Docker 1.12新功能探索（5）：创建服务

通过docker service create创建服务，使用docker service ls确认服务信息，docker service ps确认详细运行状况，更是在create的时候提供了众多的Option，这些Option在其他流行的编排工具中稍作比较，大多大同小异，使用方便。

淼叔

9388人浏览 · 2016-08-14 12:09:28

淼叔 · 2016-08-14 12:09:28 发布

这里写图片描述

通过docker service create创建服务，使用docker service ls确认服务信息，docker service ps确认详细运行状况，更是在create的时候提供了众多的Option，这些Option在其他流行的编排工具中稍作比较，大多大同小异，使用方便。

docker service create

Usage: docker service create [OPTIONS] IMAGE [COMMAND] [ARG…]

Options

short	option usage	explain	default setting
	–constraint value	Placement constraints	(default [])
	–container-label value	Container labels	(default [])
	–endpoint-mode string	Endpoint mode (vip or dnsrr)
-e	–env value	Set environment variables	(default [])
	–help	Print usage
-l	–label value	Service labels	(default [])
	–limit-cpu value	Limit CPUs	(default 0.000)
	–limit-memory value	Limit Memory	(default 0 B)
	–log-driver string	Logging driver for service
	–log-opt value	Logging driver options	(default [])
	–mode string	Service mode (replicated or global)	(default “replicated”)
	–mount value	Attach a mount to the service
	–name string	Service name
	–network value	Network attachments (default [])
-p	–publish value	Publish a port as a node port	(default [])
	–replicas value	Number of tasks	(default none)
	–reserve-cpu value	Reserve CPUs	(default 0.000)
	–reserve-memory value	Reserve Memory	(default 0 B)
	–restart-condition string	Restart when condition is met (none, on-failure, or any)
	–restart-delay value	Delay between restart attempts	(default none)
	–restart-max-attempts value	Maximum number of restarts before giving up	(default none)
	–restart-window value	Window used to evaluate the restart policy	(default none)
	–stop-grace-period value	Time to wait before force killing a container	(default none)
	–update-delay duration	Delay between updates
	–update-failure-action string	Action on update failure (pause	continue)
	–update-parallelism uint	Maximum number of tasks updated simultaneously (0 to update all at once)	(default 1)
-u	–user string	Username or UID
	–with-registry-auth	Send registry authentication details to swarm agents
-w	–workdir string	Working directory inside the container

事前确认

事前确认：没有运行中的service

[root@host31 ~]# docker service ls
ID  NAME  REPLICAS  IMAGE  COMMAND
[root@host31 ~]#

创建Service

创建一个sonarqube的service，创建4个副本，公开port 9000以用于外部访问

[root@host31 ~]# docker service create --name sonar_service --replicas 4 -p 9000:9000/tcp sonarqube
48rkq87ktq38q6v0sjr9cu3of
[root@host31 ~]#

确认结果

确认生成了4个副本的sonar_service都已经正常启动

[root@host31 ~]# docker service ls
ID            NAME           REPLICAS  IMAGE      COMMAND
48rkq87ktq38  sonar_service  4/4       sonarqube
[root@host31 ~]#

确认启动的4个副本以怎样的分布启动在哪个node上

[root@host31 ~]# docker service ps sonar_service
ID                         NAME             IMAGE      NODE    DESIRED STATE  CURRENT STATE                   ERROR
c0vp4yrr751j1nrblkpw9wek5  sonar_service.1  sonarqube  host33  Running        Running less than a second ago
aypn2tn8lj2k1xzttnc3k84at  sonar_service.2  sonarqube  host34  Running        Running less than a second ago
04seclvx14qrvfemol21y05px  sonar_service.3  sonarqube  host34  Running        Running less than a second ago
9y6x1uvj289f1flx08nl0mkws  sonar_service.4  sonarqube  host31  Running        Running 3 minutes ago
[root@host31 ~]#