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auto-install-k8s.sh
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auto-install-k8s.sh
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#!/usr/bin/bash
#source /tmp/env
############################################################
check_moudle=( ip_vs
ip_vs_lc
ip_vs_wlc
ip_vs_rr
ip_vs_wrr
ip_vs_lblc
ip_vs_lblcr
ip_vs_dh
ip_vs_sh
ip_vs_fo
ip_vs_nq
ip_vs_sed
ip_vs_ftp
ip_vs_sh
nf_conntrack
ip_tables
ip_set xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
overlay
br_netfilter
)
URL_LIST=( http://download.lsythink.online/dl/cfssl/cfssl-certinfo_1.6.1_linux_amd64
http://download.lsythink.online/dl/cfssl/cfssl_1.6.1_linux_amd64
http://download.lsythink.online/dl/cfssl/cfssljson_1.6.1_linux_amd64
http://download.lsythink.online/dl/kubernetes_1.23.5/cri-containerd-cni-1.6.1-linux-amd64.tar.gz
http://download.lsythink.online/dl/kubernetes_1.23.5/etcd-v3.5.2-linux-amd64.tar.gz
http://download.lsythink.online/dl/kubernetes_1.23.5/kubernetes-server-linux-amd64.tar.gz
http://download.lsythink.online/dl/kubernetes_1.23.5/nginx_1.20.tar.gz
http://download.lsythink.online/dl/kubernetes_1.23.5/runc.amd64
http://download.lsythink.online/dl/scripts/check_port.sh
http://download.lsythink.online/dl/scripts/calico_other.yaml
http://download.lsythink.online/dl/scripts/rbac-dashboard.yaml
http://download.lsythink.online/dl/scripts/dashboard-k8s.yaml
http://download.lsythink.online/dl/scripts/metric-server.yaml
http://download.lsythink.online/dl/scripts/calico.yaml
http://download.lsythink.online/dl/scripts/coreDNS.yaml
)
#临时存放下载软件的目录
tmp_path='/tmp/soft'
cert_path=$tmp_path/cert
[ -e $cert_path ] || mkdir -p $cert_path
USER='root'
PASSWORD=' '
PORT=22
# 生成 EncryptionConfig 所需的加密 key
export ENCRYPTION_KEY=$(head -c 32 /dev/urandom | base64)
# 集群各机器 IP 数组
export NODE_IPS=( 192.168.30.250 192.168.30.249 192.168.30.248 )
# 集群各 IP 对应的主机名数组
export NODE_NAMES=(k8s-01 k8s-02 k8s-03 )
# 集群MASTER机器 IP 数组
export MASTER_IPS=( 192.168.30.250 192.168.30.249 192.168.30.248 )
# 集群所有的master Ip对应的主机
export MASTER_NAMES=(k8s-01 k8s-02 k8s-03)
# etcd 集群服务地址列表
export ETCD_ENDPOINTS="https://192.168.30.250:2379,https://192.168.30.249:2379,https://192.168.30.248:2379"
# etcd 集群间通信的 IP 和端口
export ETCD_NODES="k8s-01=https://192.168.30.250:2380,k8s-02=https://192.168.30.249:2380,k8s-03=https://192.168.30.248:2380"
# etcd 集群所有node ip
export ETCD_IPS=(192.168.30.250 192.168.30.249 192.168.30.248)
# etcd 数据目录
export ETCD_DATA_DIR="/data/k8s/etcd/data"
# etcd WAL 目录，建议是 SSD 磁盘分区，或者和 ETCD_DATA_DIR 不同的磁盘分区
export ETCD_WAL_DIR="/data/k8s/etcd/wal"
# kube-apiserver 的反向代理(kube-nginx)地址端口
export KUBE_APISERVER="192.168.30.54"
export KUBE_APISERVER_PORT="8443"
export KEEPALIVED_VIP='192.168.30.250'
# 节点间互联网络接口名称
export IFACE="ens33"
#节点ip
export LOCAL_IP=`ip a s "$IFACE" | grep "inet" | grep -v 'inet6' | sed -r 's#.*inet (.*)/.*#\1#'`
# k8s 各组件数据目录
export K8S_DIR="/data/k8s/k8s"
#k8s各组件配置文件目录
export K8S_CONF_DIR="/etc/kubernetes"
# docker 数据目录
#export DOCKER_DIR="/data/k8s/docker"
## 以下参数一般不需要修改
# TLS Bootstrapping 使用的 Token，可以使用命令 head -c 16 /dev/urandom | od -An -t x | tr -d ' ' 生成
#BOOTSTRAP_TOKEN="41f7e4ba8b7be874fcff18bf5cf41a7c"
# 最好使用 当前未用的网段 来定义服务网段和 Pod 网段
# 服务网段，部署前路由不可达，部署后集群内路由可达(kube-proxy 保证)
SERVICE_CIDR="10.254.0.0/16"
# Pod 网段，建议 /16 段地址，部署前路由不可达，部署后集群内路由可达(flanneld 保证)
CLUSTER_CIDR="172.30.0.0/16"
# 服务端口范围 (NodePort Range)
export NODE_PORT_RANGE="1024-32767"
# flanneld 网络配置前缀
export FLANNEL_ETCD_PREFIX="/kubernetes/network"
# kubernetes 服务 IP (一般是 SERVICE_CIDR 中第一个IP)
export CLUSTER_KUBERNETES_SVC_IP="10.254.0.1"
# 集群 DNS 服务 IP (从 SERVICE_CIDR 中预分配)
export CLUSTER_DNS_SVC_IP="10.254.0.2"
# 集群 DNS 域名（末尾不带点号）
export CLUSTER_DNS_DOMAIN="cluster.local"
# 将二进制目录 /opt/k8s/bin 加到 PATH 中
export PATH=/opt/k8s/bin:$PATH
############################################################
init_os(){
which jq &>/dev/null
[ $? -eq 0 ] || yum install -y jq
error_file='/tmp/check_os_result.txt'
#判断内核是否满足
kernel_version=`uname -r | awk -F '.' '{print $1}'`
if [ $kernel_version -eq 3 ];then
echo "`uname -r` 内核版本过低" >> ${error_file}
fi
#检查模块是否加载
for moudle in ${check_moudle[@]};do
lsmod | awk '{print $1}' | grep -w $moudle &>/dev/null
if [ $? -ne 0 ];then
#尝试再次加载模块
modprobe ${moudle} &>/dev/null
#判断是否成功
if [ $? -ne 0 ];then
echo "缺少 ${moudle}" >> ${error_file}
break
fi
fi
done
#判断是否成功
[ -e ${error_file} ] && exit
#初始化系统
# ls /etc/yum.repos.d/ | grep -e epel -e CentOS-Base &>/dev/null
# if [ $? -ne 0 ];then
# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo &> /dev/null
# curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo &> /dev/null
# fi
which expect &> /dev/null
[ $? -eq 0 ] || yum install -y sshpass expect &> /dev/null
#判断是否安装成功
which expect &> /dev/null
if [ $? -eq 0 ];then
#分发公钥
[ -e /root/.ssh/id_rsa ] || ssh-keygen -t rsa -P "" -f /root/.ssh/id_rsa
for i in ${NODE_IPS[@]};do
expect -c "
spawn ssh-copy-id -i /root/.ssh/id_rsa.pub root@$i
expect {
\"*yes/no*\" {send \"yes\r\"; exp_continue}
\"*password*\" {send \"${PASSWORD}\r\"; exp_continue}
\"*Password*\" {send \"${PASSWORD}\r\";}
} "
done
else
echo "expect 安装失败"
exit 1
fi
}
#设置hosts主机名,分发主机名
init_hosts(){
>/tmp/tmp_hosts
for num in $(seq 0 `awk "BEGIN{print("${#NODE_IPS[@]}"-1)}"`);do
name=${NODE_NAMES[$num]}
#生成hosts文件
echo ${NODE_IPS[${num}]} $name >>/tmp/tmp_hosts
#设置主机名
ssh $USER@${NODE_IPS[${num}]} -p $PORT "hostnamectl set-hostname ${name}"
done
for ip in ${NODE_IPS[@]};do
scp -r -P $PORT /tmp/tmp_hosts $USER@$ip:/tmp
ssh $USER@$ip -p $PORT "cat /tmp/tmp_hosts >> /etc/hosts"
done
}
download_soft(){
[ -e $tmp_path ] || mkdir -p $tmp_path
#下载所有文件
for url in ${URL_LIST[@]};do
wget $url -O $tmp_path/`basename $url`
[ $? -ne 0 ] && echo " $url 下载失败" && exit
echo "$url 下载成功"
done
}
install_cfssl(){
cd $tmp_path &&\
#安装工具
which cfssl &> /dev/null
if [ $? -ne 0 ];then
mv cfssl_1.6.1_linux_amd64 cfssl &&\
mv cfssljson_1.6.1_linux_amd64 cfssljson &&\
mv cfssl-certinfo_1.6.1_linux_amd64 cfssl-certinfo &&\
mv cfssl* /usr/local/bin/
chmod a+x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo
fi
which cfssl &> /dev/null
[ $? -ne 0 ] && (echo "安装cfssl失败" && exit)
}
#########################################证书相关###################################3
#创建CA根证书
init_ca_cert(){
[ -e $K8S_CONF_DIR/cert ] || mkdir -p $K8S_CONF_DIR/cert
#创建证书存放目录
cert_path=$tmp_path/cert
[ -e $cert_path ] || mkdir -p $cert_path
cat > $cert_path/ca-csr.json <<-EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "k8s",
"OU": "System"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
#生成证书模板
cat >$cert_path/ca-config.json <<-EOF
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
#生成根证书
cd $cert_path &&\
cfssl gencert -initca ca-csr.json | cfssljson -bare ca
#cp ca* $K7S_CONF_DIR/cert
#签发所有的证书，由该节点进行分发
#生成etcd证书
[ -e $cert_path/etcd_cert ] || mkdir -p $cert_path/etcd_cert
#获取etcd所有节点ip
tmp_ips=''
for i in $(seq 0 `awk "BEGIN{print("${#ETCD_IPS[@]}"-1)}"`);do
if [ ${ETCD_IPS[$i]} == ${ETCD_IPS[-1]} ];then
tmp_ips+=\"${ETCD_IPS[$i]}\"
else
tmp_ips+=\"${ETCD_IPS[$i]}\",
fi
done
#签发证书
cat > $cert_path/etcd-csr.json<<-EOF
{
"CN": "etcd",
"hosts": [
"127.0.0.1",
${tmp_ips}
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
#生成CA证书
cd $cert_path &&\
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes etcd-csr.json | cfssljson -bare etcd
# cp -r etcd* $K8S_CONF_DIR/etcd/cert
mv etcd* $cert_path/etcd_cert
#########################################################
#生成apiserver证书
#获取apiserver所有节点ip
tmp_ips=''
for i in $(seq 0 `awk "BEGIN{print("${#MASTER_IPS[@]}"-1)}"`);do
if [ ${MASTER_IPS[$i]} == ${MASTER_IPS[-1]} ];then
tmp_ips+=\"${MASTER_IPS[$i]}\"
else
tmp_ips+=\"${MASTER_IPS[$i]}\",
fi
done
[ -e $cert_path/kubernetes_cert ] || mkdir -p $cert_path/kubernetes_cert
cat > $cert_path/kube-apiserver-csr.json <<-EOF
{
"CN": "kubernetes",
"hosts": [
"127.0.0.1",
"${KUBE_APISERVER}",
"${CLUSTER_KUBERNETES_SVC_IP}",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local",
${tmp_ips}
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
cd $cert_path &&\
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-apiserver-csr.json | cfssljson -bare kube-apiserver
#token文件
#####################
echo "`head -c 16 /dev/urandom | od -An -t x | tr -d ' '`,kubelet-bootstrap,10001,\"system:kubelet-bootstrap\"" > token.csv
mv kube-apiserver* token.csv $cert_path/kubernetes_cert
################################################
#生成kubectl的证书
[ -e $cert_path/kubectl_cert ] || mkdir -p $cert_path/kubectl_cert
cat >$cert_path/admin-csr.json<<-EOF
{
"CN": "admin",
"hosts": [
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
#签发证书
cd $cert_path &&\
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
mv admin* $cert_path/kubectl_cert
#########################################
#**kube-controller-manager**证书
[ -e $cert_path/kube-controller-manager_cert ] || mkdir -p $cert_path/kube-controller-manager_cert
cat > $cert_path/kube-controller-manager-csr.json <<-EOF
{
"CN": "system:kube-controller-manager",
"hosts": [
"127.0.0.1",
${tmp_ips}
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "system:kube-controller-manager",
"OU": "System"
}
]
}
EOF
#签发证书
cd $cert_path &&\
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
mv kube-controller-manager* $cert_path/kube-controller-manager_cert
########################################
#签发kube-scheduler
[ -e $cert_path/kube-scheduler_cert ] || mkdir -p $cert_path/kube-scheduler_cert
cat > $cert_path/kube-scheduler-csr.json <<-EOF
{
"CN": "system:kube-scheduler",
"hosts": [
"127.0.0.1",
${tmp_ips}
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "system:kube-scheduler",
"OU": "System"
}
]
}
EOF
#生成证书
cd ${cert_path} &&\
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-scheduler-csr.json | cfssljson -bare kube-scheduler
mv kube-scheduler* $cert_path/kube-scheduler_cert
#签发kube-proxy的证书文件
[ -e $cert_path/kube-proxy_cert ] || mkdir -p $cert_path/kube-proxy_cert
#获取所有节点ip
tmp_ips=''
for i in $(seq 0 `awk "BEGIN{print("${#NODE_IPS[@]}"-1)}"`);do
if [ ${NODE_IPS[$i]} == ${NODE_IPS[-1]} ];then
tmp_ips+=\"${NODE_IPS[$i]}\"
else
tmp_ips+=\"${NODE_IPS[$i]}\",
fi
done
cat > $cert_path/kube-proxy-csr.json <<-EOF
{
"CN": "system:kube-proxy",
"hosts": [
"127.0.0.1",
${tmp_ips}
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "system:kube-proxy",
"OU": "System"
}
]
}
EOF
#生成证书文件
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
mv kube-proxy* $cert_path/kube-proxy_cert
#签发kubelet证书文件
[ -e $cert_path/kubelet_cert ] || mkdir -p $cert_path/kubelet_cert
cat > $cert_path/kubelet-csr.json <<-EOF
{
"CN": "system:kubelet",
"hosts": [
"127.0.0.1",
${tmp_ips}
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "system:kubelet",
"OU": "System"
}
]
}
EOF
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kubelet-csr.json | cfssljson -bare kubelet
mv kubelet* $cert_path/kubelet_cert
}
##########################################################
#部署etcd节点
install_etcd(){
for ip in ${ETCD_IPS[@]};do
#判断是否存在相关目录
ssh $ip "[ -e $K8S_DIR/etcd ] || mkdir -p $K8S_DIR/etcd"
ssh $ip "[ -e $K8S_CONF_DIR/cert ] || mkdir -p $K8S_CONF_DIR/cert"
ssh $ip "[ -e $K8S_CONF_DIR/etcd/cert ] || mkdir -p $K8S_CONF_DIR/etcd/cert"
ssh $ip "[ -e ${ETCD_DATA_DIR} ] || mkdir -p ${ETCD_DATA_DIR}"
ssh $ip "[ -e /usr/local/etcd ] && rm -rf /usr/local/etcd"
#分发文件
cd $tmp_path &&\
scp -r etcd-v3.5.2-linux-amd64.tar.gz $ip:/tmp
if [ $? -eq 0 ];then
ssh $ip "cd /tmp && tar -xf etcd-v3.5.2-linux-amd64.tar.gz"
ssh $ip "cp -r /tmp/etcd-v3.5.2-linux-amd64 /usr/local/etcd"
ssh $ip "echo 'PATH=/usr/local/etcd:$PATH' >>/etc/profile && source /etc/profile"
fi
#获取当前节点hostname
name=`cat /etc/hosts| grep ${ip} | awk 'NR==1{print $2}'`
#分发配置文件以及启动文件到各个etcd节点
ssh $ip "cat > $K8S_CONF_DIR/etcd/etcd.yaml <<EOF
name: ${name}
data-dir: ${ETCD_DATA_DIR}
listen-peer-urls: https://${ip}:2380
listen-client-urls: https://${ip}:2379,https://127.0.0.1:2379
advertise-client-urls: https://${ip}:2379,https://127.0.0.1:2379
initial-advertise-peer-urls: https://${ip}:2380
initial-cluster: ${ETCD_NODES}
initial-cluster-token: etcd-cluster-token
initial-cluster-state: new
client-transport-security:
cert-file: $K8S_CONF_DIR/etcd/cert/etcd.pem
key-file: $K8S_CONF_DIR/etcd/cert/etcd-key.pem
client-cert-auth: true
trusted-ca-file: $K8S_CONF_DIR/cert/ca.pem
peer-transport-security:
cert-file: $K8S_CONF_DIR/etcd/cert/etcd.pem
key-file: $K8S_CONF_DIR/etcd/cert/etcd-key.pem
client-cert-auth: true
trusted-ca-file: $K8S_CONF_DIR/cert/ca.pem
EOF
"
#配置systemd文件
ssh $ip "cat > /usr/lib/systemd/system/etcd.service <<EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
WorkingDirectory=${ETCD_DATA_DIR}
ExecStart=/usr/local/etcd/etcd --config-file=$K8S_CONF_DIR/etcd/etcd.yaml
Restart=on-failure
RestartSec=5
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
"
#分发证书文件
scp -r $cert_path/etcd_cert/* $ip:$K8S_CONF_DIR/etcd/cert
scp -r $cert_path/ca* $ip:$K8S_CONF_DIR/cert/
done
#启动etcd集群
for ip in ${ETCD_IPS[@]};do
{
ssh $ip "systemctl daemon-reload && systemctl enable etcd && systemctl start etcd"
} &
#判断服务是否成功
#ssh $ip "result=`systemctl is-active etcd`&& [ $result == 'active' ]"
done
wait
}
#部署kubernetes
install_apiserver(){
cd $tmp_path &&\
[ -e kubernetes-server-linux-amd64.tar.gz ] || (echo "apiserver 下载失败，请重新下载" && exit)
tar -xf kubernetes-server-linux-amd64.tar.gz
#配置nginx
cd $tmp_path &&\
[ -e nginx_1.20.tar.gz ] || (echo "nginx is not exist" && exit)
tar -xf nginx_1.20.tar.gz
#构造nginx配置文件
cat nginx_1.20/conf/nginx.conf<<EOF
worker_processes 1;
events {
worker_connections 1024;
}
stream {
upstream backend {
hash consistent;
###
}
server {
listen *:${KUBE_APISERVER_PORT};
proxy_connect_timeout 1s;
proxy_pass backend;
}
}
EOF
for ip in ${MASTER_IPS[@]};do
sed -ri "/###/a\\\tserver ${ip}:6443 max_fails=3 fail_timeout=30s;" nginx_1.20/conf/nginx.conf
done
for ip in ${MASTER_IPS[@]};do
#判断是否存在相关目录
ssh $ip "[ -e $K8S_DIR ] || mkdir -p $K8S_DIR"
ssh $ip "[ -e $K8S_CONF_DIR/cert ] || mkdir -p $K8S_CONF_DIR/cert"
ssh $ip "[ -e /usr/local/kubernetes ] || mkdir -p /usr/local/kubernetes"
ssh $ip "[ -e /var/log/kubernetes ] || mkdir -p /var/log/kubernetes"
#分发软件
cd $tmp_path &&\
scp -r kubernetes/server/bin/kube-apiserver $ip:/usr/local/kubernetes/kube-apiserver
scp -r kubernetes/server/bin/kubectl $ip:/usr/local/kubernetes/kubectl
#scp -r kubernetes/server/bin/kubelet $ip:/usr/local/kubernetes/kubelet
#scp -r kubernetes/server/bin/kube-scheduler $ip:/usr/local/kubernetes/kube-scheduler
#scp -r kubernetes/server/bin/kube-proxy $ip:/usr/local/kubernetes/kube-proxy
#scp -r kubernetes/server/bin/kube-controller-manager $ip:/usr/local/kubernetes/kube-controller-manager
ssh $ip "echo 'PATH=/usr/local/kubernetes/:\$PATH' >>/etc/profile"
ssh $ip "source /etc/profile"
#分发证书和token
scp -r $cert_path/kubernetes_cert/* $ip:$K8S_CONF_DIR/cert
scp -r $cert_path/ca* $ip:$K8S_CONF_DIR/cert/
#生成配置文件
ssh $ip "cat > /usr/lib/systemd/system/kube-apiserver.service <<EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=etcd.service
Wants=etcd.service
[Service]
ExecStart=/usr/local/kubernetes/kube-apiserver \\
--enable-admission-plugins=NamespaceLifecycle,NodeRestriction,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota \\
--anonymous-auth=false \\
--bind-address=${ip} \\
--secure-port=6443 \\
--advertise-address=${ip} \\
--insecure-port=0 \\
--authorization-mode=Node,RBAC \\
--runtime-config=api/all=true \\
--enable-bootstrap-token-auth \\
--service-cluster-ip-range=${SERVICE_CIDR} \\
--token-auth-file=$K8S_CONF_DIR/cert/token.csv \\
--service-node-port-range=30000-50000 \\
--tls-cert-file=$K8S_CONF_DIR/cert/kube-apiserver.pem \\
--tls-private-key-file=$K8S_CONF_DIR/cert/kube-apiserver-key.pem \\
--client-ca-file=$K8S_CONF_DIR/cert/ca.pem \\
--kubelet-client-certificate=$K8S_CONF_DIR/cert/kube-apiserver.pem \\
--kubelet-client-key=$K8S_CONF_DIR/cert/kube-apiserver-key.pem \\
--service-account-key-file=$K8S_CONF_DIR/cert/ca-key.pem \\
--service-account-signing-key-file=$K8S_CONF_DIR/cert/ca-key.pem \\
--service-account-issuer=api \\
--etcd-cafile=$K8S_CONF_DIR/cert/ca.pem \\
--etcd-certfile=$K8S_CONF_DIR/etcd/cert/etcd.pem \\
--etcd-keyfile=$K8S_CONF_DIR/etcd/cert/etcd-key.pem \\
--etcd-servers=${ETCD_ENDPOINTS} \\
--enable-swagger-ui=true \\
--allow-privileged=true \\
--apiserver-count=3 \\
--audit-log-maxage=30 \\
--audit-log-maxbackup=3 \\
--audit-log-maxsize=100 \\
--audit-log-path=/var/log/kube-apiserver-audit.log \\
--event-ttl=1h \\
--alsologtostderr=true \\
--logtostderr=false \\
--log-dir=/var/log/kubernetes \\
--requestheader-client-ca-file=$K8S_CONF_DIR/cert/ca.pem \\
--requestheader-allowed-names=front-proxy-client \\
--requestheader-extra-headers-prefix='X-Remote-Extra-'\\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-username-headers=X-Remote-User\\
--proxy-client-cert-file=$K8S_CONF_DIR/cert/ca.pem \\
--proxy-client-key-file=$K8S_CONF_DIR/cert/ca-key.pem
--v=4
Restart=on-failure
RestartSec=5
Type=notify
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
"
#启动服务
ssh $ip "systemctl daemon-reload && systemctl enable kube-apiserver.service && systemctl start kube-apiserver.service"
if [ ${#MASTER_IPS[@]} -gt 1 ];then
#分发nginx配置
cd $tmp_path &&\
scp -r nginx_1.20 $ip:/usr/local/nginx_1.20
#分发nginx启动配置文件
ssh $ip "cat > /usr/lib/systemd/system/kube-nginx.service <<EOF
[Unit]
Description=kube-apiserver nginx proxy
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=forking
ExecStartPre=/usr/local/nginx_1.20/sbin/nginx -c /usr/local/nginx_1.20/conf/nginx.conf -p /usr/local/nginx_1.20 -t
ExecStart=/usr/local/nginx_1.20/sbin/nginx -c /usr/local/nginx_1.20/conf/nginx.conf -p /usr/local/nginx_1.20
ExecReload=/usr/local/nginx_1.20/sbin/nginx -c /usr/local/nginx_1.20/conf/nginx.conf -p /usr/local/nginx_1.20 -s reload
PrivateTmp=true
Restart=always
RestartSec=5
StartLimitInterval=0
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
"
#启动nginx
ssh $ip "systemctl daemon-reload && systemctl enable kube-nginx && systemctl start kube-nginx "
#安装keepalived
#which keepalived &> /dev/null
#[ $? -eq 0 ] || yum install -y keepalived
ssh $ip "yum install -y keepalived"
#判断是否是指定的vip节点
if [ "$KEEPALIVED_VIP" == "$ip" ];then
ret='MASTER'
else
ret='BACKUP'
fi
#分发keepalived 配置文件
ssh $ip "cat > /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
global_defs {
router_id ${ip}
}
vrrp_script chk_nginx {
script '/etc/keepalived/check_port.sh ${KUBE_APISERVER_PORT}'
interval 2
weight -20
}
vrrp_instance VI_1 {
state ${ret}
interface ${IFACE}
virtual_router_id 251
priority 100
advert_int 1
mcast_src_ip ${ip}
nopreempt
authentication {
auth_type PASS
auth_pass 11111111
}
track_script {
chk_nginx
}
virtual_ipaddress {
${KUBE_APISERVER}
}
}
EOF
"
#分发检测脚本
scp -r $tmp_path/check_port.sh $ip:/etc/keepalived/check_port.sh
#脚本赋权
ssh $ip "chmod a+x /etc/keepalived/check_port.sh"
#启动nginx以及keeplived
ssh $ip "systemctl daemon-reload && systemctl enable keepalived && systemctl start keepalived "
fi
done
}
#部署kubectl
install_kubectl(){
cd $tmp_path &&\
[ -d /usr/local/kubernetes/ ] || mkdir -p /usr/local/kubernetes/
cp -r kubernetes/server/bin/kubectl /usr/local/kubernetes/kubectl
[ -e ~/.kube ] || mkdir -p ~/.kube
echo 'export PATH=$PATH:/usr/local/kubernetes/' >> /etc/profile
source /etc/profile
cd $cert_path/kubectl_cert/ &&\
kubectl config set-cluster kubernetes --certificate-authority=$cert_path/ca.pem --embed-certs=true --server=https://${KUBE_APISERVER}:${KUBE_APISERVER_PORT} --kubeconfig=kube.config
kubectl config set-credentials admin --client-certificate=admin.pem --client-key=admin-key.pem --embed-certs=true --kubeconfig=kube.config
kubectl config set-context kubernetes --cluster=kubernetes --user=admin --kubeconfig=kube.config
kubectl config use-context kubernetes --kubeconfig=kube.config
cp -r kube.config ~/.kube/config
kubectl create clusterrolebinding kube-apiserver:kubelet-apis --clusterrole=system:kubelet-api-admin --user kubernetes
for ip in ${MASTER_IPS[@]};do
#master节点部署kubectl
ssh $ip "[ -d /usr/local/kubernetes/ ] || mkdir -p /usr/local/kubernetes/"
cd $tmp_path &&\
scp -r kubernetes/server/bin/kubectl $ip:/usr/local/kubernetes/kubectl
#分发证书到master节点，方便签发证书
ssh $ip "[ -e $K8S_CONF_DIR/kubectl/kubectl_cert ] || mkdir -p $K8S_CONF_DIR/kubectl/kubectl_cert"
scp -r $cert_path/kubectl_cert/* $ip:$K8S_CONF_DIR/kubectl/kubectl_cert/
ssh $ip "[ -e ~/.kube ] || mkdir -p ~/.kube"
scp -r $cert_path/kubectl_cert/kube.config $ip:~/.kube/config
ssh $ip "echo 'export PATH=\$PATH:/usr/local/kubernetes/' >> /etc/profile"
ssh $ip "source /etc/profile"
#ssh $ip " echo 'source <(kubectl completion bash)' >>~/.bashrc"
done
}
#部署**kube-controller-manager**
install_kube-controller-manager(){
#创建配置文件
cd $cert_path/kube-controller-manager_cert/ &&\
kubectl config set-cluster kubernetes --certificate-authority=$cert_path/ca.pem --embed-certs=true --server=https://${KUBE_APISERVER}:${KUBE_APISERVER_PORT} --kubeconfig=kube-controller-manager.kubeconfig
#设置客户端认证参数
kubectl config set-credentials system:kube-controller-manager --client-certificate=kube-controller-manager.pem --client-key=kube-controller-manager-key.pem --embed-certs=true --kubeconfig=kube-controller-manager.kubeconfig
#设置上下文
kubectl config set-context system:kube-controller-manager --cluster=kubernetes --user=system:kube-controller-manager --kubeconfig=kube-controller-manager.kubeconfig
#切换上下文
kubectl config use-context system:kube-controller-manager --kubeconfig=kube-controller-manager.kubeconfig
for ip in ${MASTER_IPS[@]};do
ssh $ip "[ -d /usr/local/kubernetes/ ] || mkdir -p /usr/local/kubernetes/"
cd $tmp_path &&\
scp -r kubernetes/server/bin/kube-controller-manager $ip:/usr/local/kubernetes/kube-controller-manager
#分发配置文件
cd $cert_path/kube-controller-manager_cert/ &&\
ssh $ip "[ -e $K8S_CONF_DIR/kube-controller-manager ] || mkdir -p $K8S_CONF_DIR/kube-controller-manager"
ssh $ip "[ -e $K8S_CONF_DIR/kube-controller-manager/cert ] || mkdir -p $K8S_CONF_DIR/kube-controller-manager/cert"
scp -r kube-controller-manager.kubeconfig $ip:$K8S_CONF_DIR/kube-controller-manager/kube-controller-manager.kubeconfig
scp -r kube-controller-manager* $ip:$K8S_CONF_DIR/kube-controller-manager/cert/
#分发启动文件
ssh $ip "cat > /usr/lib/systemd/system/kube-controller-manager.service <<-EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
ExecStart=/usr/local/kubernetes/kube-controller-manager \\
--secure-port=10257 \\
--bind-address=127.0.0.1 \\
--kubeconfig=${K8S_CONF_DIR}/kube-controller-manager/kube-controller-manager.kubeconfig \\
--service-cluster-ip-range=${SERVICE_CIDR}\\
--cluster-name=kubernetes\\
--cluster-signing-cert-file=${K8S_CONF_DIR}/cert/ca.pem\\
--cluster-signing-key-file=${K8S_CONF_DIR}/cert/ca-key.pem\\
--allocate-node-cidrs=true\\
--cluster-cidr=${CLUSTER_CIDR} --experimental-cluster-signing-duration=87600h\\
--root-ca-file=${K8S_CONF_DIR}/cert/ca.pem \\
--service-account-private-key-file=${K8S_CONF_DIR}/cert/ca-key.pem \\
--leader-elect=true \\