环境说明：
| IP | 主机名 |
|---|---|
| 192.168.111.152 | docker-node1 |
| 192.168.111.153 | docker-node2 |
| 192.168.111.154 | docker-node3 |
docker-node1作为swarm管理节点
创建集群
创建主节点
[root@docker-node1 ~]# docker swarm init --advertise-addr 192.168.111.152
Swarm initialized: current node (ntnheq4yt2r4sr2aml1l13rkt) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join \
--token SWMTKN-1-1f3thb4mu0rfzlh3mn14i2xkn2q8yvz1r5c438x3zqsbu3dybt-0z6ie4bn7yb20pc1xnsed8z1s \
192.168.111.152:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
将node节点加入集群
[root@docker-node2 ~]# docker swarm join \
--token SWMTKN-1-1f3thb4mu0rfzlh3mn14i2xkn2q8yvz1r5c438x3zqsbu3dybt-0z6ie4bn7yb20pc1xnsed8z1s \
192.168.111.152:2377
[root@docker-node3 ~]# docker swarm join \
--token SWMTKN-1-1f3thb4mu0rfzlh3mn14i2xkn2q8yvz1r5c438x3zqsbu3dybt-0z6ie4bn7yb20pc1xnsed8z1s \
192.168.111.152:2377
在主节点查看集群信息
[root@docker-node1 ~]# docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
2mfuq3t5oidnxasut31689ow1 docker-node3 Ready Active
cdp0z0tpqmfc5lpuzdd4gpk0x docker-node2 Ready Active
ntnheq4yt2r4sr2aml1l13rkt * docker-node1 Ready Active Leader
查看将节点加入集群命令
[root@docker-node1 ~]# docker swarm join-token worker
To add a worker to this swarm, run the following command:
docker swarm join \
--token SWMTKN-1-1f3thb4mu0rfzlh3mn14i2xkn2q8yvz1r5c438x3zqsbu3dybt-0z6ie4bn7yb20pc1xnsed8z1s \
192.168.111.152:2377
集群中创建容器
[root@docker-node1 ~]# docker service create --replicas 1 --name nginx -d nginx
- replicas: 创建副本数量
查看各节点容器分布状况
[root@docker-node1 ~]# docker service ps nginx
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
js69hnpp9pf7 nginx.1 nginx:latest docker-node3 Running Running 27 minutes ago
qznuk4gl6osp nginx.2 nginx:latest docker-node2 Running Running 27 minutes ago
将节点移出集群
[root@docker-node1 ~]# docker swarm leave
swarm集群自定义网络
因集群中跨主机间的docker容器网络不通，所以需要通过自定义网络将各主机间的容器连到同一个网段
查看docker 默认网络
[root@docker-node1 ~]# docker network list
NETWORK ID NAME DRIVER SCOPE
2145cfc9514e bridge bridge local
60a6c66c590d docker_gwbridge bridge local
3ef8c4c1c66e host host local
7wsqirbzvzvu ingress overlay swarm
665ae0d15f1b none null local
添加自定义网络
[root@docker-node1 ~]# docker network create --driver overlay mynet
创建容器，并将容器加入自定义网络
[root@docker-node1 ~]# docker service create --replicas 2 --network mynet --name nginx -d nginx
