kubernetes二进制部署（HA）

Kubernetes 企业级部署实战

环境

角色	主机名	内网IP	集群IP	操作系统	服务
BIND&&Proxy	HDSS7-11	10.0.0.11	-	CentOS7.6	DNS Nginx
etcd-node&&Proxy	HDSS7-12	10.0.0.12	-	CentOS7.6	etcd nginx
k8s-node	HDSS7-21	10.0.0.21	-	CentOS7.6	etcd,k8s-master k8s-node
k8s-node	HDSS7-22	10.0.0.22	-	CentOS7.6	etcd,k8s-master k8s-node
registry&&Storge	HDSS7-200	10.0.0.200	-	CentOS7.6	harbor NFS CA

全部服务器关闭 firewalld 和 selinux，禁用 swap，部署机(master200)可免密 ssh 登陆其他服务器
软件版本
- CentOS: 7.6
- Bind: 9
- etcd: 3.1.20
- docker-ce: 19.03
- harbor: 1.9.1
- flannel: 0.11.0
- kubernetes: 1.15.2
k8s牵扯到多个网段，这里说明下
- 10.0.0.0/24 该网段是服务器物理网卡 IP 地址段，通过该地址访问互联网
- 10.254.0.0/16 该网段是杜撰的，分配至 k8s service 的 clusterIP
- 172.7.0.0/16 该网段是杜撰的，是 k8s pod 的 IP 地址区间，用于区别流量来源

yum install wget net-tools telnet tree nmap sysstat lrzsz dos2unix bind-utils -y

部署DNS服务

在hdss7-11上安装Bind、
```
[root@hdss7-11 ~]# yum install -y bind
```

配置bind

[root@hdss7-11 ~]# vi /etc/named.conf            # BIND进程的工作属性，区域的定义
13         listen-on port 53 { 10.0.0.11; };    # 监听本机IP
14         listen-on-v6 port 53 { ::1; };        # 删除，不监听IPV6
20         allow-query     { any; };            # 允许所有主机查看
21         forwarders      { 10.0.0.254; };        # 办公网上一级的DNS
33         recursion yes;                # dns采用递归的查询
35         dnssec-enable no;                # 关闭，节省资源（生产可能不需要关闭）
36         dnssec-validation no;            # 关闭，节省资源，不做互联网认证

检查配置文件是否正确
```
[root@hdss7-11 ~]# named-checkconf
```
配置区域配置文件
```
[root@hdss7-11 ~]# vim /etc/named.rfc1912.zones
zone "host.com" IN {
```
  type master;
  file "host.com.zone";
  allow-update { 10.0.0.11; };
```
};

zone "od.com" {
type master;
file "od.com.zone";
allow-update { 10.0.0.11; };
};


* 配置区域数据文件

[root@hdss7-11 ~]# vim /var/named/host.com.zone

```
$ORIGIN host.com.
$TTL 600        ; 10 minutes
@       IN SOA  dns.host.com. dnsadmin.host.com. (
                                2019121001 ; 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
HDSS7-11           A    10.0.0.11
HDSS7-12           A    10.0.0.12
HDSS7-21           A    10.0.0.21
HDSS7-22           A    10.0.0.22
HDSS7-200          A    10.0.0.200

[root@hdss7-11 ~]# vim /var/named/od.com.zone

$ORIGIN od.com.
$TTL 600        ; 10 minutes
@               IN SOA  dns.od.com. dnsadmin.od.com. (
                                2019121001 ; 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

验证解析

[root@hdss7-11 ~]# dig hdss7-21.host.com +short
10.0.0.21

更改客户端dns

[root@hdss7-11 ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33 
DNS1=10.0.0.11

更改所有主机的DNS，重启网卡
```
# vim /etc/sysconfig/network-scripts/ifcfg-ens33 
DNS1=10.0.0.11
```
建议不在网卡配置中声明DNS1 重启网络服务会影响resolv.conf文件中某些配置
添加主机域search host.com使用短域名与DNS服务器地址
```
[root@hdss7-200 ~]# cat /etc/resolv.conf
search host.com
nameserver 10.0.0.11
```
准备签发证书环境

运维主机HDSS7-200.host.coms上
安装CFSSL
- 证数签发工具CFSSL：R1.2
  - cfssl下载地址：https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O /usr/bin/cfssl
  - cfsslhson下载地址：https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O /usr/bin/cfssl-json
  - cfssl-certinfo下载地址：https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/bin/cfssl-certinfo

下载文件到本地主机上

[root@hdss7-200 ~]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O /usr/bin/cfssl
[root@hdss7-200 ~]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O /usr/bin/cfssl-json
[root@hdss7-200 ~]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/bin/cfssl-certinfo
[root@hdss7-200 ~]# chmod +x /usr/bin/cfssl*
[root@hdss7-200 ~]# which cfssl-certinfo    
/usr/bin/cfssl-certinfo

签发证书

[root@hdss7-200 ~]# cd /opt/
[root@hdss7-200 opt]# mkdir certs
[root@hdss7-200 opt]# cd certs/
[root@hdss7-200 certs]# vi /opt/certs/ca-csr.json
{
  "CN": "OldboyEdu",        # 机构名称，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，浏览器使用该字段验证网站是否合法
  "hosts": [    
  ],
  "key": {            
      "algo": "rsa",        # 算法
      "size": 2048        # 长度
  },
  "names": [
      {
          "C": "CN",        # C，国家
          "ST": "beijing",    # ST 州，省
          "L": "beijing",    # L 地区 城市
          "O": "od",        # O 组织名称，公司名称
          "OU": "ops"        # OU 组织单位名称，公司部门
      }
  ],
  "ca": {
      "expiry": "175200h"    # expiry 过期时间，任何证书都有过期时间.20年
  }
}

签发承载式证书

[root@hdss7-200 certs]# cfssl gencert -initca ca-csr.json | cfssl-json -bare ca
[root@hdss7-200 certs]# ll
总用量 16
-rw-r--r-- 1 root root  993 12月 10 11:54 ca.csr
-rw-r--r-- 1 root root  328 12月 10 11:53 ca-csr.json
-rw------- 1 root root 1679 12月 10 11:54 ca-key.pem    # 根证书的私钥
-rw-r--r-- 1 root root 1346 12月 10 11:54 ca.pem        # 根证书

部署docker环境

在node主机与运维主机上：21、22、200

[root@hdss7-200 ~]# curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
[root@hdss7-200 ~]# mkdir -p /etc/docker
[root@hdss7-200 ~]# mkdir -p /data/docker

[root@hdss7-200 ]# vi /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": "172.7.200.1/24",            # 定义k8s主机上k8s pod的ip地址网段
  "exec-opts": ["native.cgroupdriver=systemd"],
  "live-restore": true
}
[root@hdss7-200 ~]# systemctl start docker
[root@hdss7-200 ~]# systemctl enable docker


[root@hdss7-21 ~]# 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": "172.7.21.1/24",            
  "exec-opts": ["native.cgroupdriver=systemd"],
  "live-restore": true
}

[root@hdss7-21 ~]# systemctl start docker
[root@hdss7-21 ~]# systemctl enable docker

[root@hdss7-22 ~]# 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": "172.7.22.1/24",            
  "exec-opts": ["native.cgroupdriver=systemd"],
  "live-restore": true
}
[root@hdss7-22 ~]# systemctl start docker
[root@hdss7-22 ~]# systemctl enable docker

Harbor 搭建

安装1.7.6以上版本

[root@hdss7-200 ~]# cd /opt/
[root@hdss7-200 opt]# mkdir src
[root@hdss7-200 opt]# cd src/
[root@hdss7-200 src]# ls
harbor-offline-installer-v1.9.1.tgz
[root@hdss7-200 src]# tar -xf harbor-offline-installer-v1.9.1.tgz -C /opt/

把软件包做版本标识，创建一个软连接，便于后期的升级

[root@hdss7-200 src]# cd /opt
[root@hdss7-200 opt]# mv harbor/ harbor-v1.9.1
[root@hdss7-200 opt]# ln harbor-v1.9.1/ /opt/harbor
ln: ‘harbor-v1.9.1/’: hard link not allowed for directory
[root@hdss7-200 opt]# ln -s harbor-v1.9.1/ /opt/harbor
[root@hdss7-200 opt]# ll
total 0
drwxr-xr-x. 2 root root  71 Dec 12 16:21 certs
drwx--x--x. 4 root root  28 Dec 12 16:56 containerd
lrwxrwxrwx. 1 root root  14 Dec 12 17:20 harbor -> harbor-v1.9.1/
drwxr-xr-x. 2 root root 100 Dec 12 17:16 harbor-v1.9.1
drwxr-xr-x. 2 root root  49 Dec 12 17:14 src

编辑harbor文件

[root@hdss7-200 opt]# cd harbor
[root@hdss7-200 harbor]# vim harbor.yml
5 hostname: harbor.od.com
10   port: 180
27 harbor_admin_password: Harbor12345
40 data_volume: /data/harbor
87     location: /data/harbor/logs  # 更改日志存储路径
[root@hdss7-200 harbor]# mkdir -p /data/harbor/logs

docker编排工具

[root@hdss7-200 harbor]# yum install -y docker-compose
[root@hdss7-200 harbor]# rpm -qa docker-compose
docker-compose-1.18.0-4.el7.noarch
[root@hdss7-200 harbor]# ./install.sh 
[root@hdss7-200 harbor]# docker-compose ps
#每次docker重启需要执行
[root@hdss7-200 harbor]# docker-compose up -d
#安装nginx做反向代理
[root@hdss7-200 harbor]# yum install -y nginx
[root@hdss7-200 harbor]# 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;
  }
}
# 检测配置文件
[root@hdss7-200 harbor]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
[root@hdss7-200 harbor]# systemctl start nginx
[root@hdss7-200 harbor]# systemctl enable nginx

DNS服务器增加解析

[root@hdss7-11 ~]# vim /var/named/od.com.zone 
$ORIGIN od.com.
$TTL 600        ; 10 minutes
@               IN SOA  dns.od.com. dnsadmin.od.com. (
                              2019121002 ; 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
harbor             A    10.0.0.200
[root@hdss7-11 ~]# systemctl restart named    
# 验证解析
[root@hdss7-11 ~]# dig harbor.od.com +short
10.0.0.200

访问http://harbor.od.com
创建一个public项目，访问级别为公开

测试上传镜像

[root@hdss7-200 harbor]# docker pull nginx:1.15 
1.15: Pulling from library/nginx
743f2d6c1f65: Pull complete 
6bfc4ec4420a: Pull complete 
688a776db95f: Pull complete 
Digest: sha256:23b4dcdf0d34d4a129755fc6f52e1c6e23bb34ea011b315d87e193033bcd1b68
Status: Downloaded newer image for nginx:1.15
docker.io/library/nginx:1.15
[root@hdss7-200 harbor]# docker tag nginx:1.15 harbor.od.com/public/nginx:1.15
[root@hdss7-200 harbor]# 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@hdss7-200 harbor]# docker push harbor.od.com/public/nginx:1.15 
The push refers to repository [harbor.od.com/public/nginx]
332fa54c5886: Pushed 
6ba094226eea: Pushed 
6270adb5794c: Pushed 
1.15: digest: sha256:e770165fef9e36b990882a4083d8ccf5e29e469a8609bb6b2e3b47d9510e2c8d size: 948

部署etcd集群

集群规划

主机名	角色	IP
HDSS7-12.host.com	etcd lead	10.0.0.12
HDSS7-21.host.com	etcd follow	10.0.0.21
HDSS7-21.host.com	etcd follow	10.0.0.22

注：这里部署文档以HDSS7-12.host.com主机为例，另外一台运算节点安装部署方法类似

在HDss7-200上创建基于根证书的config配置文件 -- 此文件夹内有，直接上传，不需粘贴复制

[root@hdss7-200 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"
              ]
          }
      }
  }
}

IP地址根据实际情况填写，IP地址为有可能装ETCD的主机，多一个IP为预备，-- 此文件夹内有，直接上传，无需粘贴复制

[root@hdss7-200 certs]# vim /opt/certs/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"
        }
    ]
}

签发证书

[root@hdss7-200 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

在etcd主机上创建而etcd用户

[root@hdss7-12 ~]# useradd -s /sbin/nologin -M etcd
[root@hdss7-12 ~]# mkdir /opt/src
[root@hdss7-12 ~]# cd /opt/src/

下载etcd软件包，建议使用不超过3.3的版本

[root@hdss7-12 src]# wget https://github.com/etcd-io/etcd/releases/download/v3.1.20/etcd-v3.1.20-linux-amd64.tar.gz
[root@hdss7-12 src]# ls
etcd-v3.1.20-linux-amd64.tar.gz
[root@hdss7-12 src]# tar xfv etcd-v3.1.20-linux-amd64.tar.gz -C /opt/
[root@hdss7-12 opt]# mv etcd-v3.1.20-linux-amd64/ etcd-v3.1.20

创建软连接便于后期版本更新

[root@hdss7-12 opt]# ln -s /opt/etcd-v3.1.20 /opt/etcd
[root@hdss7-12 opt]# ll
total 0
lrwxrwxrwx. 1 root   root   17 Dec 12 20:05 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 Dec 12 20:04 src

创建目录，拷贝证书、私钥

[root@hdss7-12 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opt/etcd/certs目录中，私钥文件权限为600

[root@hdss7-12 opt]# cd /opt/etcd/certs/
[root@hdss7-12 certs]# scp hdss7-200:/opt/certs/ca.pem .
[root@hdss7-12 certs]# scp hdss7-200:/opt/certs/etcd-peer-key.pem .   
[root@hdss7-12 certs]# scp hdss7-200:/opt/certs/etcd-peer.pem .

更改属主组

[root@hdss7-12 certs]# chown -R etcd:etcd /opt/etcd/certs /data/etcd /data/logs/etcd-server
[root@hdss7-12 certs]# ll
total 12
-rw-r--r--. 1 etcd etcd 1346 Dec 12 20:11 ca.pem
-rw-------. 1 etcd etcd 1675 Dec 12 20:18 etcd-peer-key.pem
-rw-r--r--. 1 etcd etcd 1428 Dec 12 20:18 etcd-peer.pem

创建etcd服务启动脚本IP地址改为本机IP

[root@hdss7-12 certs]# vim /opt/etcd/etcd-server-startup.sh 
#!/bin/sh
./etcd --name etcd-server-7-12 \
     --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-7-12=https://10.0.0.12:2380,etcd-server-7-21=https://10.0.0.21:2380,etcd-server-7-22=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

赋予启动脚本执行权限

[root@hdss7-12 certs]# chmod +x /opt/etcd/etcd-server-startup.sh 
[root@hdss7-12 certs]# chown -R etcd:etcd /opt/etcd-v3.1.20/ /data/etcd/ /data/logs/etcd-server/

设置etcd后端运行

[root@hdss7-12 certs]# yum install supervisor -y
[root@hdss7-12 certs]# systemctl start supervisord
[root@hdss7-12 certs]# systemctl enable supervisord

更改supervisor配置文件:[program:etcd-server-7-12]名字根据实际修改

[root@hdss7-12 certs]# vim /etc/supervisord.d/etcd-server.ini
[program:etcd-server-7-12]
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)
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)
killallgroup=true
stopgroup=true

创建后端启动etcd

[root@hdss7-12 logs]# supervisorctl update
[root@hdss7-12 etcd]# supervisorctl status
etcd-server-7-12                 STARTING  
[root@hdss7-12 etcd]# supervisorctl status                  
etcd-server-7-12                 RUNNING   pid 30907, uptime 0:03:23

[root@hdss7-12 etcd]# netstat -luntp | grep etcd
tcp        0      0 10.0.0.12:2379          0.0.0.0:*               LISTEN      30908/./etcd        
tcp        0      0 127.0.0.1:2379          0.0.0.0:*               LISTEN      30908/./etcd        
tcp        0      0 10.0.0.12:2380          0.0.0.0:*               LISTEN      30908/./etcd

查看日志

[root@hdss7-12 etcd]# tail -n 100 /data/logs/etcd-server/etcd.stdout.log

三个etcd节点都起来后

[root@hdss7-12 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@hdss7-12 etcd]# ./etcdctl member list
6cbdd801d2c800d9: name=etcd-server-7-21 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-7-22 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-7-12 peerURLs=https://10.0.0.12:2380 clientURLs=http://127.0.0.1:2379,https://10.0.0.12:2379 isLeader=true

安装部署主控节点服务 -- apiserver

部署kube-apiserver集群

集群规划

主机名	角色	ip
HDSS7-21.host.com	kube-apiserver	10.0.0.21
HDSS7-22.host.com	kube-apiserver	10.0.0.22
HDSS7-11.host.com	4层负载均衡	10.0.0.11
HDSS7-12.host.com	4层负载均衡	10.0.0.12

注：这里192.168.153.11和192.168.153.12使用nginx做4层负载均衡器，用keepalive跑一个vip：192.168.153.10，代理两个kube-apiserver，实现高可用

注：这里部署文档以HDSS7-21.host.com主机为例，另外一台运算节点安装部署方法类似

下载软件，解压，创建软连接，安装k8s-v1.15.2

[root@hdss7-21 src]# cd /opt/src/
[root@hdss7-21 src]# ll
-rw-r--r--. 1 root root 443770238 Aug  6 15:31 kubernetes-server-linux-amd64-v1.15.2.tar.gz
[root@hdss7-21 src]# tar xf kubernetes-server-linux-amd64-v1.15.2.tar.gz -C /opt/
[root@hdss7-21 src]# cd /opt/
[root@hdss7-21 opt]# mv kubernetes/ kubernetes-v1.15.2
[root@hdss7-21 opt]# ln -s kubernetes-v1.15.2/ kubernetes
[root@hdss7-21 opt]# ll
total 0
drwx--x--x. 4 root root  28 Dec 12 16:46 containerd
lrwxrwxrwx. 1 root root  13 Dec 12 21:06 etcd -> etcd-v3.1.20/
drwxr-xr-x. 4 etcd etcd 166 Dec 12 21:44 etcd-v3.1.20
lrwxrwxrwx. 1 root root  19 Dec 12 22:33 kubernetes -> kubernetes-v1.15.2/
drwxr-xr-x. 4 root root  79 Aug  5 18:01 kubernetes-v1.15.2
drwxr-xr-x. 2 root root  97 Dec 12 22:30 src
[root@hdss7-21 opt]# cd kubernetes
[root@hdss7-21 kubernetes]# ls
addons  kubernetes-src.tar.gz  LICENSES  server

删除源码包

[root@hdss7-21 kubernetes]# rm -rf kubernetes-src.tar.gz

删除无用的文件docker镜像等

[root@hdss7-21 kubernetes]# cd server/bin/
[root@hdss7-21 bin]# rm -rf *.tar
[root@hdss7-21 bin]# rm -rf *_tag

剩余的可执行文件

[root@hdss7-21 bin]# ll
total 884636
-rwxr-xr-x. 1 root root  43534816 Aug  5 18:01 apiextensions-apiserver
-rwxr-xr-x. 1 root root 100548640 Aug  5 18:01 cloud-controller-manager
-rwxr-xr-x. 1 root root 200648416 Aug  5 18:01 hyperkube
-rwxr-xr-x. 1 root root  40182208 Aug  5 18:01 kubeadm
-rwxr-xr-x. 1 root root 164501920 Aug  5 18:01 kube-apiserver
-rwxr-xr-x. 1 root root 116397088 Aug  5 18:01 kube-controller-manager
-rwxr-xr-x. 1 root root  42985504 Aug  5 18:01 kubectl
-rwxr-xr-x. 1 root root 119616640 Aug  5 18:01 kubelet
-rwxr-xr-x. 1 root root  36987488 Aug  5 18:01 kube-proxy
-rwxr-xr-x. 1 root root  38786144 Aug  5 18:01 kube-scheduler
-rwxr-xr-x. 1 root root   1648224 Aug  5 18:01 mounter

签发apiserver-client证书：apiserver与etc通信的证书。apiserver是客户端，etcd是服务端

运维主机HDSS-200.host.com上

创建生成证书签名请求（csr）的JSON配置文件

[root@hdss7-200 certs]# vim client-csr.json
[root@hdss7-200 certs]# 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"
      }
  ]
}
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json | cfssl-json -bare client

创建签名请求（csr）的还送配置文件，apiserver,server端证书

[root@hdss7-200 certs]# vim apiserver-csr.json 
{
  "CN": "k8s-apiserver",
  "hosts": [
      "127.0.0.1",
      "10.254.0.1",
      "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",
      "10.0.0.23"
  ],
  "key": {
      "algo": "rsa",
      "size": 2048
  },
  "names": [
      {
          "C": "CN",
          "ST": "beijing",
          "L": "beijing",
          "O": "od",
          "OU": "ops"
      }
  ]
}
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json | cfssl-json -bare apiserver

拷贝证书

[root@hdss7-21 bin]# mkdir cert
[root@hdss7-21 bin]# cd cert/
最后有个点，表示拷贝到当前目录
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/ca.pem . 
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/ca-key.pem .
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/client.pem .
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/client-key.pem .
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/apiserver.pem .
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/apiserver-key.pem .

创建启动配置脚本可直接上传

[root@hdss7-21 cert]# cd ..
[root@hdss7-21 bin]# mkdir conf
[root@hdss7-21 bin]# cd conf/
[root@hdss7-21 config]# vi 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"

查看帮助命令，查看每行的意思

[root@hdss7-21 bin]# ./kube-apiserver --help|grep -A 5 target-ram-mb

编写启动脚本

[root@hdss7-21 conf]# 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 /opt/kubernetes/server/bin/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 10.254.0.0/16 \
--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

查看帮助

[root@hdss7-21 bin]# ./kube-apiserver --help|grep -A 5 target-ram-mb

添加执行权限

[root@hdss7-21 bin]# chmod +x kube-apiserver.sh

创建后台启动

[root@hdss7-21 bin]# vim /etc/supervisord.d/kube-apiserver.ini
[program:kube-apiserver-7-21]                                   # 21根据实际IP地址更改
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)
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)
killallgroup=true
stopgroup=true

[root@hdss7-21 bin]# mkdir -p /data/logs/kubernetes/kube-apiserver

[root@hdss7-21 bin]# supervisorctl update

kube-apiserver-7-21: added process group
[root@hdss7-21 bin]# netstat -luntp | grep kube-api
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      33042/./kube-apiser 
tcp6       0      0 :::6443                 :::*                    LISTEN      33042/./kube-apiser

L4反向代理apiserver保证高可用

hdss7-11 hdss7-12主机上部署nginx

[root@hdss7-11 ~]# yum install -y nginx
[root@hdss7-11 ~]# vim /etc/nginx/nginx.conf

# 末尾追加
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;
  }
}

[root@hdss7-11 ~]# systemctl start nginx
[root@hdss7-11 ~]# systemctl enable nginx

hdss7-11 hdss7-12主机上部署keeyalived

[root@hdss7-11 ~]# yum install keepalived -y

编写监听脚本

[root@hdss7-11 ~]# vi /etc/keepalived/check_port.sh

#!/bin/bash
#keepalived 监控端口脚本
#使用方法：
#在keepalived的配置文件中
#vrrp_script check_port {#创建一个vrrp_script脚本,检查配置
#    script "/etc/keepalived/check_port.sh 6379" #配置监听的端口
#    interval 2 #检查脚本的频率,单位（秒）
#}
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

配置keepalived
keepalived主

! 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 ens33    # 根据实际网卡更改
    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
    }
}

[root@hdss7-11 ~]# systemctl enable keepalived.service 
Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /usr/lib/systemd/system/keepalived.service.
[root@hdss7-11 ~]# systemctl start keepalived.service

keepalived从:

! Configuration File for keepalived
global_defs {
        router_id 10.0.0.12
    script_user root
        enable_script_security 
}
vrrp_script chk_nginx {
        script "/etc/keepalived/check_port.sh 7443"
        interval 2
        weight -20
}
vrrp_instance VI_1 {
        state BACKUP
        interface ens33        # 根据实际网卡更改
        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
        }
}

[root@hdss7-12 ~]# systemctl start keepalived.service 
[root@hdss7-12 ~]# systemctl enable keepalived.service

生产使用nopreempt参数指定非主占模式避免vip漂移到未完全恢复服务的主机，若vip出现变动，主keepalived恢复后，一定要确认主keepalived端口起来，服务搞好，重启keepalived，使vip变回主keepalived

[root@hdss7-11 ~]# netstat -luntp | grep 7443
tcp        0      0 0.0.0.0:7443            0.0.0.0:*               LISTEN      38902/nginx: master

安装部署主控节点控制器与调度服务

集群规划

主机名	角色	ip
HDSS7-21.host.com	controller-manager schedule	10.0.0.21
HDSS7-22.host.com	controller-manager schedule	10.0.0.22

注：这里部署文档以HDSS7-21.host.com主机为例，另外一台运算节点安装部署方法类似

部署kube-controller-manager

创建启动脚本：

[root@hdss7-21 bin]# vi /opt/kubernetes/server/bin/kube-controller-manager.sh

#!/bin/sh
./kube-controller-manager \
--cluster-cidr 172.7.0.0/16 \
--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 10.254.0.0/16 \
--root-ca-file ./cert/ca.pem \
--v 2

[root@hdss7-21 bin]# mkdir /data/logs/kubernetes/kube-controller-manager 
[root@hdss7-21 bin]# chmod +x kube-controller-manager.sh

添加后台启动

[root@hdss7-21 bin]# vi /etc/supervisord.d/kube-controller-manager.ini

[program:kube-controller-manager-7-21]
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)
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                                                       ; emit events on stdout writes (default false)
killallgroup=true
stopgroup=true

[root@hdss7-21 bin]# supervisorctl update                             
kube-controller-manager-7-21: added process group

部署kube-scheduler

创建启动脚本

[root@hdss7-21 bin]# vim /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

[root@hdss7-21 bin]# chmod +x /opt/kubernetes/server/bin/kube-scheduler.sh 
[root@hdss7-21 bin]# mkdir -p /data/logs/kubernetes/kube-scheduler

添加后台启动

[root@hdss7-21 bin]# vi /etc/supervisord.d/kube-scheduler.ini

[program:kube-scheduler-7-21]
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)
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)
killallgroup=true
stopgroup=true

[root@hdss7-21 bin]# supervisorctl update
kube-scheduler-7-21: added process group

[root@hdss7-22 config]# supervisorctl status
etcd-server-7-22                 RUNNING   pid 30591, uptime 18:59:07
kube-apiserver-7-22              RUNNING   pid 31033, uptime 16:42:23
kube-controller-manager-7-22     RUNNING   pid 33196, uptime 0:13:50
kube-scheduler-7-22              STARTING

查看集群节点状态

[root@hdss7-21 bin]# ln -s /opt/kubernetes/server/bin/kubectl /usr/bin/kubectl
[root@hdss7-21 bin]# which kubectl 
/usr/bin/kubectl
[root@hdss7-21 bin]# kubectl get cs
NAME                 STATUS    MESSAGE              ERROR
scheduler            Healthy   ok                   
controller-manager   Healthy   ok                   
etcd-2               Healthy   {"health": "true"}   
etcd-1               Healthy   {"health": "true"}   
etcd-0               Healthy   {"health": "true"}

部署Node节点服务

部署kubelet

集群规划

主机名	角色	ip
HDSS7-21.host.com	kubelet	10.0.0.21
HDSS7-22.host.com	kubelet	10.0.0.22

注：这里部署文档以HDSS7-21.host.com主机为例，另外一台运算节点安装部署方法类似

运维主机HDSS7-200.host.com

签发证书

创建生成证书签名请求（csr）的JSON配置文件

[root@hdss7-200 ~]# cd /opt/certs/
[root@hdss7-200 certs]# vi kubelet-csr.json
# 添加node节点IP，预先配置上可有能安装使用的IP，如果新node的ip不在证书内，需要重新编写证书，拷贝至所有主

{
  "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",
  "10.0.0.27",
  "10.0.0.28"
  ],
  "key": {
      "algo": "rsa",
      "size": 2048
  },
  "names": [
      {
          "C": "CN",
          "ST": "beijing",
          "L": "beijing",
          "O": "od",
          "OU": "ops"
      }
  ]
}

生成证书

[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server kubelet-csr.json | cfssl-json -bare kubelet

[root@hdss7-200 certs]# ll 
-rw-r--r--. 1 root root 1115 Dec 13 22:03 kubelet.csr
-rw-r--r--. 1 root root  452 Dec 13 22:02 kubelet-csr.json
-rw-------. 1 root root 1679 Dec 13 22:03 kubelet-key.pem
-rw-r--r--. 1 root root 1468 Dec 13 22:03 kubelet.pem
# 注意私钥文件权限属性600

分发证书到hdss7-21,hdss7-22

#拷贝证书、私钥，拷贝至：/opt/kubernetes/server/bin/cert/
[root@hdss7-21 ~]# cd /opt/kubernetes/server/bin/cert/
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/kubelet.pem .
root@hdss7-200's password: 
kubelet.pem                                   100% 1468     1.2MB/s   00:00    
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/kubelet-key.pem .

创建配置——set-cluster

只做一次，最后生成的 kubelet.kubeconfig 拷贝至其他节点，在conf目录下

[root@hdss7-21 cert]# cd /opt/kubernetes/server/bin/conf
[root@hdss7-21 conf]# 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
Cluster "myk8s" set.

创建配置——set-credentials

[root@hdss7-21 conf]# 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 
User "k8s-node" set.

创建配置——set-context

[root@hdss7-21 conf]# kubectl config set-context myk8s-context \
 --cluster=myk8s \
 --user=k8s-node \
 --kubeconfig=kubelet.kubeconfig
Context "myk8s-context" created.

创建配置——use-context

[root@hdss7-21 conf]# kubectl config use-context myk8s-context --kubeconfig=kubelet.kubeconfig
Switched to context "myk8s-context".

k8s-node.yaml 授予权限，角色绑定

[root@hdss7-21 conf]# vi 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
[root@hdss7-21 conf]# kubectl create -f k8s-node.yaml  
clusterrolebinding.rbac.authorization.k8s.io/k8s-node created

[root@hdss7-21 conf]# kubectl get clusterrolebinding k8s-node
[root@hdss7-21 conf]# kubectl get clusterrolebinding k8s-node -o yaml

HDSS7-22上:

HDSS-21上最后生成的 kubelet.kubeconfig 拷贝至其他节点

[root@hdss7-22 conf]# scp hdss7-21:/opt/kubernetes/server/bin/conf/kubelet.kubeconfig .

其它计算节点安装部署方法类似安装其他节点，需要先拷贝已安装节点的kubelet.kubeconfig

准备pause基础镜像 --sidecar模式

运维主机hdss7-200.host.com上：

下载

[root@hdss7-200 ~]# docker pull kubernetes/pause
Using default tag: latest
latest: Pulling from kubernetes/pause
4f4fb700ef54: Pull complete 
b9c8ec465f6b: Pull complete 
Digest: sha256:b31bfb4d0213f254d361e0079deaaebefa4f82ba7aa76ef82e90b4935ad5b105
Status: Downloaded newer image for kubernetes/pause:latest
docker.io/kubernetes/pause:latest

提交至私有仓库（harbor）中

[root@hdss7-200 ~]# docker images | grep pause
kubernetes/pause                latest                          f9d5de079539        5 years ago         240kB
[root@hdss7-200 ~]# docker tag f9d5de079539 harbor.od.com/public/pause:latest
[root@hdss7-200 ~]# docker push harbor.od.com/public/pause:latest

编写kubelet启动脚本 -- 注意更改主机名

[root@hdss7-21 conf]# vi /opt/kubernetes/server/bin/kubelet.sh

#!/bin/sh
./kubelet \
--anonymous-auth=false \
--cgroup-driver systemd \
--cluster-dns 10.254.0.2 \
--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 hdss7-21.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@hdss7-21 conf]# mkdir -p /data/logs/kubernetes/kube-kubelet /data/kubelet
[root@hdss7-21 conf]# chmod +x /opt/kubernetes/server/bin/kubelet.sh

添加后台启动

[root@hdss7-21 conf]# vi /etc/supervisord.d/kubelet.ini

[program:kube-kubelet-7-21]
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)
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)
killallgroup=true
stopgroup=true

查看运行状态

[root@hdss7-22 conf]# supervisorctl update
[root@hdss7-22 conf]# supervisorctl status
etcd-server-7-22                 RUNNING   pid 43905, uptime 0:11:26
kube-apiserver-7-22              RUNNING   pid 44498, uptime 0:09:30
kube-controller-manager-7-22     RUNNING   pid 44769, uptime 0:08:11
kube-kubelet-7-22                RUNNING   pid 47185, uptime 0:01:43
kube-scheduler-7-22              RUNNING   pid 44982, uptime 0:07:09

ROlES添加标签，设定节点角色，可同时加两个标签

[root@hdss7-21 cert]# kubectl label node hdss7-21.host.com node-role.kubernetes.io/master=
[root@hdss7-21 cert]# kubectl label node hdss7-21.host.com node-role.kubernetes.io/node=

[root@hdss7-21 cert]# kubectl get nodes
NAME                STATUS   ROLES         AGE     VERSION
hdss7-21.host.com   Ready    master,node   53m     v1.15.2
hdss7-22.host.com   Ready    master,node   6m27s   v1.15.2

部署kube-proxy

集群规划

主机名	角色	ip
HDSS7-21.host.com	kube-proxy	10.0.0.21
HDSS7-22.host.com	kube-proxy	10.0.0.22

注：这里部署文档以HDSS7-21.host.com主机为例，另外一台运算节点安装部署方法类似

签发kube-proxy证书

运维主机HDSS7-200.host.com上

创建生政证书签名要求(csr)的JSON配置文件

[root@hdss7-200 certs]# vim /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"
      }
  ]
}

生成证书

[root@hdss7-200 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
[root@hdss7-200 certs]# ll
-rw-r--r--. 1 root root 1005 Dec 14 16:43 kube-proxy-client.csr
-rw-------. 1 root root 1679 Dec 14 16:43 kube-proxy-client-key.pem
-rw-r--r--. 1 root root 1375 Dec 14 16:43 kube-proxy-client.pem
-rw-r--r--. 1 root root  267 Dec 14 16:36 kube-proxy-csr.json

分发证书，将证书拷贝到node节点

[root@hdss7-21 ~]# cd /opt/kubernetes/server/bin/cert/
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/kube-proxy-client.pem .
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/kube-proxy-client-key.pem .

在conf文件夹下创建配置 -- 只做一次，然后将kube-proxy.kubeconfig拷贝至各个node节点

[root@hdss7-21 conf]# 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
Cluster "myk8s" set.

[root@hdss7-21 conf]# ls
audit.yaml  k8s-node.yaml  kubelet.kubeconfig  kube-proxy.kubeconfig

[root@hdss7-21 conf]# 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
User "kube-proxy" set.

[root@hdss7-21 conf]# kubectl config set-context myk8s-context \
 --cluster=myk8s \
 --user=kube-proxy \
 --kubeconfig=kube-proxy.kubeconfig 
Context "myk8s-context" created.

[root@hdss7-21 conf]# kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig
Switched to context "myk8s-context".

第一台node节点部署完成后，将生成的配置文件拷贝至各个Node节点

[root@hdss7-22 ~]# cd /opt/kubernetes/server/bin/conf/
[root@hdss7-22 conf]# scp hdss7-21:/opt/kubernetes/server/bin/conf/kube-proxy.kubeconfig .

加载ipvs模块

[root@hdss7-21 conf]# cd
[root@hdss7-21 ~]# lsmod | grep ip_vs
[root@hdss7-21 ~]# vi 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@hdss7-21 ~]# chmod +x ipvs.sh 
[root@hdss7-21 ~]# ./ipvs.sh
[root@hdss7-21 ~]# 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           12740  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                 145497  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          133095  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

创建kube-proxy启动脚本

[root@hdss7-21 ~]# vi /opt/kubernetes/server/bin/kube-proxy.sh

#!/bin/sh
./kube-proxy \
--cluster-cidr 172.7.0.0/16 \
--hostname-override hdss7-21.host.com \
--proxy-mode=ipvs \
--ipvs-scheduler=nq \
--kubeconfig ./conf/kube-proxy.kubeconfig

[root@hdss7-21 ~]# chmod +x /opt/kubernetes/server/bin/kube-proxy.sh  
[root@hdss7-21 ~]# mkdir /data/logs/kubernetes/kube-proxy
[root@hdss7-21 ~]# vi /etc/supervisord.d/kube-proxy.ini

[program:kube-proxy-7-21]
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)
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)
killallgroup=true
stopgroup=true

[root@hdss7-21 ~]# supervisorctl update
kube-proxy-7-21: added process group
[root@hdss7-21 ~]# supervisorctl status
kube-proxy-7-21                  RUNNING   pid 110734, uptime 0:01:33

查看ipvs是否生效

[root@hdss7-21 ~]# yum install ipvsadm -y
[root@hdss7-21 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.254.0.1:443 nq
  -> 10.0.0.21:6443               Masq    1      0          0         
  -> 10.0.0.22:6443               Masq    1      0          0
[root@hdss7-21 ~]# cat /data/logs/kubernetes/kube-proxy/proxy.stdout.log | more

验证kubernetes集群

在任意一个运算节点，创建一个资源配置清单这里我们选择HDSS7-21.host.com
```
[root@hdss7-21 ~]# vi 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:v1.15
        ports:
        - containerPort: 80

[root@hdss7-22 ~]# kubectl apply -f nginx-ds.yaml 
daemonset.extensions/nginx-ds created
[root@hdss7-21 ~]# kubectl get cs
NAME                 STATUS    MESSAGE              ERROR
controller-manager   Healthy   ok                   
scheduler            Healthy   ok                   
etcd-1               Healthy   {"health": "true"}   
etcd-0               Healthy   {"health": "true"}   
etcd-2               Healthy   {"health": "true"}   
[root@hdss7-21 ~]# kubectl get node
NAME                STATUS   ROLES         AGE   VERSION
hdss7-21.host.com   Ready    master,node   17h   v1.15.2
hdss7-22.host.com   Ready    master,node   16h   v1.15.2
[root@hdss7-21 ~]# kubectl get pods
NAME             READY   STATUS    RESTARTS   AGE
nginx-ds-jw5c5   1/1     Running   0          116s
nginx-ds-nsfrf   1/1     Running   0          116s

测试完删除

[root@hdss7-22 ~]# kubectl apply -f nginx-ds.yaml 
daemonset.extensions/nginx-ds created

kubectl 命令补全

[root@hdss7-21 src]# source <(kubectl completion bash)
[root@hdss7-21 src]# echo "source <(kubectl completion bash)" >> ~/.bashrc

实现一整套的K8S生态的搭建，并实战交付一套dubbo(java)微服务，我们要一步步实现以下工呢

持续集成
配置中心
监控意向图
日志收集分析系统
自动化运维平台（最终实现基于K8S的开源Paas平台）

资源要求

2c/2g/50g x 3 + 4c/4g/50g x 2

posted @ 2020-04-15 13:58 renato-zhang 阅读(172) 评论(0) 编辑收藏举报

刷新页面返回顶部

kubernetes二进制部署（HA）

Kubernetes 企业级部署实战

环境

部署DNS服务

建议不在网卡配置中声明DNS1 重启网络服务会影响resolv.conf文件中某些配置

准备签发证书环境

运维主机HDSS7-200.host.coms上

部署docker环境

在node主机与运维主机上：21、22、200

Harbor 搭建

安装1.7.6以上版本

部署etcd集群

集群规划

安装部署主控节点服务 -- apiserver

部署kube-apiserver集群

集群规划

运维主机HDSS-200.host.com上

L4反向代理apiserver保证高可用

keepalived主

keepalived从:

安装部署主控节点控制器与调度服务

集群规划

部署kube-controller-manager

部署kube-scheduler

部署Node节点服务

部署kubelet

集群规划

运维主机HDSS7-200.host.com

签发证书

HDSS7-22上:

准备pause基础镜像 --sidecar模式

部署kube-proxy

集群规划

签发kube-proxy证书

验证kubernetes集群

kubectl 命令补全

实现一整套的K8S生态的搭建，并实战交付一套dubbo(java)微服务，我们要一步步实现以下工呢

资源要求

公告