Docker学习(10) Docker Swarm（下）

Swarm 服务

• 使用服务能够配置容器的属性：容器名、端口属性、接入网络和镜像
• 额外的特性：声明应用服务的期望状态

例子

• 做一个web前端服务，该服务有应用的镜像，5个实例来对应。

root@mgr1:~# docker service create --name web-fe \
> -p 80:80 \
> --replicas 5 \
> nigelpoulton/pluralsight-docker-ci
fcoairzvnxq7aeolc3k8mrr82

• docker service create 告知docker正在声明一个服务。

• --name 命名服务名称

• -p 将节点的端口映射到服务副本内部。

• --replicas 告知docker应该有几个此服务的副本。

• 所有服务都会被swarm持续监控

查看服务

• 查看swarm中运行的所有服务

root@mgr1:~# docker service ls
ID                  NAME                MODE                REPLICAS            IMAGE                                       PORTS
fcoairzvnxq7        web-fe              replicated          0/5                 nigelpoulton/pluralsight-docker-ci:latest   *:80->80/tcp

• 查看服务的副本列表及各服务的状态

root@mgr1:~# docker service  ps web-fe
ID                  NAME                IMAGE                                       NODE                DESIRED STATE       CURRENT STATE                ERROR               PORTS
fl93u9gehqgz        web-fe.1            nigelpoulton/pluralsight-docker-ci:latest   mgr3                Running             Preparing 10 minutes ago                         
k2n6z5dg8zv7        web-fe.2            nigelpoulton/pluralsight-docker-ci:latest   wrk2                Running             Running 34 seconds ago                           
m2pokv4qcmp6        web-fe.3            nigelpoulton/pluralsight-docker-ci:latest   mgr2                Running             Running 2 minutes ago                            
a2j57rhgtdq0        web-fe.4            nigelpoulton/pluralsight-docker-ci:latest   mgr1                Running             Running 4 minutes ago                            
3uhnqqccgywa        web-fe.5            nigelpoulton/pluralsight-docker-ci:latest   wrk1                Running             Running about a minute ago 

• 查看服务的更详细信息

root@mgr1:~# docker service inspect --pretty web-fe

ID:     fcoairzvnxq7aeolc3k8mrr82
Name:       web-fe
Service Mode:   Replicated
 Replicas:  5
Placement:
UpdateConfig:
 Parallelism:   1
 On failure:    pause
 Monitoring Period: 5s
 Max failure ratio: 0
 Update order:      stop-first
RollbackConfig:
 Parallelism:   1
 On failure:    pause
 Monitoring Period: 5s
 Max failure ratio: 0
 Rollback order:    stop-first
ContainerSpec:
 Image:     nigelpoulton/pluralsight-docker-ci:latest@sha256:7a6b0125fe7893e70dc63b2c42ad779e5866c6d2779ceb9b12a28e2c38bd8d3d
 Init:      false
Resources:
Endpoint Mode:  vip
Ports:
 PublishedPort = 80
  Protocol = tcp
  TargetPort = 80
  PublishMode = ingress 

• --pretty 限制输出仅包含最感兴趣的内容，以易于阅读的方式打开。

副本服务& 全局服务

• 服务默认的复制模式是副本模式：部署期望数量的服务副本，尽可能的将各个服务分布到整个集群当中
• 全局模式：每个节点仅运行一个服务。——：--mode global参数来实现全局模式

服务的扩缩容

• 增产10个服务副本

• 查看服务副本在各个节点的平均分布

root@mgr2:~# docker service ps web-fe
ID                  NAME                IMAGE                                       NODE                DESIRED STATE       CURRENT STATE              ERROR               PORTS
fl93u9gehqgz        web-fe.1            nigelpoulton/pluralsight-docker-ci:latest   mgr3                Running             Preparing 22 minutes ago                       
k2n6z5dg8zv7        web-fe.2            nigelpoulton/pluralsight-docker-ci:latest   wrk2                Running             Running 12 minutes ago                         
m2pokv4qcmp6        web-fe.3            nigelpoulton/pluralsight-docker-ci:latest   mgr2                Running             Running 14 minutes ago                         
a2j57rhgtdq0        web-fe.4            nigelpoulton/pluralsight-docker-ci:latest   mgr1                Running             Running 16 minutes ago                         
3uhnqqccgywa        web-fe.5            nigelpoulton/pluralsight-docker-ci:latest   wrk1                Running             Running 13 minutes ago                         
d9qxyhwi5h5c        web-fe.6            nigelpoulton/pluralsight-docker-ci:latest   wrk3                Running             Preparing 49 seconds ago                       
1ut5mrfw57cu        web-fe.7            nigelpoulton/pluralsight-docker-ci:latest   wrk3                Running             Preparing 49 seconds ago                       
5onxk17wm44b        web-fe.8            nigelpoulton/pluralsight-docker-ci:latest   wrk2                Running             Running 48 seconds ago                         
m8xd7zl4niur        web-fe.9            nigelpoulton/pluralsight-docker-ci:latest   mgr3                Running             Preparing 49 seconds ago                       
l5isb4gm7m70        web-fe.10           nigelpoulton/pluralsight-docker-ci:latest   mgr2                Running             Running 48 seconds ago 

• 再将服务副本从10降到5

root@mgr1:~# docker service scale web-fe=10
web-fe scaled to 10
overall progress: 6 out of 10 tasks 
overall progress: 6 out of 10 tasks 
overall progress: 8 out of 10 tasks

• 查看服务副本的分布

root@mgr1:~# docker service ps web-fe
ID                  NAME                IMAGE                                       NODE                DESIRED STATE       CURRENT STATE                     ERROR               PORTS
k2n6z5dg8zv7        web-fe.2            nigelpoulton/pluralsight-docker-ci:latest   wrk2                Running             Running 15 minutes ago                                
m2pokv4qcmp6        web-fe.3            nigelpoulton/pluralsight-docker-ci:latest   mgr2                Running             Running 18 minutes ago                                
a2j57rhgtdq0        web-fe.4            nigelpoulton/pluralsight-docker-ci:latest   mgr1                Running             Running 20 minutes ago                                
3uhnqqccgywa        web-fe.5            nigelpoulton/pluralsight-docker-ci:latest   wrk1                Running             Running 16 minutes ago                                
d9qxyhwi5h5c        web-fe.6            nigelpoulton/pluralsight-docker-ci:latest   wrk3                Running             Running about a minute ago                            
1ut5mrfw57cu        web-fe.7            nigelpoulton/pluralsight-docker-ci:latest   wrk3                Remove              Shutdown less than a second ago                       
5onxk17wm44b        web-fe.8            nigelpoulton/pluralsight-docker-ci:latest   wrk2                Remove              Shutdown less than a second ago                       
m8xd7zl4niur        web-fe.9            nigelpoulton/pluralsight-docker-ci:latest   mgr3                Remove              Shutdown less than a second ago                       
l5isb4gm7m70        web-fe.10           nigelpoulton/pluralsight-docker-ci:latest   mgr2                Remove              Shutdown less than a second ago                       
root@mgr1:~# docker service ps web-fe
ID                  NAME                IMAGE                                       NODE                DESIRED STATE       CURRENT STATE                ERROR               PORTS
k2n6z5dg8zv7        web-fe.2            nigelpoulton/pluralsight-docker-ci:latest   wrk2                Running             Running 16 minutes ago                           
m2pokv4qcmp6        web-fe.3            nigelpoulton/pluralsight-docker-ci:latest   mgr2                Running             Running 18 minutes ago                           
a2j57rhgtdq0        web-fe.4            nigelpoulton/pluralsight-docker-ci:latest   mgr1                Running             Running 20 minutes ago                           
3uhnqqccgywa        web-fe.5            nigelpoulton/pluralsight-docker-ci:latest   wrk1                Running             Running 16 minutes ago                           
d9qxyhwi5h5c        web-fe.6            nigelpoulton/pluralsight-docker-ci:latest   wrk3                Running             Running about a minute ago 

删除服务

root@mgr1:~# docker service rm web-fe
web-fe
root@mgr1:~# docker service ls
ID                  NAME                MODE                REPLICAS            IMAGE               PORTS

滚动升级

• 对部署的应用进行滚动升级
• 先创建一个新的覆盖网络给服务使用

root@mgr1:~# docker network create -d overlay uber-net
4dej9prz4p2ysiaazsxxf4j2a

• 覆盖网络是创建子啊底层异构网络之上的一个新的二层容器网络
• 查看创建的网络

root@mgr1:~# docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
982e20525c92        bridge              bridge              local
1369db4bb785        docker_gwbridge     bridge              local
2393ca24274a        host                host                local
2dguzptxi4uo        ingress             overlay             swarm
f5e31aa259c6        none                null                local
4dej9prz4p2y        uber-net            overlay             swarm

• 创建一个服务，将其接入uber-net网络

root@mgr1:~# docker service  create --name uber-svr \
> --network uber-net \
> -p 80:80 --replicas 12 \
> nigelpoulton/tu-demo:v1
lymtwway58lnow87btpz5at53

• 查看创建服务的状态

root@mgr2:~# docker service ls
ID                  NAME                MODE                REPLICAS            IMAGE                     PORTS
lymtwway58ln        uber-svr            replicated          0/12                nigelpoulton/tu-demo:v1   *:80->80/tcp
root@mgr2:~# docker service ps uber-svr
ID                  NAME                IMAGE                     NODE                DESIRED STATE       CURRENT STATE                  ERROR               PORTS
mc5ni9z3rbit        uber-svr.1          nigelpoulton/tu-demo:v1   wrk2                Running             Preparing about a minute ago                       
p6tqug5eafww        uber-svr.2          nigelpoulton/tu-demo:v1   wrk2                Running             Preparing about a minute ago                       
vu97ofssg4g4        uber-svr.3          nigelpoulton/tu-demo:v1   mgr1                Running             Preparing about a minute ago                       
j1vpg5f5rqk2        uber-svr.4          nigelpoulton/tu-demo:v1   mgr2                Running             Preparing about a minute ago                       
p7kve6rnrq4j        uber-svr.5          nigelpoulton/tu-demo:v1   wrk3                Running             Preparing about a minute ago                       
axri1z7iykbi        uber-svr.6          nigelpoulton/tu-demo:v1   wrk3                Running             Preparing about a minute ago                       
hj7q9sxfszq7        uber-svr.7          nigelpoulton/tu-demo:v1   mgr3                Running             Preparing about a minute ago                       
cbzi9k0c06k3        uber-svr.8          nigelpoulton/tu-demo:v1   mgr2                Running             Preparing about a minute ago                       
qei05mrhzsun        uber-svr.9          nigelpoulton/tu-demo:v1   wrk1                Running             Preparing about a minute ago                       
nhjvnvr2z9pb        uber-svr.10         nigelpoulton/tu-demo:v1   mgr3                Running             Preparing about a minute ago                       
1p6f9btgh566        uber-svr.11         nigelpoulton/tu-demo:v1   mgr1                Running             Preparing about a minute ago                       
ritvd57hm0eg        uber-svr.12         nigelpoulton/tu-demo:v1   wrk1                Running             Preparing about a minute ago

• 在游览器查看服务状态

14.png

• 升级服务——采用一种阶段性方式：每次更新两个服务，中间间隔20s

root@mgr1:~# docker service update \
> --image nigelpoulton/tu-demo:v2 \
> --update-parallelism 2 \
> --update-delay 20s uber-svr
uber-svr
overall progress: 12 out of 12 tasks 
1/12: running   [==================================================>] 
2/12: running   [==================================================>] 
3/12: running   [==================================================>] 
4/12: running   [==================================================>] 
5/12: running   [==================================================>] 
6/12: running   [==================================================>] 
7/12: running   [==================================================>] 
8/12: running   [==================================================>] 
9/12: running   [==================================================>] 
10/12: running   [==================================================>] 
11/12: running   [==================================================>] 
12/12: running   [==================================================>] 
verify: Service converged 

• 查看服务的升级过程

root@mgr2:~# docker service ps uber-svr
ID                  NAME                IMAGE                     NODE                DESIRED STATE       CURRENT STATE                 ERROR               PORTS
mc5ni9z3rbit        uber-svr.1          nigelpoulton/tu-demo:v1   wrk2                Running             Running 8 minutes ago                             
p6tqug5eafww        uber-svr.2          nigelpoulton/tu-demo:v1   wrk2                Running             Running 8 minutes ago                             
vu97ofssg4g4        uber-svr.3          nigelpoulton/tu-demo:v1   mgr1                Running             Running 7 minutes ago                             
j1vpg5f5rqk2        uber-svr.4          nigelpoulton/tu-demo:v1   mgr2                Running             Running 8 minutes ago                             
rn4locdc1k2z        uber-svr.5          nigelpoulton/tu-demo:v2   wrk3                Running             Running 11 seconds ago                            
p7kve6rnrq4j         \_ uber-svr.5      nigelpoulton/tu-demo:v1   wrk3                Shutdown            Shutdown 12 seconds ago                           
i257cl5ssjpm        uber-svr.6          nigelpoulton/tu-demo:v2   mgr1                Running             Running about a minute ago                        
axri1z7iykbi         \_ uber-svr.6      nigelpoulton/tu-demo:v1   wrk3                Shutdown            Shutdown about a minute ago                       
jltt3ehhns5h        uber-svr.7          nigelpoulton/tu-demo:v2   mgr3                Running             Running 45 seconds ago                            
hj7q9sxfszq7         \_ uber-svr.7      nigelpoulton/tu-demo:v1   mgr3                Shutdown            Shutdown 58 seconds ago                           
lhpt4mdqf9v9        uber-svr.8          nigelpoulton/tu-demo:v2   mgr2                Running             Running 57 seconds ago                            
cbzi9k0c06k3         \_ uber-svr.8      nigelpoulton/tu-demo:v1   mgr2                Shutdown            Shutdown 59 seconds ago                           
qei05mrhzsun        uber-svr.9          nigelpoulton/tu-demo:v1   wrk1                Running             Running 8 minutes ago                             
hzmc75i2s5mp        uber-svr.10         nigelpoulton/tu-demo:v2   mgr3                Running             Running 22 seconds ago                            
nhjvnvr2z9pb         \_ uber-svr.10     nigelpoulton/tu-demo:v1   mgr3                Shutdown            Shutdown 24 seconds ago                           
x82qsfdfpmsw        uber-svr.11         nigelpoulton/tu-demo:v2   wrk3                Running             Running about a minute ago                        
1p6f9btgh566         \_ uber-svr.11     nigelpoulton/tu-demo:v1   mgr1                Shutdown            Shutdown about a minute ago                       
q34d1v9nx1gs        uber-svr.12         nigelpoulton/tu-demo:v2   wrk1                Ready               Preparing 2 seconds ago                           
ritvd57hm0eg         \_ uber-svr.12     nigelpoulton/tu-demo:v1   wrk1                Shutdown            Running 2 seconds ago                             
root@mgr2:~# docker service ps uber-svr
ID                  NAME                IMAGE                     NODE                DESIRED STATE       CURRENT STATE                 ERROR               PORTS
n70dergpucz2        uber-svr.1          nigelpoulton/tu-demo:v2   wrk2                Running             Running about a minute ago                        
mc5ni9z3rbit         \_ uber-svr.1      nigelpoulton/tu-demo:v1   wrk2                Shutdown            Shutdown 2 minutes ago                            
q2kcpfpdbl3y        uber-svr.2          nigelpoulton/tu-demo:v2   wrk2                Running             Running about a minute ago                        
p6tqug5eafww         \_ uber-svr.2      nigelpoulton/tu-demo:v1   wrk2                Shutdown            Shutdown 2 minutes ago                            
mk1v6ue3fimk        uber-svr.3          nigelpoulton/tu-demo:v2   mgr1                Running             Running about a minute ago                        
vu97ofssg4g4         \_ uber-svr.3      nigelpoulton/tu-demo:v1   mgr1                Shutdown            Shutdown about a minute ago                       
7uiuz1h3im99        uber-svr.4          nigelpoulton/tu-demo:v2   mgr2                Running             Running 2 minutes ago                             
j1vpg5f5rqk2         \_ uber-svr.4      nigelpoulton/tu-demo:v1   mgr2                Shutdown            Shutdown 2 minutes ago                            
rn4locdc1k2z        uber-svr.5          nigelpoulton/tu-demo:v2   wrk3                Running             Running 3 minutes ago                             
p7kve6rnrq4j         \_ uber-svr.5      nigelpoulton/tu-demo:v1   wrk3                Shutdown            Shutdown 3 minutes ago                            
i257cl5ssjpm        uber-svr.6          nigelpoulton/tu-demo:v2   mgr1                Running             Running 4 minutes ago                             
axri1z7iykbi         \_ uber-svr.6      nigelpoulton/tu-demo:v1   wrk3                Shutdown            Shutdown 4 minutes ago                            
jltt3ehhns5h        uber-svr.7          nigelpoulton/tu-demo:v2   mgr3                Running             Running 3 minutes ago                             
hj7q9sxfszq7         \_ uber-svr.7      nigelpoulton/tu-demo:v1   mgr3                Shutdown            Shutdown 4 minutes ago                            
lhpt4mdqf9v9        uber-svr.8          nigelpoulton/tu-demo:v2   mgr2                Running             Running 4 minutes ago                             
cbzi9k0c06k3         \_ uber-svr.8      nigelpoulton/tu-demo:v1   mgr2                Shutdown            Shutdown 4 minutes ago                            
8amfntzhx1wl        uber-svr.9          nigelpoulton/tu-demo:v2   wrk1                Running             Running about a minute ago                        
qei05mrhzsun         \_ uber-svr.9      nigelpoulton/tu-demo:v1   wrk1                Shutdown            Shutdown about a minute ago                       
hzmc75i2s5mp        uber-svr.10         nigelpoulton/tu-demo:v2   mgr3                Running             Running 3 minutes ago                             
nhjvnvr2z9pb         \_ uber-svr.10     nigelpoulton/tu-demo:v1   mgr3                Shutdown            Shutdown 3 minutes ago                            
x82qsfdfpmsw        uber-svr.11         nigelpoulton/tu-demo:v2   wrk3                Running             Running 4 minutes ago                             
1p6f9btgh566         \_ uber-svr.11     nigelpoulton/tu-demo:v1   mgr1                Shutdown            Shutdown 4 minutes ago                            
q34d1v9nx1gs        uber-svr.12         nigelpoulton/tu-demo:v2   wrk1                Running             Running 2 minutes ago                             
ritvd57hm0eg         \_ uber-svr.12     nigelpoulton/tu-demo:v1   wrk1                Shutdown            Shutdown 2 minutes ago  

• 查看升级服务的详细信息

root@mgr1:~# docker service inspect --pretty uber-svr

ID:     lymtwway58lnow87btpz5at53
Name:       uber-svr
Service Mode:   Replicated
 Replicas:  12
UpdateStatus:
 State:     completed
 Started:   7 minutes ago
 Completed: 3 minutes ago
 Message:   update completed
Placement:
UpdateConfig:
 Parallelism:   2
 Delay:     20s
 On failure:    pause
 Monitoring Period: 5s
 Max failure ratio: 0
 Update order:      stop-first
RollbackConfig:
 Parallelism:   1
 On failure:    pause
 Monitoring Period: 5s
 Max failure ratio: 0
 Rollback order:    stop-first
ContainerSpec:
 Image:     nigelpoulton/tu-demo:v2@sha256:d3c0d8c9d5719d31b79cca146025fa7d1de4749fef58a7e038cf0ef2ba5eb74c
 Init:      false
Resources:
Networks: uber-net 
Endpoint Mode:  vip
Ports:
 PublishedPort = 80
  Protocol = tcp
  TargetPort = 80
  PublishMode = ingress 

故障排查

• docker节点默认的配置是，服务使用的是json-file日志驱动
• 其他驱动还有：journald、syslog、splunk和gelf
• 查看swarm服务日志

root@mgr1:~# docker service logs uber-svr
uber-svr.3.vu97ofssg4g4@mgr1     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.3.vu97ofssg4g4@mgr1     | 10.255.0.7 - - [05/Nov/2019 16:00:39] "GET /static/stylesheets/style.css HTTP/1.1" 200 -
uber-svr.11.1p6f9btgh566@mgr1    |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.11.1p6f9btgh566@mgr1    | 10.255.0.7 - - [05/Nov/2019 16:00:39] "GET / HTTP/1.1" 200 -
uber-svr.6.i257cl5ssjpm@mgr1     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.3.mk1v6ue3fimk@mgr1     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.6.axri1z7iykbi@wrk3     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.6.axri1z7iykbi@wrk3     | 10.255.0.7 - - [05/Nov/2019 16:02:39] "GET / HTTP/1.1" 200 -
uber-svr.5.p7kve6rnrq4j@wrk3     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.11.x82qsfdfpmsw@wrk3    |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.5.rn4locdc1k2z@wrk3     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.8.lhpt4mdqf9v9@mgr2     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.4.7uiuz1h3im99@mgr2     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.4.j1vpg5f5rqk2@mgr2     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.8.cbzi9k0c06k3@mgr2     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.7.jltt3ehhns5h@mgr3     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.10.hzmc75i2s5mp@mgr3    |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.1.n70dergpucz2@wrk2     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.2.q2kcpfpdbl3y@wrk2     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.7.hj7q9sxfszq7@mgr3     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.10.nhjvnvr2z9pb@mgr3    |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.12.q34d1v9nx1gs@wrk1    |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.9.8amfntzhx1wl@wrk1     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.12.ritvd57hm0eg@wrk1    |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.9.qei05mrhzsun@wrk1     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.2.p6tqug5eafww@wrk2     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.2.p6tqug5eafww@wrk2     | 10.255.0.7 - - [05/Nov/2019 16:02:55] "POST / HTTP/1.1" 200 -
uber-svr.1.mc5ni9z3rbit@wrk2     |  * Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
uber-svr.1.mc5ni9z3rbit@wrk2     | 10.255.0.7 - - [05/Nov/2019 16:00:41] "GET /favicon.ico HTTP/1.1" 404 -

• 查看日志的命令可以加参数 --follow进行跟踪、--tail显示最新日志、--details获取额外信息

docker Swarm——命令

• docker swarm init 创建一个新的swarm,执行这个命令的节点称为管理节点
• docker swarm join-token 查询接入管理节点和工作节点到现有swarm时所使用的命令和Token
• • 增加管理节点——docker swarm join-token manager
  • 增加工作节点——docker swarm join-token work

• docker node ls 列出swarm所有节点及相关信息
• docker service create 创建新服务
• docker service ls 列出swarm中运行的服务
• docker service ps <service> 获取更多关于服务服务的信息
• docker service inspect 获取服务的详细信息
• docker service scale 用于对服务副本数量进行增减
• docker service update 对运行中的服务进行属性变更
• docker service logs 查看服务的日志
• docker service rm 从swarm删除服务