使用 rke 安裝 K8s 的程序

  • 安裝環境 Ubuntu 20.04.2 LTS x86_64
  • 兩個節點 IP : 10.20.0.35 / 10.20.0.37
  • apt 更新與安裝套件

    sudo apt update
    sudo apt-get install unzip curl software-properties-common snap -y

  • 安裝 Docker 19.03.14

    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
    sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
    sudo apt-get install docker-ce=5:19.03.14~3-0~ubuntu-focal docker-ce-cli=5:19.03.14~3-0~ubuntu-focal containerd.io -y

  • 安裝 kubectl

    sudo curl -LO https://dl.k8s.io/release/v1.18.17/bin/linux/amd64/kubectl
    sudo chmod a+x kubectl
    sudo mv ./kubectl /usr/local/bin/
    mkdir -p ~/.kube/

  • 關閉 swap

    sudo swapoff -a

  • 所有節點建立 rkeuser 帳號

    sudo useradd -s /bin/bash -d /home/rkeuser/ -m -G sudo rkeuser
    sudo passwd rkeuser
    sudo usermod -aG docker rkeuser

  • 配置免密登入-master節點-10.20.0.35
  • 確認所有節點 rkeuser 可以執行 docker 命令

    ssh [email protected]
    docker ps

  • 如有啟動 firewall 要開啟 port
    • 6443-KubeAPI
    • 2379-etcd
  • SSH server配置 TCP 轉發

    sudo vi /etc/ssh/sshd_config

    :
    AllowTcpForwarding yes
    :
    sudo systemctl reload sshd
  • 下載 rke 1.2.7

    wget https://github.com/rancher/rke/releases/download/v1.2.7/rke_linux-amd64
    sudo mv rke_linux-amd64 /usr/local/bin/rke
    sudo chmod +x /usr/local/bin/rke
    rke --version

  • 產生 rke 配置 K8s Cluster 檔

    rke config --name cluster.yml

  • 看輸入資訊
  • 檢視與編輯 cluster.yml 內容
    nodes:
    - address: 10.20.0.35
      port: "22"
      internal_address: 10.20.0.35
      role:
      - controlplane
      - worker
      - etcd
      hostname_override: ""
      user: rkeuser
      docker_socket: /var/run/docker.sock
      ssh_key: ""
      ssh_key_path: ~/.ssh/id_rsa
      ssh_cert: ""
      ssh_cert_path: ""
      labels: {}
      taints: []
    - address: 10.20.0.37
      port: "22"
      internal_address: 10.20.0.37
      role:
      - worker
      hostname_override: ""
      user: rkeuser
      docker_socket: /var/run/docker.sock
      ssh_key: ""
      ssh_key_path: ~/.ssh/id_rsa
      ssh_cert: ""
      ssh_cert_path: ""
      labels: {}
      taints: []
    services:
      etcd:
        image: ""
    :
    :
  • 開始執行安裝

    rke up --config cluster.yml

    因為要下載一些 images 需要等一些時間才會完成, 最後應該可以看到類似以下的訊息

    :
    INFO[0378] [addons] Executing deploy job rke-ingress-controller
    INFO[0405] [ingress] ingress controller nginx deployed successfully
    INFO[0405] [addons] Setting up user addons
    INFO[0405] [addons] no user addons defined
    INFO[0405] Finished building Kubernetes cluster successfully

  • 將產生的檔案備份起來

    $ ls -lt
    total 4476
    -rw-r-----  1 localadmin localadmin  105805 Apr  7 19:18 cluster.rkestate
    -rw-r-----  1 localadmin localadmin    5381 Apr  7 19:13 kube_config_cluster.yml
    -rw-r-----  1 localadmin localadmin    5653 Apr  7 19:12 cluster.yml

  • 複製 kubeconfig 檔案及驗證 kubeconfig 檔案

    cp kube_config_cluster.yml ~/.kube/config
    kubectl get nodes

    如果沒問題應該會出現類似以下的訊息

    $ kubectl get node
    NAME         STATUS   ROLES                      AGE     VERSION
    10.20.0.35   Ready    controlplane,etcd,worker   7m52s   v1.18.17
    10.20.0.37   Ready    worker                     7m47s   v1.18.17

  • 只要修改 cluster.yml 節點資料, 再執行以下指令即可

    rke up --update-only --config cluster.yml 

  • Exp. 加上 10.20.0.36
    • 前面所有節點準備程序都要進行
    • 修改 cluster.yml
      nodes:
      - address: 10.20.0.35
        port: "22"
        internal_address: 10.20.0.35
        role:
        - controlplane
        - worker
        - etcd
        hostname_override: ""
        user: rkeuser
        docker_socket: /var/run/docker.sock
        ssh_key: ""
        ssh_key_path: ~/.ssh/id_rsa
        ssh_cert: ""
        ssh_cert_path: ""
        labels: {}
        taints: []
      - address: 10.20.0.36
        port: "22"
        internal_address: 10.20.0.36
        role:
        - worker
        hostname_override: ""
        user: rkeuser
        docker_socket: /var/run/docker.sock
        ssh_key: ""
        ssh_key_path: ~/.ssh/id_rsa
        ssh_cert: ""
        ssh_cert_path: ""
        labels: {}
        taints: []
      - address: 10.20.0.37
        port: "22"
        internal_address: 10.20.0.37
        role:
        - worker
        hostname_override: ""
        user: rkeuser
        docker_socket: /var/run/docker.sock
        ssh_key: ""
        ssh_key_path: ~/.ssh/id_rsa
        ssh_cert: ""
        ssh_cert_path: ""
        labels: {}
        taints: []
      services:
        etcd:
      :
      :
  • 執行更新

    rke up --update-only --config cluster.yml

  • tech/rke-k8s.txt
  • 上一次變更: 2021/08/25 15:28
  • jonathan