17、Docker - 实战：帮助命令
1、docker version命令
命令：docker version，作用是显示显示Docker的版本信息。
# 显示docker的版本信息
[root@192 docker]# docker version
Client: Docker Engine - Community
Version: 20.10.5
API version: 1.41
Go version: go1.13.15
Git commit: 55c4c88
Built: Tue Mar 2 20:33:55 2021
OS/Arch: linux/amd64
Context: default
Experimental: true
Server: Docker Engine - Community
Engine:
Version: 20.10.5
API version: 1.41 (minimum version 1.12)
Go version: go1.13.15
Git commit: 363e9a8
Built: Tue Mar 2 20:32:17 2021
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.4.4
GitCommit: 05f951a3781f4f2c1911b05e61c160e9c30eaa8e
runc:
Version: 1.0.0-rc93
GitCommit: 12644e614e25b05da6fd08a38ffa0cfe1903fdec
docker-init:
Version: 0.19.0
GitCommit: de40ad0
2、docker info命令
命令：docker info，作用是显示Docker的系统信息，比docker version显示的信息更加详细，包括镜像和容器的数量。
[root@192 docker]# docker info
Client: docker客户端信息
Context: default
Debug Mode: false
Plugins: 插件信息
app: Docker App (Docker Inc., v0.9.1-beta3)
buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)
Server: docker服务器端信息
Containers: 1 容器数量
Running: 0 正在运行的容器数量
Paused: 0 暂停的容器数量
Stopped: 1 已停止的容器数量
Images: 1 镜像数量
Server Version: 20.10.5 docker服务器版本
Storage Driver: overlay2 docker存储驱动程序
Backing Filesystem: xfs 文件系统
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file 日志驱动程序
Cgroup Driver: cgroupfs Cgroup驱动程序
Cgroup Version: 1 Cgroup驱动版本
Plugins: 插件信息
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive Swarm状态
Runtimes: runc io.containerd.runc.v2 io.containerd.runtime.v1.linux runtimes信息
Default Runtime: runc 默认runtime
Init Binary: docker-init
containerd version: 05f951a3781f4f2c1911b05e61c160e9c30eaa8e
runc version: 12644e614e25b05da6fd08a38ffa0cfe1903fdec
init version: de40ad0
Security Options: 安全选项
seccomp
Profile: default
Kernel Version: 3.10.0-1127.el7.x86_64 linux内核版本
Operating System: CentOS Linux 7 (Core) linux操作系统
OSType: linux 操作系统类型
Architecture: x86_64
CPUs: 1 宿主机CPU数量
Total Memory: 972.3MiB 宿主机内存
Name: 192.168.134.129 宿主机名称
ID: 3FXQ:IECC:SYGU:OZEZ:JFUM:2N57:WS2M:FUJW:CJAE:ILZT:2NDL:UAAB
Docker Root Dir: /var/lib/docker docker根目录
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Registry Mirrors: 镜像仓库
https://y29l3pxp.mirror.aliyuncs.com/
Live Restore Enabled: false
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
3、docker --help命令（重点）
Docker的帮助命令：
可以执行docker --help，查看Docker的全部命令。
也可以执行docker 命令 --help，查看具体命令的使用说明。
示例如下：
[root@192 docker]# docker --help
Usage: docker [OPTIONS] COMMAND docker命令的使用方式 ,[]表示可以省略
A self-sufficient runtime for containers
Options: 选项
--config string Location of client config files (default "/root/.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 "/root/.docker/ca.pem")
--tlscert string Path to TLS certificate file (default "/root/.docker/cert.pem")
--tlskey string Path to TLS key file (default "/root/.docker/key.pem")
--tlsverify Use TLS and verify the remote
-v, --version Print version information and quit
Management Commands: docker管理类命令
app* Docker App (Docker Inc., v0.9.1-beta3)
builder Manage builds
buildx* Build with BuildKit (Docker Inc., v0.5.1-docker)
config Manage Docker configs
container Manage containers
context Manage contexts
image Manage images
manifest Manage Docker image manifests and manifest lists
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: docker命令
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
Run 'docker COMMAND --help' for more information on a command.
我们也可以在Docker的官方文档中，来查看Docker所有命令的使用方法。
在页面中点击Reference(参考)。
然后在左侧栏中Command-line reference —> Docker CLI (docker)，即可查看Docker的所有命令。
