kubernetes（三）二进制安装-etcd安装

淡淡的烟草味﹌ 2023-01-08 03:25 181阅读 0赞

## 部署 etcd（在master节点上执行） ##

1.  下载安装etcd
    
        cd /opt/k8s/work
        wget https://github.com/etcd-io/etcd/releases/download/v3.3.18/etcd-v3.3.18-linux-amd64.tar.gz
        tar -xvf etcd-v3.3.18-linux-amd64.tar.gz
2.  安装etcd
    
        cd /opt/k8s/work
        
        cp etcd-v3.3.18-linux-amd64/etcd* /opt/k8s/bin/
        chmod +x /opt/k8s/bin/*
3.  创建 etcd 证书和私钥
    
    1.  创建证书签名请求文件
        
            cd /opt/k8s/work
            cat > etcd-csr.json <<EOF
            {
              "CN": "etcd",
              "hosts": [
                "127.0.0.1",
                "192.168.0.107"
              ],
              "key": {
                "algo": "rsa",
                "size": 2048
              },
              "names": [
                {
                  "C": "CN",
                  "ST": "NanJing",
                  "L": "NanJing",
                  "O": "k8s",
                  "OU": "system"
                }
              ]
            }
            EOF
        
         *  指定授权使用该证书的 etcd 节点 IP 列表
    2.  生成证书和私钥
        
            cd /opt/k8s/work
            cfssl gencert -ca=/opt/k8s/work/ca.pem \
                -ca-key=/opt/k8s/work/ca-key.pem \
                -config=/opt/k8s/work/ca-config.json \
                -profile=kubernetes etcd-csr.json | cfssljson -bare etcd
            ls etcd*pem
    3.  安装证书
        
            cd /opt/k8s/work
            cp etcd*.pem /etc/etcd/cert/
4.  创建etcd启动文件
    
        cat> /etc/systemd/system/etcd.service<< EOF
        [Unit]
        Description=Etcd Server
        After=network.target
        After=network-online.target
        Wants=network-online.target
        Documentation=https://github.com/coreos
        
        [Service]
        Type=notify
        WorkingDirectory=/data/k8s/etcd/data
        ExecStart=/opt/k8s/bin/etcd \\
          --data-dir=/etc/etcd/cfg/etcd \\
          --name=etcd-chengf \\
          --cert-file=/etc/etcd/cert/etcd.pem \\
          --key-file=/etc/etcd/cert/etcd-key.pem \\
          --trusted-ca-file=/etc/kubernetes/cert/ca.pem \\
          --peer-cert-file=/etc/etcd/cert/etcd.pem \\
          --peer-key-file=/etc/etcd/cert/etcd-key.pem \\
          --peer-trusted-ca-file=/etc/kubernetes/cert/ca.pem \\
          --peer-client-cert-auth \\
          --client-cert-auth \\
          --listen-peer-urls=https://192.168.0.107:2380 \\
          --initial-advertise-peer-urls=https://192.168.0.107:2380 \\
          --listen-client-urls=https://192.168.0.107:2379,http://127.0.0.1:2379 \\
          --advertise-client-urls=https://192.168.0.107:2379 \\
          --initial-cluster-token=etcd-cluster-0\\
          --initial-cluster=etcd-chengf=https://192.168.0.107:2380 \\
          --initial-cluster-state=new \\
          --auto-compaction-mode=periodic \\
          --auto-compaction-retention=1 \\
          --max-request-bytes=33554432 \\
          --quota-backend-bytes=6442450944 \\
          --heartbeat-interval=250 \\
          --election-timeout=2000
        Restart=on-failure
        RestartSec=5
        LimitNOFILE=65536
        
        [Install]
        WantedBy=multi-user.target
        EOF
    
     *  WorkingDirectory、--data-dir：指定工作目录和数据目录，需在启动服务前创建这个目录；
     *  \--name：指定节点名称，当 --initial-cluster-state 值为 new 时，--name 的参数值必须位于 --initial-cluster 列表中；
     *  \--cert-file、--key-file：etcd server 与 client 通信时使用的证书和私钥；
     *  \--trusted-ca-file：签名 client 证书的 CA 证书，用于验证 client 证书；
     *  \--peer-cert-file、--peer-key-file：etcd 与 peer 通信使用的证书和私钥；
     *  \--peer-trusted-ca-file：签名 peer 证书的 CA 证书，用于验证 peer 证书；
5.  创建etcd数据目录
    
        mkdir -p /data/k8s/etcd/data
6.  启动 etcd 服务
    
        systemctl enable etcd && systemctl start etcd
7.  检查启动结果
    
        systemctl status etcd|grep Active
    
     *  确保状态为 active (running)，否则查看日志，确认原因
     *  如果出现异常，通过如下命令查看
        
            journalctl -u etcd
8.  验证服务状态
    
        export ETCD_ENDPOINTS=https://192.168.0.107:2379
        
        etcdctl \
        --endpoints=${ETCD_ENDPOINTS} \
        --ca-file=/etc/kubernetes/cert/ca.pem \
        --cert-file=/etc/etcd/cert/etcd.pem \
        --key-file=/etc/etcd/cert/etcd-key.pem cluster-health
    
        etcdctl \
        --endpoints=${ETCD_ENDPOINTS} \
        --ca-file=/etc/kubernetes/cert/ca.pem \
        --cert-file=/etc/etcd/cert/etcd.pem \
        --key-file=/etc/etcd/cert/etcd-key.pem member list
    
    输出结果
    
        root@master:/opt/k8s/work# etcdctl     --endpoints=${ETCD_ENDPOINTS}     --ca-file=/etc/kubernetes/cert/ca.pem     --cert-file=/etc/etcd/cert/etcd.pem     --key-file=/etc/etcd/cert/etcd-key.pem cluster-health

member c0d3b56a9878e38f is healthy: got healthy result from [https://192.168.0.107:2379][https_192.168.0.107_2379]  
cluster is healthy  
root@master:/opt/k8s/work\# etcdctl --endpoints=$\{ETCD\_ENDPOINTS\} --ca-file=/etc/kubernetes/cert/ca.pem --cert-file=/etc/etcd/cert/etcd.pem --key-file=/etc/etcd/cert/etcd-key.pemmember list  
c0d3b56a9878e38f: name=etcd-chengf peerURLs=https://192.168.0.107:2380 clientURLs=https://192.168.0.107:2379 isLeader=true  
\`\`\`

[https_192.168.0.107_2379]: https://192.168.0.107:2379