• etcd集群的搭建


    由于最近在学习kubernetes,etcd作为kubernetes集群的主数据库,必须先启动。

    etcds实例名称 IP地址 Hostname
    etcd 1 192.168.142.161 kubernetes-node1.example.com
    etcd 2 192.168.142.162 kubernetes-node2.example.com
    etcd 3 192.168.142.163 kubernetes-node3.example.com
    从GitHub官网上下载etcd发布的二进制文件,etcd和etcdctl文件复制到/usr/bin目录。
    • 设置systemd服务文件。
    vim /usr/lib/systemd/system/etcd.service
    内容如下:
    [Unit]
    Description=Etcd Server
    After=network.target
    
    
    [Service]
    Type=simple
    WorkingDirectory=/var/lib/etcd/   
    EnvironmentFile=-/etc/etcd/etcd.conf #配置文件路径
    ExecStart=/usr/bin/etcd
    Type=notify
    [Install]
    WantedBy=multi-user.target
    
    • 编写/etc/etcd/etcd.conf文件
    vim /etc/etcd/etcd.conf
    # [member]
    ETCD_NAME=etcd1   #etcd实例名称
    ETCD_DATA_DIR="/var/lib/etcd"  #etcd数据保存目录
    ETCD_LISTEN_CLIENT_URLS="http://192.168.142.161:2379,http://127.0.0.1:2379"
    #供外部客户端使用的url
    ETCD_ADVERTISE_CLIENT_URLS="http://192.168.142.161:2379,http://127.0.0.1:2379"
    #广播给外部客户端使用的url
    
    #[cluster]
    ETCD_LISTEN_PEER_URLS="http://192.168.142.161:2380"   #集群内部通信使用的URL
    ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.142.161:2380"
    #广播给集群内其他成员访问的URL
    ETCD_INITIAL_CLUSTER="etcd1=http://192.168.142.161:2380,etcd2=http://192.168.142.162:2380,etcd3=http://192.168.142.163:2380"
    #初始集群成员列表
    ETCD_INITIAL_CLUSTER_STATE="new"
    #初始集群状态,new为新建集群
    ETCD_INITIAL_CLUSTER_TOKEN="k8s-etcd-cluster"  #集群的名称
    
    • 启动etcd1服务器上的etcd服务。

      systemctl restart etcd

    • etcd2和etcd3为加入k8s-etcd-cluster集群的实例,需要将其ETCD_INITIAL_CLUSTER_STATE设置为"exist"。etcd2的完整配置如下:

    # [member]
    ETCD_NAME=etcd2
    ETCD_DATA_DIR="/var/lib/etcd"
    ETCD_LISTEN_CLIENT_URLS="http://192.168.142.162:2379,http://127.0.0.1:2379"
    ETCD_ADVERTISE_CLIENT_URLS="http://192.168.142.162:2379,http://127.0.0.1:2379"
    
    #[cluster]
    ETCD_LISTEN_PEER_URLS="http://192.168.142.162:2380"
    ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.142.162:2380"
    ETCD_INITIAL_CLUSTER="etcd1=http://192.168.142.161:2380,etcd2=http://192.168.142.162:2380,etcd3=http://192.168.142.163:2380"
    ETCD_INITIAL_CLUSTER_STATE="exist"
    ETCD_INITIAL_CLUSTER_TOKEN="k8s-etcd-cluster"
    
    • 启动etcd2和etcd3服务器上的etcd服务。

      systemctl restart etcd

      启动完成后,在任意节点执行etcdctl cluster-healthy命令来查看运行状态。

      使用etcdctl member list 来查看集群中的成员列表。

    另外一种安装方法
    etcd集群搭建
    下载二进制软件包
    https://github.com/coreos/etcd/releases	  
    
    解压
    
    将两个执行文件复制到/usr/bin/
    etcd和etcdctl文件复制到/usr/bin目录
    
    配置etcd-1
    
    vi /etc/etcd/etcd.yml
    
    
    name: etcd-1
    data-dir: /var/lib/etcd
    listen-client-urls: http://163.44.167.92:2379,http://127.0.0.1:2379
    advertise-client-urls: http://163.44.167.92:2379,http://127.0.0.1:2379
    listen-peer-urls: http://163.44.167.92:2380
    initial-advertise-peer-urls: http://163.44.167.92:2380
    initial-cluster: etcd-1=http://163.44.167.92:2380,etcd-2=http://150.95.148.52:2380,etcd-3=http://133.130.122.48:2380
    initial-cluster-token: etcd-cluster-token
    initial-cluster-state: new
    
    配置etcd-2
    
    vi /etc/etcd/etcd.yml
    name: etcd-2
    data-dir: /var/lib/etcd
    listen-client-urls: http://150.95.148.52:2379,http://127.0.0.1:2379
    advertise-client-urls: http://150.95.148.52:2379,http://127.0.0.1:2379
    listen-peer-urls: http://150.95.148.52:2380
    initial-advertise-peer-urls: http://150.95.148.52:2380
    initial-cluster: etcd-1=http://163.44.167.92:2380,etcd-2=http://150.95.148.52:2380,etcd-3=http://133.130.122.48:2380
    initial-cluster-token: etcd-cluster-token
    initial-cluster-state: new
    
    
    配置etcd-3
    name: etcd-3
    data-dir: /var/lib/etcd
    listen-client-urls: http://133.130.122.48:2379,http://127.0.0.1:2379
    advertise-client-urls: http://133.130.122.48:2379,http://127.0.0.1:2379
    listen-peer-urls: http://133.130.122.48:2380
    initial-advertise-peer-urls: http://133.130.122.48:2380
    initial-cluster: etcd-1=http://163.44.167.92:2380,etcd-2=http://150.95.148.52:2380,etcd-3=http://133.130.122.48:2380
    initial-cluster-token: etcd-cluster-token
    initial-cluster-state: new
    
    
    
    最后启动
    etcd --config-file=/etc/etcd/etcd.yml &
    
    查看成员
    etcdctl member list
    每个节点上执行查看健康状态
    etcdctl cluster-health
    
    
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  • 原文地址:https://www.cnblogs.com/skymyyang/p/9067280.html
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