帮助命令
docker version
显示Docker版本信息
[root@localhost ~]# docker version
Client: Docker Engine - Community
Version: 19.03.13
API version: 1.40
Go version: go1.13.15
Git commit: 4484c46d9d
Built: Wed Sep 16 17:03:45 2020
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 19.03.13
API version: 1.40 (minimum version 1.12)
Go version: go1.13.15
Git commit: 4484c46d9d
Built: Wed Sep 16 17:02:21 2020
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.3.7
GitCommit: 8fba4e9a7d01810a393d5d25a3621dc101981175
runc:
Version: 1.0.0-rc10
GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd
docker-init:
Version: 0.18.0
GitCommit: fec3683
[root@localhost ~]#
docker info
显示docker的系统信息，包括镜像和容器的数量。
[root@localhost ~]# docker info
Client:
Debug Mode: false
Server:
Containers: 1
Running: 0
Paused: 0
Stopped: 1
Images: 1
Server Version: 19.03.13
Storage Driver: overlay2
Backing Filesystem: xfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 8fba4e9a7d01810a393d5d25a3621dc101981175
runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd
init version: fec3683
Security Options:
seccomp
Profile: default
Kernel Version: 3.10.0-1127.19.1.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 1.777GiB
Name: localhost.localdomain
ID: 4ARA:NX4Y:7DM7:IGVR:XQNU:PNSQ:SDFN:44U2:VINY:2OMR:VDKO:2SKU
Docker Root Dir: /var/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Registry Mirrors:
https://gnxq79wc.mirror.aliyuncs.com/
Live Restore Enabled: false
[root@localhost ~]#
docker 命令 --help
帮助命令
命令：https://docs.docker.com/engine/reference/commandline/
镜像命令
docker images
查看所有本地主机上的镜像
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest bf756fb1ae65 10 months ago 13.3kB
#解释
REPOSITORY 镜像仓库源
TAG 镜像的标签
IMAGE ID 镜像的ID
CREATED 镜像的创建时间
SIZE 镜像的大小
Options选项
[root@localhost ~]# docker images --help
Usage: docker images [OPTIONS] [REPOSITORY[:TAG]]
List images
Options:
-a, --all Show all images (default hides intermediate images)
--digests Show digests #格式化
-f, --filter filter Filter output based on conditions provided #过滤
--format string Pretty-print images using a Go template
--no-trunc Don't truncate output
-q, --quiet Only show numeric IDs
解释
-a 列出所有镜像
-q 只显示镜像的ID
[root@localhost ~]# docker images -a
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest bf756fb1ae65 10 months ago 13.3kB
[root@localhost ~]# docker images -aq
bf756fb1ae65
[root@localhost ~]#
搜索命令
网页搜索
docker search
docker search --help
[root@localhost ~]# docker search --help
Usage: docker search [OPTIONS] TERM
Search the Docker Hub for images
Options:
-f, --filter filter Filter output based on conditions provided
--format string Pretty-print search using a Go template
--limit int Max number of search results (default 25)
--no-trunc Don't truncate output
[root@localhost ~]#
例如：
--filter=STARS=3000 #过滤出镜像收藏大于3000的
[root@localhost ~]# docker search mysql --filter=STARS=3000
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
mysql MySQL is a widely used, open-source relation… 10115 [OK]
mariadb MariaDB is a community-developed fork of MyS… 3715 [OK]
[root@localhost ~]#
下载命令
docker pull
[root@localhost ~]# docker pull --help
Usage: docker pull [OPTIONS] NAME[:TAG|@DIGEST]
Pull an image or a repository from a registry
Options:
-a, --all-tags Download all tagged images in the repository
--disable-content-trust Skip image verification (default true)
--platform string Set platform if server is multi-platform capable
-q, --quiet Suppress verbose output
[root@localhost ~]#
[root@localhost ~]# docker pull mysql
Using default tag: latest #如果不写tag:，默认下载最新的版本
latest: Pulling from library/mysql
bb79b6b2107f: Pull complete #分层下载，docker image的核心：联合文件系统
49e22f6fb9f7: Pull complete
842b1255668c: Pull complete
9f48d1f43000: Pull complete
c693f0615bce: Pull complete
8a621b9dbed2: Pull complete
0807d32aef13: Pull complete
a56aca0feb17: Pull complete
de9d45fd0f07: Pull complete
1d68a49161cc: Pull complete
d16d318b774e: Pull complete
49e112c55976: Pull complete
Digest: sha256:8c17271df53ee3b843d6e16d46cff13f22c9c04d6982eb15a9a47bd5c9ac7e2d #签名
Status: Downloaded newer image for mysql:latest
docker.io/library/mysql:latest #真实地址
[root@localhost ~]
docker pull mysql=docker pull docker.io/library/mysql:latest #等价
指定下载版本
docker pull 镜像名:tag
注：指定下载的版本必须是存在的。
联合文件系统，公用文件不在下载极大减少占用存储
比较：
[root@localhost ~]# docker pull mysql
Using default tag: latest
latest: Pulling from library/mysql
bb79b6b2107f: Pull complete
49e22f6fb9f7: Pull complete
842b1255668c: Pull complete
9f48d1f43000: Pull complete
c693f0615bce: Pull complete
8a621b9dbed2: Pull complete
0807d32aef13: Pull complete
a56aca0feb17: Pull complete
de9d45fd0f07: Pull complete
1d68a49161cc: Pull complete
d16d318b774e: Pull complete
49e112c55976: Pull complete
Digest: sha256:8c17271df53ee3b843d6e16d46cff13f22c9c04d6982eb15a9a47bd5c9ac7e2d
Status: Downloaded newer image for mysql:latest
docker.io/library/mysql:latest
[root@localhost ~]# docker pull mysql:5.7
5.7: Pulling from library/mysql
bb79b6b2107f: Already exists
49e22f6fb9f7: Already exists
842b1255668c: Already exists
9f48d1f43000: Already exists
c693f0615bce: Already exists
8a621b9dbed2: Already exists
0807d32aef13: Already exists
f15d42f48bd9: Pull complete
098ceecc0c8d: Pull complete
b6fead9737bc: Pull complete
351d223d3d76: Pull complete
Digest: sha256:4d2b34e99c14edb99cdd95ddad4d9aa7ea3f2c4405ff0c3509a29dc40bcb10ef
Status: Downloaded newer image for mysql:5.7
docker.io/library/mysql:5.7
[root@localhost ~]#
查看下载的镜像
删除镜像命令
docker rmi -f id
docker rmi -f id1 id2 id3 #删除多个指定的容器镜像
通过ID删除镜像/通过TAG删除镜像
再次查看，mysql 5.7已被删除，只删除了部分层。