1：查看鏡像列表
2：拉取鏡像
通過命令可以從鏡像倉庫中拉取鏡像，默認從Docker Hub 獲取。
命令格式：
docker image pull <repository>:<tag>
拉取ubuntu倉庫,標簽為 latest 的鏡像，如果省略標簽，則docker 會拉取標簽為latest的鏡像。獲取非官方鏡像的命令類似，例如：
docker image pull microsoft/dotnet:latest
docker image pull -a nigelpoulton/tu-demo //添加 -a 參數可以拉取倉庫中所有鏡像
3：docker image ls 詳解
docker image ls --filter [dangling|before|since|lable|reference]
dangling: 值為true或false,true 僅返回懸虛鏡像，false僅返回非懸虛鏡像。懸虛鏡像：指沒有標簽的鏡像。
before：需要鏡像名或鏡像ID作為參數，返回之前創建的全部鏡像。
since:需要鏡像名或鏡像ID作為參數，返回之后創建的全部鏡像。
lable:根據標注的名稱或值過濾。略
reference:根據repository和tag搜索，貌似*只能搜一級空間的鏡像
4：搜索鏡像
按照官方或非官方過濾，使用 --filter "is-official=true|false"
docker search ubuntu --filter "is-official=true" //只顯示官方鏡像
顯示是否為自動創建的鏡像
docker search ubuntu --filter "is-automated=true" //只自動創建的倉庫
5：查看鏡像分層
輸入命令：docker image inspect ubuntu:latest
輸出：
[
{
"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節點RootFS可以看出ubuntu鏡像有四層
6：刪除鏡像
參考書目《深入淺出Docker》
下一篇 ：使用Docker之容器的創建、刪除