docker 实践(二）镜像
一、获取镜像1.1.从仓库(Docker hub)获取一个镜像
# docker pull busybox
Using default tag: latest #默认标签为最新
latest: Pulling from library/busybox#镜像来源
90e01955edcd: Pull complete #pull 进度
Digest: sha256:2a03a6059f21e150ae84b0973863609494aad70f0a80eaeb64bddd8d92465812#签名
Status: Downloaded newer image for busybox:latest #pull 状态 1.2.查看本地镜像
# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
busybox latest 59788edf1f3e 2 months ago 1.15MB REPOSITORY：仓库
TAG：镜像标签
IMAGE ID：镜像唯一ID
CREATED：创建时间
SIZE：镜像大小
二、镜像管理
2.1.下载nginx镜像
# docker pull nginx 2.1.2.查看当前镜像
# 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.为静态打标签
2.2.1.为nginx镜像打一个tag
# docker tag nginx:latest nginx:1.2 注意：给镜像打tag的时候不要只打"latest"
查看本地镜像：
# 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.查看镜像详细信息
# docker inspect 568c4670fa80
[
{
"Id": "sha256:568c4670fa800978e08e4a51132b995a54f8d5ae83ca133ef5546d092b864acf",
"RepoTags": [
"nginx:1.2",
"nginx:latest"
],
"RepoDigests": [
"nginx@sha256:5d32f60db294b5deb55d078cd4feb410ad88e6fe77500c87d3970eca97f54dba"
],
"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 "
},
"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 "
},
"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.查找镜像
# docker search php
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
php While designed for web development, the PHP … 4183
phpmyadmin/phpmyadmin A web interface for MySQL and MariaDB. 689
richarvey/nginx-php-fpm Container running Nginx + PHP-FPM capable of… 663
composer Composer is a dependency manager written in … 325
adminer Database management in a single PHP file. 196
php-zendserver Zend Server - the integrated PHP application… 160
webdevops/php-nginx Nginx with PHP-FPM 119
webdevops/php-apache-dev PHP with Apache for Development (eg. with xd… 94
webdevops/php-apache Apache with PHP-FPM (based on webdevops/php) 80
phpunit/phpunit PHPUnit is a programmer-oriented testing fra… 65
bitnami/php-fpm Bitnami PHP-FPM Docker Image 62
nazarpc/phpmyadmin phpMyAdmin as Docker container, based on off… 60
1and1internet/ubuntu-16-nginx-php-phpmyadmin-mysql-5 ubuntu-16-nginx-php-phpmyadmin-mysql-5 48
tetraweb/php PHP 5.5, 5.6, 7.0, 7.1 for CI and running te… 30
wodby/drupal-php PHP for Drupal 27
circleci/php CircleCI images for PHP 21
clinta/phpipam phpIPAM web IP address management applicatio… 18
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
graze/php-alpine Smallish php7 alpine image with some common … 11
1and1internet/ubuntu-16-nginx-php-phpmyadmin-mariadb-10 ubuntu-16-nginx-php-phpmyadmin-mariadb-10 11
appsvc/php Azure App Service php dockerfiles 6
phpspec/phpspec PHPSpec: A php toolset to drive emergent des… 5
lephare/php PHP container 4
isotopab/php Docker PHP 0 NAME：镜像名称
DESCRIPTION：镜像描述
STARS：用户对镜像的评分
OFFICIAL：是否为官方镜像。
AUTOMATED：是否使用了自动构建
2.5.删除镜像
docker rmi /对于不需要的镜像，可以使用rmi命令删除。
-f：强制删除
2.5.1.删除自己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.下载的nginx还在，还可以使用ID删除
# docker rmi 568c4670fa80
Untagged: nginx:latest
Untagged: nginx@sha256:5d32f60db294b5deb55d078cd4feb410ad88e6fe77500c87d3970eca97f54dba
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.删除全部镜像：
# docker rmi $(docker images -q)
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