1、创建需要映射的目录
mkdir -p /docker/consul/{server1,server2,server3}/{config,data}
mkdir -p /docker/consul/client1/{config,data}
2、创建网络环境
docker network create --driver=bridge --subnet=172.20.0.0/16 wfw
3、给文件夹授权
chmod -R 777 /docker/consul/
4、编写docker-compose.yml
cat > /docker/consul/docker-compose.yml <<END
version: '3'
services:
consulnode1:
image: consul
container_name: consulnode1
command: agent -server -bootstrap-expect=3 -config-dir=/consul/config -node=consulnode1 -bind=0.0.0.0 -client=0.0.0.0 -datacenter=dc1
volumes:
- /docker/consul/server1/data:/consul/data
- /docker/consul/server1/config:/consul/config
networks:
- wfw
consulnode2:
image: consul
container_name: consulnode2
command: agent -server -config-dir=/consul/config -retry-join=consulnode1 -node=consulnode2 -bind=0.0.0.0 -client=0.0.0.0 -datacenter=dc1
volumes:
- /docker/consul/server2/data:/consul/data
- /docker/consul/server2/config:/consul/config
depends_on:
- consulnode1
networks:
- wfw
consulnode3:
image: consul
container_name: consulnode3
command: agent -server -config-dir=/consul/config -retry-join=consulnode1 -node=consulnode3 -bind=0.0.0.0 -client=0.0.0.0 -datacenter=dc1
volumes:
- /docker/consul/server3/data:/consul/data
- /docker/consul/server3/config:/consul/config
depends_on:
- consulnode1
networks:
- wfw
consulnode4:
image: consul
container_name: consulnode4
command: agent -config-dir=/consul/config -retry-join=consulnode1 -node=consulnode4 -bind=0.0.0.0 -client=0.0.0.0 -datacenter=dc1 -ui
volumes:
- /docker/consul/client1/data:/consul/data
- /docker/consul/client1/config:/consul/config
ports:
- 8500:8500
depends_on:
- consulnode2
- consulnode3
networks:
- wfw
networks:
wfw:
external: true
END
5、查看集群和leader
进入目录
cd /docker/consul/
#启动
docker-compose up -d
#查看列表
docker exec -t consulnode1 consul members
#查看谁是领导者
docker exec -t consulnode1 consul operator raft list-peers
6、打开localhost:8500查看node
7、使用命令进行集群测试
docker exec -t consulnode1 consul kv put hello world # hello 是key，world 是value 意思就是put了一个字典项
#显示后面内容为正常：Success! Data written to: hello
#从其他consul获取值
docker exec -t consulnode2 consul kv get hello
#显示world，表示集群数据同步了。
8、停止docker中consolnode1，查看leader重新选举
docker stop consulnode1 #停止容器
docker exec -t consulnode1 consul operator raft list-peers #查看当前列表，可以看到leader发生变化
#重复第7步可查看集群消息同步
