Ubuntu16.04Docker查看和删除镜像

什么是Docker的镜像

容器的基石层叠的只读文件系统联合加载 graph LR bootfs-->rootfs rootfs-->add-emacs add-emacs-->add-apache

Docker镜像存储的位置

Root Dir: /var/lib/docker/aufs

eggyer@ubuntu:/usr/local$ docker info Containers: 11 Images: 6 Server Version: 1.9.1 Storage Driver: aufs Root Dir: /var/lib/docker/aufs Backing Filesystem: extfs Dirs: 28 Dirperm1 Supported: true Execution Driver: native-0.2 Logging Driver: json-file Kernel Version: 4.4.0-47-generic Operating System: Ubuntu 16.04.1 LTS (containerized) CPUs: 4 Total Memory: 3.842 GiB Name: ubuntu ID: WBMI:TD6B:PRUN:XWSX:5RVV:QUYO:5S27:W74L:MQ3W:YDB7:JXPL:NR5X WARNING: No swap limit support eggyer@ubuntu:/usr/local$ sudo ls -l /var/lib/docker/aufs drwxr-xr-x 30 root root 4096 11月 25 12:41 diff drwxr-xr-x 2 root root 4096 11月 25 12:41 layers drwxr-xr-x 30 root root 4096 11月 25 12:41 mnt 查看mnt中的文件 eggyer@ubuntu:/usr/local$ sudo ls -l /var/lib/docker/aufs/mnt 总用量 112 drwxr-xr-x 2 root root 4096 11月 25 10:47 0409e42a2dd26d643bc9d3b7e0cc6642cd4d690f5431d3633ca5ba14126ad633 drwxr-xr-x 2 root root 4096 11月 25 10:47 0409e42a2dd26d643bc9d3b7e0cc6642cd4d690f5431d3633ca5ba14126ad633-init drwxr-xr-x 2 root root 4096 11月 25 02:36 0d2ba69dbe3ebda7e9473d1db0f49e98115888586f10761709c02d8cca1d702f drwxr-xr-x 2 root root 4096 11月 25 11:58 142b9f902b69f1f05f971977018266074587ed11ac953f92a2aaf467d3ad140f drwxr-xr-x 2 root root 4096 11月 25 11:58 142b9f902b69f1f05f971977018266074587ed11ac953f92a2aaf467d3ad140f-init drwxr-xr-x 2 root root 4096 11月 25 10:38 29a7330714d833270e0c6e0a580e9374974c47db8e54324ee62a9f15c69da103 drwxr-xr-x 2 root root 4096 11月 25 10:38 29a7330714d833270e0c6e0a580e9374974c47db8e54324ee62a9f15c69da103-init drwxr-xr-x 2 root root 4096 11月 25 02:36 2f5519d4ff74257f28f7c2099c09998fc75193ac8df22543d3d2263934da0992 drwxr-xr-x 2 root root 4096 11月 25 12:18 327d5a30f1868441afa84ef2d662231e81208de400ddcf7627d3d716a5544b23 drwxr-xr-x 2 root root 4096 11月 25 12:18 327d5a30f1868441afa84ef2d662231e81208de400ddcf7627d3d716a5544b23-init drwxr-xr-x 2 root root 4096 11月 25 12:41 3b1e8b137e4ef0419086d79fd1018c20e9c4d7269c74fb235d882f2484677e51 drwxr-xr-x 2 root root 4096 11月 25 12:41 3b1e8b137e4ef0419086d79fd1018c20e9c4d7269c74fb235d882f2484677e51-init drwxr-xr-x 2 root root 4096 11月 25 02:36 594949f005feb4a4c43f5e6773bc34eae7befa8bfdee4242a5e28c0b0edbb1a4 drwxr-xr-x 2 root root 4096 11月 25 02:36 67de889be9457b9b22e6faf87d2faa45e823236486c75f86c2b1f7e436b262b5 drwxr-xr-x 2 root root 4096 11月 25 02:36 6d75c02d3deeb73247665df9dbd74b60018676d7fa3a360c41e027420be19161 drwxr-xr-x 2 root root 4096 11月 25 02:36 6d75c02d3deeb73247665df9dbd74b60018676d7fa3a360c41e027420be19161-init drwxr-xr-x 2 root root 4096 11月 25 12:00 6fa6e815583eb3ccd9758c0238b5213d9d532d5e34b85f5f181103d679871fb1 drwxr-xr-x 2 root root 4096 11月 25 12:00 6fa6e815583eb3ccd9758c0238b5213d9d532d5e34b85f5f181103d679871fb1-init drwxr-xr-x 2 root root 4096 11月 25 11:45 ba87d27bc76b4f146884c4805af21c25a7bbbdd87229503f7e186fb0ccd63c2e drwxr-xr-x 2 root root 4096 11月 25 11:45 ba87d27bc76b4f146884c4805af21c25a7bbbdd87229503f7e186fb0ccd63c2e-init drwxr-xr-x 2 root root 4096 11月 25 02:36 bea8f41ae3e812e19e2b011bb78a268f386e2089320d1c48caf7dca3df39b15f drwxr-xr-x 2 root root 4096 11月 25 02:41 c6128de0b863d00cb8af724d9b222c3aa080929e4328391e499dd49aae5adf1e drwxr-xr-x 2 root root 4096 11月 25 02:41 c6128de0b863d00cb8af724d9b222c3aa080929e4328391e499dd49aae5adf1e-init drwxr-xr-x 2 root root 4096 11月 25 12:19 ed4d220ff1641c25f2a09d98ca782b0b2fce83757afe9f425720f8bee88ae363 drwxr-xr-x 2 root root 4096 11月 25 12:19 ed4d220ff1641c25f2a09d98ca782b0b2fce83757afe9f425720f8bee88ae363-init drwxr-xr-x 2 root root 4096 11月 25 02:36 ed6ff6865688f1f4e131482c7bbe7ada713271be7948902ebcb86dec27c4ff1c drwxr-xr-x 2 root root 4096 11月 25 10:34 f6bf839a4bd5c60b68a9671ec8cd21102b703f2c48731f2b5875ff89f4bff148 drwxr-xr-x 2 root root 4096 11月 25 10:34 f6bf839a4bd5c60b68a9671ec8cd21102b703f2c48731f2b5875ff89f4bff148-init

列出镜像

docker images [OPTIONS][repsitory] -a --all=false -f --filter=[] --no-trunc=false (不使用截断的形式 ID) -q --quiet=false (只显示镜像的唯一ID) eggyer@ubuntu:/usr/local$ docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE ubuntu latest bea8f41ae3e8 9 days ago 128.1 MB

REPOSITORY

一个镜像关联了一个REPOSITORY,一个REPOSITORY关联了一系列镜像 比如ubuntu就是一个仓库,其下边不同的镜像表示ubuntu不同的版本. 和之前讲到的REGISTRY仓库不同,REGISTRY是DOCKER的一系列组件,其包含了很多REPOSITORY

TAG

镜像的标签,不同的镜像以标签的形式区分; 同一个镜像可以使用不同的标签; docker run ubuntu命令默认使用latest标签的ubuntu镜像.

使用notrunc查看完成的ID

eggyer@ubuntu:/usr/local$ docker images --no-trunc REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE ubuntu latest bea8f41ae3e812e19e2b011bb78a268f386e2089320d1c48caf7dca3df39b15f 9 days ago 128.1 MB

只显示镜像名ID

eggyer@ubuntu:/usr/local$ docker images -q bea8f41ae3e8

根据repository查看镜像

eggyer@ubuntu:/usr/local$ docker images ubuntu REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE ubuntu latest bea8f41ae3e8 9 days ago 128.1 MB

查看镜像的详细信息

docker inspect [options] CONTAINER|IMAGE[CONTAINER|image] -f --format="" eggyer@ubuntu:/usr/local$ docker inspect ubuntu:latest [ { "Id": "bea8f41ae3e812e19e2b011bb78a268f386e2089320d1c48caf7dca3df39b15f", "RepoTags": [ "ubuntu:latest" ], "RepoDigests": [], "Parent": "0d2ba69dbe3ebda7e9473d1db0f49e98115888586f10761709c02d8cca1d702f", "Comment": "", "Created": "2016-11-16T20:58:26.830045089Z", "Container": "c450b5337e9f0b1e408f45d76031d56219542c7ebe416c6d872694abcb7e5a33", "ContainerConfig": { "Hostname": "fb8ca5e4ccd2", "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\"]" ], "Image": "sha256:53ba9532a0d83bd4db49e5dbb11a2db0b5e9004669a030143a2c0a3f251bf900", "Volumes": null, "WorkingDir": "", "Entrypoint": null, "OnBuild": null, "Labels": {} }, "DockerVersion": "1.12.3", "Author": "", "Config": { "Hostname": "fb8ca5e4ccd2", "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" ], "Image": "sha256:53ba9532a0d83bd4db49e5dbb11a2db0b5e9004669a030143a2c0a3f251bf900", "Volumes": null, "WorkingDir": "", "Entrypoint": null, "OnBuild": null, "Labels": {} }, "Architecture": "amd64", "Os": "linux", "Size": 0, "VirtualSize": 128115414, "GraphDriver": { "Name": "aufs", "Data": null } } ]

删除docker镜像

docker rmi [OPTIONS] IMAGE [IMAGE...] -f --force=false 强制删除镜像 --no-prune=false 保留镜像中被打标签的父镜像 删除时若使用IMAGE名和TAG名的形式则每次会删除一个,如果一个镜像有多个TAG那么只有当最后一个IMAGE +TAG被删除时镜像菜会被删除 若使用IMAGEID可以删除其对应的多个IMAGE+TAG