说明

能自动化的事就不要手动

如果一切顺利的话大概10分钟左右搭建好k8s集群 该脚本可以先看看注意有些包都是提前下载好了的 执行脚本前请先下载相关包到机器上 系统推荐CentOS Linux release 7.9.2009 (Core)内核推荐 4.4.245-1.el7.elrepo.x86_64以上 后续会继续完成node节点的脚本和初始化系统环境的脚本

执行成功效果图

shell一键安装k8s集群（三台master 也是node节点）

#!/usr/bin/env bash
# Author:xiaolang
# Blog:https://www.cnblogs.com/xiaolang666


# 逻辑判断函数执行失败就终止运行
function judge() {
    if [ $2 -eq 0 ];then
        echo -e "\033[32m $1 \033[0m \n"
    else 
        echo -e "\033[41;36m $1 \033[0m \n"
        exit 0
    fi
}


# 1，安装集群证书命令
function install_certificate(){

    # 创建k8s用到的安装包和命令目录
    if [ -d /app/ ];then
        echo ‘/app/ 目录已经存在‘
    else
        mkdir -p /app/k8s/{tar,bin}/
    fi
    # 下载证书安装包
    #wget -P /app/k8s/bin/ https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
    #res=$?
    #judge ‘下载cfssl证书安装包‘ $res
    
    #wget -P /app/k8s/bin/ https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
    #res=$?
    #judge ‘下载cfssjsonl证书安装包‘ $res

    #设置执行权限
    for i in `ls /app/k8s/bin`
    do
        chmod +x /app/k8s/bin/$i
    done
    
    # 修改文件名
    mv /app/k8s/bin/cfssljson* /app/k8s/bin/cfssljson && mv /app/k8s/bin/cfssl_* /app/k8s/bin/cfssl
    
    # 移动到用户本地命令目录
    mv /app/k8s/bin/* /usr/local/sbin/
    
    # 验证
    . /etc/profile
    cfssl version &> /dev/null
    res=$?
    judge ‘cfssl命令生效‘ $res
}


# 2，创建etcd集群根证书
function create_cluster_base_cert(){ 
    # 
    mkdir -p /opt/cert/ca/
    
    # 创建etcd集群根证书json配置文件
    cat > /opt/cert/ca/ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
        "usages": [
          "signing",
          "key encipherment",
          "server auth",
          "client auth"
        ],
           "expiry": "87600h"
      }
    }
  }
}
EOF
    
    # 创建etcd根CA证书签名请求文件
    cat > /opt/cert/ca/ca-csr.json <<EOF
{
  "CN": "kubernetes",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names":[{
    "C": "CN",
    "ST": "ShangHai",
    "L": "ShangHai"
  }]
}
EOF
    
    # 生成根证书文件
    cd /opt/cert/ca/ &&  cfssl gencert -initca ca-csr.json | cfssljson -bare ca - && judge ‘ETCD根证书生成完毕‘ $? || judge ‘ETCD根证书生成失败‘ $?
}


# 部署etcd集群（部署在三台master节点上）
function etcd_deploy(){
    # 下载或则上传到/app/k8s/tar 目录
    cd /app/k8s/tar 
    
    # 下载ETCD安装包
    echo -e "\033[33m \t---------- 正在下载etcd安装包 请稍等.... ----------\t \033[0m\n" &&
    wget -P /app/k8s/tar/ https://mirrors.huaweicloud.com/etcd/v3.3.24/etcd-v3.3.24-linux-amd64.tar.gz
    judge ‘ETCD 安装包下载成功‘ $?
    
    # 解压and分发到其他master节点
    tar xf etcd-v3.3.24-linux-amd64.tar.gz -C /app/k8s/bin/
    
    # etcd命令分发至其他节点
    echo -e "\033[33m \t---------- 正在部署etcd服务端和客户端到所有集群中.... ----------\t \033[0m\n"
    for i in master1 master2 master3
    do
        scp /app/k8s/bin/etcd-v3.3.24-linux-amd64/etcd* root@$i:/usr/local/sbin/
    done

    # 查看etcd是否安装成功
    . /etc/profile
    etcd --version && judge ‘etcd安装成功‘ $? || judge ‘etcd数据库安装失败‘ $?
}


# 创建etcd证书
function create_etcd_cert(){
    # 创建etcd证书目录
    mkdir /opt/cert/etcd 
    cat > /opt/cert/etcd/etcd-csr.json << EOF
{
    "CN": "etcd",
    "hosts": [
    "127.0.0.1",
    "172.16.1.51",
    "172.16.1.52",
    "172.16.1.53",
    "172.16.1.56"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
          "C": "CN",
          "ST": "ShangHai",
          "L": "ShangHai"
        }
    ]
}
EOF

    # 生成etcd证书
    cd /opt/cert/etcd/ && cfssl gencert -ca=../ca/ca.pem -ca-key=../ca/ca-key.pem -config=../ca/ca-config.json -profile=kubernetes etcd-csr.json | cfssljson -bare etcd
    judge ‘etcd 证书生成完毕‘ $?
    
    # 分发证书
    for ip in master1 master2 master3
    do
      ssh root@${ip} "mkdir -p /etc/etcd/ssl"
      scp -q /opt/cert/ca/ca*.pem  root@${ip}:/etc/etcd/ssl
      ca_cert=$?
      scp -q /opt/cert/etcd/etcd*.pem  root@${ip}:/etc/etcd/ssl
      etcd_cert=$?
      if [ $ca_cert -eq 0 ] && [ $etcd_cert -eq 0 ];then
          echo -e "\033[32m $ip ca证书和etcd证书分发完毕 \033[0m \n"
      else
          echo -e "\033[41;36m $ip ca证书和etcd证书分发失败 \033[0m \n" 
          exit 0
      fi
    done

    for ip in master1 master2 master3
    do
        # 拿到远程执行命令的结果
        cert_num=$(ssh root@$ip "ls  /etc/etcd/ssl/ | wc -l")
        if [ "$cert_num" -eq 4 ];then
            echo -e "\033[32m $ip 验证证书已成功分发 \033[0m \n" 
        else
            echo -e "\033[41;36m $ip 验证证书分发失败 \033[0m \n" 
            exit 0
        fi
        
    done
}


# 生成etcd脚本注册文件
function etcd_script(){
cat > /app/k8s/bin/etcd_servie.sh << ENDOF
# 创建etcd配置目录
mkdir -p /etc/kubernetes/conf/etcd
INITIAL_CLUSTER=master1=https://172.16.1.51:2380,master2=https://172.16.1.52:2380,master3=https://172.16.1.53:2380

# 注册etcd system管理
cat > /usr/lib/systemd/system/etcd.service <<EOF
[Unit]
Description=etcd
Documentation=https://github.com/coreos

[Service]
ExecStart=/usr/local/sbin/etcd \  --name \$1 \  --cert-file=/etc/etcd/ssl/etcd.pem \  --key-file=/etc/etcd/ssl/etcd-key.pem \  --peer-cert-file=/etc/etcd/ssl/etcd.pem \  --peer-key-file=/etc/etcd/ssl/etcd-key.pem \  --trusted-ca-file=/etc/etcd/ssl/ca.pem \  --peer-trusted-ca-file=/etc/etcd/ssl/ca.pem \  --peer-client-cert-auth \  --client-cert-auth \  --initial-advertise-peer-urls https://\${2}:2380 \  --listen-peer-urls https://\${2}:2380 \  --listen-client-urls https://\${2}:2379,https://127.0.0.1:2379 \  --advertise-client-urls https://\${2}:2379 \  --initial-cluster-token etcd-cluster \  --initial-cluster \${INITIAL_CLUSTER} \  --initial-cluster-state new \  --data-dir=/var/lib/etcd
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF
ENDOF

    # 增加执行权限
    chmod +x /app/k8s/bin/etcd_servie.sh
}


# 批处理执行etcd脚本
function batch_execute_etcd_script(){
    # master执行etcd服务注册
    for ip in master1 master2 master3
    do
        if [ $ip == master1 ];then
            scp /app/k8s/bin/etcd_servie.sh root@$ip:/root/ 
            ssh root@$ip "bash /root/etcd_servie.sh master1 ‘172.16.1.51‘" 
            judge ‘master1 edcd配置文件完成‘ $? 
        elif [ $ip == master2 ];then
            scp /app/k8s/bin/etcd_servie.sh root@$ip:/root/
            ssh root@$ip "bash /root/etcd_servie.sh master2 ‘172.16.1.52‘"
            judge ‘master2 edcd配置文件完成‘ $?
        elif [ $ip == master3 ];then
            scp /app/k8s/bin/etcd_servie.sh root@$ip:/root/
            ssh root@$ip "bash /root/etcd_servie.sh master3 ‘172.16.1.53‘" 
            judge ‘master3 edcd配置文件完成‘ $?
        fi
    done
    
    # 启动etcd
    for ip in master1 master2 master3
    do
        ssh root@$ip "systemctl daemon-reload  && systemctl enable --now etcd"
        judge "$ip 启动etcd服务中 " $?
    done
    
    # 查看启动状态
    echo -e "\033[42;37m \t<<-------------------- 查看EDCT数据库是否启动成功 -------------------->>  \033[0m \n"
    sleep 2
    for ip in master1 master2 master3
    do
        ssh root@$ip ‘systemctl status etcd &> /dev/null‘
        etcd_status_code=$?
        if [ "$etcd_status_code" -eq 0 ];then
            echo -e "\033[32m $ip etcd启动成功 \033[0m \n"
        else
            echo -e "\033[41;36m $ip etcd启动失败 删除/var/lib/etcd/下缓存文件试试或则看看etcd注册的配置文件是否准确 \033[0m \n"
            exit 0
        fi
    done
}


# 2021/07/20 上面已成功
# 测试etcd集群
function test_etcd(){
    ETCDCTL_API=3 etcdctl     --cacert=/etc/etcd/ssl/etcd.pem     --cert=/etc/etcd/ssl/etcd.pem     --key=/etc/etcd/ssl/etcd-key.pem     --endpoints="https://172.16.1.51:2379,https://172.16.1.52:2379,https://172.16.1.53:2379"     endpoint status --write-out=‘table‘

    judge ‘etcd 集群建立通信成功‘ $?

}


# 2021/7/21上面已测试完成
# 创建master CA节点证书
function create_master_ca_cert(){
    # 创建k8s集群根证书目录
    mkdir /opt/cert/k8s/ -p
    cd /opt/cert/k8s/
    # 配置k8s集群根ca证书配置
    cat > /opt/cert/k8s/ca-config.json << EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF
    
    # 创建k8s集群根CA证书签名请求文件
    cat > /opt/cert/k8s/ca-csr.json << EOF
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "ShangHai",
            "ST": "ShangHai"
        }
    ]
}
EOF
    
    # 生成k8s根证书私钥公钥文件
    cd /opt/cert/k8s/ && 
    cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
    judge ‘k8s根证书私钥公钥文件生成完毕‘ $?
    
}


# 创建kube-apiserver证书
function create_kube_apiserver_cert(){
    # 创建apiserver json证书配置
    cd /opt/cert/k8s/
    cat > /opt/cert/k8s/server-csr.json << EOF
{
    "CN": "kubernetes",
    "hosts": [
        "127.0.0.1",
        "192.168.15.51",
        "192.168.15.52",
        "192.168.15.53",
        "192.168.15.54",
        "192.168.15.55",
        "192.168.15.56",
        "10.96.0.1",
        "kubernetes",
        "kubernetes.default",
        "kubernetes.default.svc",
        "kubernetes.default.svc.cluster",
        "kubernetes.default.svc.cluster.local"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "ShangHai",
            "ST": "ShangHai"
        }
    ]
}
EOF

    # 生成apiserver证书私钥公钥文件
    cd /opt/cert/k8s/ &&  cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server 
    judge ‘apiserver证书私钥公钥文件生成完毕‘ $? 
}


# 创建controller-manager的证书
function create_kube_controller_manager_cert(){
    cd /opt/cert/k8s/ &&
    # 创建controller_manager_json证书配置
    cat > /opt/cert/k8s/kube-controller-manager-csr.json << EOF
{
    "CN": "system:kube-controller-manager",
    "hosts": [
        "127.0.0.1",
        "192.168.15.51",
        "192.168.15.52",
        "192.168.15.53",
        "192.168.15.56"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing",
            "O": "system:kube-controller-manager",
            "OU": "System"
        }
    ]
}
EOF
        
    # 生成controller_manager_json证书私钥公钥文件
    cd /opt/cert/k8s/ && 
    cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager
    judge ‘controller_manager_json证书私钥公钥文件生成完毕‘ $?
}


# 创建kube-scheduler的证书
function create_kube_scheduler_cert(){
    cd /opt/cert/k8s/ &&
    cat > /opt/cert/k8s/kube-scheduler-csr.json << EOF
{
    "CN": "system:kube-scheduler",
    "hosts": [
        "127.0.0.1",
        "192.168.15.51",
        "192.168.15.52",
        "192.168.15.53",
        "192.168.15.56"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing",
            "O": "system:kube-scheduler",
            "OU": "System"
        }
    ]
}
EOF
    
    # 生成kube_scheduler_json证书私钥公钥文件
    cd /opt/cert/k8s/ && 
    cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-scheduler-csr.json | cfssljson -bare kube-scheduler
    judge ‘kube_scheduler_json证书私钥公钥文件生成完毕‘ $?
}


# 创建kube-proxy的证书
function create_kube_proxy_cert(){
    cd /opt/cert/k8s/ &&
    cat > /opt/cert/k8s/kube-proxy-csr.json << EOF
{
    "CN":"system:kube-proxy",
    "hosts":[],
    "key":{
        "algo":"rsa",
        "size":2048
    },
    "names":[
        {
            "C":"CN",
            "L":"BeiJing",
            "ST":"BeiJing",
            "O":"system:kube-proxy",
            "OU":"System"
        }
    ]
}
EOF

    # 生成kube_proxy_json证书私钥公钥文件
    cd  /opt/cert/k8s/ &&
    cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
    judge ‘kube_proxy_json证书私钥公钥文件生成完毕‘ $?
}


# 创建集群管理员kubectl证书
function create_cluster_kubectl_cert(){
    cd /opt/cert/k8s/ &&
    cat > admin-csr.json << EOF
{
     "CN":"admin",
     "key":{
        "algo":"rsa",
        "size":2048
    },
    "names":[
        {
            "C":"CN",
            "L":"BeiJing",
            "ST":"BeiJing",
            "O":"system:masters",
            "OU":"System"
        }
    ]
}
EOF

    # 生成kubectl_json证书私钥公钥文件
    cd  /opt/cert/k8s/ &&
    cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
    judge ‘kubectl_json证书私钥公钥文件生成完毕‘ $?

}


# 颁发k8s集群证书
function issue_k8s_cert(){
    mkdir -pv /etc/kubernetes/ssl
    cp -p /opt/cert/k8s/{ca*pem,server*pem,kube-controller-manager*pem,kube-scheduler*.pem,kube-proxy*pem,admin*.pem} /etc/kubernetes/ssl/ 
    
    for i in master2 master3
    do
        ssh root@$i "mkdir -pv /etc/kubernetes/ssl"
        echo -e "\033[33m \t---------- $i 正在拷贝k8s集群证书配置文件... ----------\t \033[0m\n" 
        scp -q /etc/kubernetes/ssl/* root@$i:/etc/kubernetes/ssl/
        judge "$i k8s集群证书拷贝完成" $?
    done

}


# 分发k8s服务组件到每个master
function issue_k8s_server(){
    cd /opt/data/kubernetes/server/bin/ &&
    # 分发k8s master组件
    for i in m1 m2 m3 
    do
        scp kube-apiserver kube-controller-manager kube-proxy kubectl kubelet kube-scheduler root@$i:/usr/local/sbin/
        judge "$i k8s组件分发完毕" $?
    done
    
}


# 创建k8s集群kube-controller-manager.kubeconfig配置文件
function create_controller_manage_conf(){
   # 创建kube-controller-manager.kubeconfig 
   # 指定api服务的地址
   export KUBE_APISERVER="https://192.168.15.56:8443"
   
   # 创建k8s集群配置文件目录
   mkdir -pv /etc/kubernetes/cfg/ 
   cd /etc/kubernetes/cfg/ &&
  
   # 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=kube-controller-manager.kubeconfig
  
  judge "controller-manager集群参数已设置" $?
  
  # 设置客户端认证参数
  kubectl config set-credentials "kube-controller-manager"   --client-certificate=/etc/kubernetes/ssl/kube-controller-manager.pem   --client-key=/etc/kubernetes/ssl/kube-controller-manager-key.pem   --embed-certs=true   --kubeconfig=kube-controller-manager.kubeconfig
  
  judge "controller-manager集群客户端认证参数已设置" $?

  # 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
  kubectl config set-context default   --cluster=kubernetes   --user="kube-controller-manager"   --kubeconfig=kube-controller-manager.kubeconfig
  
  judge "controller-manager集群上下文参数已设置" $?

  # 配置默认上下文
  kubectl config use-context default --kubeconfig=kube-controller-manager.kubeconfig
 
  judge "controller-manager默认上下文已设置成功" $?
  
  echo -e "\033[42;37m \t<<-------------------- k8s集群kube-controller-manager.kubeconfig配置文件完毕 -------------------->>  \033[0m \n"
  
}


# 创建kube-scheduler.kubeconfig配置文件
function create_scheduler_config(){
    # 指定api服务的地址
    export KUBE_APISERVER="https://192.168.15.56:8443"
    
    
    cd /etc/kubernetes/cfg/ &&
    
    # 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=kube-scheduler.kubeconfig
      
    judge "k8s集群scheduler参数已设置" $?
      
    # 设置客户端认证参数
    kubectl config set-credentials "kube-scheduler"       --client-certificate=/etc/kubernetes/ssl/kube-scheduler.pem       --client-key=/etc/kubernetes/ssl/kube-scheduler-key.pem       --embed-certs=true       --kubeconfig=kube-scheduler.kubeconfig  
      
    judge "k8s集群scheduler客户端认证参数已设置" $? 

    # 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
    kubectl config set-context default       --cluster=kubernetes       --user="kube-scheduler"       --kubeconfig=kube-scheduler.kubeconfig
      
    judge "k8s集群scheduler上下文参数参数已设置" $?
      
    # 配置默认上下文
    kubectl config use-context default --kubeconfig=kube-scheduler.kubeconfig
    
    judge "k8s集群scheduler默认上下文参数参数已设置" $?

}


# 创建kube-proxy.kubeconfig集群配置文件
function create_proxy_conf(){

    export KUBE_APISERVER="https://192.168.15.56:8443"
    
    cd /etc/kubernetes/cfg/ &&
    
    # 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=kube-proxy.kubeconfig

    judge "proxy 集群配置参数完成" $?
    
    # 设置客户端认证参数
    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
      
    judge "proxy客服端认证参数配置完成" $?

    # 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
    kubectl config set-context default       --cluster=kubernetes       --user="kube-proxy"       --kubeconfig=kube-proxy.kubeconfig
      
    judge "proxy上下文参数配置完成" $?
    
    # 配置默认上下文
    kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
    
    judge "proxy上下文参数配置完成" $?
    
}


# 创建超级管理员kubectl的集群配置文件
function create_kubectl_conf(){

    export KUBE_APISERVER="https://192.168.15.56:8443"
    
    cd /etc/kubernetes/cfg/ &&
    
    # 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=admin.kubeconfig
      
    judge "kubectl集群参数配置完成" $?
    
    # 设置客户端认证参数
    kubectl config set-credentials "admin"       --client-certificate=/etc/kubernetes/ssl/admin.pem       --client-key=/etc/kubernetes/ssl/admin-key.pem       --embed-certs=true       --kubeconfig=admin.kubeconfig
      
    judge "kubectl客户端认证参数配置完成"   $?
      
    # 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
    kubectl config set-context default       --cluster=kubernetes       --user="admin"       --kubeconfig=admin.kubeconfig  
      
    judge "kubectl上下文参数参数配置完成"  $?
      
    # 配置默认上下文
    kubectl config use-context default --kubeconfig=admin.kubeconfig  
    
    judge "kubectl默认上下文配置完成" $?
}


# 颁发集群配置文件
function issue_k8s_cluster_conf_file(){
    for i in m2 m3
    do
        ssh root@$i  "mkdir -pv /etc/kubernetes/cfg"
        scp /etc/kubernetes/cfg/*.kubeconfig root@$i:/etc/kubernetes/cfg/
        judge "controller scheduler proxy kubectl k8s组件的配置文件分发到$i完成" $?
    done

}


# 创建集群token
function create_cluster_token(){
    # 只需要创建一次
    # 必须要用自己机器创建的Token
    TLS_BOOTSTRAPPING_TOKEN=`head -c 16 /dev/urandom | od -An -t x | tr -d ‘ ‘`
    cd /opt/cert/k8s &&
    cat > /opt/cert/k8s/token.csv << EOF
${TLS_BOOTSTRAPPING_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF
    
    # 分发集群token，用于集群TLS认证
    for i in m1 m2 m3 
    do 
        scp /opt/cert/k8s/token.csv root@$i:/etc/kubernetes/cfg/
        judge "$i 集群token分发完毕" $?
    done

}


# 部署各个组件（安装各个组件，使其可以正常工作）
# 安装kube-apiserver
function create_apiserver_conf(){
    # 创建kube-apiserver的配置文件
    # 在所有的master节点上执行
    # 获取每台主机的IP地址
    KUBE_APISERVER_IP=`hostname -i`
    
    cat > /etc/kubernetes/cfg/kube-apiserver.conf << EOF
KUBE_APISERVER_OPTS="--logtostderr=false \--v=2 \--log-dir=/var/log/kubernetes/kube-apiserver/ \--advertise-address=${KUBE_APISERVER_IP} \--default-not-ready-toleration-seconds=360 \--default-unreachable-toleration-seconds=360 \--max-mutating-requests-inflight=2000 \--max-requests-inflight=4000 \--default-watch-cache-size=200 \--delete-collection-workers=2 \--bind-address=0.0.0.0 \--secure-port=6443 \--allow-privileged=true \--service-cluster-ip-range=10.96.0.0/16 \--service-node-port-range=30000-52767 \--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \--authorization-mode=RBAC,Node \--enable-bootstrap-token-auth=true \--token-auth-file=/etc/kubernetes/cfg/token.csv \--kubelet-client-certificate=/etc/kubernetes/ssl/server.pem \--kubelet-client-key=/etc/kubernetes/ssl/server-key.pem \--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 \--audit-log-maxage=30 \--audit-log-maxbackup=3 \--audit-log-maxsize=100 \--audit-log-path=/var/log/kubernetes/k8s-audit.log \--etcd-servers=https://172.16.1.51:2379,https://172.16.1.52:2379,https://172.16.1.53:2379 \--etcd-cafile=/etc/etcd/ssl/ca.pem \--etcd-certfile=/etc/etcd/ssl/etcd.pem \--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem"
EOF
}


# 分发apiserver配置文件到m2和m3
function excute_apiserver_conf(){
    for i in ‘192.168.15.52‘ "192.168.15.53"
    do
        scp /etc/kubernetes/cfg/kube-apiserver.conf root@$i:/etc/kubernetes/cfg/
        judge "$i apiserver 配置文件完成" $?
        # 更改master apiserver配置文件适配自己
        ssh $i "sed -i "s#--advertise-address=‘192.168.15.51‘#--advertise-address=${i}#g /etc/kubernetes/cfg/kube-apiserver.conf""
    done   
}


# 所有master注册kube-apiserver的服务
function register_apiserver(){

    # 在所有的master节点上执行
    cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-apiserver.conf
ExecStart=/usr/local/sbin/kube-apiserver \$KUBE_APISERVER_OPTS
Restart=on-failure
RestartSec=10
Type=notify
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

    # 重载
    systemctl daemon-reload
    judge "master1 apiserver 服务注册成功" $?
    
    # 分发apiserver 服务注册
    for i in master2 master3 
    do
        scp /usr/lib/systemd/system/kube-apiserver.service root@$i:/usr/lib/systemd/system/
        ssh root@$i "systemctl daemon-reload"
        judge "$i apiserver 服务重载成功" $?
    done
    
    # 创建日志目录
    for i in master1 master2 master3 
    do
        ssh $i "mkdir /var/log/kubernetes/kube-apiserver/ -pv"
        judge "$i 创建apiserver日志记录目录 /var/log/kubernetes/kube-apiserver/ 成功" $?
    done

    # 启动apiserver服务
    for i in master1 master2 master3 
    do
        ssh $i "systemctl enable --now kube-apiserver"
        judge "$i apiserver 启动成功" $?        
    done

}


# 对kube-apiserver做高可用
function kube_apiserver_keepalived(){
    # 安装高可用软件
    # 三台master节点都需要安装
    # keepalived + haproxy
    for i in master1 master2 master3
    do
        ssh $i ‘echo -e "\033[33m ---------- $i 正在下载keepalived 和 haproxy 请稍后... ---------- \033[0m" &&  
        yum install -y keepalived haproxy &> /dev/null‘
        judge "$i keepalived 和 haproxy下载成功" $?
    done
}


# 修改keepalived配置文件
function modifi_keep(){
    # 根据节点不同，修改的配置也不同
    mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf_bak &&
        cd /etc/keepalived/ &&
        KUBE_APISERVER_IP=`hostname -i`
cat > /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
global_defs {
    router_id LVS_DEVEL
}
vrrp_script chk_kubernetes {
    script "/etc/keepalived/check_kubernetes.sh"
    interval 2
    weight -5
    fall 3
    rise 2
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    mcast_src_ip ${KUBE_APISERVER_IP}
    virtual_router_id 51
    priority 100
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass K8SHA_KA_AUTH
    }
    virtual_ipaddress {
        192.168.15.56
    }
}
EOF



for i in master2 master3
do 
    if [ ! -f /etc/keepalived/keepalived.conf_bak ];then
        ssh $i "mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf_bak "
    fi
    scp /etc/keepalived/keepalived.conf root@$i:/etc/keepalived/
    ssh $i "sed -i \"s#mcast_src_ip 192\.168\.15\.51#mcast_src_ip \`hostname -i\`#g\"  /etc/keepalived/keepalived.conf"
    if [ $i == ‘master2‘ ];then
       ssh root@$i "sed -i ‘s#priority 100#priority 90#g‘  /etc/keepalived/keepalived.conf" 
       judge "$i 机器优先级修改成功" $?
    else 
       ssh root@$i "sed -i ‘s#priority 100#priority 80#g‘  /etc/keepalived/keepalived.conf"
       judge "$i 机器优先级修改成功" $?
    fi
    
    ssh $i "grep \`hostname -i\` /etc/keepalived/keepalived.conf " 
    judge "$i keepalived配置文件ip修改成功" $?
done

# 设置监控脚本
cat > /etc/keepalived/check_kubernetes.sh <<EOF
#!/bin/bash

function chech_kubernetes() {
    for ((i=0;i<5;i++));do
        apiserver_pid_id=$(pgrep kube-apiserver)
        if [[ ! -z $apiserver_pid_id ]];then
            return
        else
            sleep 2
        fi
        apiserver_pid_id=0
    done
}

# 1:running  0:stopped
check_kubernetes
if [[ $apiserver_pid_id -eq 0 ]];then
    /usr/bin/systemctl stop keepalived
    exit 1
else
    exit 0
fi
EOF

# 设置执行权限
chmod +x /etc/keepalived/check_kubernetes.sh

# 分发监控脚本
for i in master2 master3
do
    scp /etc/keepalived/check_kubernetes.sh root@$i:/etc/keepalived/
    judge "$i 脚本分发成功" $?
done

# 启动高可用keepalived
for i in master1 master2 master3
do
    ssh root@$i "systemctl enable --now keepalived"
    judge "$i keepalived 启动成功" $?
done
}


# 配置haproxy文件 减少单台apiserver压力
function modifi_haproxy(){
    cat > /etc/haproxy/haproxy.cfg <<EOF
global
  maxconn  2000
  ulimit-n  16384
  log  127.0.0.1 local0 err
  stats timeout 30s

defaults
  log global
  mode  http
  option  httplog
  timeout connect 5000
  timeout client  50000
  timeout server  50000
  timeout http-request 15s
  timeout http-keep-alive 15s

frontend monitor-in
  bind *:33305
  mode http
  option httplog
  monitor-uri /monitor

listen stats
  bind    *:8006
  mode    http
  stats   enable
  stats   hide-version
  stats   uri       /stats
  stats   refresh   30s
  stats   realm     Haproxy\ Statistics
  stats   auth      admin:admin

frontend k8s-master
  bind 0.0.0.0:8443
  bind 127.0.0.1:8443
  mode tcp
  option tcplog
  tcp-request inspect-delay 5s
  default_backend k8s-master

backend k8s-master
  mode tcp
  option tcplog
  option tcp-check
  balance roundrobin
  default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
  server kubernetes-master-01    192.168.15.51:6443  check inter 2000 fall 2 rise 2 weight 100
  server kubernetes-master-02    192.168.15.52:6443  check inter 2000 fall 2 rise 2 weight 100
  server kubernetes-master-03    192.168.15.53:6443  check inter 2000 fall 2 rise 2 weight 100
EOF

# 分发haproxy配置 启动haproxy
for i in master1 master2 master3
do
    scp /etc/haproxy/haproxy.cfg root@$i:/etc/haproxy/
    ssh $i "systemctl enable --now haproxy.service"
    judge "$i haproxy 启动成功" $?
done
}


# 部署TLS(apiserver 动态签署颁发到Node节点，实现证书签署自动化)
function deploy_tls(){
    export KUBE_APISERVER="https://192.168.15.56:8443"
    token=`awk -F"," ‘{print $1}‘ /etc/kubernetes/cfg/token.csv`
    
    cd /etc/kubernetes/cfg &&
    # 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=/etc/kubernetes/cfg/kubelet-bootstrap.kubeconfig

# 设置客户端认证参数,此处token必须用上自己生成的token.csv中的token
kubectl config set-credentials "kubelet-bootstrap"   --token=$token   --kubeconfig=/etc/kubernetes/cfg/kubelet-bootstrap.kubeconfig

# 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
kubectl config set-context default   --cluster=kubernetes   --user="kubelet-bootstrap"   --kubeconfig=/etc/kubernetes/cfg/kubelet-bootstrap.kubeconfig

# 配置默认上下文
kubectl config use-context default --kubeconfig=/etc/kubernetes/cfg/kubelet-bootstrap.kubeconfig

# 颁发集群bootstrap配置文件
for i in master2 master3
do
    scp /etc/kubernetes/cfg/kubelet-bootstrap.kubeconfig root@$i:/etc/kubernetes/cfg/
    judge "$i bootstrap配置文件颁发完毕" $?
done

# 创建TLS低权限用户
kubectl create clusterrolebinding kubelet-bootstrap  --clusterrole=system:node-bootstrapper  --user=kubelet-bootstrap
judge "kubernetes 低权限用户kubelet-bootstrap创建成功" $?
}


# 部署contorller-manager
function deploy_contorller_manager(){
    # 需要在三台master节点上执行
cat > /etc/kubernetes/cfg/kube-controller-manager.conf << EOF
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \--v=2 \--log-dir=/var/log/kubernetes/kube-controller-manager/ \--leader-elect=true \--cluster-name=kubernetes \--bind-address=127.0.0.1 \--allocate-node-cidrs=true \--cluster-cidr=10.244.0.0/12 \--service-cluster-ip-range=10.96.0.0/16 \--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 \--kubeconfig=/etc/kubernetes/cfg/kube-controller-manager.kubeconfig \--tls-cert-file=/etc/kubernetes/ssl/kube-controller-manager.pem \--tls-private-key-file=/etc/kubernetes/ssl/kube-controller-manager-key.pem \--experimental-cluster-signing-duration=87600h0m0s \--controllers=*,bootstrapsigner,tokencleaner \--use-service-account-credentials=true \--node-monitor-grace-period=10s \--horizontal-pod-autoscaler-use-rest-clients=true"
EOF

# 注册服务
# 需要在三台master节点上执行
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-controller-manager.conf
ExecStart=/usr/local/sbin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF

for i in master2 master3 
do
    scp /etc/kubernetes/cfg/kube-controller-manager.conf $i:/etc/kubernetes/cfg/
    judge "$i controller-manager 配置文件完成" $?
    
    scp /usr/lib/systemd/system/kube-controller-manager.service $i:/usr/lib/systemd/system/
    judge "$i controller-manager system注册服务完成" $?
done

for i in master1 master2 master3
do
    ssh $i "mkdir -pv /var/log/kubernetes/kube-controller-manager/"
    ssh $i "systemctl daemon-reload"
    ssh $i "systemctl enable --now kube-controller-manager.service"
    judge "$i 启动controller服务成功" $?
done

}


# 部署kube-scheduler
function deploy_kube_scheduler(){
    # 三台机器上都需要执行
cat > /etc/kubernetes/cfg/kube-scheduler.conf << EOF
KUBE_SCHEDULER_OPTS="--logtostderr=false \--v=2 \--log-dir=/var/log/kubernetes/kube-scheduler \--kubeconfig=/etc/kubernetes/cfg/kube-scheduler.kubeconfig \--leader-elect=true \--master=http://127.0.0.1:8080 \--bind-address=127.0.0.1 "
EOF

# 三台节点上都需要执行
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-scheduler.conf
ExecStart=/usr/local/sbin/kube-scheduler \$KUBE_SCHEDULER_OPTS
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF


for i in master1 master2 master3 
do
    scp /etc/kubernetes/cfg/kube-scheduler.conf $i:/etc/kubernetes/cfg/
    ssh $i "mkdir -pv /var/log/kubernetes/kube-scheduler/"
    judge ‘scheduler日志目录 创建成功‘ $?
    scp /usr/lib/systemd/system/kube-scheduler.service $i:/usr/lib/systemd/system/
    judge "$i scheduler system服务注册成功" $?
    ssh $i "systemctl daemon-reload"
    ssh $i "systemctl enable --now kube-scheduler"
    judge "$i scheduler启动成功" $?

done
}


# 部署kubelet服务
function deploy_kubelet(){
    # 创建kubelet.conf服务配置文件
    KUBE_HOSTNAME=`hostname`

cat > /etc/kubernetes/cfg/kubelet.conf << EOF
KUBELET_OPTS="--logtostderr=false \--v=2 \--log-dir=/var/log/kubernetes/kubelet \--hostname-override=${KUBE_HOSTNAME} \--container-runtime=docker \--kubeconfig=/etc/kubernetes/cfg/kubelet.kubeconfig \--bootstrap-kubeconfig=/etc/kubernetes/cfg/kubelet-bootstrap.kubeconfig \--config=/etc/kubernetes/cfg/kubelet-config.yaml \--cert-dir=/etc/kubernetes/ssl \--image-pull-progress-deadline=15m \--pod-infra-container-image=registry.cn-shanghai.aliyuncs.com/mpd_k8s/pause:3.2"
EOF

# 分发配置文件kubelet.conf配置文件
for i in master2 master3
do
    scp /etc/kubernetes/cfg/kubelet.conf root@$i:/etc/kubernetes/cfg/
    judge "$i kubelet.conf文件分发完毕" $?
done

# 修改配置文件
for i in master2 master3
do
    ssh $i "sed -i "s#`hostname`#\`hostname\`#g" /etc/kubernetes/cfg/kubelet.conf "
    judge "$i 修改kubelet.conf配置文件成功" $?
done

# 创建kubelet日志目录
for i in master1 master2 master3
do
    mkdir -pv /var/log/kubernetes/kubelet
    judge "$i kubelet 日志目录创建成功" $?
done

# 创建kubelet-config.yaml配置
KUBE_HOSTNAME=`hostname -i`
cat > /etc/kubernetes/cfg/kubelet-config.yaml << EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: ${KUBE_HOSTNAME}
port: 10250
readOnlyPort: 10255
cgroupDriver: systemd
clusterDNS:
- 10.96.0.2
clusterDomain: cluster.local
failSwapOn: false
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/ssl/ca.pem
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
evictionHard:
  imagefs.available: 15%
  memory.available: 100Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
maxOpenFiles: 1000000
maxPods: 110
EOF

# 分发kubelet-config.yaml配置文件
for i in master2 master3
do
    scp  /etc/kubernetes/cfg/kubelet-config.yaml root@$i:/etc/kubernetes/cfg/
    judge "$i kubelet-config.yaml分发完毕" $?
done

# 修改kubelet-config.yaml配置文件
for i in master2 master3 
do
    ssh $i "sed -i "s#`hostname -i`#\`hostname -i\`#g" /etc/kubernetes/cfg/kubelet-config.yaml " 
done

# 验证kubelet-config.yaml文件
for i in master2 master3
do 
    ssh $i  "grep \`hostname -i\` /etc/kubernetes/cfg/kubelet-config.yaml"
    judge "$i kubelet-config.yaml文件OK" $?
done

# 注册kubelet的服务
# 需要在三台master节点上执行
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
After=docker.service

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kubelet.conf
ExecStart=/usr/local/sbin/kubelet \$KUBELET_OPTS
Restart=on-failure
RestartSec=10
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

# 分发kubelet的systemd注册服务
for i in master2 master3
do
    scp /usr/lib/systemd/system/kubelet.service root@$i:/usr/lib/systemd/system/
    judge "$i kubelet的systemd注册服务完成" $?
done

# 重载kubelet system服务
for i in master1 master2 master3 
do
    ssh $i "systemctl daemon-reload" &> /dev/null
    judge "$i systemd重载成功" $?
done

# 启动kubelet服务
for i in master1 master2 master3
do
    ssh $i "systemctl enable --now kubelet.service"
    judge "$i kubelet服务启动成功" $?
done


}


# 部署kube-proxy
function deploy_kube_proxy(){
    # 创建配置文件
    # 需要在三台master节点上执行
cat > /etc/kubernetes/cfg/kube-proxy.conf << EOF
KUBE_PROXY_OPTS="--logtostderr=false \--v=2 \--log-dir=/var/log/kubernetes/kube-proxy \--config=/etc/kubernetes/cfg/kube-proxy-config.yaml"
EOF

# 分发kube-proxy.conf配置文件
for i in master2 master3 
do 
    scp /etc/kubernetes/cfg/kube-proxy.conf root@$i:/etc/kubernetes/cfg/
    judge "$i kube-proxy.conf配置成功" $?
done

# 创建日志目录
for i in master1 master2 master3 
do
    ssh $i "mkdir -pv /var/log/kubernetes/kube-proxy"
done

# 创建kube-proxy-config.yaml文件
# 需要在三台master节点上执行
KUBE_HOSTNAME=`hostname -i`
HOSTNAME=`hostname`
cat > /etc/kubernetes/cfg/kube-proxy-config.yaml << EOF
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: ${KUBE_HOSTNAME}
healthzBindAddress: ${KUBE_HOSTNAME}:10256
metricsBindAddress: ${KUBE_HOSTNAME}:10249
clientConnection:
  burst: 200
  kubeconfig: /etc/kubernetes/cfg/kube-proxy.kubeconfig
  qps: 100
hostnameOverride: ${HOSTNAME}
clusterCIDR: 10.96.0.0/16
enableProfiling: true
mode: "ipvs"
kubeProxyIPTablesConfiguration:
  masqueradeAll: false
kubeProxyIPVSConfiguration:
  scheduler: rr
  excludeCIDRs: []
EOF

# 分发kube-proxy-config.yaml文件
for i in master2 master3 
do 
    scp /etc/kubernetes/cfg/kube-proxy-config.yaml root@$i:/etc/kubernetes/cfg/
    judge "$i kube-proxy-config.yaml 配置成功" $?
done

# 修改kube-proxy-config.yaml文件
for i in master2 master3 
do 
    ssh $i "sed -i "s#`hostname -i`#\`hostname -i\`#g" /etc/kubernetes/cfg/kube-proxy-config.yaml"
    ssh $i "sed -i "s#`hostname`#\`hostname\`#g" /etc/kubernetes/cfg/kube-proxy-config.yaml"
    judge "$i kube-proxy-config.yaml文件修改成功" $?
done

# 注册system服务
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Proxy
After=network.target

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-proxy.conf
ExecStart=/usr/local/sbin/kube-proxy \$KUBE_PROXY_OPTS
Restart=on-failure
RestartSec=10
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

# 分发kube-proxy system服务
for i in master2 master3
do 
    scp /usr/lib/systemd/system/kube-proxy.service root@$i:/usr/lib/systemd/system/
    judge "$i kube-proxy system服务注册成功" $?
done

# 重载system启动kube-proxy服务
for i in master1 master2 master3 
do 
    ssh $i "systemctl daemon-reload"
    judge "$i system重载成功" $?
    ssh $i "systemctl enable --now kube-proxy"
    judge "kube-proxy 服务启动成功" $?
done
}


# 查看集群节点加入请求
function add_k8s_cluster(){
    echo -e "\033[42;37m \t<<-------------------- 查看k8s集群节点加入请求 -------------------->> \033[0m \n"
    kubectl get csr
    # 批准加入
    kubectl certificate approve `kubectl get csr | grep "Pending" | awk ‘{print $1}‘`
    # 验证
    # 睡眠3秒等待集群加入生效
    echo -e "\033[33m \t---------- 睡眠3秒等待集群加入生效... ----------\t\n"
    sleep 3
    num=0
    for i in `kubectl get nodes | awk ‘{print $2}‘ | tail -3`
    do
        if [ $i == ‘Ready‘ ];then
          let num+=1   
        fi
    done
    [ $num -eq 3 ] && echo -e "\033[32m master节点已成功加入到集群中 \033[0m \n" ||  echo -e "\033[41;36m 加入k8s集群失败（不用管这是个bug） \033[0m \n" 
}


# 安装网络flannel插件
function deploy_flannel(){
    if [ -f /opt/data/flannel-v* ];then
        judge "flannel网络插件存在" 0
    else
        judge "flannel网络插件不存在请上传网络插件到/opt/data目录" 1
    fi
    
    tar -xf /opt/data/flannel-v0.11.0-linux-amd64.tar.gz -C /opt/data/

    # 分发flannel插件到其他master节点
    for i in master1 master2 master3
    do
        scp /opt/data/{flanneld,mk-docker-opts.sh} root@$i:/usr/local/sbin/
        judge "$i flannel插件分发成功" $?
    done

    # 将flannel配置写入集群数据库
    etcdctl     --ca-file=/etc/etcd/ssl/ca.pem     --cert-file=/etc/etcd/ssl/etcd.pem     --key-file=/etc/etcd/ssl/etcd-key.pem     --endpoints="https://172.16.1.51:2379,https://172.16.1.52:2379,https://172.16.1.53:2379"     mk /coreos.com/network/config ‘{"Network":"10.244.0.0/12", "SubnetLen": 21, "Backend": {"Type": "vxlan", "DirectRouting": true}}‘
    judge "flannel信息已成功写入到数据库ETCD中" $?
        
    # 验证
    etcdctl     --ca-file=/etc/etcd/ssl/ca.pem     --cert-file=/etc/etcd/ssl/etcd.pem     --key-file=/etc/etcd/ssl/etcd-key.pem     --endpoints="https://172.16.1.51:2379,https://172.16.1.52:2379,https://172.16.1.53:2379"     get /coreos.com/network/config
    judge "flannel信息已成功写入到数据库集群ETCD中" $?

    # 注册flannel服务
    cat > /usr/lib/systemd/system/flanneld.service << EOF
[Unit]
Description=Flanneld address
After=network.target
After=network-online.target
Wants=network-online.target
After=etcd.service
Before=docker.service

[Service]
Type=notify
ExecStart=/usr/local/sbin/flanneld \  -etcd-cafile=/etc/etcd/ssl/ca.pem \  -etcd-certfile=/etc/etcd/ssl/etcd.pem \  -etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \  -etcd-endpoints=https://172.16.1.51:2379,https://172.16.1.52:2379,https://172.16.1.53:2379 \  -etcd-prefix=/coreos.com/network \  -ip-masq
ExecStartPost=/usr/local/sbin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=always
RestartSec=5
StartLimitInterval=0
[Install]
WantedBy=multi-user.target
RequiredBy=docker.service
EOF

    # 分发flannel system管理配置文件
    for i in master2 master3 
    do
        scp /usr/lib/systemd/system/flanneld.service root@$i:/usr/lib/systemd/system/
        judge "$i flannel system管理配置文件完成" $?
    done

    # 修改docker启动文件
    # 让flannel接管docker网络
    sed -i ‘/ExecStart/s/\(.*\)/#\1/‘ /usr/lib/systemd/system/docker.service
    sed -i ‘/ExecReload/a ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run/containerd/containerd.sock‘ /usr/lib/systemd/system/docker.service
    sed -i ‘/ExecReload/a EnvironmentFile=-/run/flannel/subnet.env‘ /usr/lib/systemd/system/docker.service
    for i in master2 master3
    do 
        scp /usr/lib/systemd/system/docker.service root@$i:/usr/lib/systemd/system/
        judge "$i 修改docker启动文件成功" $?
    done
    echo -e "\033[42;37m \t<<-------------------- master集群修改docker启动文件（让flannel接管docker网络）完成 -------------------->>  \033[0m \n" 

    # 分发systemd flannel服务配置
    for i in master1 master2 master3
    do
        ssh root@$i "systemctl daemon-reload"
        judge "systemd重载服务成功" $?

        ssh root@$i "systemctl enable --now flanneld"
        judge "$i flanneld 启动成功" $?

        ssh root@$i "systemctl restart docker"
        judge "$i docker 启动成功" $?
    done

    # 验证集群网络通信
    

}


# 安装集群DNS
function deploy_ClusterDns(){
    # 只需要在一台节点上执行即可
    # 下载DNS安装配置文件包
    echo -e "\033[33m \t---------- 下载DNS安装配置文件包请稍后... ----------\t\n" 
    wget https://github.com/coredns/deployment/archive/refs/heads/master.zip -P /app/k8s/tar/ 
    if [ $? -eq 0 ];then
        echo -e "\033[42;37m \t<<-------------------- DNS安装配置文件包下载成功 -------------------->> \033[0m \n"
    else
        echo -e "\033[33m \t---------- 下载DNS安装配置文件包失败 (正在准备第二次尝试)... ----------\t\n"
        echo ‘nameserver 8.8.8.8‘ >> /etc/resolv.conf
        wget https://github.com/coredns/deployment/archive/refs/heads/master.zip -P /app/k8s/tar/
        if [ $? -eq 0 ];then
            echo -e "\033[42;37m \t<<-------------------- DNS安装配置文件包下载成功 -------------------->> \033[0m \n"
        else 
            echo -e "\033[41;36m DNS安装配置文件包下载失败请检查网络 \033[0m \n"
            exit 0
        fi  
    fi
    
    # 安装unzip命令
    yum install -y unzip &> /dev/null 
    judge "unzip 命令安装成功" $?

    # 解压DNS配置文件
    cd /app/k8s/tar && unzip  master.zip &> /dev/null
    cd /app/k8s/tar/deployment-master/kubernetes &&  echo -e "\033[33m \t---------- 创建dns pod容器 ----------\t\n";./deploy.sh -i 10.96.0.2 -s | kubectl apply -f -
    
    # 验证集群DNS
    # 睡眠90秒等待集群DNS创建生效
    echo -e "\033[33m \t---------- 睡眠90秒等待创建POD集群DNS生效... ----------\t\n"
    sleep 90
    kube_dns_pod_ready=`kubectl get pods -n kube-system | tail -1 | awk ‘{print $2}‘`
    if [[ $kube_dns_pod_ready = ‘1/1‘ ]];then
        echo -e "\033[42;37m \t<<-------------------- k8s集群DNS生效 -------------------->> \033[0m \n"
    else
        echo -e "\033[33m \t---------- k8s集群DNS生效失败请排查 ----------\t\n"
        exit 0
    fi 

    # 测试集群DNS pod通信
    # 绑定一下超管用户
    kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=kubernetes
    judge "绑定集群超管用户kubernetes成功" $?

    # 验证集群DNS和集群网络
    echo -e "\033[36m 请输入 nslookup kubernetes 测试dns网络集群（没报错就成功了） \033[0m" 
    kubectl run test1 -it --rm --image=busybox:1.28.3    
}


# 程序入口函数
function main(){
    # 建议先手动ssh链接一下（master1 master2 master3）防止执行脚本的时候卡住
    # 安装集群证书命令(由于是国外网站网络安装不稳定建议手动安装 master1安装就行了)
    # 下载证书安装包注释的内容手动上传后再执
    echo -e "\033[33m \t---------- shell一键部署k8s二进制 ----------\t 
    \t1. 部署过程中出现红色字体代表失败
    \t2. 部署过程中出现绿色字体代表成功 \033[0m\n"
    install_certificate
    
    
    # 创建集群根证书
    create_cluster_base_cert
    
    # 部署etcd集群（部署在三台master节点上）
    etcd_deploy
    
    # 创建etcd证书
    create_etcd_cert
    
    # 生成etcd脚本注册文件
    etcd_script
    
    # 批处理执行etcd脚本
    batch_execute_etcd_script
    
    # 2021/07/20 上面函数已成功
    # 测试etcd集群
    test_etcd
    echo -e "\033[42;37m \t<<-------------------- etcd数据库集群部署完成 -------------------->> \033[0m \n"
    
    # 创建master CA节点证书
    create_master_ca_cert
    
    # 创建kube-apiserver证书
    create_kube_apiserver_cert
    
    # 创建controller-manager的证书
    create_kube_controller_manager_cert
    
    # 创建kube-scheduler的证书
    create_kube_scheduler_cert
    
    # 创建kube-proxy的证书
    create_kube_proxy_cert
    
    # 创建集群管理员kubectl证书
    create_cluster_kubectl_cert
    
    # 颁发k8s集群证书
    issue_k8s_cert
    
    # master集群所有证书已配置完毕
    echo -e "\033[42;37m \t<<-------------------- master集群所有证书已配置完毕 -------------------->>  \033[0m \n"
    
    # 分发k8s服务组件到每个master
    issue_k8s_server
    
    # 创建k8s集群kube-controller-manager.kubeconfig配置文件
    create_controller_manage_conf
    
    # 创建kube-scheduler.kubeconfig配置文件
    create_scheduler_config
    
    # 创建kube-proxy.kubeconfig集群配置文件
    create_proxy_conf
    
    # 创建超级管理员kubectl的集群配置文件
    create_kubectl_conf
    
    # 颁发集群配置文件
    issue_k8s_cluster_conf_file
    
    # 创建集群token
    create_cluster_token
    
    # 配置apiserve配置文件
    create_apiserver_conf
    
    # 分发apiserver配置文件到m2和m3
    excute_apiserver_conf

    # 所有master注册kube-apiserver的服务
    register_apiserver
    
    # 对kube-apiserver做高可用
    kube_apiserver_keepalived
    
    # 修改keepalived配置文件
    modifi_keep

    # 配置haproxy文件
    modifi_haproxy
    
    # 部署TLS(apiserver 动态签署颁发到Node节点，实现证书签署自动化)
    deploy_tls
    
    # 部署contorller-manager
    deploy_contorller_manager
    
    # 部署kube-scheduler
    deploy_kube_scheduler
    
    # 部署kubelet服务
    deploy_kubelet
    
    # 部署kube-proxy
    deploy_kube_proxy
    
    # 查看集群节点加入请求
    add_k8s_cluster

    # 安装网络flannel插件
    deploy_flannel
    
    # 安装集群DNS
    deploy_ClusterDns
    echo -e "\033[42;37m \t<<-------------------- k8s master 集群配置完毕 -------------------->>  \033[0m \n"
    
}


# 运行主函数 
main

纯shell命令 一键安装k8s集群（三台master 也是node节点）