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install-k8s.sh
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#!/bin/bash
#********************************************************************
#Date: 2023-11-14
#FileName: install_kubernetes.sh
#Description: install kubernetes shell script
#Copyright (C): 2023 All rights reserved
#********************************************************************
KUBE_VERSION="1.23.16"
#KUBE_VERSION="1.24.4"
#KUBE_VERSION="1.24.3"
#KUBE_VERSION="1.24.0"
#KUBE_VERSION="1.22.1"
#KUBE_VERSION="1.17.2"
KUBE_VERSION2=$(echo $KUBE_VERSION |awk -F. '{print $2}')
KUBEAPI_IP=10.196.10.118
MASTER1_IP=10.196.10.118
NODE1_IP=10.196.10.119
NODE2_IP=10.196.10.120
GNODE1_IP=10.196.10.125
GNODE2_IP=10.196.10.126
GNODE3_IP=10.196.10.127
GNODE4_IP=10.196.10.128
GNODE5_IP=10.196.10.129
GNODE6_IP=10.196.10.130
GNODE7_IP=10.196.10.131
GNODE8_IP=10.196.10.132
GNODE9_IP=10.196.10.133
GNODE10_IP=10.196.10.134
HARBOR_IP=10.196.10.120
DOMAIN=xffuture.com
MASTER1=master10118.$DOMAIN
NODE1=node10119.$DOMAIN
NODE2=node10120.$DOMAIN
GNODE1=gnode10125.$DOMAIN
GNODE2=gnode10126.$DOMAIN
GNODE3=gnode10127.$DOMAIN
GNODE4=gnode10128.$DOMAIN
GNODE5=gnode10129.$DOMAIN
GNODE6=gnode10130.$DOMAIN
GNODE7=gnode10131.$DOMAIN
GNODE8=gnode10132.$DOMAIN
GNODE9=gnode10133.$DOMAIN
GNODE10=gnode10134.$DOMAIN
HARBOR=harbor.$DOMAIN
POD_NETWORK="10.244.0.0/16"
SERVICE_NETWORK="10.96.0.0/12"
IMAGES_URL="registry.aliyuncs.com/google_containers"
CIR_DOCKER_VERSION=0.2.5
CIR_DOCKER_URL="https://github.com/Mirantis/cri-dockerd/releases/download/v${CIR_DOCKER_VERSION}/cri-dockerd_${CIR_DOCKER_VERSION}.3-0.ubuntu-${UBUNTU_CODENAME}_amd64.deb"
LOCAL_IP=`hostname -I|awk '{print $1}'`
. /etc/os-release
COLOR_SUCCESS="echo -e \\033[1;32m"
COLOR_FAILURE="echo -e \\033[1;31m"
END="\033[m"
color () {
RES_COL=60
MOVE_TO_COL="echo -en \\033[${RES_COL}G"
SETCOLOR_SUCCESS="echo -en \\033[1;32m"
SETCOLOR_FAILURE="echo -en \\033[1;31m"
SETCOLOR_WARNING="echo -en \\033[1;33m"
SETCOLOR_NORMAL="echo -en \E[0m"
echo -n "$1" && $MOVE_TO_COL
echo -n "["
if [ $2 = "success" -o $2 = "0" ] ;then
${SETCOLOR_SUCCESS}
echo -n $" OK "
elif [ $2 = "failure" -o $2 = "1" ] ;then
${SETCOLOR_FAILURE}
echo -n $"FAILED"
else
${SETCOLOR_WARNING}
echo -n $"WARNING"
fi
${SETCOLOR_NORMAL}
echo -n "]"
echo
}
check () {
if [ $ID = 'ubuntu' -a ${VERSION_ID} = "20.04" ];then
true
else
color "不支持此操作系统，退出!" 1
exit
fi
}
install_prepare () {
cat >> /etc/hosts <<EOF
$KUBEAPI_IP kubeapi.$DOMAIN
$MASTER1_IP $MASTER1
$NODE1_IP $NODE1
$NODE2_IP $NODE2
$GNODE1_IP $GNODE1
$GNODE2_IP $GNODE2
$GNODE3_IP $GNODE3
$GNODE4_IP $GNODE4
$GNODE5_IP $GNODE5
$GNODE6_IP $GNODE6
$GNODE7_IP $GNODE7
$GNODE8_IP $GNODE8
$GNODE9_IP $GNODE9
$GNODE10_IP $GNODE10
$HARBOR_IP $HARBOR
EOF
hostnamectl set-hostname $(awk -v ip=$LOCAL_IP '{if($1==ip && $2 !~ "kubeapi")print $2}' /etc/hosts)
swapoff -a
sed -i '/swap/s/^/#/' /etc/fstab
color "安装前准备完成!" 0
sleep 1
}
install_docker () {
apt update
apt -y install docker-ce=5:20.10.24~3-0~ubuntu-focal docker-ce-cli=5:20.10.24~3-0~ubuntu-focal || { color "安装Docker失败!" 1; exit 1; }
cat > /etc/docker/daemon.json <<EOF
{
"registry-mirrors": [
"https://docker.mirrors.ustc.edu.cn",
"https://hub-mirror.c.163.com",
"https://reg-mirror.qiniu.com",
"https://registry.docker-cn.com"
],
"exec-opts": ["native.cgroupdriver=systemd"]
}
EOF
systemctl restart docker.service
docker info && { color "安装Docker成功!" 0; sleep 1; } || { color "安装Docker失败!" 1 ; exit 2; }
}
install_kubeadm () {
apt-get update && apt-get install -y apt-transport-https
curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
EOF
apt-get update
apt-cache madison kubeadm |head
${COLOR_FAILURE}"5秒后即将安装: kubeadm-"${KUBE_VERSION}" 版本....."${END}
${COLOR_FAILURE}"如果想安装其它版本，请按ctrl+c键退出，修改版本再执行"${END}
sleep 6
#安装指定版本
apt install -y kubeadm=${KUBE_VERSION}-00 kubelet=${KUBE_VERSION}-00 kubectl=${KUBE_VERSION}-00
[ $? -eq 0 ] && { color "安装kubeadm成功!" 0;sleep 1; } || { color "安装kubeadm失败!" 1 ; exit 2; }
#实现kubectl命令自动补全功能
kubectl completion bash > /etc/profile.d/kubectl_completion.sh
}
#Kubernetes-v1.24之前版本无需安装cri-dockerd
install_cri_dockerd () {
[ $KUBE_VERSION2 -lt 24 ] && return
if [ ! -e cri-dockerd_${CIR_DOCKER_VERSION}.3-0.ubuntu-${UBUNTU_CODENAME}_amd64.deb ];then
curl -LO $CIR_DOCKER_URL || { color "下载cri-dockerd失败!" 1 ; exit 2; }
fi
dpkg -i cri-dockerd_${CIR_DOCKER_VERSION}.3-0.ubuntu-${UBUNTU_CODENAME}_amd64.deb
[ $? -eq 0 ] && color "安装cri-dockerd成功!" 0 || { color "安装cri-dockerd失败!" 1 ; exit 2; }
sed -i '/^ExecStart/s#$# --pod-infra-container-image registry.aliyuncs.com/google_containers/pause:3.7#' /lib/systemd/system/cri-docker.service
systemctl daemon-reload
systemctl restart cri-docker.service
[ $? -eq 0 ] && { color "配置cri-dockerd成功!" 0 ; sleep 1; } || { color "配置cri-dockerd失败!" 1 ; exit 2; }
}
#只有Kubernetes集群的第一个master节点需要执行下面初始化函数
kubernetes_init () {
if [ $KUBE_VERSION2 -lt 24 ] ;then
kubeadm init --control-plane-endpoint="kubeapi.$DOMAIN" \
--kubernetes-version=v${KUBE_VERSION} \
--pod-network-cidr=${POD_NETWORK} \
--service-cidr=${SERVICE_NETWORK} \
--token-ttl=0 \
--upload-certs \
--image-repository=${IMAGES_URL}
else
#Kubernetes-v1.24版本前无需加选项 --cri-socket=unix:///run/cri-dockerd.sock
kubeadm init --control-plane-endpoint="kubeapi.$DOMAIN" \
--kubernetes-version=v${KUBE_VERSION} \
--pod-network-cidr=${POD_NETWORK} \
--service-cidr=${SERVICE_NETWORK} \
--token-ttl=0 \
--upload-certs \
--image-repository=${IMAGES_URL} \
--cri-socket=unix:///run/cri-dockerd.sock
fi
[ $? -eq 0 ] && color "Kubernetes集群初始化成功!" 0 || { color "Kubernetes集群初始化失败!" 1 ; exit 3; }
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config
}
reset_kubernetes() {
kubeadm reset -f --cri-socket unix:///run/cri-dockerd.sock
rm -rf /etc/cni/net.d/ $HOME/.kube/config
}
check
PS3="请选择编号(1-4): "
ACTIONS="
初始化新的Kubernetes集群
加入已有的Kubernetes集群
退出Kubernetes集群
退出本程序
"
select action in $ACTIONS;do
case $REPLY in
1)
install_prepare
install_docker
install_kubeadm
install_cri_dockerd
kubernetes_init
break
;;
2)
install_prepare
install_docker
install_kubeadm
install_cri_dockerd
$COLOR_SUCCESS"加入已有的Kubernetes集群已准备完毕,还需要执行最后一步加入集群的命令 kubeadm join !"${END}
break
;;
3)
reset_kubernetes
break
;;
4)
exit
;;
esac
done