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  • Docker 搭建 etcd 集群及管理

    环境 

    host1 10.1.99.13

    host2 10.1.99.14

    host3 10.1.99.15

    host4 10.1.99.12(用于测试添加删除节点)

    初始化集群

    host1 

    $ docker run --restart always -d -v /usr/share/ca-certificates/:/etc/ssl/certs -p 4001:4001 -p 2380:2380 -p 2379:2379 
     --name etcd quay.io/coreos/etcd 
     etcd 
     --name etcd0 
     --advertise-client-urls http://10.1.99.13:2379,http://10.1.99.13:4001 
     --listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 
     --initial-advertise-peer-urls http://10.1.99.13:2380 
     --listen-peer-urls http://0.0.0.0:2380 
     --initial-cluster-token etcd-cluster-1 
     --initial-cluster etcd0=http://10.1.99.13:2380,etcd1=http://10.1.99.14:2380,etcd2=http://10.1.99.15:2380 
     --initial-cluster-state new  

    host2

    $ docker run --restart always -d -v /usr/share/ca-certificates/:/etc/ssl/certs -p 4001:4001 -p 2380:2380 -p 2379:2379 
     --name etcd quay.io/coreos/etcd 
     etcd 
     --name etcd1 
     --advertise-client-urls http://10.1.99.14:2379,http://10.1.99.14:4001 
     --listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 
     --initial-advertise-peer-urls http://10.1.99.14:2380 
     --listen-peer-urls http://0.0.0.0:2380 
     --initial-cluster-token etcd-cluster-1 
     --initial-cluster etcd0=http://10.1.99.13:2380,etcd1=http://10.1.99.14:2380,etcd2=http://10.1.99.15:2380 
     --initial-cluster-state new
    

    host3

    $ docker run --restart always -d -v /usr/share/ca-certificates/:/etc/ssl/certs -p 4001:4001 -p 2380:2380 -p 2379:2379 
     --name etcd quay.io/coreos/etcd 
     etcd 
     -name etcd2 
     --advertise-client-urls http://10.1.99.15:2379,http://10.1.99.15:4001 
     --listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 
     --initial-advertise-peer-urls http://10.1.99.15:2380 
     --listen-peer-urls http://0.0.0.0:2380 
     --initial-cluster-token etcd-cluster-1 
     --initial-cluster etcd0=http://10.1.99.13:2380,etcd1=http://10.1.99.14:2380,etcd2=http://10.1.99.15:2380 
     --initial-cluster-state new
    

    验证

    #选择任意一个节点 进入 etcd shell
    $ docker exec -it etcd bin/sh
    
    # 查看节点状态
    $ etcdctl member list
    
    52a25183c1fa5a39: name=etcd0 peerURLs=http://10.1.99.13:2380 clientURLs=http://10.1.99.13:2379,http://10.1.99.13:4001 isLeader=false
    69aa775a244f2954: name=etcd1 peerURLs=http://10.1.99.14:2380 clientURLs=http://10.1.99.14:2379,http://10.1.99.14:4001 isLeader=true
    f18991cb367747f3: name=etcd2 peerURLs=http://10.1.99.15:2380 clientURLs=http://10.1.99.15:2379,http://10.1.99.15:4001 isLeader=false
    
    #查看集群状态
    etcdctl cluster-health
    
    member 52a25183c1fa5a39 is healthy: got healthy result from http://10.1.99.13:2379
    member 69aa775a244f2954 is healthy: got healthy result from http://10.1.99.14:2379
    member f18991cb367747f3 is healthy: got healthy result from http://10.1.99.15:2379
    cluster is healthy
    
    #插入一条记录
    $ etcdctl set /home/etcdtest value
    value
    #读取插入记录 在其他节点执行获取到相同结果
    $ etcdctl get /home/etcdtest 
    value
    

    集群管理在集群中加入一个节点

    #在现有的集群中执行以下命令
    $ etcdctl member add etcd3 http://10.1.99.12:2380
    
    Added member named etcd3 with ID 7b33d7070ed90c25 to cluster
    
    ETCD_NAME="etcd3"
    ETCD_INITIAL_CLUSTER="etcd0=http://10.1.99.13:2380,etcd1=http://10.1.99.14:2380,etcd3=http://10.1.99.12:2380,etcd2=http://10.1.99.15:2380"
    ETCD_INITIAL_CLUSTER_STATE="existing"
    
    #在对应的待加入的节点上
    $ docker run --restart always -d -v /usr/share/ca-certificates/:/etc/ssl/certs -p 4001:4001 -p 2380:2380 -p 2379:2379 
     --name etcd quay.io/coreos/etcd 
     etcd 
     --name etcd3 
     --advertise-client-urls http://10.1.99.12:2379,http://10.1.99.12:4001 
     --listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 
     --initial-advertise-peer-urls http://10.1.99.12:2380 
     --listen-peer-urls http://0.0.0.0:2380 
     --initial-cluster-token etcd-cluster-1 
     --initial-cluster etcd0=http://10.1.99.13:2380,etcd1=http://10.1.99.14:2380,etcd3=http://10.1.99.12:2380,etcd2=http://10.1.99.15:2380 
     --initial-cluster-state existing
    注意事项:
    1 使用上面生成的配置内容分别修改对应的属性
    2  设置 --initial-cluster-state existing
    
    
    删除节点,
    #在现有的集群中执行以下命令
    #显示当前集群中的所用节点信息
    $ etcdctl member list
    52a25183c1fa5a39: name=etcd0 peerURLs=http://10.1.99.13:2380 clientURLs=http://10.1.99.13:2379,http://10.1.99.13:4001 isLeader=false
    69aa775a244f2954: name=etcd1 peerURLs=http://10.1.99.14:2380 clientURLs=http://10.1.99.14:2379,http://10.1.99.14:4001 isLeader=true
    7b33d7070ed90c25: name=etcd3 peerURLs=http://10.1.99.12:2380 clientURLs=http://10.1.99.12:2379,http://10.1.99.12:4001 isLeader=false
    f18991cb367747f3: name=etcd2 peerURLs=http://10.1.99.15:2380 clientURLs=http://10.1.99.15:2379,http://10.1.99.15:4001 isLeader=false 
    
    #在集群中剔除待删除节点
    $ etcdctl member remove 7b33d7070ed90c25
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  • 原文地址:https://www.cnblogs.com/zhangeamon/p/6139964.html
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