一、镜像操作
1.1 获取镜像
docker pull 镜像名:标签
。镜像名如nginx、tomcat、centos7、busybox、ubuntu等。一般标签是版本信息,如果没带一般是下载最新版
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# 获取ubuntu系统18.04版本的镜像
[node1 ~]$ docker pull ubuntu:18.04
18.04: Pulling from library/ubuntu
0c5227665c11: Pull complete
Digest: sha256:8aa9c2798215f99544d1ce7439ea9c3a6dfd82de607da1cec3a8a2fae005931b
Status: Downloaded newer image for ubuntu:18.04
docker.io/library/ubuntu:18.04
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1.2 查看镜像信息
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# 查看服务器上已经下载的镜像
[node1 ~]$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat latest 786217b848fd 2 days ago 482MB
nginx latest 6efc10a0510f 2 weeks ago 142MB
busybox latest 7cfbbec8963d 6 weeks ago 4.86MB
ubuntu 18.04 3941d3b032a8 7 weeks ago 63.1MB
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1.3 搜索镜像
可以搜索Registry上的镜像:
docker search 关键词
。搜索出来的列从左到有分别是:镜像名称、描述、评分、是否时官方镜像。
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[node1 ~]$ docker search nginx
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
nginx Official build of Nginx. 18437 [OK]
linuxserver/nginx An Nginx container, brought to you by LinuxS… 193
bitnami/nginx Bitnami nginx Docker Image 159 [OK]
ubuntu/nginx Nginx, a high-performance reverse proxy & we… 86
privatebin/nginx-fpm-alpine PrivateBin running on an Nginx, php-fpm & Al… 72 [OK]
bitnami/nginx-ingress-controller Bitnami Docker Image for NGINX Ingress Contr… 25 [OK]
rancher/nginx-ingress-controller 11
kasmweb/nginx An Nginx image based off nginx:alpine and in… 6
bitnami/nginx-ldap-auth-daemon 3
bitnami/nginx-exporter 3
rapidfort/nginx RapidFort optimized, hardened image for NGINX 3
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1.4 删除镜像
docker rmi 镜像ID/镜像名称
。如果没有指定镜像的标签,默认删除的是latest的镜像
- -f,-force:强制删除镜像,即使有容器依赖了该镜像
- -no-prune:不要清理没有带标签的父镜像
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[node1 ~]$ docker rmi busybox
Untagged: busybox:latest
Untagged: busybox@sha256:b5d6fe0712636ceb7430189de28819e195e8966372edfc2d9409d79402a0dc16
Deleted: sha256:7cfbbec8963d8f13e6c70416d6592e1cc10f47a348131290a55d43c3acab3fb9
Deleted: sha256:baacf561cfff825708763ce7ee4a18293716c533e6ece3bd39009a5fb3c804d2
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清理镜像的遗留文件:docker image prune
- -a:删除所有没用的镜像,不光是临时镜像
- -filter filter:只清理符合过滤条件的镜像
- -f:强制删除镜像,不用进行提示确认
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[node1 ~]$ docker image prune
WARNING! This will remove all dangling images.
Are you sure you want to continue? [y/N] y
Total reclaimed space: 0B
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1.5 导入和导出镜像
1、例如将ubuntu:18.04的镜像导出成ubuntu:18.04.tar
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[node1 ~]$ docker save -o ubuntu:18.04.tar ubuntu:18.04
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2、载入镜像,将docker save
导出的镜像载入到本地镜像库中
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[node1 ~]$ docker load -i ubuntu:18.04.tar
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1.6 上传镜像
我们可以把本地镜像推送到Registry,默认是会推送到Docker Hub,可以对Registry进行设置。
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[node1 ~]$ docker push top.maishuren/nginx:latest
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