1.18 --kubeconfig ./admin.conf
1系统初始化
1.1 初始化工具安装
#所有节点
[root@master-1 ~]# yum install net-tools vim wget lrzsz git -y
1.2 关闭防火墙与Selinux
#所有节点
[root@master-1 ~]# systemctl stop firewalld
[root@master-1 ~]# systemctl disable firewalld
[root@master-1 ~]# sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
[root@master-1 ~]# reboot
1.3设置时区
#所有节点
[root@master-1 ~]# \cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime -rf
1.4关闭交换分区
#所有节点
[root@master-1 ~]# swapoff -a
[root@master-1 ~]# sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
1.5设置系统时间同步
#所有节点
[root@master-1 ~]# yum install -y ntpdate
[root@master-1 ~]# ntpdate -u ntp.api.bz
[root@master-1 ~]# echo "*/5 * * * * ntpdate time7.aliyun.com >/dev/null 2>&1" >> /etc/crontab
[root@master-1 ~]# service crond restart
[root@master-1 ~]# chkconfig crond on
1.6 设置主机名
#所有节点
[root@master-1 ~]# cat > /etc/hosts <<EOF
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.91.18 master-1
192.168.91.19 master-2
192.168.91.20 master-3
192.168.91.21 node-1
192.168.91.22 node-2
EOF
1.7 设置免密码登录
#从任意Master节点分发配置到其他所有的节点(包括其他的Master与Node)
#本例中从master-1分发
[root@master-1 ~]# yum install -y expect
[root@master-1 ~]# ssh-keygen -t rsa -P "" -f /root/.ssh/id_rsa
#密码更换
[root@master-1 ~]# export mypass=123456s
[root@master-1 ~]# name=(master-1 master-2 master-3 node-1 node-2)
[root@master-1 ~]# for i in ${name[@]};do
expect -c "
spawn ssh-copy-id -i /root/.ssh/id_rsa.pub root@$i
expect {
\"*yes/no*\" {send \"yes\r\"; exp_continue}
\"*password*\" {send \"$mypass\r\"; exp_continue}
\"*Password*\" {send \"$mypass\r\";}
}"
done
#连接测试
[root@master-1 ~]# ssh master-2
1.8 优化内核参数
#所有节点
[root@master-1 ~]# modprobe br_netfilter
[root@master-1 ~]# cat >>/etc/sysctl.conf<<EOF
net.bridge.bridge-nf-call-iptables=1
net.bridge.bridge-nf-call-ip6tables=1
net.ipv4.ip_forward=1
vm.swappiness=0
fs.file-max=52706963
fs.nr_open=52706963
EOF
#参数说明
fs.file-max 系统级打开最大文件句柄的数量
fs.nr_openlinux系统中设置epoll/pthread等最大进程数目
#应用内核配置
[root@master-1 ~]# sysctl -p
1.9 高可用节点安装Keepalived
#192.168.91.18
[root@master-1 ~]# yum install -y keepalived
#注意修改网卡地址与SLAVE节点的优先级
[root@master-1 ~]# cat >/etc/keepalived/keepalived.conf <<EOL
global_defs {
router_id KUB_LVS
}
vrrp_script CheckMaster {
script "curl -k https://192.168.91.254:6443"
interval 3
timeout 9
fall 2
rise 2
}
vrrp_instance VI_1 {
state MASTER
interface ens32
virtual_router_id 61
priority 100
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 111111
}
virtual_ipaddress {
192.168.91.254/24 dev ens32
}
track_script {
CheckMaster
}
}
EOL
#SLAVE
#修改state为slave, priority 为 90
1.10 启动keepalived
[root@master-1 ~]# systemctl enable keepalived && systemctl restart keepalived
[root@master-1 ~]# service keepalived status
2 配置证书
配置cfssl用于创建证书
#提示生成证书工具有三种:easyrsa openssl cfssl
#master-1
[root@master-1 ~]# mkdir /soft; cd /soft
[root@master-1 ~]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
[root@master-1 ~]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
[root@master-1 ~]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
[root@master-1 ~]# chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
[root@master-1 ~]# mv cfssl_linux-amd64 /usr/local/bin/cfssl
[root@master-1 ~]# mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
[root@master-1 ~]# mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo
2.1 生成ETCD证书
#创建目录（Master-1）
[root@master-1 ~]# mkdir /root/etcd && cd /root/etcd
2.2.1 CA 证书配置（Master-1）
[root@master-1 ~]# cat << EOF | tee ca-config.json
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"www": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
# expiry 表示证书过期时间
# 参数详解
ca-config.json：可以定义多个 profiles，分别指定不同的过期时间、使用场景等参数；后续在签名证书时使用某个 profile；
signing： 表示该证书可用于签名其它证书；生成的 ca.pem 证书中 CA=TRUE；
server auth： 表示client可以用该 CA 对server提供的证书进行验证；
client auth： 表示server可以用该CA对client提供的证书进行验证；
2.2.2 创建CA证书请求文件（Master-1）
[root@master-1 ~]# cat << EOF | tee ca-csr.json
{
"CN": "etcd CA",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF
参数详解：
CN：Common Name，kube-apiserver 从证书中提取该字段作为请求的用户名 (User Name)；浏览器使用该字段验证网站是否合法；
names中的字段：
C : country，国家
ST: state，州或省份
L：location，城市
O：organization，组织，kube-apiserver 从证书中提取该字段作为请求用户所属的组 (Group)
OU：organization unit,组织单位
2.2.3 创建ETCD证书请求文件
#可以把所有的master IP 加入到csr文件中（Master-1）
[root@master-1 ~]# cat << EOF | tee server-csr.json
{
"CN": "etcd",
"hosts": [
"master-1",
"master-2",
"master-3",
"192.168.91.18",
"192.168.91.19",
"192.168.91.20"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF
#hosts包含的是授权范围,不在此范围的的节点或者服务使用此证书就会报证书不匹配错误. 为空或者""表示所有客户端的都可以使用
2.2.4 生成 ETCD CA 证书和ETCD公私钥（Master-1）
[root@master-1 ~]# cd /root/etcd/
2.2.5
#生成ca证书（Master-1）
[root@master-1 ~]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca –
[root@master-1 etcd]# ll
2.2.6
#生成etcd证书（Master-1）
[root@master-1 etcd]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
# cfssl参数解释
gencert: 生成新的key(密钥)和签名证书
-initca：初始化一个新ca
-ca：指明ca的证书
-ca-key：指明ca的私钥文件
-config：指明请求证书的json文件
-profile：与-config中的profile对应，是指根据config中的profile段来生成证书的相关信息
#查看证书
[root@master-1 etcd]# ll
2.2.7 #安装ETCD
[root@master-1 soft]# tar xfv etcd-v3.4.7-linux-amd64.tar.gz
[root@master-1 soft]# cd etcd-v3.4.7-linux-amd64
[root@master-1 etcd-v3.4.7-linux-amd64]# cp etcd /usr/local/bin
[root@master-1 etcd-v3.4.7-linux-amd64]# cp etcdctl /usr/local/bin
[root@master-1 etcd-v3.4.7-linux-amd64]# chmod +x /usr/local/bin/etcd
[root@master-1 etcd-v3.4.7-linux-amd64]# chmod +x /usr/local/bin/etcdctl
2.2.8 #复制到其他的master节点
[root@master-1 etcd-v3.4.7-linux-amd64]# for i in master-2 master-3;do scp /usr/local/bin/etcd* $i:/usr/local/bin/;done
[root@master-1 ~]# mkdir -p /etc/etcd/{cfg,ssl}
2.2.9 #其他master节点创建目录
[root@master-1 etcd-v3.4.7-linux-amd64]# for i in master-2 master-3;do ssh $i "mkdir -p /etc/etcd/{cfg,ssl}";done
2.3.0 #创建配置文件
[root@master-1 ~]# cat >/etc/etcd/cfg/etcd.conf<<EOFL
#[Member]
ETCD_NAME="master-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.91.18:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.91.18:2379,http://192.168.91.18:2390"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.91.18:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.91.18:2379"
ETCD_INITIAL_CLUSTER="master-1=https://192.168.91.18:2380,master-2=https://192.168.91.19:2380,master-3=https://192.168.91.20:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ENABLE_V2="true"
EOFL
#参数说明:
ETCD_NAME 节点名称, 如果有多个节点, 那么每个节点要修改为本节点的名称。
ETCD_DATA_DIR 数据目录
ETCD_LISTEN_PEER_URLS 集群通信监听地址
ETCD_LISTEN_CLIENT_URLS 客户端访问监听地址
ETCD_INITIAL_ADVERTISE_PEER_URLS 集群通告地址
ETCD_ADVERTISE_CLIENT_URLS 客户端通告地址
ETCD_INITIAL_CLUSTER 集群节点地址,如果多个节点那么逗号分隔
ETCD_INITIAL_CLUSTER="master1=https://192.168.91.200:2380,master2=https://192.168.91.201:2380,master3=https://192.168.91.202:2380"
ETCD_INITIAL_CLUSTER_TOKEN 集群Token
ETCD_INITIAL_CLUSTER_STATE 加入集群的当前状态，new是新集群，existing表示加入已有集群
2.3.1 创建ETCD的系统启动服务(所有master)
报错:
ETCD3.4版本会自动读取环境变量的参数,所以EnvironmentFile文件中有的参数,不需要再次在ExecStart启动参数中添加,二选一,
如同时配置，会触发以下类似报错“etcd: conflicting environment variable "ETCD_NAME"
is shadowed by corresponding command-line flag (either unset environment variable or disable flag)”
[root@master-1 ~]# cat > /usr/lib/systemd/system/etcd.service<<EOFL
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/etc/etcd/cfg/etcd.conf
ExecStart=/usr/local/bin/etcd \
--initial-cluster-state=new \
--cert-file=/etc/etcd/ssl/server.pem \
--key-file=/etc/etcd/ssl/server-key.pem \
--peer-cert-file=/etc/etcd/ssl/server.pem \
--peer-key-file=/etc/etcd/ssl/server-key.pem \
--trusted-ca-file=/etc/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/etc/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOFL
2.3.2 复制etcd证书到指定目录
#此目录与之前的ETCD启动目录相一致
#如果有多个Master节点, 那么需要复制到每个Master (从master-1复制到其他master节点)
[root@master-1 ~]# mkdir -p /etc/etcd/ssl/
[root@master-1 ~]# \cp /root/etcd/*pem /etc/etcd/ssl/ -rf
2.3.3 #复制etcd证书到每个节点
[root@master-1 ~]# for i in master-2 master-3 node-1 node-2;do ssh $i mkdir -p /etc/etcd/{cfg,ssl};done
[root@master-1 ~]# for i in master-2 master-3 node-1 node-2;do scp /etc/etcd/ssl/* $i:/etc/etcd/ssl/;done
2.3.4 启动etcd (所有节点)
[root@master-1 ~]# chkconfig etcd on
[root@master-1 ~]# service etcd start
[root@master-1 ~]# service etcd status
2.3.5 #debug 模式启动测试
/usr/local/bin/etcd \
--name=master-1 \
--data-dir=/var/lib/etcd/default.etcd \
--listen-peer-urls=https://192.168.91.18:2380 \
--listen-client-urls=https://192.168.91.18:2379,http://192.168.91.18:2390 \
--advertise-client-urls=https://192.168.91.18:2379 \
--initial-advertise-peer-urls=https://192.168.91.18:2380 \
--initial-cluster=master-1=https://192.168.91.18:2380,master-2=https://192.168.91.19:2380,master-3=https://192.168.91.20:2380 \
--initial-cluster-token=etcd-cluster \
--initial-cluster-state=new \
--cert-file=/etc/etcd/ssl/server.pem \
--key-file=/etc/etcd/ssl/server-key.pem \
--peer-cert-file=/etc/etcd/ssl/server.pem \
--peer-key-file=/etc/etcd/ssl/server-key.pem \
--trusted-ca-file=/etc/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/etc/etcd/ssl/ca.pem
2.3.6 #集群状态检查
[root@master-2 ~]# etcdctl --cacert=/etc/etcd/ssl/ca.pem \
--cert=/etc/etcd/ssl/server.pem \
--key=/etc/etcd/ssl/server-key.pem \
--endpoints="https://192.168.91.18:2379,https://192.168.91.19:2379,https://192.168.91.20:2379" \
endpoint health
#返回结果
https://192.168.91.18:2379 is healthy: successfully committed proposal: took = 13.39398ms
https://192.168.91.19:2379 is healthy: successfully committed proposal: took = 20.742964ms
https://192.168.91.20:2379 is healthy: successfully committed proposal: took = 21.769598ms
2.3.7 设置flannel 网段
ETCDCTL_API=2 etcdctl \
--endpoints="https://192.168.91.18:2379,https://192.168.91.19:2379,https://192.168.91.20:2379" \
--ca-file=/etc/etcd/ssl/ca.pem \
--key-file=/etc/etcd/ssl/server-key.pem \
--cert-file=/etc/etcd/ssl/server.pem \
set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan","Directrouting": true}}'
2.3.8 查看设置flannel 网段
ETCDCTL_API=2 etcdctl --ca-file=/etc/etcd/ssl/ca.pem \
--cert-file=/etc/etcd/ssl/server.pem --key-file=/etc/etcd/ssl/server-key.pem \
--endpoints="https://192.168.91.18:2379,https://192.168.91.19:2379,https://192.168.91.20:2379" \
ls /coreos.com/network/config
#输出以下内容, 表示正常
/coreos.com/network/config
3.0 生成kubernetes 证书
#创建 Kubernetes 相关证书
#此证书用于Kubernetes节点直接的通信, 与之前的ETCD证书不同. （Master-1）
[root@master-1 ~]# mkdir /root/kubernetes/ && cd /root/kubernetes/
3.1 配置ca 文件（Master-1）
[root@master-1 ~]# cat << EOF | tee ca-config.json
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"kubernetes": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
3.2 创建ca证书申请文件（Master-1）
[root@master-1 ~]# cat << EOF | tee ca-csr.json
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
#证书字段意义
CN=commonName (网站域名)
OU=organizationUnit (组织部门名)
O=organizationName (组织名)
L=localityName (城市)
S=stateName (省份)
C=country (国家)
3.3 生成API SERVER证书申请文件（Master-1）
#注意要修改VIP的地址
[root@master-1 ~]# cat << EOF | tee server-csr.json
{
"CN": "kubernetes",
"hosts": [
"10.0.0.1",
"127.0.0.1",
"10.0.0.2",
"192.168.91.18",
"192.168.91.19",
"192.168.91.20",
"192.168.91.21",
"192.168.91.22",
"192.168.91.254",
"master-1",
"master-2",
"master-3",
"node-1",
"node-2",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
3.4 创建 Kubernetes Proxy 证书申请文件（Master-1）
[root@master-1 ~]# cat << EOF | tee kube-proxy-csr.json
{
"CN": "system:kube-proxy",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
3.5 生成 kubernetes CA 证书和公私钥
# 生成ca证书（Master-1）
[root@master-1 ~]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca –
3.5.1 # 生成 api-server 证书（Master-1）
[root@master-1 ~]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem \
-config=ca-config.json \
-profile=kubernetes server-csr.json | cfssljson -bare server
# cfssl参数
gencert: 生成新的key(密钥)和签名证书
-initca：初始化一个新ca
-ca：指明ca的证书
-ca-key：指明ca的私钥文件
-config：指明请求证书的json文件
-profile：与-config中的profile对应，是指根据config中的profile段来生成证书的相关信息
3.5.2 # 生成 kube-proxy 证书（Master-1）
[root@master-1 ~]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json \
-profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
4 安装 Docker
#安装CE版本
[root@node-1 ~]# yum install -y yum-utils device-mapper-persistent-data lvm2
[root@node-1 ~]# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
[root@node-1 ~]# yum install -y docker-ce-19.03.6 docker-ce-cli-19.03.6 containerd.io
#如果安装比较慢,使用本地安装
[root@node-1 ~]# yum localinstall containerd.io-1.2.10-3.2.el7.x86_64.rpm \
docker-ce-19.03.6-3.el7.x86_64.rpm \
docker-ce-cli-19.03.6-3.el7.x86_64.rpm
4.1 启动Docker服务
[root@node-1 ~]# chkconfig docker on
[root@node-1 ~]# service docker start
[root@node-1 ~]# service docker status
4.2 配置镜像加速器(所有node节点)
[root@node-1 ~]# mkdir -p /etc/docker
[root@node-1 ~]# tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://plqjafsr.mirror.aliyuncs.com"]
}
EOF
#重启docker
[root@node-1 ~]# systemctl daemon-reload
[root@node-1 ~]# systemctl restart docker
5 安装flannel
5.1 下载Flannel二进制包
#所有的节点,下载到master-1
[root@ master -1 ~]# mkdir /soft ; cd /soft
[root@ master -1 ~]# wget https://github.com/coreos/flannel/releases/download/v0.11.0/flannel-v0.11.0-linux-amd64.tar.gz
[root@ master -1 ~]# tar xvf flannel-v0.11.0-linux-amd64.tar.gz
[root@ master -1 ~]# mv flanneld mk-docker-opts.sh /usr/local/bin/
#复制flanneld到其他的所有节点
[root@ master -1 ~]# for i in master-2 master-3 node-1 node-2;do scp /usr/local/bin/mk-docker-opts.sh /usr/local/bin/flanneld $i:/usr/local/bin/;done
5.2 配置Flannel (所有节点)
[root@node-1 ~]# mkdir -p /etc/flannel
[root@node-1 ~]# cat > /etc/flannel/flannel.cfg<<EOF
FLANNEL_OPTIONS="-etcd-endpoints=https://192.168.91.18:2379,https://192.168.91.19:2379,https://192.168.91.20:2379 -etcd-cafile=/etc/etcd/ssl/ca.pem -etcd-certfile=/etc/etcd/ssl/server.pem -etcd-keyfile=/etc/etcd/ssl/server-key.pem"
EOF
5.3 配置flannel 配置文件
cat > /usr/lib/systemd/system/flanneld.service <<EOF
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service
[Service]
Type=notify
EnvironmentFile=/etc/flannel/flannel.cfg
ExecStart=/usr/local/bin/flanneld --ip-masq \$FLANNEL_OPTIONS
ExecStartPost=/usr/local/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
5.4 启动Flannel
[root@node-1 ~]# service flanneld start
[root@node-1 ~]# chkconfig flanneld on
[root@node-2 ~]# service flanneld status
5.5#node节点停止flanneld
[root@node-1 ~]# service flanneld stop
5.6 修改docker 配置文件(所有node节点)
[root@node-1 ~]# cat >/usr/lib/systemd/system/docker.service<<EOFL
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd \$DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP \$MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
EOFL
5.7 重启Docker服务
[root@node-1 ~]# systemctl daemon-reload
[root@node-1 ~]# service flanneld restart
[root@node-1 ~]# service docker restart
6 安装Master组件
6.1 安装Api Server服务
6.1.1 下载Kubernetes二进制包(1.18.3)（master-1）
[root@master-1 soft]# cd /soft
[root@master-1 soft]# tar xvf kubernetes-server-linux-amd64.tar.gz
[root@master-1 soft]# cd kubernetes/server/bin/
[root@master-1 soft]# cp kube-scheduler kube-apiserver kube-controller-manager kubectl /usr/local/bin/
#复制执行文件到其他的master节点
[root@master-1 bin]# for i in master-2 master-3;do scp /usr/local/bin/kube* $i:/usr/local/bin/;done
6.1.2 配置Kubernetes证书
#Kubernetes各个组件之间通信需要证书,需要复制个每个master节点（master-1）
[root@master-1 soft]# mkdir -p /etc/kubernetes/{cfg,ssl}
[root@master-1 soft]# cp /root/kubernetes/*.pem /etc/kubernetes/ssl/
#复制到其他的节点
[root@master-1 soft]# for i in master-2 master-3 node-1 node-2;do ssh $i mkdir -p /etc/kubernetes/{cfg,ssl};done
[root@master-1 soft]# for i in master-2 master-3 node-1 node-2;do scp /etc/kubernetes/ssl/* $i:/etc/kubernetes/ssl/;done
[root@master-1 bin]# for i in master-2 master-3 node-1 node-2;do echo $i "---------->"; ssh $i ls /etc/kubernetes/ssl;done
6.1.4 编辑Token 文件(master-1)
#f89a76f197526a0d4bc2bf9c86e871c3:随机字符串,自定义生成; kubelet-bootstrap:用户名; 10001:UID; system:kubelet-bootstrap：用户组
[root@master-1 soft]# vim /etc/kubernetes/cfg/token.csv
f89a76f197526a0d4bc2bf9c86e871c3,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
#复制到其他的master节点
[root@master-1 bin]# for i in master-2 master-3;do scp /etc/kubernetes/cfg/token.csv $i:/etc/kubernetes/cfg/token.csv;done
#配置启动文件
[root@master-1 soft]# cat >/etc/kubernetes/cfg/kube-apiserver.cfg <<EOFL
KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--insecure-bind-address=0.0.0.0 \
--insecure-port=8080 \
--etcd-servers=https://192.168.91.18:2379,https://192.168.91.19:2379,https://192.168.91.20:2379 \
--bind-address=0.0.0.0 \
--secure-port=6443 \
--advertise-address=0.0.0.0 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth \
--token-auth-file=/etc/kubernetes/cfg/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/etc/kubernetes/ssl/server.pem \
--tls-private-key-file=/etc/kubernetes/ssl/server-key.pem \
--client-ca-file=/etc/kubernetes/ssl/ca.pem \
--service-account-key-file=/etc/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/etc/etcd/ssl/ca.pem \
--etcd-certfile=/etc/etcd/ssl/server.pem \
--etcd-keyfile=/etc/etcd/ssl/server-key.pem"
EOFL
#设置启动
cat >/usr/lib/systemd/system/kube-apiserver.service<<EOFL
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-apiserver.cfg
ExecStart=/usr/local/bin/kube-apiserver \$KUBE_APISERVER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOFL
#配置自动启动
[root@master-1 soft]# service kube-apiserver start
[root@master-1 soft]# chkconfig kube-apiserver on
6.2 部署kube-scheduler 服务
#创建kube-scheduler配置文件（所有的master节点）
[root@master-1 soft]# cat >/etc/kubernetes/cfg/kube-scheduler.cfg<<EOFL
KUBE_SCHEDULER_OPTS="--logtostderr=true --v=4 --bind-address=0.0.0.0 --master=127.0.0.1:8080 --leader-elect"
EOFL
6.3 设置启动文件
[root@master-1 soft]# cat >/usr/lib/systemd/system/kube-scheduler.service<<EOFL
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-scheduler.cfg
ExecStart=/usr/local/bin/kube-scheduler \$KUBE_SCHEDULER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOFL
6.2.2 启动kube-scheduler服务（所有的master节点）
[root@master-1 soft]# service kube-scheduler restart
[root@master-1 soft]# chkconfig kube-scheduler on
6.3 部署kube-controller-manager
6.3.1创建kube-controller-manager配置文件(所有节点)
[root@master-1 bin]# cat >/etc/kubernetes/cfg/kube-controller-manager.cfg<<EOFL
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \
--v=4 \
--master=127.0.0.1:8080 \
--leader-elect=true \
--address=0.0.0.0 \
--service-cluster-ip-range=10.0.0.0/24 \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/etc/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/etc/kubernetes/ssl/ca-key.pem \
--root-ca-file=/etc/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/etc/kubernetes/ssl/ca-key.pem"
EOFL
6.3.2 创建kube-controller-manager 启动文件
[root@master-1 bin]# cat >/usr/lib/systemd/system/kube-controller-manager.service<<EOFL
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-controller-manager.cfg
ExecStart=/usr/local/bin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOFL
6.3.3启动kube-controller-manager服务
[root@master-1 bin]# chkconfig kube-controller-manager on
[root@master-1 bin]# service kube-controller-manager start
[root@master-2 ~]# service kube-controller-manager status
7.1.1 从Master节点复制Kubernetes 文件到Node
#配置Node节点
[root@master-1 bin]#cd /soft
[root@master-1 bin]# for i in node-1 node-2;do scp kubernetes/server/bin/kubelet kubernetes/server/bin/kube-proxy $i:/usr/local/bin/;done
#Maste-1节点
[root@master-1 bin]# mkdir /root/config ; cd /root/config
[root@master-1 bin]# cat >environment.sh<<EOFL
# 创建kubelet bootstrapping kubeconfig
BOOTSTRAP_TOKEN=f89a76f197526a0d4bc2bf9c86e871c3
KUBE_APISERVER="https://192.168.91.254:6443"
# 设置集群参数
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=\${KUBE_APISERVER} \
--kubeconfig=bootstrap.kubeconfig
# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
--token=\${BOOTSTRAP_TOKEN} \
--kubeconfig=bootstrap.kubeconfig
# 设置上下文参数
kubectl config set-context default \
--cluster=kubernetes \
--user=kubelet-bootstrap \
--kubeconfig=bootstrap.kubeconfig
# 设置默认上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
#通过 bash environment.sh获取 bootstrap.kubeconfig 配置文件。
EOFL
#执行脚本
[root@master-1 bin]# sh environment.sh
10.1.3创建kube-proxy kubeconfig文件 （master-1）
[root@master-1 bin]# cat >env_proxy.sh<<EOF
# 创建kube-proxy kubeconfig文件
BOOTSTRAP_TOKEN=f89a76f197526a0d4bc2bf9c86e871c3
KUBE_APISERVER="https://192.168.91.254:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=\${KUBE_APISERVER} \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=/etc/kubernetes/ssl/kube-proxy.pem \
--client-key=/etc/kubernetes/ssl/kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-context default \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
EOF
#执行脚本
[root@master-1 bin]# sh env_proxy.sh
10.1.4 复制kubeconfig文件与证书到所有Node节点
#将bootstrap kubeconfig kube-proxy.kubeconfig 文件复制到所有Node节点
#远程创建目录 (master-1)
[root@master-1 bin]# for i in node-1 node-2;do ssh $i "mkdir -p /etc/kubernetes/{cfg,ssl}";done
#复制证书文件ssl (master-1)
[root@master-1 config]# for i in node-1 node-2;do scp /etc/kubernetes/ssl/* $i:/etc/kubernetes/ssl/;done
#复制kubeconfig文件 (master-1)
[root@master-1 bin]# cd /root/config
[root@master-1 config]# for i in node-1 node-2;do scp -rp bootstrap.kubeconfig kube-proxy.kubeconfig $i:/etc/kubernetes/cfg/;done
10.1.5 创建kubelet参数配置文件
#不同的Node节点, 需要修改IP地址 （node节点操作）
[root@ node-1 bin]# cat >/etc/kubernetes/cfg/kubelet.config<<EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.91.21
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS: ["10.0.0.2"]
clusterDomain: cluster.local.
failSwapOn: false
authentication:
anonymous:
enabled: true
EOF
[root@node-1 bin]#cat >/etc/kubernetes/cfg/kubelet<<EOF
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.91.21 \
--kubeconfig=/etc/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/etc/kubernetes/cfg/bootstrap.kubeconfig \
--config=/etc/kubernetes/cfg/kubelet.config \
--cert-dir=/etc/kubernetes/ssl \
--pod-infra-container-image=docker.io/kubernetes/pause:latest"
EOF
cat >/usr/lib/systemd/system/kubelet.service<<EOF
[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kubelet
ExecStart=/usr/local/bin/kubelet \$KUBELET_OPTS
Restart=on-failure
KillMode=process
[Install]
WantedBy=multi-user.target
EOF
10.1.8 将kubelet-bootstrap用户绑定到系统集群角色
#master-1节点操作
[root@master-1 bin]#kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap
10.1.9 启动kubelet服务（node节点）
[root@node-1 bin]#chkconfig kubelet on
[root@node-1 bin]#service kubelet start
[root@node-1 bin]#service kubelet status
10.2.1 批准请求
#Master节点操作
[root@master-1 bin]#kubectl certificate approve node-csr-4_tHtI9Y1ZOd1V3ZF5URGT7bWuRZWOizZYgeaBiAHOY
[root@master-1 bin]#kubectl certificate approve node-csr-bvq5buFKqAMvdJWOUjjP7hdez3xkQq5DPC4nNIL2vQs
10.4.1 创建kube-proxy配置文件
#注意修改hostname-override地址, 不同的节点则不同。
[root@node-1 ~]#cat >/etc/kubernetes/cfg/kube-proxy<<EOF
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--metrics-bind-address=0.0.0.0 \
--hostname-override=192.168.91.21 \
--cluster-cidr=10.0.0.0/24 \
--kubeconfig=/etc/kubernetes/cfg/kube-proxy.kubeconfig"
EOF
10.4.2 创建kube-proxy systemd unit 文件
[root@node-1 ~]#cat >/usr/lib/systemd/system/kube-proxy.service<<EOF
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-proxy
ExecStart=/usr/local/bin/kube-proxy \$KUBE_PROXY_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
10.4.3 启动kube-proxy 服务
[root@node-1 ~]#chkconfig kube-proxy on
[root@node-1 ~]#service kube-proxy start
[root@node-1 ~]#service kube-proxy status
运行Demo项目
[root@master-1 config]# kubectl create deployment nginx-demo --image=nginx
#扩容
[root@master-1 config]# kubectl scale deployment nginx-demo --replicas 2
#获取节点
[root@master-1 config]# kubectl get pods -o wide
[root@master-1 config]# kubectl expose deployment nginx-demo --port=88 --target-port=80 --type=NodePort
[root@master-1 config]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.0.0.1 <none> 443/TCP 43m
nginx-demo NodePort 10.0.0.207 <none> 88:46965/TCP 3s
#访问服务
[root@master-1 config]# curl 192.168.91.21:46965
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
