes/kubernetes-server-linux-amd64-v1.15.2.tar.gz
[root@szdc0-21 src]# tar xf kubernetes-server-linux-amd64-v1.15.2.tar.gz -C /opt/
[root@szdc0-21 src]# cd /opt/
[root@szdc0-21 opt]# mv kubernetes/ kubernetes-v1.15.2
[root@szdc0-21 opt]# ln -s /opt/kubernetes-v1.15.2/ /opt/kubernetes
# 删除源码
[root@szdc0-21 opt]# cd kubernetes
[root@szdc0-21 kubernetes]# rm -f kubernetes-src.tar.gz
[root@szdc0-21 kubernetes]# ll
total 1180
drwxr-xr-x 2 root root 6 Aug 5 2019 addons
-rw-r--r-- 1 root root 1205293 Aug 5 2019 LICENSES
drwxr-xr-x 3 root root 17 Aug 5 2019 server
# 删除docker镜像
[root@szdc0-21 kubernetes]# cd server/bin
[root@szdc0-21 bin]# rm -f *.tar
[root@szdc0-21 bin]# rm -f *_tag
[root@szdc0-21 bin]# ll
total 884636
-rwxr-xr-x 1 root root 43534816 Aug 5 2019 apiextensions-apiserver
-rwxr-xr-x 1 root root 100548640 Aug 5 2019 cloud-controller-manager
-rwxr-xr-x 1 root root 200648416 Aug 5 2019 hyperkube
-rwxr-xr-x 1 root root 40182208 Aug 5 2019 kubeadm
-rwxr-xr-x 1 root root 164501920 Aug 5 2019 kube-apiserver
-rwxr-xr-x 1 root root 116397088 Aug 5 2019 kube-controller-manager
-rwxr-xr-x 1 root root 42985504 Aug 5 2019 kubectl
-rwxr-xr-x 1 root root 119616640 Aug 5 2019 kubelet
-rwxr-xr-x 1 root root 36987488 Aug 5 2019 kube-proxy
-rwxr-xr-x 1 root root 38786144 Aug 5 2019 kube-scheduler
-rwxr-xr-x 1 root root 1648224 Aug 5 2019 mounte
4.3、签发证书
1）创建生成证书请求（csr）的JSON配置文件
[root@szdc0-200 ~]# vim /opt/certs/client-csr.json
{
"CN": "k8s-node",
"hosts": [
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
2）生成client证书和私钥
[root@szdc0-200 ~]# cd /opt/certs/
[root@szdc0-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json |cfssl-json -bare client
2021/04/24 14:29:09 [INFO] generate received request
2021/04/24 14:29:09 [INFO] received CSR
2021/04/24 14:29:09 [INFO] generating key: rsa-2048
2021/04/24 14:29:09 [INFO] encoded CSR
2021/04/24 14:29:09 [INFO] signed certificate with serial number 469093553578142587796569278755462370202199945657
2021/04/24 14:29:09 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@szdc0-200 certs]# ll client*
-rw-r--r-- 1 root root 993 Apr 24 14:29 client.csr
-rw-r--r-- 1 root root 280 Apr 24 14:28 client-csr.json
-rw------- 1 root root 1679 Apr 24 14:29 client-key.pem
-rw-r--r-- 1 root root 1363 Apr 24 14:29 client.pem
4.4、签发kube-apiserver证书
1）创建生成证书签名请求（csr）的josn配置文件
[root@szdc0-200 certs]# vim /opt/certs/apiserver-csr.json
{
"CN": "k8s-apiserver",
"hosts": [
"127.0.0.1",
"10.96.0.1",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local",
"10.0.0.10",
"10.0.0.21",
"10.0.0.22",
"10.0.0.200"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
2）生成kube-apiserver证书和私钥
[root@szdc0-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json |cfssl-json -bare apiserver
2021/04/24 14:32:58 [INFO] generate received request
2021/04/24 14:32:58 [INFO] received CSR
2021/04/24 14:32:58 [INFO] generating key: rsa-2048
2021/04/24 14:32:59 [INFO] encoded CSR
2021/04/24 14:32:59 [INFO] signed certificate with serial number 360987419813662267261841338092576178422049939358
2021/04/24 14:32:59 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@szdc0-200 certs]# ll apiserver*
-rw-r--r-- 1 root root 1249 Apr 24 14:32 apiserver.csr
-rw-r--r-- 1 root root 566 Apr 24 14:32 apiserver-csr.json
-rw------- 1 root root 1679 Apr 24 14:32 apiserver-key.pem
-rw-r--r-- 1 root root 1598 Apr 24 14:32 apiserver.pem
4.5、运算节点配置
1）拷贝证书至各个运算节点，并创建配置
[root@szdc0-21 bin]# pwd
/opt/kubernetes/server/bin
[root@szdc0-21 bin]# mkdir cert
[root@szdc0-21 bin]# scp szdc0-200:/opt/certs/apiserver-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-21 bin]# scp szdc0-200:/opt/certs/apiserver.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-21 bin]# scp szdc0-200:/opt/certs/ca-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-21 bin]# scp szdc0-200:/opt/certs/ca.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-21 bin]# scp szdc0-200:/opt/certs/client-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-21 bin]# scp szdc0-200:/opt/certs/client.pem /opt/kubernetes/server/bin/cert/
2）创建审计配置文件
[root@szdc0-21 bin]# mkdir conf
[root@szdc0-21 bin]# vi conf/audit.yaml
apiVersion: audit.k8s.io/v1beta1 # This is required.
kind: Policy
# Don't generate audit events for all requests in RequestReceived stage.
omitStages:
- "RequestReceived"
rules:
# Log pod changes at RequestResponse level
- level: RequestResponse
resources:
- group: ""
# Resource "pods" doesn't match requests to any subresource of pods,
# which is consistent with the RBAC policy.
resources: ["pods"]
# Log "pods/log", "pods/status" at Metadata level
- level: Metadata
resources:
- group: ""
resources: ["pods/log", "pods/status"]
# Don't log requests to a configmap called "controller-leader"
- level: None
resources:
- group: ""
resources: ["configmaps"]
resourceNames: ["controller-leader"]
# Don't log watch requests by the "system:kube-proxy" on endpoints or services
- level: None
users: ["system:kube-proxy"]
verbs: ["watch"]
resources:
- group: "" # core API group
resources: ["endpoints", "services"]
# Don't log authenticated requests to certain non-resource URL paths.
- level: None
userGroups: ["system:authenticated"]
nonResourceURLs:
- "/api*" # Wildcard matching.
- "/version"
# Log the request body of configmap changes in kube-system.
- level: Request
resources:
- group: "" # core API group
resources: ["configmaps"]
# This rule only applies to resources in the "kube-system" namespace.
# The empty string "" can be used to select non-namespaced resources.
namespaces: ["kube-system"]
# Log configmap and secret changes in all other namespaces at the Metadata level.
- level: Metadata
resources:
- group: "" # core API group
resources: ["secrets", "configmaps"]
# Log all other resources in core and extensions at the Request level.
- level: Request
resources:
- group: "" # core API group
- group: "extensions" # Version of group should NOT be included.
# A catch-all rule to log all other requests at the Metadata level.
- level: Metadata
# Long-running requests like watches that fall under this rule will not
# generate an audit event in RequestReceived.
omitStages:
- "RequestReceived"
3）创建kube-apiserver启动脚本
[root@szdc0-21 bin]# vim /opt/kubernetes/server/bin/kube-apiserver.sh
#!/bin/bash
./kube-apiserver \
--apiserver-count 2 \
--audit-log-path /data/logs/kubernetes/kube-apiserver/audit-log \
--audit-policy-file ./conf/audit.yaml \
--authorization-mode RBAC \
--client-ca-file ./cert/ca.pem \
--requestheader-client-ca-file ./cert/ca.pem \
--enable-admission-plugins NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota \
--etcd-cafile ./cert/ca.pem \
--etcd-certfile ./cert/client.pem \
--etcd-keyfile ./cert/client-key.pem \
--etcd-servers https://10.0.0.12:2379,https://10.0.0.21:2379,https://10.0.0.22:2379 \
--service-account-key-file ./cert/ca-key.pem \
--service-cluster-ip-range 10.96.0.0/22 \
--service-node-port-range 3000-29999 \
--target-ram-mb=1024 \
--kubelet-client-certificate ./cert/client.pem \
--kubelet-client-key ./cert/client-key.pem \
--log-dir /data/logs/kubernetes/kube-apiserver \
--tls-cert-file ./cert/apiserver.pem \
--tls-private-key-file ./cert/apiserver-key.pem \
--v 2
[root@szdc0-21 bin]# chmod +x /opt/kubernetes/server/bin/kube-apiserver.sh
[root@szdc0-21 bin]# mkdir -p /data/logs/kubernetes/kube-apiserver
4）创建supervisor配置
[root@szdc0-21 bin]# vi /etc/supervisord.d/kube-apiserver.ini
[program:kube-apiserver-0-21]
command=/opt/kubernetes/server/bin/kube-apiserver.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/kubernetes/kube-apiserver/apiserver.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
5）启动服务并检查
[root@szdc0-21 bin]# supervisorctl update
kube-apiserver-0-21: added process group
[root@szdc0-21 bin]# supervisorctl status
etcd-server-0-21 RUNNING pid 1305, uptime 0:49:58
kube-apiserver-0-21 RUNNING pid 1462, uptime 0:01:04
[root@szdc0-21 bin]# netstat -lntup|grep kube-apiser
tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 1463/./kube-apiserv
tcp6 0 0 :::6443 :::* LISTEN 1463/./kube-apiserv
6）安装部署启动检查所有集群规划机器
[root@szdc0-22 src]# tar xf kubernetes-server-linux-amd64-v1.15.2.tar.gz -C /opt/
[root@szdc0-22 src]# cd /opt/
[root@szdc0-22 opt]# mv kubernetes kubernetes-v1.15.2
[root@szdc0-22 opt]# ln -s /opt/kubernetes-v1.15.2/ /opt/kubernetes
[root@szdc0-22 opt]# cd kubernetes
[root@szdc0-22 kubernetes]# rm -f kubernetes-src.tar.gz
[root@szdc0-22 kubernetes]# cd server/bin
[root@szdc0-22 bin]# rm -f *.tar
[root@szdc0-22 bin]# rm -f *_tag
[root@szdc0-22 bin]# mkdir cert
[root@szdc0-22 bin]# ll
total 884636
-rwxr-xr-x 1 root root 43534816 Aug 5 2019 apiextensions-apiserver
drwxr-xr-x 2 root root 6 Apr 24 14:48 cert
-rwxr-xr-x 1 root root 100548640 Aug 5 2019 cloud-controller-manager
-rwxr-xr-x 1 root root 200648416 Aug 5 2019 hyperkube
-rwxr-xr-x 1 root root 40182208 Aug 5 2019 kubeadm
-rwxr-xr-x 1 root root 164501920 Aug 5 2019 kube-apiserver
-rwxr-xr-x 1 root root 116397088 Aug 5 2019 kube-controller-manager
-rwxr-xr-x 1 root root 42985504 Aug 5 2019 kubectl
-rwxr-xr-x 1 root root 119616640 Aug 5 2019 kubelet
-rwxr-xr-x 1 root root 36987488 Aug 5 2019 kube-proxy
-rwxr-xr-x 1 root root 38786144 Aug 5 2019 kube-scheduler
-rwxr-xr-x 1 root root 1648224 Aug 5 2019 mounter
[root@szdc0-22 bin]# scp szdc0-200:/opt/certs/apiserver-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 bin]# scp szdc0-200:/opt/certs/apiserver.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 bin]# scp szdc0-200:/opt/certs/ca-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 bin]# scp szdc0-200:/opt/certs/ca.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 bin]# scp szdc0-200:/opt/certs/client-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 bin]# scp szdc0-200:/opt/certs/client.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 bin]# mkdir conf
[root@szdc0-22 bin]# vi conf/audit.yaml
apiVersion: audit.k8s.io/v1beta1 # This is required.
kind: Policy
# Don't generate audit events for all requests in RequestReceived stage.
omitStages:
- "RequestReceived"
rules:
# Log pod changes at RequestResponse level
- level: RequestResponse
resources:
- group: ""
# Resource "pods" doesn't match requests to any subresource of pods,
# which is consistent with the RBAC policy.
resources: ["pods"]
# Log "pods/log", "pods/status" at Metadata level
- level: Metadata
resources:
- group: ""
resources: ["pods/log", "pods/status"]
# Don't log requests to a configmap called "controller-leader"
- level: None
resources:
- group: ""
resources: ["configmaps"]
resourceNames: ["controller-leader"]
# Don't log watch requests by the "system:kube-proxy" on endpoints or services
- level: None
users: ["system:kube-proxy"]
verbs: ["watch"]
resources:
- group: "" # core API group
resources: ["endpoints", "services"]
# Don't log authenticated requests to certain non-resource URL paths.
- level: None
userGroups: ["system:authenticated"]
nonResourceURLs:
- "/api*" # Wildcard matching.
- "/version"
# Log the request body of configmap changes in kube-system.
- level: Request
resources:
- group: "" # core API group
resources: ["configmaps"]
# This rule only applies to resources in the "kube-system" namespace.
# The empty string "" can be used to select non-namespaced resources.
namespaces: ["kube-system"]
# Log configmap and secret changes in all other namespaces at the Metadata level.
- level: Metadata
resources:
- group: "" # core API group
resources: ["secrets", "configmaps"]
# Log all other resources in core and extensions at the Request level.
- level: Request
resources:
- group: "" # core API group
- group: "extensions" # Version of group should NOT be included.
# A catch-all rule to log all other requests at the Metadata level.
- level: Metadata
# Long-running requests like watches that fall under this rule will not
# generate an audit event in RequestReceived.
omitStages:
- "RequestReceived"
[root@szdc0-22 bin]# vi /opt/kubernetes/server/bin/kube-apiserver.sh
#!/bin/bash
./kube-apiserver \
--apiserver-count 2 \
--audit-log-path /data/logs/kubernetes/kube-apiserver/audit-log \
--audit-policy-file ./conf/audit.yaml \
--authorization-mode RBAC \
--client-ca-file ./cert/ca.pem \
--requestheader-client-ca-file ./cert/ca.pem \
--enable-admission-plugins NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota \
--etcd-cafile ./cert/ca.pem \
--etcd-certfile ./cert/client.pem \
--etcd-keyfile ./cert/client-key.pem \
--etcd-servers https://10.0.0.12:2379,https://10.0.0.21:2379,https://10.0.0.22:2379 \
--service-account-key-file ./cert/ca-key.pem \
--service-cluster-ip-range 10.96.0.0/22 \
--service-node-port-range 3000-29999 \
--target-ram-mb=1024 \
--kubelet-client-certificate ./cert/client.pem \
--kubelet-client-key ./cert/client-key.pem \
--log-dir /data/logs/kubernetes/kube-apiserver \
--tls-cert-file ./cert/apiserver.pem \
--tls-private-key-file ./cert/apiserver-key.pem \
--v 2
[root@szdc0-22 bin]# chmod +x /opt/kubernetes/server/bin/kube-apiserver.sh
[root@szdc0-22 bin]# mkdir -p /data/logs/kubernetes/kube-apiserver
[root@szdc0-22 bin]# vi /etc/supervisord.d/kube-apiserver.ini
[program:kube-apiserver-0-22]
command=/opt/kubernetes/server/bin/kube-apiserver.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/kubernetes/kube-apiserver/apiserver.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
[root@szdc0-22 bin]# supervisorctl update
kube-apiserver-0-22: added process group
[root@szdc0-22 bin]# supervisorctl status
etcd-server-0-22 RUNNING pid 3245, uptime 1:13:12
kube-apiserver-0-22 RUNNING pid 3361, uptime 0:00:44
[root@szdc0-22 bin]# netstat -lntup|grep kube-apiser
tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 3362/./kube-apiserv
tcp6 0 0 :::6443 :::* LISTEN 3362/./kube-apiserv
4.6、配置四层反向代理
1）部署nginx
# 在szdc0-11和szdc0-12上
~]# yum install nginx -y
2）配置4层代理
# 在szdc0-11和szdc0-12上,在http块外
~]# vim /etc/nginx/nginx.conf
stream {
upstream kube-apiserver {
server 10.0.0.21:6443 max_fails=3 fail_timeout=30s;
server 10.0.0.22:6443 max_fails=3 fail_timeout=30s;
}
server {
listen 7443;
proxy_connect_timeout 2s;
proxy_timeout 900s;
proxy_pass kube-apiserver;
}
}
~]# nginx -t
~]# systemctl start nginx && systemctl enable nginx
3）部署keepalived服务
# 在szdc0-11和szdc0-12上
~]# yum install keepalived -y
4）配置keepalived
配置监控端口脚本
# 在szdc0-11和szdc0-12上
~]# vi /etc/keepalived/check_port.sh
#!/bin/bash
CHK_PORT=$1
if [ -n "$CHK_PORT" ];then
PORT_PROCESS=`ss -lnt|grep $CHK_PORT|wc -l`
if [ $PORT_PROCESS -eq 0 ];then
echo "Port $CHK_PORT Is Not Used,End."
exit 1
fi
else
echo "Check Port Cant Be Empty!"
fi
~]# chmod +x /etc/keepalived/check_port.sh
在szdc0-11上配置keepalived master：
[root@szdc0-11 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id 10.0.0.11
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_port.sh 7443"
interval 2
weight -20
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 251
priority 100
advert_int 1
mcast_src_ip 10.0.0.11
nopreempt
authentication {
auth_type PASS
auth_pass 11111111
}
track_script {
chk_nginx
}
virtual_ipaddress {
10.0.0.10
}
}
在szdc0-12上配置keepalived 备：
[root@szdc0-12 etcd]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id 10.0.0.12
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_port.sh 7443"
interval 2
weight -20
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 251
mcast_src_ip 10.0.0.12
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 11111111
}
track_script {
chk_nginx
}
virtual_ipaddress {
10.0.0.10
}
}
5）启动keepalived
# 在szdc0-11和szdc0-12上
~]# systemctl start keepalived && systemctl enable keepalived
6）检查VIP
[root@szdc0-11 ~]# ip a |grep eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 10.0.0.11/24 brd 10.0.0.255 scope global eth0
inet 10.0.0.10/32 scope global eth0
[root@szdc0-12 etcd]# ip a |grep eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 10.0.0.12/24 brd 10.0.0.255 scope global eth0
7）启动代理并检查
[root@szdc0-21 bin]# netstat -lntup|grep kube-apiser
tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 1463/./kube-apiserv
tcp6 0 0 :::6443 :::* LISTEN 1463/./kube-apiserv
[root@szdc0-22 bin]# netstat -lntup|grep kube-apiser
tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 3362/./kube-apiserv
tcp6 0 0 :::6443 :::* LISTEN 3362/./kube-apiserv
[root@szdc0-11 ~]# netstat -lntup|grep 7443
tcp 0 0 0.0.0.0:7443 0.0.0.0:* LISTEN 3231/nginx: master
[root@szdc0-12 etcd]# netstat -lntup|grep 7443
tcp 0 0 0.0.0.0:7443 0.0.0.0:* LISTEN 2024/nginx: master
五、部署controller-manager
5.1、集群规划
| 主机名 | 角色 | ip |
|---|---|---|
| szdc0-21.host.com | controller-manager | 10.0.0.21 |
| szdc0-22.host.com | controller-manager | 10.0.0.22 |
注意：这里部署文档以szdc0-21.host.com主机为例，另外一台运算节点安装部署方法类似
5.2、部署步骤
1）创建启动脚本
# 在szdc0-21和szdc0-22上
~]# vim /opt/kubernetes/server/bin/kube-controller-manager.sh
#!/bin/sh
./kube-controller-manager \
--cluster-cidr 172.6.0.0/16 \
--leader-elect true \
--log-dir /data/logs/kubernetes/kube-controller-manager \
--master http://127.0.0.1:8080 \
--service-account-private-key-file ./cert/ca-key.pem \
--service-cluster-ip-range 10.96.0.0/22 \
--root-ca-file ./cert/ca.pem \
--v 2
~]# chmod +x /opt/kubernetes/server/bin/kube-controller-manager.sh
~]# mkdir -p /data/logs/kubernetes/kube-controller-manager
2）创建supervisor配置，注意修改配置
# 在szdc0-21和szdc0-22上
~]# vi /etc/supervisord.d/kube-conntroller-manager.ini
[program:kube-controller-manager-0-21]
command=/opt/kubernetes/server/bin/kube-controller-manager.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/kubernetes/kube-controller-manager/controller.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false
3）启动服务并检查
[root@szdc0-21 bin]# supervisorctl update
kube-controller-manager-0-21: added process group
[root@szdc0-21 bin]# supervisorctl status
etcd-server-0-21 RUNNING pid 1305, uptime 1:45:22
kube-apiserver-0-21 RUNNING pid 1462, uptime 0:56:28
kube-controller-manager-0-21 RUNNING pid 1552, uptime 0:00:34
[root@szdc0-22 bin]# supervisorctl update
kube-controller-manager-0-22: added process group
[root@szdc0-22 bin]# supervisorctl status
etcd-server-0-22 RUNNING pid 3245, uptime 2:00:15
kube-apiserver-0-22 RUNNING pid 3361, uptime 0:47:47
kube-controller-manager-0-22 RUNNING pid 3435, uptime 0:01:22
六、部署kube-scheduler
6.1、集群规划
| 主机名 | 角色 | ip |
|---|---|---|
| szdc0-21.host.com | kube-controller-manager | 10.0.0.21 |
| szdc0-22.host.com | kube-controller-manager | 10.0.0.22 |
注意：这里部署文档以szdc0-21.host.com主机为例，另外一台运算节点安装部署方法类似
6.2、部署步骤
1）创建启动脚本
# 在szdc0-21和szdc0-22上
~]# vi /opt/kubernetes/server/bin/kube-scheduler.sh
#!/bin/sh
./kube-scheduler \
--leader-elect \
--log-dir /data/logs/kubernetes/kube-scheduler \
--master http://127.0.0.1:8080 \
--v 2
~]# chmod +x /opt/kubernetes/server/bin/kube-scheduler.sh
~]# mkdir -p /data/logs/kubernetes/kube-scheduler
2）创建supervisor配置
# 在szdc0-21和szdc0-22上，注意修改配置
~]# vi /etc/supervisord.d/kube-scheduler.ini
[program:kube-scheduler-0-21]
command=/opt/kubernetes/server/bin/kube-scheduler.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/kubernetes/kube-scheduler/scheduler.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
3）启动服务并检查
[root@szdc0-21 bin]# supervisorctl update
kube-scheduler-0-21: added process group
[root@szdc0-21 bin]# supervisorctl status
etcd-server-0-21 RUNNING pid 1305, uptime 2:03:34
kube-apiserver-0-21 RUNNING pid 1462, uptime 1:14:40
kube-controller-manager-0-21 RUNNING pid 1552, uptime 0:18:46
kube-scheduler-0-21 RUNNING pid 1581, uptime 0:01:19
[root@szdc0-22 bin]# supervisorctl update
kube-scheduler-0-22: added process group
[root@szdc0-22 bin]# supervisorctl status
etcd-server-0-22 RUNNING pid 3245, uptime 2:17:42
kube-apiserver-0-22 RUNNING pid 3361, uptime 1:05:14
kube-controller-manager-0-22 RUNNING pid 3435, uptime 0:18:49
kube-scheduler-0-22 RUNNING pid 3459, uptime 0:01:22
七、kubect1命令配置
在各运算节点上：
~]# ln -s /opt/kubernetes/server/bin/kubectl /usr/bin/kubectl
# 命令自动补全
~]# yum install bash-completion -y
~]# kubectl completion bash > /etc/bash_completion.d/kubectl
检查主控节点状态：
~]# which kubectl
/usr/bin/kubectl
~]# kubectl get cs
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy {"health": "true"}
etcd-2 Healthy {"health": "true"}
etcd-1 Healthy {"health": "true"}
八、部署kubelet
8.1、集群规划
| 主机名 | 角色 | ip |
|---|---|---|
| szdc0-21.host.com | kubelet | 10.0.0.21 |
| szdc0-22.host.com | kubelet | 10.0.0.22 |
注意：这里部署文档以szdc0-21.host.com主机为例，另外一台运算节点安装部署方法类似
8.2、部署步骤
1）创建生成正事签名请求（csr）的JSON配置文件
# 注意：把所有有可能用到的kubulet主机全加进去
[root@szdc0-200 certs]# vi /opt/certs/kubelet-csr.json
{
"CN": "k8s-kubelet",
"hosts": [
"127.0.0.1",
"10.0.0.10",
"10.0.0.21",
"10.0.0.22",
"10.0.0.23",
"10.0.0.24",
"10.0.0.25",
"10.0.0.26"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
2）生成kubelet证书和私钥
[root@szdc0-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server kubelet-csr.json | cfssl-json -bare kubelet
2021/04/24 16:19:40 [INFO] generate received request
2021/04/24 16:19:40 [INFO] received CSR
2021/04/24 16:19:40 [INFO] generating key: rsa-2048
2021/04/24 16:19:40 [INFO] encoded CSR
2021/04/24 16:19:40 [INFO] signed certificate with serial number 301819791217431241534592522212960523884453506155
2021/04/24 16:19:40 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@szdc0-200 certs]# ll kubelet*
-rw-r--r-- 1 root root 1098 Apr 24 16:19 kubelet.csr
-rw-r--r-- 1 root root 418 Apr 24 16:18 kubelet-csr.json
-rw------- 1 root root 1675 Apr 24 16:19 kubelet-key.pem
-rw-r--r-- 1 root root 1452 Apr 24 16:19 kubelet.pem
3）拷贝证书，私钥，注意私钥文件属性600
[root@szdc0-21 ~]# scp szdc0-200:/opt/certs/kubelet-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-21 ~]# scp szdc0-200:/opt/certs/kubelet.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 ~]# scp szdc0-200:/opt/certs/kubelet-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 ~]# scp szdc0-200:/opt/certs/kubelet.pem /opt/kubernetes/server/bin/cert/
4）创建配置
# 注意：在conf目录下
[root@szdc0-21 conf]# pwd
/opt/kubernetes/server/bin/conf
# set-cluster
kubectl config set-cluster myk8s \
--certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem \
--embed-certs=true \
--server=https://10.0.0.10:7443 \
--kubeconfig=kubelet.kubeconfig
# set-credentials
kubectl config set-credentials k8s-node \
--client-certificate=/opt/kubernetes/server/bin/cert/client.pem \
--client-key=/opt/kubernetes/server/bin/cert/client-key.pem \
--embed-certs=true \
--kubeconfig=kubelet.kubeconfig
# set-context
kubectl config set-context myk8s-context \
--cluster=myk8s \
--user=k8s-node \
--kubeconfig=kubelet.kubeconfig
# use-context
kubectl config use-context myk8s-context --kubeconfig=kubelet.kubeconfig
[root@szdc0-21 conf]# ll
total 12
-rw-r--r-- 1 root root 2223 Apr 24 14:40 audit.yaml
-rw------- 1 root root 6199 Apr 24 16:26 kubelet.kubeconfig
5）创建资源配置文件
root@szdc0-21 conf]# vim /opt/kubernetes/server/bin/conf/k8s-node.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: k8s-node
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:node
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: k8s-node
# 集群角色用户生效
[root@szdc0-21 conf]# kubectl create -f k8s-node.yaml
clusterrolebinding.rbac.authorization.k8s.io/k8s-node created
# 查看集群角色
[root@szdc0-21 conf]# kubectl get clusterrolebinding k8s-node
NAME AGE
k8s-node 44s
[root@szdc0-21 conf]# kubectl get clusterrolebinding k8s-node -o yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
creationTimestamp: "2021-04-24T08:29:07Z"
name: k8s-node
resourceVersion: "3739"
selfLink: /apis/rbac.authorization.k8s.io/v1/clusterrolebindings/k8s-node
uid: dc2370cc-9bfe-405c-8f0d-961533e4c9b2
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:node
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: k8s-node
6）拷贝生成的配置至其他节点
[root@szdc0-22 ~]# scp szdc0-21:/opt/kubernetes/server/bin/conf/kubelet.kubeconfig /opt/kubernetes/server/bin/conf/
[root@szdc0-22 ~]# scp szdc0-21:/opt/kubernetes/server/bin/conf/k8s-node.yaml /opt/kubernetes/server/bin/conf/
7）准备pause基础镜像
# 运维主机上
[root@szdc0-200 certs]# docker pull kubernetes/pause
[root@szdc0-200 certs]# docker images|grep pause
kubernetes/pause latest f9d5de079539 6 years ago 240kB
[root@szdc0-200 certs]# docker tag f9d5de079539 harbor.od.com/public/pause:latest
[root@szdc0-200 certs]# docker push harbor.od.com/public/pause:latest
8）创建kubelet启动脚本
# 注意：kubelet集群各主机的启动脚本略有不同，部署其节点时注意修改hostname-override
[root@szdc0-21 conf]# vi /opt/kubernetes/server/bin/kubelet.sh
#!/bin/sh
./kubelet \
--anonymous-auth=false \
--cgroup-driver systemd \
--cluster-dns 10.96.0.2 \
--cluster-domain cluster.local \
--runtime-cgroups=/systemd/system.slice \
--kubelet-cgroups=/systemd/system.slice \
--fail-swap-on="false" \
--client-ca-file ./cert/ca.pem \
--tls-cert-file ./cert/kubelet.pem \
--tls-private-key-file ./cert/kubelet-key.pem \
--hostname-override szdc0-21.host.com \
--image-gc-high-threshold 20 \
--image-gc-low-threshold 10 \
--kubeconfig ./conf/kubelet.kubeconfig \
--log-dir /data/logs/kubernetes/kube-kubelet \
--pod-infra-container-image harbor.od.com/public/pause:latest \
--root-dir /data/kubelet
[root@szdc0-21 conf]# ls -l|grep kubelet.kubeconfig
-rw------- 1 root root 6199 Apr 24 16:26 kubelet.kubeconfig
[root@szdc0-21 conf]# chmod +x /opt/kubernetes/server/bin/kubelet.sh
[root@szdc0-21 conf]# mkdir -p /data/logs/kubernetes/kube-kubelet /data/kubelet
9）创建supervisor配置
[root@szdc0-21 conf]# vi /etc/supervisord.d/kube-kubelet.ini
[program:kube-kubelet-0-21]
command=/opt/kubernetes/server/bin/kubelet.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/kubernetes/kube-kubelet/kubelet.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
10）启动服务并检查
[root@szdc0-21 conf]# supervisorctl update
kube-kubelet-0-21: added process group
[root@szdc0-21 conf]# supervisorctl status
etcd-server-0-21 RUNNING pid 1305, uptime 2:48:29
kube-apiserver-0-21 RUNNING pid 1462, uptime 1:59:35
kube-controller-manager-0-21 RUNNING pid 1552, uptime 1:03:41
kube-kubelet-0-21 RUNNING pid 1801, uptime 0:03:15
kube-scheduler-0-21 RUNNING pid 1581, uptime 0:46:14
[root@szdc0-22 ~]# supervisorctl update
kube-kubelet-0-22: added process group
[root@szdc0-22 ~]# supervisorctl status
etcd-server-0-22 RUNNING pid 3245, uptime 3:03:02
kube-apiserver-0-22 RUNNING pid 3361, uptime 1:50:34
kube-controller-manager-0-22 RUNNING pid 3435, uptime 1:04:09
kube-kubelet-0-22 RUNNING pid 4021, uptime 0:00:38
kube-scheduler-0-22 RUNNING pid 3459, uptime 0:46:42
# 如果有报错查看日志
[root@szdc0-22 ~]# tail -fn 200 /data/logs/kubernetes/kube-kubelet/kubelet.stdout.log
11）检查运算节点
[root@szdc0-21 conf]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
szdc0-21.host.com Ready <none> 5m34s v1.15.2
szdc0-22.host.com Ready <none> 2m27s v1.15.2
[root@szdc0-21 conf]# kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
szdc0-21.host.com Ready <none> 5m44s v1.15.2 10.0.0.21 <none> CentOS Linux 7 (Core) 3.10.0-693.el7.x86_64 docker://20.10.6
szdc0-22.host.com Ready <none> 2m37s v1.15.2 10.0.0.22 <none> CentOS Linux 7 (Core) 3.10.0-693.el7.x86_64 docker://20.10.6
# 给节点打标签
[root@szdc0-21 conf]# kubectl label node szdc0-21.host.com node-role.kubernetes.io/node=
node/szdc0-21.host.com labeled
[root@szdc0-21 conf]# kubectl label node szdc0-21.host.com node-role.kubernetes.io/master=
node/szdc0-21.host.com labeled
[root@szdc0-21 conf]# kubectl label node szdc0-22.host.com node-role.kubernetes.io/node=
node/szdc0-22.host.com labeled
[root@szdc0-21 conf]# kubectl label node szdc0-22.host.com node-role.kubernetes.io/master=
node/szdc0-22.host.com labeled
[root@szdc0-21 conf]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
szdc0-21.host.com Ready master,node 7m4s v1.15.2
szdc0-22.host.com Ready master,node 3m57s v1.15.2
九、部署kube-proxy
9.1、集群规划
| 主机名 | 角色 | ip |
|---|---|---|
| szdc0-21.host.com | kube-proxy | 10.0.0.21 |
| szdc0-22.host.com | kube-proxy | 10.0.0.22 |
注意：这里部署文档以szdc0-21.host.com主机为例，另外一台运算节点安装部署方法类似
9.2、部署步骤
1）创建生成证书签名请求（csr）的JSON文件
[root@szdc0-200 certs]# vi /opt/certs/kube-proxy-csr.json
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
2）生成kubelet证书和私钥
[root@szdc0-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client kube-proxy-csr.json |cfssl-json -bare kube-proxy-client
2021/04/24 17:20:29 [INFO] generate received request
2021/04/24 17:20:29 [INFO] received CSR
2021/04/24 17:20:29 [INFO] generating key: rsa-2048
2021/04/24 17:20:29 [INFO] encoded CSR
2021/04/24 17:20:29 [INFO] signed certificate with serial number 185252091870579448935356842900642893459983568399
2021/04/24 17:20:29 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@szdc0-200 certs]# ll kube-proxy*
-rw-r--r-- 1 root root 1005 Apr 24 17:20 kube-proxy-client.csr
-rw------- 1 root root 1675 Apr 24 17:20 kube-proxy-client-key.pem
-rw-r--r-- 1 root root 1375 Apr 24 17:20 kube-proxy-client.pem
-rw-r--r-- 1 root root 267 Apr 24 17:19 kube-proxy-csr.json
注意：这里的clent不能与其他的通用，上面CN变了，"CN": "system:kube-proxy"
3）拷贝证书
[root@szdc0-21 conf]# scp szdc0-200:/opt/certs/kube-proxy-client-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-21 conf]# scp szdc0-200:/opt/certs/kube-proxy-client.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 conf]# scp szdc0-200:/opt/certs/kube-proxy-client-key.pem /opt/kubernetes/server/bin/cert/
[root@szdc0-22 conf]# scp szdc0-200:/opt/certs/kube-proxy-client.pem /opt/kubernetes/server/bin/cert/
4）创建配置
# 注意：在conf目录下
[root@szdc0-21 conf]# pwd
/opt/kubernetes/server/bin/conf
# set-cluster
kubectl config set-cluster myk8s \
--certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem \
--embed-certs=true \
--server=https://10.0.0.10:7443 \
--kubeconfig=kube-proxy.kubeconfig
# set-credentials
kubectl config set-credentials kube-proxy \
--client-certificate=/opt/kubernetes/server/bin/cert/kube-proxy-client.pem \
--client-key=/opt/kubernetes/server/bin/cert/kube-proxy-client-key.pem \
--embed-certs=true \
--kubeconfig=kube-proxy.kubeconfig
# set-context
kubectl config set-context myk8s-context \
--cluster=myk8s \
--user=kube-proxy \
--kubeconfig=kube-proxy.kubeconfig
# use-context
kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig
5）加载ipvs模块
# 两个节点都需要做
[root@szdc0-21 conf]# vi /root/ipvs.sh
#!/bin/bash
ipvs_mods_dir="/usr/lib/modules/$(uname -r)/kernel/net/netfilter/ipvs"
for i in $(ls $ipvs_mods_dir|grep -o "^[^.]*")
do
/sbin/modinfo -F filename $i &>/dev/null
if [ $? -eq 0 ];then
/sbin/modprobe $i
fi
done
[root@szdc0-21 conf]# vi /root/ipvs.sh
[root@szdc0-21 conf]# sh /root/ipvs.sh
[root@szdc0-21 conf]# lsmod |grep ip_vs
ip_vs_wrr 12697 0
ip_vs_wlc 12519 0
ip_vs_sh 12688 0
ip_vs_sed 12519 0
ip_vs_rr 12600 0
ip_vs_pe_sip 12697 0
nf_conntrack_sip 33860 1 ip_vs_pe_sip
ip_vs_nq 12516 0
ip_vs_lc 12516 0
ip_vs_lblcr 12922 0
ip_vs_lblc 12819 0
ip_vs_ftp 13079 0
ip_vs_dh 12688 0
ip_vs 141092 24 ip_vs_dh,ip_vs_lc,ip_vs_nq,ip_vs_rr,ip_vs_sh,ip_vs_ftp,ip_vs_sed,ip_vs_wlc,ip_vs_wrr,ip_vs_pe_sip,ip_vs_lblcr,ip_vs_lblc
nf_nat 26787 3 ip_vs_ftp,nf_nat_ipv4,nf_nat_masquerade_ipv4
nf_conntrack 133387 8 ip_vs,nf_nat,nf_nat_ipv4,xt_conntrack,nf_nat_masquerade_ipv4,nf_conntrack_netlink,nf_conntrack_sip,nf_conntrack_ipv4
libcrc32c 12644 4 xfs,ip_vs,nf_nat,nf_conntrack
6）创建kube-proxy启动脚本
# 注意修改hostname-override
[root@szdc0-21 conf]# vi /opt/kubernetes/server/bin/kube-proxy.sh
#!/bin/sh
./kube-proxy \
--cluster-cidr 172.6.0.0/16 \
--hostname-override szdc0-21.host.com \
--proxy-mode=ipvs \
--ipvs-scheduler=nq \
--kubeconfig ./conf/kube-proxy.kubeconfig
[root@szdc0-21 conf]# ls -l|grep kube-proxy.kubeconfig
-rw------- 1 root root 6215 Apr 24 17:25 kube-proxy.kubeconfig
[root@szdc0-21 conf]# chmod +x /opt/kubernetes/server/bin/kube-proxy.sh
[root@szdc0-21 conf]# mkdir -p /data/logs/kubernetes/kube-proxy
7）创建supervisor配置
[root@szdc0-21 conf]# vi /etc/supervisord.d/kube-proxy.ini
[program:kube-proxy-0-21]
command=/opt/kubernetes/server/bin/kube-proxy.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/kubernetes/kube-proxy/proxy.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
8）启动服务并检查
[root@szdc0-21 conf]# supervisorctl update
kube-proxy-0-21: added process group
[root@szdc0-21 conf]# supervisorctl status
etcd-server-0-21 RUNNING pid 1305, uptime 3:39:36
kube-apiserver-0-21 RUNNING pid 1462, uptime 2:50:42
kube-controller-manager-0-21 RUNNING pid 1552, uptime 1:54:48
kube-kubelet-0-21 RUNNING pid 1801, uptime 0:54:22
kube-proxy-0-21 RUNNING pid 11937, uptime 0:04:07
kube-scheduler-0-21 RUNNING pid 1581, uptime 1:37:21
[root@szdc0-22 conf]# supervisorctl update
kube-proxy-0-22: added process group
[root@szdc0-22 conf]# supervisorctl status
etcd-server-0-22 RUNNING pid 3245, uptime 3:54:32
kube-apiserver-0-22 RUNNING pid 3361, uptime 2:42:04
kube-controller-manager-0-22 RUNNING pid 3435, uptime 1:55:39
kube-kubelet-0-22 RUNNING pid 4021, uptime 0:52:08
kube-proxy-0-22 RUNNING pid 14293, uptime 0:00:36
kube-scheduler-0-22 RUNNING pid 3459, uptime 1:38:12
9）安装ipvsadm
# 两个节点都要安装
[root@szdc0-21 conf]# yum install ipvsadm -y
[root@szdc0-21 conf]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.96.0.1:443 nq
-> 10.0.0.21:6443 Masq 1 0 0
-> 10.0.0.22:6443 Masq 1 0 0
[root@szdc0-21 conf]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 173m
十、完成部署并验证集群
1）创建资源配置清单
[root@szdc0-21 ~]# vim /root/nginx-ds.yaml
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: nginx-ds
spec:
template:
metadata:
labels:
app: nginx-ds
spec:
containers:
- name: my-nginx
image: harbor.od.com/public/nginx:v1.7.9
ports:
- containerPort: 80
2）集群运算节点登录harbor
[root@szdc0-21 ~]# docker login harbor.od.com
[root@szdc0-22 ~]# docker login harbor.od.com
3）创建pod
[root@szdc0-21 ~]# kubectl create -f nginx-ds.yaml
daemonset.extensions/nginx-ds created
[root@szdc0-21 ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-ds-9q9jm 1/1 Running 0 10s
nginx-ds-vbwbk 1/1 Running 0 10s
[root@szdc0-21 ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ds-9q9jm 1/1 Running 0 108s 172.6.21.2 szdc0-21.host.com <none> <none>
nginx-ds-vbwbk 1/1 Running 0 108s 172.6.22.2 szdc0-22.host.com <none> <none>
[root@szdc0-21 ~]# kubectl get cs
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy {"health": "true"}
etcd-1 Healthy {"health": "true"}
etcd-2 Healthy {"health": "true"}
4）注意
目前集群各个pod之间不能通信，没安装CoreDNS插件
[root@szdc0-21 ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ds-9q9jm 1/1 Running 0 108s 172.6.21.2 szdc0-21.host.com <none> <none>
nginx-ds-vbwbk 1/1 Running 0 108s 172.6.22.2 szdc0-22.host.com <none> <none>
[root@szdc0-21 ~]# kubectl exec -it nginx-ds-9q9jm /bin/bash
root@nginx-ds-9q9jm:/# ping 172.6.22.2 # 不通
十一、部署CNI网络插件-flannel
11.1、集群规划
| 主机名 | 角色 | ip |
|---|---|---|
| szdc0-21.host.com | flannel | 10.0.0.21 |
| szdc0-22.host.com | flannel | 10.0.0.22 |
注意：这里部署文档以szdc0-21.host.com主机为例，另外一台运算节点安装部署方法类似
11.2、部署步骤
1）软件下载
下载地址：https://github.com/flannel-io/flannel/releases
[root@szdc0-21 ~]# cd /opt/src/
[root@szdc0-21 src]# wget https://github.com/coreos/flannel/releases/download/v0.11.0/flannel-v0.11.0-linux-amd64.tar.gz
[root@szdc0-21 src]# mkdir /opt/flannel-v0.11.0
[root@szdc0-21 src]# tar xf flannel-v0.11.0-linux-amd64.tar.gz -C /opt/flannel-v0.11.0/
[root@szdc0-21 src]# ln -s /opt/flannel-v0.11.0/ /opt/flannel
[root@szdc0-21 src]# ll /opt/flannel
lrwxrwxrwx 1 root root 21 Apr 24 18:33 /opt/flannel -> /opt/flannel-v0.11.0/
[root@szdc0-21 src]# ll /opt/flannel
flannel/ flannel-v0.11.0/
[root@szdc0-21 src]# ll /opt/flannel-v0.11.0/
total 34436
-rwxr-xr-x 1 root root 35249016 Jan 29 2019 flanneld
-rwxr-xr-x 1 root root 2139 Oct 23 2018 mk-docker-opts.sh
-rw-r--r-- 1 root root 4300 Oct 23 2018 README.md
2）拷贝证书
[root@szdc0-21 src]# mkdir /opt/flannel/cert/
[root@szdc0-21 src]# cd /opt/flannel/cert/
[root@szdc0-21 cert]# scp szdc0-200:/opt/certs/ca.pem /opt/flannel/cert/
[root@szdc0-21 cert]# scp szdc0-200:/opt/certs/client.pem /opt/flannel/cert/
[root@szdc0-21 cert]# scp szdc0-200:/opt/certs/client-key.pem /opt/flannel/cert/
3）创建fiannel配置
[root@szdc0-21 flannel]# pwd
/opt/flannel
[root@szdc0-21 flannel]# vi subnet.env
FLANNEL_NETWORK=172.6.0.0/16
FLANNEL_SUBNET=172.6.21.1/24
FLANNEL_MTU=1500
FLANNEL_IPMASQ=false
注意：flannel集群各主机的配置略有不同，部署其他节点时之一修改。
4）创建启动脚本
[root@szdc0-21 flannel]# vi flanneld.sh
#!/bin/sh
./flanneld \
--public-ip=10.0.0.21 \
--etcd-endpoints=https://10.0.0.12:2379,https://10.0.0.21:2379,https://10.0.0.22:2379 \
--etcd-keyfile=./cert/client-key.pem \
--etcd-certfile=./cert/client.pem \
--etcd-cafile=./cert/ca.pem \
--iface=eth0 \
--subnet-file=./subnet.env \
--healthz-port=2401
[root@szdc0-21 flannel]# chmod +x /opt/flannel/flanneld.sh
[root@szdc0-21 flannel]# mkdir -p /data/logs/flanneld
注意：flannel集群各主机的启动脚本略有不同，部署其他节点时注意修改
5）创建supervisor配置
[root@szdc0-21 flannel]# vim /etc/supervisord.d/flannel.ini
[program:flanneld-0-21]
command=/opt/flannel/flanneld.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/flannel ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
killasgroup=true ; kill all process in a group
stopasgroup=true ; stop all process in a group
stdout_logfile=/data/logs/flanneld/flanneld.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
killasgroup=true
stopasgroup=true
注意：flannel集群各主机的启动脚本略有不同，部署其他节点时注意修改
supervisord管理进程的时候，默认是不kill子进程的，需要在对应的服务.ini配置文件中加以下两个配置：
killasgroup=true
stopasgroup=true
6）操作etcd，增加host-gw
# 只需要在一台上做就行，etcd会自动同步
[root@szdc0-21 flannel]# cd /opt/etcd
[root@szdc0-21 etcd]# ./etcdctl set /coreos.com/network/config '{"Network": "172.6.0.0/16", "Backend": {"Type": "host-gw"}}'
{"Network": "172.6.0.0/16", "Backend": {"Type": "host-gw"}}
[root@szdc0-21 etcd]# ./etcdctl get /coreos.com/network/config
{"Network": "172.6.0.0/16", "Backend": {"Type": "host-gw"}}
7）启动服务并检查
[root@szdc0-21 etcd]# supervisorctl update
flanneld-0-21: added process group
[root@szdc0-21 etcd]# supervisorctl status
etcd-server-0-21 RUNNING pid 1305, uptime 4:54:00
flanneld-0-21 RUNNING pid 33440, uptime 0:03:22
kube-apiserver-0-21 RUNNING pid 1462, uptime 4:05:06
kube-controller-manager-0-21 RUNNING pid 1552, uptime 3:09:12
kube-kubelet-0-21 RUNNING pid 1801, uptime 2:08:46
kube-proxy-0-21 RUNNING pid 11937, uptime 1:18:31
kube-scheduler-0-21 RUNNING pid 1581, uptime 2:51:45
[root@szdc0-22 flannel]# supervisorctl update
flanneld-0-22: added process group
[root@szdc0-22 flannel]# supervisorctl status
etcd-server-0-22 RUNNING pid 3245, uptime 5:10:18
flanneld-0-22 RUNNING pid 35469, uptime 0:01:50
kube-apiserver-0-22 RUNNING pid 3361, uptime 3:57:50
kube-controller-manager-0-22 RUNNING pid 3435, uptime 3:11:25
kube-kubelet-0-22 RUNNING pid 4021, uptime 2:07:54
kube-proxy-0-22 RUNNING pid 14293, uptime 1:16:22
kube-scheduler-0-22 RUNNING pid 3459, uptime 2:53:58
8）验证集群，pod之间网络互通
[root@szdc0-21 ~]# kubectl apply -f /root/nginx-ds.yaml
daemonset.extensions/nginx-ds created
[root@szdc0-21 ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ds-7h72v 1/1 Running 0 18s 172.6.21.2 szdc0-21.host.com <none> <none>
nginx-ds-d28bq 1/1 Running 0 18s 172.6.22.2 szdc0-22.host.com <none> <none>
[root@szdc0-21 ~]# kubectl exec -it nginx-ds-7h72v /bin/bash
root@nginx-ds-7h72v:/# ping 172.6.22.2
PING 172.6.22.2 (172.6.22.2): 48 data bytes
56 bytes from 172.6.22.2: icmp_seq=0 ttl=62 time=0.445 ms
56 bytes from 172.6.22.2: icmp_seq=1 ttl=62 time=1.298 ms
[root@szdc0-22 flannel]# kubectl exec -it nginx-ds-d28bq /bin/bash
root@nginx-ds-d28bq:/# ping 172.6.21.2
PING 172.6.21.2 (172.6.21.2): 48 data bytes
56 bytes from 172.6.21.2: icmp_seq=0 ttl=62 time=0.824 ms
56 bytes from 172.6.21.2: icmp_seq=1 ttl=62 time=0.845 ms
[root@szdc0-21 ~]# ping 172.6.21.2
PING 172.6.21.2 (172.6.21.2) 56(84) bytes of data.
64 bytes from 172.6.21.2: icmp_seq=1 ttl=64 time=0.049 ms
[root@szdc0-21 ~]# ping 172.6.22.2
PING 172.6.22.2 (172.6.22.2) 56(84) bytes of data.
64 bytes from 172.6.22.2: icmp_seq=1 ttl=63 time=0.346 ms
[root@szdc0-22 ~]# ping 172.6.21.2
PING 172.6.21.2 (172.6.21.2) 56(84) bytes of data.
64 bytes from 172.6.21.2: icmp_seq=1 ttl=63 time=0.291 ms
[root@szdc0-22 ~]# ping 172.6.22.2
PING 172.6.22.2 (172.6.22.2) 56(84) bytes of data.
64 bytes from 172.6.22.2: icmp_seq=1 ttl=64 time=0.043 ms
为什么不通宿主机pod能相互通信？
[root@szdc0-21 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.0.254 0.0.0.0 UG 0 0 0 eth0
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
172.6.21.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0
172.6.22.0 10.0.0.22 255.255.255.0 UG 0 0 0 eth0
[root@szdc0-22 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.0.254 0.0.0.0 UG 0 0 0 eth0
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
172.6.21.0 10.0.0.21 255.255.255.0 UG 0 0 0 eth0
172.6.22.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0
本质上是添加了路由规则：
[root@szdc0-21 flannel]# route add -net 172.6.22.0/24 gw 10.0.0.22 dev eth0
[root@szdc0-22 flannel]# route add -net 172.6.21.0/24 gw 10.0.0.21 dev eth0
9）在各个节点上优化iptables规则
现在默认pod之间访问走原地址NAT，即访问显示的是宿主机的ip，需要优化为显示pod的ip地址
# 安装iptables
[root@szdc0-21 ~]# yum install iptables-services -y
[root@szdc0-21 ~]# systemctl start iptables.service && systemctl enable iptables.service
优化szdc0-21主机：
[root@szdc0-21 ~]# iptables-save|grep -i postrouting
:POSTROUTING ACCEPT [5:303]
:KUBE-POSTROUTING - [0:0]
-A POSTROUTING -m comment --comment "kubernetes postrouting rules" -j KUBE-POSTROUTING
-A POSTROUTING -s 172.6.21.0/24 ! -o docker0 -j MASQUERADE
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -m mark --mark 0x4000/0x4000 -j MASQUERADE
# 先删除原先的规则
[root@szdc0-21 ~]# iptables -t nat -D POSTROUTING -s 172.6.21.0/24 ! -o docker0 -j MASQUERADE
# 10.0.0.21主机上的，来源是172.6.21.0/24段的docker的ip，目标ip不是172.6.0.0/16段，网络发包不从docker0桥设备出站的，才进行转换
[root@szdc0-21 ~]# iptables -t nat -I POSTROUTING -s 172.6.21.0/24 ! -d 172.6.0.0/16 ! -o docker0 -j MASQUERADE
[root@szdc0-21 ~]# iptables-save|grep -i postrouting
:POSTROUTING ACCEPT [0:0]
:KUBE-POSTROUTING - [0:0]
-A POSTROUTING -s 172.6.21.0/24 ! -d 172.6.0.0/16 ! -o docker0 -j MASQUERADE
-A POSTROUTING -m comment --comment "kubernetes postrouting rules" -j KUBE-POSTROUTING
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -m mark --mark 0x4000/0x4000 -j MASQUERADE
# 把默认禁止规则删掉
[root@szdc0-21 ~]# iptables-save | grep -i reject
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
[root@szdc0-21 ~]# iptables -t filter -D INPUT -j REJECT --reject-with icmp-host-prohibited
[root@szdc0-21 ~]# iptables -t filter -D FORWARD -j REJECT --reject-with icmp-host-prohibited
[root@szdc0-21 ~]# iptables-save > /etc/sysconfig/iptables
[root@szdc0-21 ~]# service iptables save
iptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ]
优化szdc0-22主机：
[root@szdc0-22 ~]# iptables-save|grep -i postrouting
:POSTROUTING ACCEPT [4:240]
:KUBE-POSTROUTING - [0:0]
-A POSTROUTING -m comment --comment "kubernetes postrouting rules" -j KUBE-POSTROUTING
-A POSTROUTING -s 172.6.22.0/24 ! -o docker0 -j MASQUERADE
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -m mark --mark 0x4000/0x4000 -j MASQUERADE
# 先删除原先的规则
[root@szdc0-22 ~]# iptables -t nat -D POSTROUTING -s 172.6.22.0/24 ! -o docker0 -j MASQUERADE
# 10.0.0.22主机上的，来源是172.6.22.0/24段的docker的ip，目标ip不是172.6.0.0/16段，网络发包不从docker0桥设备出站的，才进行转换
[root@szdc0-22 ~]# iptables -t nat -I POSTROUTING -s 172.6.22.0/24 ! -d 172.6.0.0/16 ! -o docker0 -j MASQUERADE
[root@szdc0-22 ~]# iptables-save|grep -i postrouting
:POSTROUTING ACCEPT [2:120]
:KUBE-POSTROUTING - [0:0]
-A POSTROUTING -s 172.6.22.0/24 ! -d 172.6.0.0/16 ! -o docker0 -j MASQUERADE
-A POSTROUTING -m comment --comment "kubernetes postrouting rules" -j KUBE-POSTROUTING
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -m mark --mark 0x4000/0x4000 -j MASQUERADE
# 把默认禁止规则删掉
[root@szdc0-22 ~]# iptables-save | grep -i reject
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
[root@szdc0-22 ~]# iptables -t filter -D INPUT -j REJECT --reject-with icmp-host-prohibited
[root@szdc0-22 ~]# iptables -t filter -D FORWARD -j REJECT --reject-with icmp-host-prohibited
[root@szdc0-22 ~]# iptables-save > /etc/sysconfig/iptables
[root@szdc0-22 ~]# service iptables save
iptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ]
测试：
[root@szdc0-21 ~]# vim nginx-ds.yaml
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: nginx-ds
spec:
template:
metadata:
labels:
app: nginx-ds
spec:
containers:
- name: my-nginx
image: harbor.od.com/public/nginx:curl
command: ["nginx","-g","daemon off;"]
ports:
- containerPort: 80
[root@szdc0-21 ~]# kubectl apply -f nginx-ds.yaml
[root@szdc0-21 ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ds-5782b 1/1 Running 0 5s 172.6.22.2 szdc0-22.host.com <none> <none>
nginx-ds-lbxlb 1/1 Running 0 5s 172.6.21.2 szdc0-21.host.com <none> <none>
# 进入一个容器，使用curl命令，curl另一个容器ip，打开另一个终端，查看容器日志
[root@szdc0-21 ~]# kubectl exec -it nginx-ds-lbxlb /bin/bash
root@nginx-ds-lbxlb:/# curl 172.6.22.2
[root@szdc0-22 ~]# kubectl logs -f nginx-ds-5782b
10.0.0.21 - - [24/Apr/2021:12:07:24 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.38.0" "-" # 没优化之前
172.6.21.2 - - [24/Apr/2021:12:10:39 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.38.0" "-" # 优化之后
十二、部署服务发现插件–coredns
12.1、部署K8S的内网资源配置清单http服务
在运维主机上，配置一个nginx虚拟主机，用以提供k8s统一资源配置清单访问入口
1）配置nginx
[root@szdc0-200 ~]# vim /etc/nginx/conf.d/k8s-yaml.od.com.conf
server {
listen 80;
server_name k8s-yaml.od.com;
location / {
autoindex on;
default_type text/plain;
root /data/k8s-yaml;
}
}
[root@szdc0-200 ~]# mkdir -p /data/k8s-yaml/coredns
[root@szdc0-200 ~]# nginx -t
[root@szdc0-200 ~]# nginx -s reload
以后所有的资源配置清单统一放置在运维主机上的/data/k8s-yaml目录即可
2）配置内网DNS解析
# 注意序列号前滚
[root@szdc0-11 ~]# vim /var/named/od.com.zone
k8s-yaml A 10.0.0.200
[root@szdc0-11 ~]# named-checkconf
[root@szdc0-11 ~]# systemctl restart named
[root@szdc0-11 ~]# dig -t A k8s-yaml.od.com @10.0.0.11 +short
10.0.0.200
12.2、部署coredns
coredns官方github地址：https://github.com/coredns/coredns
coredns官方dockerhub地址：https://hub.docker.com/r/coredns/coredns
1）准备coredns镜像
[root@szdc0-200 ~]# docker pull coredns/coredns:1.6.1
[root@szdc0-200 ~]# docker images|grep coredns
coredns/coredns 1.6.1 c0f6e815079e 21 months ago 42.2MB
[root@szdc0-200 ~]# docker tag c0f6e815079e harbor.od.com/public/coredns:v1.6.1
[root@szdc0-200 ~]# docker push harbor.od.com/public/coredns:v1.6.1
2）准备资源配置清单
# 创建资源配置清单目录
[root@szdc0-200 ~]# mkdir -p /data/k8s-yaml/coredns && cd /data/k8s-yaml/coredns/
rbac资源配置文件：rbac.yaml：
apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
labels:
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
addonmanager.kubernetes.io/mode: Reconcile
name: system:coredns
rules:
- apiGroups:
- ""
resources:
- endpoints
- services
- pods
- namespaces
verbs:
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
addonmanager.kubernetes.io/mode: EnsureExists
name: system:coredns
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:coredns
subjects:
- kind: ServiceAccount
name: coredns
namespace: kube-system
configmap资源配置文件：cm.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
data:
Corefile: |
.:53 {
errors
log
health
ready
kubernetes cluster.local 10.96.0.0/22
forward . 192.168.6.241
cache 30
loop
reload
loadbalance
}
Deployment资源配置文件：dp.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: coredns
kubernetes.io/name: "CoreDNS"
spec:
replicas: 1
selector:
matchLabels:
k8s-app: coredns
template:
metadata:
labels:
k8s-app: coredns
spec:
priorityClassName: system-cluster-critical
serviceAccountName: coredns
containers:
- name: coredns
image: harbor.od.com/public/coredns:v1.6.1
args:
- -conf
- /etc/coredns/Corefile
volumeMounts:
- name: config-volume
mountPath: /etc/coredns
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
- containerPort: 9153
name: metrics
protocol: TCP
livenessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
initialDelaySeconds: 60
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 5
dnsPolicy: Default
volumes:
- name: config-volume
configMap:
name: coredns
items:
- key: Corefile
path: Corefile
Service资源配置文件：svc.yaml
apiVersion: v1
kind: Service
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: coredns
kubernetes.io/cluster-service: "true"
kubernetes.io/name: "CoreDNS"
spec:
selector:
k8s-app: coredns
clusterIP: 10.96.0.2
ports:
- name: dns
port: 53
protocol: UDP
- name: dns-tcp
port: 53
- name: metrics
port: 9153
protocol: TCP
3）依次执行创建
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/coredns/rbac.yaml
serviceaccount/coredns created
clusterrole.rbac.authorization.k8s.io/system:coredns created
clusterrolebinding.rbac.authorization.k8s.io/system:coredns created
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/coredns/cm.yaml
configmap/coredns created
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/coredns/dp.yaml
deployment.apps/coredns created
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/coredns/svc.yaml
service/coredns created
4）查看
[root@szdc0-21 ~]# kubectl get all -n kube-system
NAME READY STATUS RESTARTS AGE
pod/coredns-6b6c4f9648-c6mdg 1/1 Running 0 59s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/coredns ClusterIP 10.96.0.2 <none> 53/UDP,53/TCP,9153/TCP 51s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/coredns 1/1 1 1 59s
NAME DESIRED CURRENT READY AGE
replicaset.apps/coredns-6b6c4f9648 1 1 1 59s
[root@szdc0-21 ~]# kubectl create deployment nginx-dp --image=harbor.od.com/public/nginx:v1.7.9 -n kube-public
deployment.apps/nginx-dp created
[root@szdc0-21 ~]# kubectl expose deployment nginx-dp --port=80 -n kube-public
service/nginx-dp exposed
[root@szdc0-21 ~]# kubectl get service -n kube-public
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
nginx-dp ClusterIP 10.96.3.94 <none> 80/TCP 9s
[root@szdc0-21 ~]# dig -t A nginx-dp.kube-public.svc.cluster.local. @10.96.0.2 +short
10.96.3.94
十三、部署服务暴露插件–traefik
K8S的DNS实现了服务在集群“内”被自动发现，那如何是的服务在K8S集群外被使用和访问呢？
- 使用
NodePort型的Service：无法使用kube-proxy的ipvs模型，只能使用iptables模型 - 使用
Ingress资源：Ingress只能调度并暴露7层应用，特指http和https协议
traefik官方github地址：https://github.com/traefik/traefik
traefik官方dockerhub地址：https://hub.docker.com/_/traefik
1）准备traefik镜像
[root@szdc0-200 ~]# docker pull traefik:v1.7.2-alpine
[root@szdc0-200 ~]# docker images|grep traefik
traefik v1.7.2-alpine add5fac61ae5 2 years ago 72.4MB
[root@szdc0-200 ~]# docker tag add5fac61ae5 harbor.od.com/public/traefik:v1.7.2
[root@szdc0-200 ~]# docker push harbor.od.com/public/traefik:v1.7.2
2）准备资源配置清单
# 创建资源配置清单文件
[root@szdc0-200 ~]# mkdir -p /data/k8s-yaml/traefik/ && cd /data/k8s-yaml/traefik/
rbac.yaml：
apiVersion: v1
kind: ServiceAccount
metadata:
name: traefik-ingress-controller
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
name: traefik-ingress-controller
rules:
- apiGroups:
- ""
resources:
- services
- endpoints
- secrets
verbs:
- get
- list
- watch
- apiGroups:
- extensions
resources:
- ingresses
verbs:
- get
- list
- watch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: traefik-ingress-controller
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: traefik-ingress-controller
subjects:
- kind: ServiceAccount
name: traefik-ingress-controller
namespace: kube-system
ds.yaml：
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: traefik-ingress
namespace: kube-system
labels:
k8s-app: traefik-ingress
spec:
template:
metadata:
labels:
k8s-app: traefik-ingress
name: traefik-ingress
spec:
serviceAccountName: traefik-ingress-controller
terminationGracePeriodSeconds: 60
containers:
- image: harbor.od.com/public/traefik:v1.7.2
name: traefik-ingress
ports:
- name: controller
containerPort: 80
hostPort: 81
- name: admin-web
containerPort: 8080
securityContext:
capabilities:
drop:
- ALL
add:
- NET_BIND_SERVICE
args:
- --api
- --kubernetes
- --logLevel=INFO
- --insecureskipverify=true
- --kubernetes.endpoint=https://10.0.0.10:7443
- --accesslog
- --accesslog.filepath=/var/log/traefik_access.log
- --traefiklog
- --traefiklog.filepath=/var/log/traefik.log
- --metrics.prometheus
svc.yaml：
kind: Service
apiVersion: v1
metadata:
name: traefik-ingress-service
namespace: kube-system
spec:
selector:
k8s-app: traefik-ingress
ports:
- protocol: TCP
port: 80
name: controller
- protocol: TCP
port: 8080
name: admin-web
ingress.yaml：
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: traefik-web-ui
namespace: kube-system
annotations:
kubernetes.io/ingress.class: traefik
spec:
rules:
- host: traefik.od.com
http:
paths:
- path: /
backend:
serviceName: traefik-ingress-service
servicePort: 8080
3）依次执行创建
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/traefik/rbac.yaml
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/traefik/ds.yaml
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/traefik/svc.yaml
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/traefik/ingress.yaml
[root@szdc0-21 ~]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
coredns-6b6c4f9648-c6mdg 1/1 Running 0 39m 172.6.21.2 szdc0-21.host.com <none> <none>
traefik-ingress-9fjk7 1/1 Running 0 3m37s 172.6.22.3 szdc0-22.host.com <none> <none>
traefik-ingress-b9btp 1/1 Running 0 3m37s 172.6.21.3 szdc0-21.host.com <none> <none>
[root@szdc0-21 ~]# kubectl get svc -n kube-system -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
coredns ClusterIP 10.96.0.2 <none> 53/UDP,53/TCP,9153/TCP 39m k8s-app=coredns
traefik-ingress-service ClusterIP 10.96.1.192 <none> 80/TCP,8080/TCP 3m45s k8s-app=traefik-ingress
[root@szdc0-21 ~]# kubectl get all -n kube-system
NAME READY STATUS RESTARTS AGE
pod/coredns-6b6c4f9648-c6mdg 1/1 Running 0 45m
pod/traefik-ingress-9fjk7 1/1 Running 0 9m58s
pod/traefik-ingress-b9btp 1/1 Running 0 9m58s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/coredns ClusterIP 10.96.0.2 <none> 53/UDP,53/TCP,9153/TCP 45m
service/traefik-ingress-service ClusterIP 10.96.1.192 <none> 80/TCP,8080/TCP 9m50s
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE
daemonset.apps/traefik-ingress 2 2 2 2 2 <none> 9m58s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/coredns 1/1 1 1 45m
NAME DESIRED CURRENT READY AGE
replicaset.apps/coredns-6b6c4f9648 1 1 1 45m
4）解析域名
# 注意序列号前滚
[root@szdc0-11 ~]# vim /var/named/od.com.zone
traefik A 10.0.0.10
[root@szdc0-11 ~]# named-checkconf
[root@szdc0-11 ~]# systemctl restart named
5）配置反向代理
需要在szdc0-11和szdc0-12上配置：
[root@szdc0-11 ~]# vim /etc/nginx/conf.d/od.com.conf
upstream default_backend_traefik {
server 10.0.0.21:81 max_fails=3 fail_timeout=10s;
server 10.0.0.22:81 max_fails=3 fail_timeout=10s;
}
server {
server_name *.od.com;
location / {
proxy_pass http://default_backend_traefik;
proxy_set_header Host $http_host;
proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for;
}
}
[root@szdc0-11 ~]# nginx -t
[root@szdc0-11 ~]# nginx -s reload
6）浏览器访问
十四、部署GUI资源管理插件-dashboard
github地址：https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dashboard
下载地址：https://github.com/kubernetes/dashboard/releases
dockerhub地址：https://registry.hub.docker.com/r/kubernetesui/dashboard/
1）准备dashboard镜像
[root@szdc0-200 ~]# docker pull sunrisenan/kubernetes-dashboard-amd64:v1.10.1
[root@szdc0-200 ~]# docker pull sunrisenan/kubernetes-dashboard-amd64:v1.8.3
[root@szdc0-200 ~]# docker images |grep dash
sunrisenan/kubernetes-dashboard-amd64 v1.10.1 f9aed6605b81 2 years ago 122MB
sunrisenan/kubernetes-dashboard-amd64 v1.8.3 0c60bcf89900 3 years ago 102MB
[root@szdc0-200 ~]# docker tag f9aed6605b81 harbor.od.com/public/kubernetes-dashboard-amd64:v1.10.1
[root@szdc0-200 ~]# docker push harbor.od.com/public/kubernetes-dashboard-amd64:v1.10.1
[root@szdc0-200 ~]# docker tag 0c60bcf89900 harbor.od.com/public/kubernetes-dashboard-amd64:v1.8.3
[root@szdc0-200 ~]# docker push harbor.od.com/public/kubernetes-dashboard-amd64:v1.8.3
2）准备资源配置清单
# 创建目录
[root@szdc0-200 ~]# mkdir -p /data/k8s-yaml/dashboard && cd /data/k8s-yaml/dashboard
rbac.yaml：
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: kubernetes-dashboard
addonmanager.kubernetes.io/mode: Reconcile
name: kubernetes-dashboard-admin
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubernetes-dashboard-admin
namespace: kube-system
labels:
k8s-app: kubernetes-dashboard
addonmanager.kubernetes.io/mode: Reconcile
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard-admin
namespace: kube-system
dp.yaml：
apiVersion: apps/v1
kind: Deployment
metadata:
name: kubernetes-dashboard
namespace: kube-system
labels:
k8s-app: kubernetes-dashboard
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
spec:
selector:
matchLabels:
k8s-app: kubernetes-dashboard
template:
metadata:
labels:
k8s-app: kubernetes-dashboard
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ''
spec:
priorityClassName: system-cluster-critical
containers:
- name: kubernetes-dashboard
image: harbor.od.com/public/kubernetes-dashboard-amd64:v1.8.3
resources:
limits:
cpu: 100m
memory: 300Mi
requests:
cpu: 50m
memory: 100Mi
ports:
- containerPort: 8443
protocol: TCP
args:
# PLATFORM-SPECIFIC ARGS HERE
- --auto-generate-certificates
volumeMounts:
- name: tmp-volume
mountPath: /tmp
livenessProbe:
httpGet:
scheme: HTTPS
path: /
port: 8443
initialDelaySeconds: 30
timeoutSeconds: 30
volumes:
- name: tmp-volume
emptyDir: {}
serviceAccountName: kubernetes-dashboard-admin
tolerations:
- key: "CriticalAddonsOnly"
operator: "Exists"
svc.yaml：
apiVersion: v1
kind: Service
metadata:
name: kubernetes-dashboard
namespace: kube-system
labels:
k8s-app: kubernetes-dashboard
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
spec:
selector:
k8s-app: kubernetes-dashboard
ports:
- port: 443
targetPort: 8443
ingress.yaml：
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: kubernetes-dashboard
namespace: kube-system
annotations:
kubernetes.io/ingress.class: traefik
spec:
rules:
- host: dashboard.od.com
http:
paths:
- backend:
serviceName: kubernetes-dashboard
servicePort: 443
3）依次创建资源
浏览器打开：http://k8s-yaml.od.com/dashboard/检查资源配置清单文件是否正确创建
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/rbac.yaml
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/dp.yaml
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/svc.yaml
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/ingress.yaml
4）解析域名
# 注意前滚一个序列号
[root@szdc0-11 ~]# vim /var/named/od.com.zone
dashboard A 10.0.0.10
[root@szdc0-11 ~]# systemctl restart named
[root@szdc0-11 ~]# dig dashboard.od.com @10.96.0.2 +short
10.0.0.10
[root@szdc0-11 ~]# dig dashboard.od.com @10.0.0.11 +short
10.0.0.10
5）浏览器访问
浏览器访问：http://dashboard.od.com
6）配置https认证
签发证书
[root@szdc0-200 certs]# (umask 077; openssl genrsa -out dashboard.od.com.key 2048)
Generating RSA private key, 2048 bit long modulus
...........................................................+++
.........................................................................+++
e is 65537 (0x10001)
[root@szdc0-200 certs]# openssl req -new -key dashboard.od.com.key -out dashboard.od.com.csr -subj "/CN=dashboard.od.com/C=CN/ST=BJ/L=Beijing/O=OldboyEdu/OU=ops"
[root@szdc0-200 certs]# openssl x509 -req -in dashboard.od.com.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out dashboard.od.com.crt -days 3650
Signature ok
subject=/CN=dashboard.od.com/C=CN/ST=BJ/L=Beijing/O=OldboyEdu/OU=ops
Getting CA Private Key
[root@szdc0-200 certs]# ll dash*
-rw-r--r-- 1 root root 1196 Apr 25 15:15 dashboard.od.com.crt
-rw-r--r-- 1 root root 1005 Apr 25 15:14 dashboard.od.com.csr
-rw------- 1 root root 1675 Apr 25 15:14 dashboard.od.com.key
检查证书
[root@szdc0-200 certs]# cfssl-certinfo -cert dashboard.od.com.crt
{
"subject": {
"common_name": "dashboard.od.com",
"country": "CN",
"organization": "OldboyEdu",
"organizational_unit": "ops",
"locality": "Beijing",
"province": "BJ",
"names": [
"dashboard.od.com",
"CN",
"BJ",
"Beijing",
"OldboyEdu",
"ops"
]
},
"issuer": {
"common_name": "OldboyEdu",
"country": "CN",
"organization": "od",
"organizational_unit": "ops",
"locality": "beijing",
"province": "beijing",
"names": [
"CN",
"beijing",
"beijing",
"od",
"ops",
"OldboyEdu"
]
},
"serial_number": "10408511385517215812",
"not_before": "2021-04-25T07:15:06Z",
"not_after": "2031-04-23T07:15:06Z",
"sigalg": "SHA256WithRSA",
"authority_key_id": "",
"subject_key_id": "",
"pem": "-----BEGIN CERTIFICATE-----\nMIIDRTCCAi0CCQCQcnX1XlzQRDANBgkqhkiG9w0BAQsFADBgMQswCQYDVQQGEwJD\nTjEQMA4GA1UECBMHYmVpamluZzEQMA4GA1UEBxMHYmVpamluZzELMAkGA1UEChMC\nb2QxDDAKBgNVBAsTA29wczESMBAGA1UEAxMJT2xkYm95RWR1MB4XDTIxMDQyNTA3\nMTUwNloXDTMxMDQyMzA3MTUwNlowaTEZMBcGA1UEAwwQZGFzaGJvYXJkLm9kLmNv\nbTELMAkGA1UEBhMCQ04xCzAJBgNVBAgMAkJKMRAwDgYDVQQHDAdCZWlqaW5nMRIw\nEAYDVQQKDAlPbGRib3lFZHUxDDAKBgNVBAsMA29wczCCASIwDQYJKoZIhvcNAQEB\nBQADggEPADCCAQoCggEBAMmpin99sFKUmqE4g9Apvcxo4sJuvl5U0EtYpYGr/oYe\nK9h31cuYb4gzTgiOXJ2kuq83agw/qcj/vWwvu5CJrtAf5xHSsxhTMamvstEjgGOW\nWKQwhsIT1Pqx3BcRYP232mnAeXFKd9pug7dzQLu4/n3swtTuXOo9zsNhapI1UeYB\ngbZSyURbdeu4/O4McC3dSaCCon3hIHy7G3DImttvYmZgBgYsvN5uOk2AVz3/PSO4\nWGCfNEX8lamrGyc19x9m8UQS8dsmmY2dVOGMA+L8eeiOC+h1P3qmrOdW25ZpzY9s\nSjL/eq79htJd1ITpr8BBTgH2Fms7QMoN/hJKBg4uI2MCAwEAATANBgkqhkiG9w0B\nAQsFAAOCAQEAQk2BbPf4SOXM9XgLPD4pBtcvEd0W7aoLmGaLiWgUUs0upPpVeeTM\nAT951IDmxSToJsq6BBPFi8KdpoZ88jB35CB6QoTLhoA39jRoRly/l++oCyniKrgA\nrlmfWLeTUE99xdblrqOvYREE1FZwc+S8RfjeQg6OdIX3v3lYP4PBbF6r874DORIl\nsuirgXEJ4NdeuqtMP4j0hr8QN849/tBv6ID492GE0e/SKT2PTh2A74ODxE7jcZpp\n1FKN/OvrlVw3C9zohkgccZDkQE7YQu/YoyqwvlOIu/2hlt3cpZc2vtdqRlgyI2qG\nQwb62Pvjkf6cTWnGqZdoNKK6DoFeCWI5TQ==\n-----END CERTIFICATE-----\n"
}
配置nginx
# 在szdc0-11和szdc0-12上
~]# mkdir /etc/nginx/certs
~]# scp szdc0-200:/opt/certs/dashboard.od.com.crt /etc/nginx/certs/
~]# scp szdc0-200:/opt/certs/dashboard.od.com.key /etc/nginx/certs/
~]# vim /etc/nginx/conf.d/dashboard.od.com.conf
server {
listen 80;
server_name dashboard.od.com;
rewrite ^(.*)$ https://${server_name}$1 permanent;
}
server {
listen 443 ssl;
server_name dashboard.od.com;
ssl_certificate "certs/dashboard.od.com.crt";
ssl_certificate_key "certs/dashboard.od.com.key";
ssl_session_cache shared:SSL:1m;
ssl_session_timeout 10m;
ssl_ciphers HIGH:!aNULL:!MD5;
ssl_prefer_server_ciphers on;
location / {
proxy_pass http://default_backend_traefik;
proxy_set_header Host $http_host;
proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for;
}
}
[root@szdc0-11 ~]# nginx -t
[root@szdc0-11 ~]# nginx -s reload
7）获取kubernetes-dashboard-admin-token
[root@szdc0-21 ~]# kubectl get secrets -n kube-system
NAME TYPE DATA AGE
coredns-token-n8k78 kubernetes.io/service-account-token 3 5h9m
default-token-btk2d kubernetes.io/service-account-token 3 23h
kubernetes-dashboard-admin-token-h4g65 kubernetes.io/service-account-token 3 32m
kubernetes-dashboard-key-holder Opaque 2 32m
traefik-ingress-controller-token-xpklk kubernetes.io/service-account-token 3 3h52m
[root@szdc0-21 ~]# kubectl describe secret kubernetes-dashboard-admin-token-w46s2 -n kube-system | grep token
Error from server (NotFound): secrets "kubernetes-dashboard-admin-token-w46s2" not found
[root@szdc0-21 ~]# kubectl describe secret kubernetes-dashboard-admin-token-h4g65 -n kube-system | grep token
Name: kubernetes-dashboard-admin-token-h4g65
Type: kubernetes.io/service-account-token
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.HKz4jTjq7E6fkOxgNGeh7qx29zq8cF7iDQzTcC_M_6yfAJ8n0Fd7n9F0VAmQ2qc9jjKaMLeWG-NnGW4EhZ7njxAllxnXT-WVba0RvlyBl16C_X_oaxtBqcC4x3pkx1rfihWL_kFmQvedvttNbr_SdlP3DpER3jKUaVwjw0EfsmM4bchmbXILXYVM8y2FtQrguo6ZqxG7w-dMby_5VBkMCgF5bOEhwUZStwPCNccFFoa8MduqBGXIpunCzYqduy3QiJdN9xbCFQADomDD90tc9lncHUOyR3mvdGGBNjxYM2r1i_AaI__Pe_KAKhNkqMFq8hfez2P17n5x9Rzb8O_rbg
8）验证token登录
十五、部署heapster
1）准备heapster镜像
[root@szdc0-200 ~]# docker pull sunrisenan/heapster:v1.5.4
[root@szdc0-200 ~]# docker images|grep heapster
sunrisenan/heapster v1.5.4 c359b95ad38b 2 years ago 136MB
[root@szdc0-200 ~]# docker tag c359b95ad38b harbor.od.com/public/heapster:v1.5.4
[root@szdc0-200 ~]# docker push harbor.od.com/public/heapster:v1.5.4
2）准备资源配置清单
[root@szdc0-200 ~]# mkdir -p /data/k8s-yaml/heapster && cd /data/k8s-yaml/heapster
rbac.yaml：
apiVersion: v1
kind: ServiceAccount
metadata:
name: heapster
namespace: kube-system
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: heapster
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:heapster
subjects:
- kind: ServiceAccount
name: heapster
namespace: kube-system
dp.yaml：
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: heapster
namespace: kube-system
spec:
replicas: 1
template:
metadata:
labels:
task: monitoring
k8s-app: heapster
spec:
serviceAccountName: heapster
containers:
- name: heapster
image: harbor.od.com/public/heapster:v1.5.4
imagePullPolicy: IfNotPresent
command:
- /opt/bitnami/heapster/bin/heapster
- --source=kubernetes:https://kubernetes.default
svc.yaml：
apiVersion: v1
kind: Service
metadata:
labels:
task: monitoring
# For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)
# If you are NOT using this as an addon, you should comment out this line.
kubernetes.io/cluster-service: 'true'
kubernetes.io/name: Heapster
name: heapster
namespace: kube-system
spec:
ports:
- port: 80
targetPort: 8082
selector:
k8s-app: heapster
3）应用资源配置清单
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/heapster/rbac.yaml
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/heapster/dp.yaml
[root@szdc0-21 ~]# kubectl apply -f http://k8s-yaml.od.com/heapster/svc.yaml
4）查看
[root@szdc0-21 ~]# kubectl top node
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY%
szdc0-21.host.com 97m 4% 756Mi 19%
szdc0-22.host.com 81m 4% 643Mi 16%
[root@szdc0-21 ~]# kubectl top pod -n kube-public
NAME CPU(cores) MEMORY(bytes)
nginx-dp-5dfc689474-5qjts 0m 1Mi
作者：Lawrence
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