docker的命令的结构
docker command一般是分节呈现的，其结构是“docker 对象类型 command params”
比如，我们可以用“docker image ls”来列出当前机器上的image信息。
docker的对象类型
以下是docker中经常用到的对象类型：
image
container
volume
network
docker不同对象类型的通用命令
不同类型的对象类型可能会有不同的command， 但是以下这些command是通用的：
ls：列出所有此类对象
rm：删除某个此类对象
inspect：查看对象的详情
help：打印帮助信息
无对象类型的命令
但是也有一些命令不需要指定对象类型，有不少此类命令是对象类型命令的简化版本。
比如，
"docker ps" 是 "docker container ls" 的简化版。
"docker rm xxx" 是 "docker container rm xxx" 的简化版。
"docker irm xxx" 是 "docker image rm xxx" 的简化版。
"docker run xxx" 是 "docker container run xxx" 的简化版。
"docker exec xxx" 是 "docker container exec xxx" 的简化版。
"docker start xxx" 是 "docker container start xxx" 的简化版。
"docker stop xxx" 是 "docker container stop xxx" 的简化版。
docker的help系统
docker 命令和参数很多，我们不可能一一记住，因此docker为我们准备了不同级别的帮助系统。
比如，
最高级的help
“docker help”会打印出所有docker支持的命令和参数。
[me@localhost ~]$ docker help
Usage: docker [OPTIONS] COMMAND
A self-sufficient runtime for containers
Options:
--config string Location of client config files (default "/home/yuke/.docker")
-c, --context string Name of the context to use to connect to the daemon (overrides DOCKER_HOST env var and default
context set with "docker context use")
-D, --debug Enable debug mode
-H, --host list Daemon socket(s) to connect to
-l, --log-level string Set the logging level ("debug"|"info"|"warn"|"error"|"fatal") (default "info")
--tls Use TLS; implied by --tlsverify
--tlscacert string Trust certs signed only by this CA (default "/home/yuke/.docker/ca.pem")
--tlscert string Path to TLS certificate file (default "/home/yuke/.docker/cert.pem")
--tlskey string Path to TLS key file (default "/home/yuke/.docker/key.pem")
--tlsverify Use TLS and verify the remote
-v, --version Print version information and quit
Management Commands:
builder Manage builds
config Manage Docker configs
container Manage containers
context Manage contexts
engine Manage the docker engine
image Manage images
network Manage networks
node Manage Swarm nodes
plugin Manage plugins
secret Manage Docker secrets
service Manage services
stack Manage Docker stacks
swarm Manage Swarm
system Manage Docker
trust Manage trust on Docker images
volume Manage volumes
Commands:
attach Attach local standard input, output, and error streams to a running container
build Build an image from a Dockerfile
commit Create a new image from a container's changes
cp Copy files/folders between a container and the local filesystem
create Create a new container
diff Inspect changes to files or directories on a container's filesystem
events Get real time events from the server
exec Run a command in a running container
export Export a container's filesystem as a tar archive
history Show the history of an image
images List images
import Import the contents from a tarball to create a filesystem image
info Display system-wide information
inspect Return low-level information on Docker objects
kill Kill one or more running containers
load Load an image from a tar archive or STDIN
login Log in to a Docker registry
logout Log out from a Docker registry
logs Fetch the logs of a container
pause Pause all processes within one or more containers
port List port mappings or a specific mapping for the container
ps List containers
pull Pull an image or a repository from a registry
push Push an image or a repository to a registry
rename Rename a container
restart Restart one or more containers
rm Remove one or more containers
rmi Remove one or more images
run Run a command in a new container
save Save one or more images to a tar archive (streamed to STDOUT by default)
search Search the Docker Hub for images
start Start one or more stopped containers
stats Display a live stream of container(s) resource usage statistics
stop Stop one or more running containers
tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
top Display the running processes of a container
unpause Unpause all processes within one or more containers
update Update configuration of one or more containers
version Show the Docker version information
wait Block until one or more containers stop, then print their exit codes
对象类型级的help
“docker image help”会打印出所有image对象类型支持的命令和参数。
[me@localhost ~]$ docker image help
Usage: docker image COMMAND
Manage images
Commands:
build Build an image from a Dockerfile
history Show the history of an image
import Import the contents from a tarball to create a filesystem image
inspect Display detailed information on one or more images
load Load an image from a tar archive or STDIN
ls List images
prune Remove unused images
pull Pull an image or a repository from a registry
push Push an image or a repository to a registry
rm Remove one or more images
save Save one or more images to a tar archive (streamed to STDOUT by default)
tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
命令级的help
“docker image history -h”会打印出所有image对象类型history命令所支持的参数。
[me@localhost ~]$ docker image history -h
Flag shorthand -h has been deprecated, please use --help
Usage: docker image history [OPTIONS] IMAGE
Show the history of an image
Options:
--format string Pretty-print images using a Go template
-H, --human Print sizes and dates in human readable format (default true)
--no-trunc Don't truncate output
-q, --quiet Only show numeric IDs