docker搭建etcd集群环境

其实关于集群网上说的方案已经很多了，尤其是官网，只是这里我个人只有一个虚拟机，在开发环境下建议用docker-compose来搭建etcd集群.

1.拉取etcd镜像

docker pull quay.io/coreos/etcd

2.编辑docker-compose.yaml文件：

version: '2'
networks:
  byfn:
services:
  etcd1:
    image: quay.io/coreos/etcd
    container_name: etcd1
    command: etcd -name etcd1 -advertise-client-urls http://0.0.0.0:2379 -listen-client-urls http://0.0.0.0:2379 -listen-peer-urls http://0.0.0.0:2380 -initial-cluster-token etcd-cluster -initial-cluster "etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380" -initial-cluster-state new
    ports:
      - "12379:2379"
      - 2380
    networks:
      - byfn
  etcd2:
    image: quay.io/coreos/etcd
    container_name: etcd2
    command: etcd -name etcd2 -advertise-client-urls http://0.0.0.0:2379 -listen-client-urls http://0.0.0.0:2379 -listen-peer-urls http://0.0.0.0:2380 -initial-cluster-token etcd-cluster -initial-cluster "etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380" -initial-cluster-state new
    ports:
      - "22379:2379"
      - 2380
    networks:
      - byfn
  etcd3:
    image: quay.io/coreos/etcd
    container_name: etcd3
    command: etcd -name etcd3 -advertise-client-urls http://0.0.0.0:2379 -listen-client-urls http://0.0.0.0:2379 -listen-peer-urls http://0.0.0.0:2380 -initial-cluster-token etcd-cluster -initial-cluster "etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380" -initial-cluster-state new
    ports:
      - "32379:2379"
      - 2380
    networks:
      - byfn

3.启动服务验证：

docker-compose up
#docker-compose down
curl -L http://127.0.0.1:12379/v2/members #查看etcd1的数据
curl -L http://127.0.0.1:22379/v2/members #查看etcd2的数据
curl -L http://127.0.0.1:32379/v2/members #查看etcd3的数据
#也可以用命令行工具etcdctl
docker exec -t etcd1 etcdctl member list
#我们往一个node上上传数据，在其他node上就能下载到
curl -L http://127.0.0.1:12379/v2/keys/foo -XPUT -d value="Hello foo"
curl -L http://127.0.0.1:12379/v2/keys/foo1/foo1 -XPUT -d value="Hello foo1"
curl -L http://127.0.0.1:12379/v2/keys/foo2/foo2 -XPUT -d value="Hello foo2"
curl -L http://127.0.0.1:12379/v2/keys/foo2/foo21/foo21 -XPUT -d value="Hello foo21"
curl -L http://127.0.0.1:22379/v2/keys/foo
curl -L http://127.0.0.1:22379/v2/keys/foo2
curl -L http://127.0.0.1:22379/v2/keys/foo2?recursive=true

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参考：

ETCD 与 服务发现

Docker 搭建 etcd 集群 

Etcd项目介绍

etcd-io/etcd