一键安装k8s脚本

服务器配置

节点(华为云服务器)	配置
master	2vCPUs \| 4GiB \| s6.large.2 CentOS 7.8 64bit
node1	2vCPUs \| 8GiB \| s6.large.4 CentOS 7.8 64bit
node2	2vCPUs \| 8GiB \| s6.large.4 CentOS 7.8 64bit

1.master节点安装脚本：install_k8s_master.sh。

sh文件上传到服务器后执行:

chmod +x install_k8s_master.sh

sh install_k8s_master.sh

安装过程中会有根据提示要求键盘输入。

安装docker过程中遇到卡着需要输入y，有两次

#!/bin/bash
# Kubernetes部署环境要求：
#（1）一台或多台机器，操作系统CentOS 7.x-86_x64
#（2）硬件配置：内存2GB或2G+，CPU 2核或CPU 2核+；
#（3）集群内各个机器之间能相互通信；
#（4）集群内各个机器可以访问外网，需要拉取镜像；
#（5）禁止swap分区；

# 安装步骤
#1. 安装docker
#1.1 如果没有安装docker，则安装docker。会附带安装一个docker-compose
#
#2. 安装k8s
#2.1 初始化环境
#2.2 添加安装源
#2.3 安装kubelet、kubectl、kubeadmin
#2.4 安装master
#2.5 安装网络插件

set -e

# 安装日志
install_log=/var/log/install_k8s.log
tm=$(date +'%Y%m%d %T')

# 日志颜色
COLOR_G="\x1b[0;32m"  # green
RESET="\x1b[0m"

function info(){
    echo -e "${COLOR_G}[$tm] [Info] ${1}${RESET}"
}

function run_cmd(){
  sh -c "$1 | $(tee -a "$install_log")"
}

function run_function(){
  $1 | tee -a "$install_log"
}

function install_docker(){
  info "1.使用脚本自动安装docker..."
  wget -O /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com/repository/conf/CentOS-7-reg.repo
  yum install -y yum-utils device-mapper-persistent-data lvm2
  yum-config-manager --add-repo https://sandbox-expriment-files.obs.cn-north-1.myhuaweicloud.com:443/use-framework-upgrade/docker-ce.repo
  yum install docker-ce

  info "2.启动 Docker CE..."
  sudo systemctl enable docker
  sudo systemctl start docker

  info "3.添加镜像加速器..."
  if [ ! -f "/etc/docker/daemon.json" ];then
    touch /etc/docker/daemon.json
  fi
  cat <<EOF > /etc/docker/daemon.json
{
  "registry-mirrors": [
    "https://5ajk0rns.mirror.aliyuncs.com"
    ]
}
EOF

  info "4.重新启动服务..."
  sudo systemctl daemon-reload
  sudo systemctl restart docker

  info "5.测试 Docker 是否安装正确..."
  docker run hello-world

  info "6.检测..."
  docker info

  read -p "是否安装docker-compose？默认为 no. Enter [yes/no]：" is_compose
  if [[ "$is_compose" == 'yes' ]];then
    info "7.安装docker-compose"
    sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
    sudo chmod a+x /usr/local/bin/docker-compose

    # 8.验证是否安装成功
    info "8.验证docker-compose是否安装成功..."
    docker-compose -v
  fi
}

function install_k8s() {
    info "初始化k8s部署环境..."
    init_env

    info "添加k8s安装源..."
    add_aliyun_repo

    info "安装kubelet kubeadmin kubectl..."
    install_kubelet_kubeadmin_kubectl

    info "安装kubernetes master..."
    yum -y install net-tools
    if [[ ! "$(ps aux | grep 'kubernetes' | grep -v 'grep')" ]];then
      kubeadmin_init
    else
      info "kubernetes master已经安装..."
    fi

    info "安装网络插件flannel..."
    install_flannel

    info "去污点..."
    kubectl taint nodes --all node-role.kubernetes.io/master-
}

# 初始化部署环境
function init_env() {
  info "关闭防火墙"
  systemctl stop firewalld
  systemctl disable firewalld

  info "关闭selinux"
  sed -i 's/^SELINUX=enforcing$/SELINUX=disabled/g' /etc/selinux/config
  source /etc/selinux/config

  info "关闭swap（k8s禁止虚拟内存以提高性能）"
  swapoff -a
  sed -i '/swap/s/^\(.*\)$/#\1/g' /etc/fstab

  info "设置网桥参数"
  cat <<-EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
  sysctl --system  #生效
  sysctl -w net.ipv4.ip_forward=1

  info "时间同步"
  yum install ntpdate -y
  ntpdate time.windows.com
}

# 添加aliyun安装源
function add_aliyun_repo() {
  cat > /etc/yum.repos.d/kubernetes.repo <<- EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
}

function install_kubelet_kubeadmin_kubectl() {
  yum install kubelet-1.19.4 kubeadm-1.19.4 kubectl-1.19.4 -y
  systemctl enable kubelet.service

  info "确认kubelet kubeadmin kubectl是否安装成功"
  yum list installed | grep kubelet
  yum list installed | grep kubeadm
  yum list installed | grep kubectl
  kubelet --version
}

function kubeadmin_init() {
  sleep 1
  read -p "请输入master ip地址：" ip
  kubeadm init --apiserver-advertise-address="${ip}" --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.19.4 --service-cidr=10.96.0.0/12 --pod-network-cidr=10.244.0.0/16
  mkdir -p "$HOME"/.kube
  sudo cp -i /etc/kubernetes/admin.conf "$HOME"/.kube/config
  sudo chown "$(id -u)":"$(id -g)" "$HOME"/.kube/config
}

function install_flannel() {
  yum -y install wget
  wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
  kubectl apply -f kube-flannel.yml
}

# 安装docker
read -p "是否安装docker？默认为：no. Enter [yes/no]：" is_docker
if [[ "$is_docker" == 'yes' ]];then
  run_function "install_docker"
fi

# 安装k8s
read -p "是否安装k8s？默认为：no. Enter [yes/no]：" is_k8s
if [[ "$is_k8s" == 'yes' ]];then
  run_function "install_k8s"
fi

2.node节点安装脚本：install_k8s_node.sh

#!/bin/bash
# Kubernetes部署环境要求：
#（1）一台或多台机器，操作系统CentOS 7.x-86_x64
#（2）硬件配置：内存2GB或2G+，CPU 2核或CPU 2核+；
#（3）集群内各个机器之间能相互通信；
#（4）集群内各个机器可以访问外网，需要拉取镜像；
#（5）禁止swap分区；

# 安装步骤
#1. 安装docker
#1.1 如果没有安装docker，则安装docker。会附带安装一个docker-compose
#
#2. 安装k8s
#2.1 初始化环境
#2.2 添加安装源
#2.3 安装kubelet、kubectl、kubeadmin
#2.4 安装master
#2.5 安装网络插件

set -e

# 安装日志
install_log=/var/log/install_k8s.log
tm=$(date +'%Y%m%d %T')

# 日志颜色
COLOR_G="\x1b[0;32m"  # green
RESET="\x1b[0m"

function info(){
    echo -e "${COLOR_G}[$tm] [Info] ${1}${RESET}"
}

function run_cmd(){
  sh -c "$1 | $(tee -a "$install_log")"
}

function run_function(){
  $1 | tee -a "$install_log"
}

function install_docker(){
  info "1.使用脚本自动安装docker..."
  wget -O /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com/repository/conf/CentOS-7-reg.repo
  yum install -y yum-utils device-mapper-persistent-data lvm2
  yum-config-manager --add-repo https://sandbox-expriment-files.obs.cn-north-1.myhuaweicloud.com:443/use-framework-upgrade/docker-ce.repo
  yum install docker-ce

  info "2.启动 Docker CE..."
  sudo systemctl enable docker
  sudo systemctl start docker

  info "3.添加镜像加速器..."
  if [ ! -f "/etc/docker/daemon.json" ];then
    touch /etc/docker/daemon.json
  fi
  cat <<EOF > /etc/docker/daemon.json
{
  "registry-mirrors": [
    "https://5ajk0rns.mirror.aliyuncs.com"
    ]
}
EOF

  info "4.重新启动服务..."
  sudo systemctl daemon-reload
  sudo systemctl restart docker

  info "5.测试 Docker 是否安装正确..."
  docker run hello-world

  info "6.检测..."
  docker info

  read -p "是否安装docker-compose？默认为 no. Enter [yes/no]：" is_compose
  if [[ "$is_compose" == 'yes' ]];then
    info "7.安装docker-compose"
    sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
    sudo chmod a+x /usr/local/bin/docker-compose

    # 8.验证是否安装成功
    info "8.验证docker-compose是否安装成功..."
    docker-compose -v
  fi
}

function install_k8s() {
    info "初始化k8s部署环境..."
    init_env

    info "添加k8s安装源..."
    add_aliyun_repo

    info "安装kubelet kubeadmin kubectl..."
    install_kubelet_kubeadmin_kubectl
}

# 初始化部署环境
function init_env() {
  info "关闭防火墙"
  systemctl stop firewalld
  systemctl disable firewalld

  info "关闭selinux"
  sed -i 's/^SELINUX=enforcing$/SELINUX=disabled/g' /etc/selinux/config
  source /etc/selinux/config

  info "关闭swap（k8s禁止虚拟内存以提高性能）"
  swapoff -a
  sed -i '/swap/s/^\(.*\)$/#\1/g' /etc/fstab

  info "设置网桥参数"
  cat <<-EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
  sysctl --system  #生效
  sysctl -w net.ipv4.ip_forward=1

  info "时间同步"
  yum install ntpdate -y
  ntpdate time.windows.com
}

# 添加aliyun安装源
function add_aliyun_repo() {
  cat > /etc/yum.repos.d/kubernetes.repo <<- EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
}

function install_kubelet_kubeadmin_kubectl() {
  yum install kubelet-1.19.4 kubeadm-1.19.4 kubectl-1.19.4 -y
  systemctl enable kubelet.service

  info "确认kubelet kubeadmin kubectl是否安装成功"
  yum list installed | grep kubelet
  yum list installed | grep kubeadm
  yum list installed | grep kubectl
  kubelet --version
}

function kubeadmin_init() {
  sleep 1
  read -p "请输入master ip地址：" ip
  kubeadm init --apiserver-advertise-address="${ip}" --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.19.4 --service-cidr=10.96.0.0/12 --pod-network-cidr=10.244.0.0/16
  mkdir -p "$HOME"/.kube
  sudo cp -i /etc/kubernetes/admin.conf "$HOME"/.kube/config
  sudo chown "$(id -u)":"$(id -g)" "$HOME"/.kube/config
}

function install_flannel() {
  yum -y install wget
  wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
  kubectl apply -f kube-flannel.yml
}

# 安装docker
read -p "是否安装docker？默认为：no. Enter [yes/no]：" is_docker
if [[ "$is_docker" == 'yes' ]];then
  run_function "install_docker"
fi

# 安装k8s
read -p "是否安装k8s？默认为：no. Enter [yes/no]：" is_k8s
if [[ "$is_k8s" == 'yes' ]];then
  run_function "install_k8s"
fi

3.安装完成master节点后会提示加入节点的命令类似这样

[addons] Applied essential addon: kube-proxy

Your Kubernetes control-plane has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

Then you can join any number of worker nodes by running the following on each as root:

kubeadm join 192.168.0.174:6443 --token 861suk.4xhcuycoev4rh6dm \
    --discovery-token-ca-cert-hash sha256:3fabddc90d0966bef569865236913b93fe12ee2429f957718f2485447564 


[20230508 13:48:36] [Info] 安装网络插件flannel...

在各个node节点上执行命令即可

kubeadm join 192.168.0.174:6443 --token 861suk.4xhcuycoev4rh6dm \
    --discovery-token-ca-cert-hash sha256:3fabddc90d0966bef569865236913b93fe12ee2429f957718f2485447564

4.安装完毕可以在master节点上查看状态：kubectl get nodes

安装验证

验证docker是否安装成功docker -v
验证docker-compose是否安装成功docker-compose -v
验证k8s是否安装成功kubectl get nodes
脚本中已经做了去污点[通过kubeadmin部署k8s，默认master上是不能被调度pod的，去污点就是在master上也可以被调度pod]
等待一会后，再通过kubectl get nodes查看，master状态已经正常了。

k8s安装Dashboard：https://zzzili.blog.csdn.net/article/details/130573272?spm=1001.2014.3001.5502

k8s命令教程：

Kubernetes kubectl run 命令详解 _ Kubernetes(K8S)中文文档_Kubernetes中文社区

参考：【kubernetes】史上最简单的k8s安装教程，一键安装 - 掘金

k8s安装脚本 https://www.aliyundrive.com/s/tA8xzTvq2zc 提取码: id84 点击链接保存，或者复制本段内容，打开「阿里云盘」APP ，无需下载极速在线查看，视频原画倍速播放。