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1. 环境说明| 节点 | IP |
|---|
| etcd1 | 10.10.239.31 | | etcd2 | 10.10.239.32 | | etcd3 | 10.10.239.33 |
2. 部署
etcd1ymal文件 version: "3.0"services: etcd1: image: bitnami/etcd:latest container_name: etcd1 restart: always ports: - "2379:2379" - "2380:2380" environment: - ALLOW_NONE_AUTHENTICATION=yes #示例中我们不设置密码 - ETCD_NAME=etcd1 #节点自己的名字 - ETCD_ADVERTISE_CLIENT_URLS=http://10.10.239.31:2379 #告知集群自己的客户端地址 - ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379 #设置监听客户端通讯的URL列表 - ETCD_INITIAL_ADVERTISE_PEER_URLS=http://10.10.239.31:2380 #告知集群自己集群通讯地址 - ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380 #用于监听伙伴通讯的URL列表 - ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster #etcd 集群的初始化集群记号 - ETCD_INITIAL_CLUSTER=etcd1=http://10.10.239.31:2380,etcd2=http://10.10.239.32:2380,etcd3=http://10.10.239.33:2380 #集群成员 - ETCD_INITIAL_CLUSTER_STATE=new #初始化集群状态 volumes: - ./data:/bitnami/etcd 持久化 如果此时启动，会在当前目录下创建 ./data 目录，挂载到容器的 /bitnami/etcd ，但我们要注意的是，容器中启动etcd的用户并不是root用户，很可能没有在目录下创建文件的权限。我们有两个方案： 【方法一】给777权限（不建议） 【方法二】所属主改成对应宿主机用户（建议） 方法二操作： - 先给./data目录777权限
- 查看新生成的文件属主是宿主机哪个用户，就将./data目录属主改为哪个用户
- 再将权限改回755或750，重启容器
启动服务 [root@liubei-01 etcd1]# docker-compose up -d 查看结果 [root@liubei-01 etcd1]# docker-compose psName Command State Ports-----------------------------------------------------------------------------------------------etcd1 /opt/bitnami/scripts/etcd/ ... Up 0.0.0.0:2379->2379/tcp, 0.0.0.0:2380->2380/tcp
etcd2ymal文件 version: "3.0"services: etcd1: image: bitnami/etcd:latest container_name: etcd2 restart: always ports: - "2379:2379" - "2380:2380" environment: - ALLOW_NONE_AUTHENTICATION=yes - ETCD_NAME=etcd2 - ETCD_ADVERTISE_CLIENT_URLS=http://10.10.239.32:2379 - ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379 - ETCD_INITIAL_ADVERTISE_PEER_URLS=http://10.10.239.32:2380 - ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380 - ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster - ETCD_INITIAL_CLUSTER=etcd1=http://10.10.239.31:2380,etcd2=http://10.10.239.32:2380,etcd3=http://10.10.239.33:2380 - ETCD_INITIAL_CLUSTER_STATE=new volumes: - ./data:/bitnami/etcd 持久化（同上） 启动服务（同上）
etcd3ymal文件 version: "3.0"services: etcd1: image: bitnami/etcd:latest container_name: etcd3 restart: always ports: - "2379:2379" - "2380:2380" environment: - ALLOW_NONE_AUTHENTICATION=yes - ETCD_NAME=etcd3 - ETCD_ADVERTISE_CLIENT_URLS=http://10.10.239.33:2379 - ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379 - ETCD_INITIAL_ADVERTISE_PEER_URLS=http://10.10.239.33:2380 - ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380 - ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster - ETCD_INITIAL_CLUSTER=etcd1=http://10.10.239.31:2380,etcd2=http://10.10.239.32:2380,etcd3=http://10.10.239.33:2380 - ETCD_INITIAL_CLUSTER_STATE=new volumes: - ./data:/bitnami/etcd 持久化（同上） 启动服务（同上）
3. 验证
3.1 查看集群状态查看集群成员 I have no name!@555187fb758c:/opt/bitnami/etcd$ etcdctl --write-out=table member list+------------------+---------+-------+--------------------------+--------------------------+------------+| ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | IS LEARNER |+------------------+---------+-------+--------------------------+--------------------------+------------+| 57d6f74aaa8d5d3e | started | etcd1 | http://10.10.239.31:2380 | http://10.10.239.31:2379 | false || 9107e491ab549324 | started | etcd3 | http://10.10.239.33:2380 | http://10.10.239.33:2379 | false || e7b147006e212ca5 | started | etcd2 | http://10.10.239.32:2380 | http://10.10.239.32:2379 | false |+------------------+---------+-------+--------------------------+--------------------------+------------+ 查看本节点状态 I have no name!@555187fb758c:/opt/bitnami/etcd$ etcdctl --write-out=table endpoint status+----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |+----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+| 127.0.0.1:2379 | 57d6f74aaa8d5d3e | 3.5.4 | 20 kB | true | false | 2 | 10 | 10 | |+----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ 查看本节点健康状态 I have no name!@555187fb758c:/opt/bitnami/etcd$ etcdctl --write-out=table endpoint health+----------------+--------+------------+-------+| ENDPOINT | HEALTH | TOOK | ERROR |+----------------+--------+------------+-------+| 127.0.0.1:2379 | true | 3.736825ms | |+----------------+--------+------------+-------+
3.2 读写测试登录其中一个节点，进入容器，写一条数据
zai [root@liubei-01 etcd3]# docker exec -it 788 bashI have no name!@788dd01aaa79:/opt/bitnami/etcd$ etcdetcd etcdctlI have no name!@788dd01aaa79:/opt/bitnami/etcd$ etcdctl put name "liubei"OK 登录另一个节点，进入容器，读取数据 [root@liubei-02 ~]# docker exec -it 555 bashI have no name!@555187fb758c:/opt/bitnami/etcd$ etcdctl get namenameliubei
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