k8s相关内容

1. 安装 openssh-server，提供远程连接

   sudo apt install -y openssh-server
   

   # 修改root用户的密码
   sudo passwd root
   

   # 修改ssh配置文件
   sudo vi /etc/ssh/sshd_config
   

   # 允许root用户远程连接
   PermitRootLogin yes
   

   # 重启 ssh
   sudo systemctl restart ssh
   # /etc/init.d/ssh restart
   

2. 使用 root 用户执行以下命令

3. 安装 vim

   sudo apt install -y vim
   

4. 安装 vim

   sudo apt install -y wget
   

5. 将主机名指向本机IP，主机名只能包含：字母、数字、-（横杠）、.（点）

   1. 获取主机名

      hostname
      

   2. 临时设置主机名

      hostname 主机名
      

   3. 永久设置主机名

      sudo echo '主机名' > /etc/hostname
      

   4. 编辑 hosts

      sudo vim /etc/hosts
      

6. 关闭防火墙

7. 关闭交换空间

   sudo swapoff -a
   sudo sed -i 's/.*swap.*/#&/' /etc/fstab
   

8. 安装 Docker

   sudo apt-get remove docker docker-engine docker.io containerd runc
   sudo apt-get update
   
   # 更新apt包索引并安装包以允许apt通过 HTTPS 使用存储库：
   sudo apt-get install -y ca-certificates curl gnupg lsb-release
   
   # 添加 Docker 的官方 GPG 密钥
   sudo mkdir -p /etc/apt/keyrings
   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
   
   # 设置稳定存储库
   # echo \
   #  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
   #  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
   # 由于docker暂未提供 22.10 的安装包，这里使用 22.04 的安装包
    echo \
     "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
     jammy stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
   
   sudo chmod a+r /etc/apt/keyrings/docker.gpg
   sudo apt-get update
   
   # 安装 Docker 引擎
   sudo apt-get update
   sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
   
   sudo docker info
   # sudo systemctl status docker
   sudo systemctl list-unit-files | grep docker
   
   # 启动 docker 时，会启动 containerd
   # sudo systemctl status containerd.service
   
   sudo systemctl stop containerd.service
   
   sudo cp /etc/containerd/config.toml /etc/containerd/config.toml.bak
   sudo containerd config default > $HOME/config.toml
   sudo cp $HOME/config.toml /etc/containerd/config.toml
   
   # 修改 /etc/containerd/config.toml 文件后，要将 docker、containerd 停止后，再启动
   sudo sed -i "s#registry.k8s.io/pause#registry.cn-hangzhou.aliyuncs.com/google_containers/pause#g" /etc/containerd/config.toml
   # https://kubernetes.io/zh-cn/docs/setup/production-environment/container-runtimes/#containerd-systemd
   # 确保 /etc/containerd/config.toml 中的 disabled_plugins 内不存在 cri
   sudo sed -i "s#SystemdCgroup = false#SystemdCgroup = true#g" /etc/containerd/config.toml
   
   sudo systemctl enable --now containerd.service
   # sudo systemctl status containerd.service
   
   # sudo systemctl status docker.service
   sudo systemctl restart docker.service
   # sudo systemctl status docker.service
   sudo systemctl enable docker.service
   systemctl list-unit-files | grep docker
   
   sudo tee /etc/docker/daemon.json <<-'EOF'
   {
     "registry-mirrors": ["https://hnkfbj7x.mirror.aliyuncs.com"],
       "exec-opts": ["native.cgroupdriver=systemd"]
   }
   EOF
   
   sudo systemctl daemon-reload
   sudo systemctl restart docker
   sudo docker info
   

   systemctl status docker.service
   

   systemctl status containerd.service
   

9. 安装 k8s 1.25.3 所需依赖
   文档：Kubernetes镜像

   sudo apt-get update && sudo apt-get install -y apt-transport-https
   curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo apt-key add - 
   

   sudo vim /etc/apt/sources.list.d/kubernetes.list
   

   deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
   

   sudo apt-get update
   # sudo apt-cache madison kubelet
   # sudo apt-cache madison kubeadm 
   # sudo apt-cache madison kubectl
   sudo apt-get install -y kubelet=1.25.3-00 kubeadm=1.25.3-00 kubectl=1.25.3-00
   sudo systemctl daemon-reload
   sudo systemctl restart kubelet
   sudo systemctl enable kubelet
   

   sudo systemctl status kubelet
   

10. 已上命令需要在控制面板与node节点执行，并确保没有错误与警告

11. 已上命令需要在控制面板与node节点执行，并确保没有错误与警告

12. 已上命令需要在控制面板与node节点执行，并确保没有错误与警告

13. 控制面板：初始化

    sudo kubeadm init --image-repository=registry.aliyuncs.com/google_containers
    
    mkdir -p $HOME/.kube
    sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
    sudo chown $(id -u):$(id -g) $HOME/.kube/config
    
    kubectl cluster-info
    
    # 初始化失败后，可进行重置，重置命令：kubeadm reset
    
    # 执行成功后，会出现类似下列内容：
    # kubeadm join 192.168.61.142:6443 --token 66l0ur.370hug1iiyra1or9 \
    # 	--discovery-token-ca-cert-hash sha256:3f3bacdbc4162511909b066ffccf06226d2c53fb6cefbc9b92789260d001359e 
    

14. 控制面板：

    kubectl get pods --all-namespaces -o wide
    

    kubectl get nodes
    

    kubectl get cs