一键安装k8s脚本

一时失言乱红尘 2023-09-27 20:18 35阅读 0赞

服务器配置

<table style="width:500px;"> 
 <tbody> 
  <tr> 
   <td>节点(华为云服务器)</td> 
   <td>配置</td> 
  </tr> 
  <tr> 
   <td>master</td> 
   <td> <p>2vCPUs | 4GiB | s6.large.2</p> <p>CentOS 7.8 64bit</p> </td> 
  </tr> 
  <tr> 
   <td>node1</td> 
   <td> <p>2vCPUs | 8GiB | s6.large.4</p> <p>CentOS 7.8 64bit</p> </td> 
  </tr> 
  <tr> 
   <td>node2</td> 
   <td> <p>2vCPUs | 8GiB | s6.large.4</p> <p>CentOS 7.8 64bit</p> </td> 
  </tr> 
 </tbody> 
</table>

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

![785eff697f3e4bd2a1a0877963e62b72.png][]

#!/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

![1c4a32b602a54bd2baa76bc25909529c.png][]

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][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][Kubernetes kubectl run _ _ Kubernetes_K8S_Kubernetes]

参考：[【kubernetes】史上最简单的k8s安装教程，一键安装 - 掘金][kubernetes_k8s_ -]

k8s安装脚本 [https://www.aliyundrive.com/s/tA8xzTvq2zc][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。

[785eff697f3e4bd2a1a0877963e62b72.png]: https://img-blog.csdnimg.cn/785eff697f3e4bd2a1a0877963e62b72.png
[1c4a32b602a54bd2baa76bc25909529c.png]: https://img-blog.csdnimg.cn/1c4a32b602a54bd2baa76bc25909529c.png
[https_zzzili.blog.csdn.net_article_details_130573272_spm_1001.2014.3001.5502]: https://zzzili.blog.csdn.net/article/details/130573272?spm=1001.2014.3001.5502
[Kubernetes kubectl run _ _ Kubernetes_K8S_Kubernetes]: http://docs.kubernetes.org.cn/468.html
[kubernetes_k8s_ -]: https://juejin.cn/post/7055180924681453582
[https_www.aliyundrive.com_s_tA8xzTvq2zc]: https://www.aliyundrive.com/s/tA8xzTvq2zc