docker搭建swarm集群

环境准备

主机名           IP                               角色

manger1       192.168.111.47           管理节点

worker1         192.168.111.48           工作节点

worker2         192.168.111.49           工作节点

注：三台主机都已经拉去完swarm和nginx的镜像

1、创建新集群

[root@manager1 ~]# docker swarm init --advertise-addr 192.168.111.47
Swarm initialized: current node (d4tpuiqifp22v7ayfedhpnovb) is now a manager.

To add a worker to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-4yeoz7sm372dsj1setf7o4g7q5dktrtg4r1olodjwi50k4me7m-bvgrx52c9kcfyy0e9uput49p1 192.168.111.47:2377

To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

2、添加工作节点到集群当中

[root@worker1 ~]#  docker swarm join --token SWMTKN-1-4yeoz7sm372dsj1setf7o4g7q5dktrtg4r1olodjwi50k4me7m-bvgrx52c9kcfyy0e9uput49p1 192.168.111.47:2377
This node joined a swarm as a worker.

[root@worker2 ~]#  docker swarm join --token SWMTKN-1-4yeoz7sm372dsj1setf7o4g7q5dktrtg4r1olodjwi50k4me7m-bvgrx52c9kcfyy0e9uput49p1 192.168.111.47:2377
This node joined a swarm as a worker.

3、发布服务到集群

[root@manager1 ~]# docker service create -p 80:80 --replicas 1 --name nginx1 nginx:1.27.4
4ar0vw0xy0e317m6owywi437b
overall progress: 1 out of 1 tasks 
1/1: running   
verify: Service 4ar0vw0xy0e317m6owywi437b converged 

4、查看集群

[root@manager1 ~]# docker service ls
ID             NAME      MODE         REPLICAS   IMAGE          PORTS
4ar0vw0xy0e3   nginx1    replicated   1/1        nginx:1.27.4   *:80->80/tcp

5、扩展多个集群

[root@manager1 ~]# docker service scale nginx1=3
nginx1 scaled to 3
overall progress: 3 out of 3 tasks 
1/3: running   
2/3: running   
3/3: running   
verify: Service nginx1 converged 

6.查看集群的状态和节点

[root@manager1 ~]# docker node ls
ID                            HOSTNAME   STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
d4tpuiqifp22v7ayfedhpnovb *   manager1   Ready     Active         Leader           28.0.4
kewgwr19mqqg6iz7vv6iyyutd     worker1    Ready     Active                               28.0.4
cw41gpypufogk61jkiqch3zpf       worker2    Ready     Active                               28.0.4
[root@worker1 ~]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS         PORTS     NAMES
04ee3f6e746e   nginx:1.27.4   "/docker-entrypoint.…"   2 minutes ago   Up 2 minutes   80/tcp    nginx1.2.cj1yy7wwvm9iz7taa1zgdw038
[root@worker2 ~]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS         PORTS     NAMES
2659e0546eef   nginx:1.27.4   "/docker-entrypoint.…"   2 minutes ago   Up 2 minutes   80/tcp    nginx1.3.desr92ncuerwksk9mfwx8lqyz

7、停止并删除发布服务

[root@manager1 ~]# docker service rm nginx1
nginx1

[root@worker1 ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
 

[root@worker2 ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES