创建一个service
在swarm模式下，基本上就不会使用docker run了
# swarm-manager节点
docker service create --name busybox busybox /bin/sh -c "while true;do sleep 3600;done"查看service列表
[vagrant@swarm-manager ~]$ docker service ls| ID | NAME | MODE | REPLICAS | IMAGE | PORTS |
|---|---|---|---|---|---|
| 426kwqf7gxif | busybox | replicated | 1/1 | busybox:latest |
- replicated 表示此服务可以水平扩展
- 1/1 分母表示scale的数量，分子表示running的数量
水平扩展service
# 水平扩展为5个
docker service scale busybox=5再次查看service列表
[vagrant@swarm-manager ~]$ docker service ls| ID | NAME | MODE | REPLICAS | IMAGE | PORTS |
|---|---|---|---|---|---|
| 426kwqf7gxif | busybox | replicated | 5/5 | busybox:latest |
查看service的分布
docker service ps busybox| ID | NAME | IMAGE | NODE | DESIRED STATE | CURRENT STATE | ERROR | PORTS |
|---|---|---|---|---|---|---|---|
| gf76bj8oe9u7 | busybox.1 | busybox:latest | swarm-manager | Running | Running 9 minutes ago | ||
| 5htg690swaw2 | busybox.2 | busybox:latest | swarm-work2 | Running | Running about a minute ago | ||
| b6v2qfmke4hu | busybox.3 | busybox:latest | swarm-manager | Running | Running about a minute ago | ||
| ywyt6d4pf918 | busybox.4 | busybox:latest | swarm-work1 | Running | Running about a minute ago | ||
| nutiiyw70rz2 | busybox.5 | busybox:latest | swarm-work2 | Running | Running about a minute ago |
模拟容器down掉
# swarm-work2 节点
docker container stop fc23134c1f30
fc23134c1f30然后我们就可以看出scale会自动恢复为5
[vagrant@swarm-manager ~]$ docker service ps busybox
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
gf76bj8oe9u7 busybox.1 busybox:latest swarm-manager Running Running 34 minutes ago
24boc8ooo2wd busybox.2 busybox:latest swarm-work1 Ready Ready less than a second ago
5htg690swaw2 \_ busybox.2 busybox:latest swarm-work2 Shutdown Failed less than a second ago "task: non-zero exit (137)"
b6v2qfmke4hu busybox.3 busybox:latest swarm-manager Running Running 27 minutes ago
ywyt6d4pf918 busybox.4 busybox:latest swarm-work1 Running Running 27 minutes ago
nutiiyw70rz2 busybox.5 busybox:latest swarm-work2 Running Running 27 minutes ago
[vagrant@swarm-manager ~]$ docker service ps busybox
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
gf76bj8oe9u7 busybox.1 busybox:latest swarm-manager Running Running 34 minutes ago
24boc8ooo2wd busybox.2 busybox:latest swarm-work1 Running Running 8 seconds ago
5htg690swaw2 \_ busybox.2 busybox:latest swarm-work2 Shutdown Failed 13 seconds ago "task: non-zero exit (137)"
b6v2qfmke4hu busybox.3 busybox:latest swarm-manager Running Running 27 minutes ago
ywyt6d4pf918 busybox.4 busybox:latest swarm-work1 Running Running 27 minutes ago
nutiiyw70rz2 busybox.5 busybox:latest swarm-work2 Running Running 27 minutes ago这就是swarm的容器自动恢复机制了
service移除
docker service rm busybox
