Kubernetes
shell 一键安装k8s集群（三台master 也是node节点）
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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 start 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
这篇关于shell 一键安装k8s集群（三台master 也是node节点）的文章就介绍到这儿，希望我们推荐的文章对大家有所帮助，也希望大家多多支持为之网！
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