2.docker client

docker client

Docker Run

从镜像创建、执行一个容器

# docker run 
docker run hello-world

执行docker run的时候,docker会先去寻找image文件,然后执行run指令

Override默认指令

# docker run  

docker run busybox echo hello
docker run busybox echo bye

查看busybox的文件系统快照

docker run busybox ls
# bin
# dev
# etc
# ...

busybox拥有相对完整的linux环境

docker run hello-world ls
docker run hello-world echo hello

hello-world没有额外的指令
![外链图片转存失败,源站可

docker ps

列出当前运行中的docker, 等价于docker container ls

docker ps

docker run busybox echo hello

docker ps

docker run busybox ping aws.com

在另一个窗口中

docker ps
# CONTAINER ID   IMAGE     COMMAND          CREATED          STATUS          PORTS     NAMES
# a4cd7f84a33f   busybox   "ping aws.com"   16 seconds ago   Up 14 seconds             sleepy_robinson

列出所有docker

docker ps --all

docker ps -a

生命周期 lifecycle

列出了已经结束的docker

docker ps --all

docker进程在何时结束?这就要说到docker的生命周期

# docker run = docker create + docker start

docker create hello-world
# container id

docker start -a ${container id}

-a 代表attach,将docker的输出打印到控制台

重启已经结束的docker

docker run busybox echo hello

docker ps -a

docker start -a ${container id}

第2步的docker start又执行了一次。

在此过程中,不能覆盖指令

docker ps -a

并无额外的docker创建

清除所有docker

docker system prune

获取docker的日志

docker create hello-world
# container id
docker start ${container id}
# container id
docker logs ${container id} / ${container}

终止docker

docker create busybox ping aws.com

docker start ${container id}

docker logs ${container id}

docker ps

终止docker

docker stop <container id>

docker kill <container id>

stop指令发送SIGTERM

kill指令发送SIGKILL

SIGTERM允许优雅退出,但是会有10s的timeout,10s之后docker会重新发送SIGKILL

docker ps

docker stop ${container id}

# after 10s...
docker ps -a

docker start ${container id} 

docker kill ${container id}

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