Docker Swarm 入门示例5: 缩放服务

1. 打开manager1服务器 shell

2. 设置服务的期望容量 命令： docker service scale <SERVICE-ID>=<NUMBER-OF-TASKS>

   $ docker service scale helloworld=5
   helloworld scaled to 5
   
   

3. 查看服务运行节点 命令： docker service ps <SERVICE-ID>

   $ docker service ps helloworld
   ID                  NAME                IMAGE               NODE                DESIRED STATE       CURRENT STATE                ERROR                       PORTS
   i55lyst49m5t        helloworld.1        alpine:latest       ubuntu-1604-001     Running             Running 23 minutes ago
   b1h5uai64w51         \_ helloworld.1    alpine:latest       ubuntu-1604-003     Shutdown            Failed 23 minutes ago        "task: non-zero exit (1)"
   f3422ekz2d76        helloworld.2        alpine:latest       ubuntu-1604-002     Running             Running about a minute ago
   dnktr3xxmrvh        helloworld.3        alpine:latest       ubuntu-1604-001     Running             Running 49 seconds ago
   nts8hr8wp4fx         \_ helloworld.3    alpine:latest       ubuntu-1604-003     Shutdown            Failed 55 seconds ago        "task: non-zero exit (1)"
   63aybcfgcnh9         \_ helloworld.3    alpine:latest       ubuntu-1604-003     Shutdown            Failed about a minute ago    "task: non-zero exit (1)"
   fwixq1p9kfv3         \_ helloworld.3    alpine:latest       ubuntu-1604-003     Shutdown            Failed about a minute ago    "task: non-zero exit (1)"
   qpnexiadt8tc        helloworld.4        alpine:latest       ubuntu-1604-002     Running             Running 49 seconds ago
   lkog48cvbcjw         \_ helloworld.4    alpine:latest       ubuntu-1604-003     Shutdown            Failed 55 seconds ago        "task: non-zero exit (1)"
   wvu8erzlpdjp         \_ helloworld.4    alpine:latest       ubuntu-1604-003     Shutdown            Failed about a minute ago    "task: non-zero exit (1)"
   gk4mh3c08a49         \_ helloworld.4    alpine:latest       ubuntu-1604-003     Shutdown            Failed about a minute ago    "task: non-zero exit (1)"
   hw5ajb6n87sl        helloworld.5        alpine:latest       ubuntu-1604-001     Running             Running about a minute ago
   
   

4. 查看容器运行详情 打开对应节点shell 命令： docker ps

   $ docker ps
   CONTAINER ID        IMAGE                                                                 COMMAND                  CREATED             STATUS                          PORTS                    NAMES
   bd5005eb3609        alpine:latest                                                         "ping baidu.com"         2 minutes ago       Up 2 minutes                                             helloworld.3.dnktr3xxmrvhdt217vd3i9m1l
   3c4924203012        alpine:latest                                                         "ping baidu.com"         3 minutes ago       Up 3 minutes                                             helloworld.5.hw5ajb6n87sljcxd0zcn7agjk
   5d2d0a2d73c9        alpine:latest                                                         "ping baidu.com"         25 minutes ago      Up 25 minutes                                            helloworld.1.i55lyst49m5tsca49qicalc3m