docker 實踐(二）映象
阿新 • • 發佈：2018-12-14
一、獲取映象
1.1.從倉庫(Docker hub)獲取一個映象
# docker pull busybox Using default tag: latest #預設標籤為最新 latest: Pulling from library/busybox #映象來源 90e01955edcd: Pull complete #pull 進度 Digest: sha256:2a03a6059f21e150ae84b0973863609494aad70f0a80eaeb64bddd8d92465812 #簽名 Status: Downloaded newer image for busybox:latest #pull 狀態
1.2.檢視本地映象
# docker images REPOSITORY TAG IMAGE ID CREATED SIZE busybox latest 59788edf1f3e 2 months ago 1.15MB
REPOSITORY：倉庫
TAG：映象標籤
IMAGE ID：映象唯一ID
CREATED：建立時間
SIZE：映象大小
二、映象管理
2.1.下載nginx映象
# docker pull nginx
2.1.2.檢視當前映象
# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx latest 568c4670fa80 2 weeks ago 109MB busybox latest 59788edf1f3e 2 months ago 1.15MB
2.2.為靜態打標籤
2.2.1.為nginx映象打一個tag
# docker tag nginx:latest nginx:1.2
注意：給映象打tag的時候不要只打"latest"
檢視本地映象：
# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx 1.2 568c4670fa80 2 weeks ago 109MB nginx latest 568c4670fa80 2 weeks ago 109MB busybox latest 59788edf1f3e 2 months ago 1.15MB
2.3.檢視映象詳細資訊
# docker inspect 568c4670fa80
[
{
"Id": "sha256:568c4670fa800978e08e4a51132b995a54f8d5ae83ca133ef5546d092b864acf",
"RepoTags": [
"nginx:1.2",
"nginx:latest"
],
"RepoDigests": [
"[email protected]:5d32f60db294b5deb55d078cd4feb410ad88e6fe77500c87d3970eca97f54dba"
],
"Parent": "",
"Comment": "",
"Created": "2018-11-27T22:21:45.207738888Z",
"Container": "1455cab9c97f6945336dd97d5dfca0429eacbb739fcd362cc528ed8a175fcc7b",
"ContainerConfig": {
"Hostname": "1455cab9c97f",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"80/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"NGINX_VERSION=1.15.7-1~stretch",
"NJS_VERSION=1.15.7.0.2.6-1~stretch"
],
"Cmd": [
"/bin/sh",
"-c",
"#(nop) ",
"CMD [\"nginx\" \"-g\" \"daemon off;\"]"
],
"ArgsEscaped": true,
"Image": "sha256:cf9409661039371fa3448619fb988625e4542108921c4c8f923c5bccc51601eb",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": [],
"Labels": {
"maintainer": "NGINX Docker Maintainers <[email protected]>"
},
"StopSignal": "SIGTERM"
},
"DockerVersion": "17.06.2-ce",
"Author": "",
"Config": {
"Hostname": "",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"80/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"NGINX_VERSION=1.15.7-1~stretch",
"NJS_VERSION=1.15.7.0.2.6-1~stretch"
],
"Cmd": [
"nginx",
"-g",
"daemon off;"
],
"ArgsEscaped": true,
"Image": "sha256:cf9409661039371fa3448619fb988625e4542108921c4c8f923c5bccc51601eb",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": [],
"Labels": {
"maintainer": "NGINX Docker Maintainers <[email protected]>"
},
"StopSignal": "SIGTERM"
},
"Architecture": "amd64",
"Os": "linux",
"Size": 109116878,
"VirtualSize": 109116878,
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/a636ad849dde56a8f7564fd10fdc1295f8147a2c69415c813397005e36912eb8/diff:/var/lib/docker/overlay2/e7600dc218916e990c0a8da2e5ef0b704a3fbde3fadc974c0c6bfbfb59bdbfdd/diff",
"MergedDir": "/var/lib/docker/overlay2/dc899d7a73b75da0dbfbd23f7f46588b3973fed065517f14705145643ab0b735/merged",
"UpperDir": "/var/lib/docker/overlay2/dc899d7a73b75da0dbfbd23f7f46588b3973fed065517f14705145643ab0b735/diff",
"WorkDir": "/var/lib/docker/overlay2/dc899d7a73b75da0dbfbd23f7f46588b3973fed065517f14705145643ab0b735/work"
},
"Name": "overlay2"
},
"RootFS": {
"Type": "layers",
"Layers": [
"sha256:ef68f6734aa485edf13a8509fe60e4272428deaf63f446a441b79d47fc5d17d3",
"sha256:ad5345cbb119f7c720123e3adf28b164143e4157ca6e46a629ca694e75f7825f",
"sha256:ece4f9fdef598687f23d39643bacbf2c609201b087b93bbae81b931da72d2a64"
]
},
"Metadata": {
"LastTagTime": "2018-12-13T20:44:49.706590964-05:00"
}
}
]
2.4.查詢映象
# docker search php NAME DESCRIPTION STARS OFFICIAL AUTOMATED php While designed for web development, the PHP … 4183 [OK] phpmyadmin/phpmyadmin A web interface for MySQL and MariaDB. 689 [OK] richarvey/nginx-php-fpm Container running Nginx + PHP-FPM capable of… 663 [OK] composer Composer is a dependency manager written in … 325 [OK] adminer Database management in a single PHP file. 196 [OK] php-zendserver Zend Server - the integrated PHP application… 160 [OK] webdevops/php-nginx Nginx with PHP-FPM 119 [OK] webdevops/php-apache-dev PHP with Apache for Development (eg. with xd… 94 [OK] webdevops/php-apache Apache with PHP-FPM (based on webdevops/php) 80 [OK] phpunit/phpunit PHPUnit is a programmer-oriented testing fra… 65 [OK] bitnami/php-fpm Bitnami PHP-FPM Docker Image 62 [OK] nazarpc/phpmyadmin phpMyAdmin as Docker container, based on off… 60 [OK] 1and1internet/ubuntu-16-nginx-php-phpmyadmin-mysql-5 ubuntu-16-nginx-php-phpmyadmin-mysql-5 48 [OK] tetraweb/php PHP 5.5, 5.6, 7.0, 7.1 for CI and running te… 30 [OK] wodby/drupal-php PHP for Drupal 27 [OK] circleci/php CircleCI images for PHP 21 clinta/phpipam phpIPAM web IP address management applicatio… 18 [OK] centos/php-56-centos7 Platform for building and running PHP 5.6 ap… 17 antage/apache2-php5 Docker image for running Apache 2.x with PHP… 12 [OK] graze/php-alpine Smallish php7 alpine image with some common … 11 [OK] 1and1internet/ubuntu-16-nginx-php-phpmyadmin-mariadb-10 ubuntu-16-nginx-php-phpmyadmin-mariadb-10 11 [OK] appsvc/php Azure App Service php dockerfiles 6 [OK] phpspec/phpspec PHPSpec: A php toolset to drive emergent des… 5 [OK] lephare/php PHP container 4 [OK] isotopab/php Docker PHP 0 [OK]
NAME：映象名稱
DESCRIPTION：映象描述
STARS：使用者對映象的評分
OFFICIAL：是否為官方映象。
AUTOMATED：是否使用了自動構建
2.5.刪除映象
docker rmi [NAME]/[CONTAINER ID]對於不需要的映象，可以使用rmi命令刪除。
-f：強制刪除
2.5.1.刪除自己tag的nginx
# docker rmi nginx:1.2 Untagged: nginx:1.2
# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx latest 568c4670fa80 2 weeks ago 109MB busybox latest 59788edf1f3e 2 months ago 1.15MB
2.5.2.下載的nginx還在，還可以使用ID刪除
# docker rmi 568c4670fa80 Untagged: nginx:latest Untagged: [email protected]:5d32f60db294b5deb55d078cd4feb410ad88e6fe77500c87d3970eca97f54dba Deleted: sha256:568c4670fa800978e08e4a51132b995a54f8d5ae83ca133ef5546d092b864acf Deleted: sha256:ac0442c0fafd48e24a96fa3099ea7ad20012c8759e1dd03dd387dbfbe382984c Deleted: sha256:6b9d35d8d75115937cd78da275f527cccef672cbd71f34062dffe2e930fd7e13 Deleted: sha256:ef68f6734aa485edf13a8509fe60e4272428deaf63f446a441b79d47fc5d17d3
# docker images REPOSITORY TAG IMAGE ID CREATED SIZE busybox latest 59788edf1f3e 2 months ago 1.15MB
2.5.3.刪除全部映象：
# docker rmi $(docker images -q)