1：查看镜像列表
docker image ls
2：拉取镜像
通过命令可以从镜像仓库中拉取镜像，默认从Docker Hub 获取。
命令格式：
docker image pull <repository>:<tag>
拉取ubuntu仓库,标签为 latest 的镜像，如果省略标签，则docker 会拉取标签为latest的镜像。获取非官方镜像的命令类似，例如：
docker image pull microsoft/dotnet:latest
docker image pull -a nigelpoulton/tu-demo //添加 -a 参数可以拉取仓库中所有镜像
3：docker image ls 详解
docker image ls --filter [dangling|before|since|lable|reference]
dangling: 值为true或false,true 仅返回悬虚镜像，false仅返回非悬虚镜像。悬虚镜像：指没有标签的镜像。
before：需要镜像名或镜像ID作为参数，返回之前创建的全部镜像。
since:需要镜像名或镜像ID作为参数，返回之后创建的全部镜像。
lable:根据标注的名称或值过滤。略
reference:根据repository和tag搜索，貌似*只能搜一级空间的镜像
4：搜索镜像
docker search ubuntu
按照官方或非官方过滤，使用 --filter "is-official=true|false"
docker search ubuntu --filter "is-official=true" //只显示官方镜像
显示是否为自动创建的镜像
docker search ubuntu --filter "is-automated=true" //只自动创建的仓库
5：查看镜像分层
输入命令：docker image inspect ubuntu:latest
输出：
[
{
"Id": "sha256:3556258649b2ef23a41812be17377d32f568ed9f45150a26466d2ea26d926c32",
"RepoTags": [
"ubuntu:latest"
],
"RepoDigests": [
"ubuntu@sha256:c303f19cfe9ee92badbbbd7567bc1ca47789f79303ddcef56f77687d4744cd7a"
],
"Parent": "",
"Comment": "",
"Created": "2019-07-23T15:21:13.01464074Z",
"Container": "3b0e1c94bfe8f2670577cad66142287be14f02c7e49e9d1710073f6b8733bb48",
"ContainerConfig": {
"Hostname": "3b0e1c94bfe8",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/sh",
"-c",
"#(nop) ",
"CMD [\"/bin/bash\"]"
],
"ArgsEscaped": true,
"Image": "sha256:6dd4850db8211ac5177f2729ad131f65d6472e95248c92b7fb95acfc609794e7",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {}
},
"DockerVersion": "18.06.1-ce",
"Author": "",
"Config": {
"Hostname": "",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/bash"
],
"ArgsEscaped": true,
"Image": "sha256:6dd4850db8211ac5177f2729ad131f65d6472e95248c92b7fb95acfc609794e7",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": null
},
"Architecture": "amd64",
"Os": "linux",
"Size": 64185514,
"VirtualSize": 64185514,
"GraphDriver": {
"Data": {
"LowerDir": "/mnt/sda1/var/lib/docker/overlay2/a6003e3ac734728a7ac69eb19453892ad619d1d23f246730c1c59e542f1277c6/diff:/mnt/sda1/var/lib/docker/overlay2/25fc962c359839b2565d1208e2558fa0afd676529ee4b18c87e9346466159feb/diff:/mnt/sda1/var/lib/docker/overlay2/5cc4ecda8dabb8415a0e316a09326a04414e5aefe7a5ee885f6af52838ddce91/diff",
"MergedDir": "/mnt/sda1/var/lib/docker/overlay2/70dbca5fd3a27da47ff110d91b1b146a905b8e741871db773bfb6a5dc65299e3/merged",
"UpperDir": "/mnt/sda1/var/lib/docker/overlay2/70dbca5fd3a27da47ff110d91b1b146a905b8e741871db773bfb6a5dc65299e3/diff",
"WorkDir": "/mnt/sda1/var/lib/docker/overlay2/70dbca5fd3a27da47ff110d91b1b146a905b8e741871db773bfb6a5dc65299e3/work"
},
"Name": "overlay2"
},
"RootFS": {
"Type": "layers",
"Layers": [
"sha256:543791078bdb84740cb5457abbea10d96dac3dea8c07d6dc173f734c20c144fe",
"sha256:c56e09e1bd18e5e41afb1fd16f5a211f533277bdae6d5d8ae96a248214d66baf",
"sha256:a31dbd3063d77def5b2562dc8e14ed3f578f1f90a89670ae620fd62ae7cd6ee7",
"sha256:b079b3fa8d1b4b30a71a6e81763ed3da1327abaf0680ed3ed9f00ad1d5de5e7c"
]
},
"Metadata": {
"LastTagTime": "0001-01-01T00:00:00Z"
}
}
]
在json节点RootFS可以看出ubuntu镜像有四层
6：删除镜像
7、 查阅当前注册的镜像源列表
docker info
System Time: 2020-03-08T06:34:55.3685974Z
EventsListeners: 1
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Registry Mirrors:
https://registry.docker-cn.com/
https://reg-mirror.qiniu.com/
Live Restore Enabled: false
Product License: Community Engine