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1.docker镜像管理
1.1.搜索镜像
语法格式
docker search 镜像名
选镜像的建议：
- 优先考虑官方
- starts数量多（使用的人越多）
[root@192.168.146.112~]# docker search tomcat
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
tomcat Apache Tomcat is an open source implementati… 3070 [OK]
tomee Apache TomEE is an all-Apache Java EE certif… 91 [OK]
dordoka/tomcat Ubuntu 14.04, Oracle JDK 8 and Tomcat 8 base… 57 [OK]
kubeguide/tomcat-app Tomcat image for Chapter 1 30
consol/tomcat-7.0 Tomcat 7.0.57, 8080, "admin/admin" 18 [OK]
cloudesire/tomcat Tomcat server, 6/7/8 15 [OK]
aallam/tomcat-mysql Debian, Oracle JDK, Tomcat & MySQL 13 [OK]
arm32v7/tomcat Apache Tomcat is an open source implementati… 11
rightctrl/tomcat CentOS , Oracle Java, tomcat application ssl… 6 [OK]
NAME：镜像名称，一般镜像名称前面没有/的表示官方
OESCRIPTION：镜像描述
STARS：点赞数量
OFFICIAL：是否是官方
AUTOMATEO：是否自动化安装
1.2.获取镜像
docker pull 镜像名（push）
docker pull 第三方镜像连接
[root@192.168.146.112~]# docker pull httpd:2.2
2.2: Pulling from library/httpd
f49cf87b52c1: Pull complete
24b1e09cbcb7: Pull complete
8a4e0d64e915: Pull complete
bcbe0eb4ca51: Pull complete
16e370c15d38: Pull complete
Digest: sha256:9784d70c8ea466fabd52b0bc8cde84980324f9612380d22fbad2151df9a430eb
Status: Downloaded newer image for httpd:2.2
docker.io/library/httpd:2.2
docker pull 镜像:版本
如果直接写镜像，那下载的镜像是当前时间最新的版本
1.3.镜像加速
1.配置加速器地址，根据自己的环境来配置
[root@192.168.146.112~]# vim /etc/docker/daemon.json
{
"registry-mirrors": ["https://registry.docker-cn.com"]
}
2.重载服务
[root@192.168.146.112~]# systemctl restart docker
3.下载一个镜像看下是否加速
[root@192.168.146.112~]# time docker pull httpd:2.4
2.4: Pulling from library/httpd
b4d181a07f80: Already exists
4b72f5187e6e: Pull complete
12b2c44d04b2: Pull complete
35c238b46d30: Pull complete
1adcec05f52b: Pull complete
Digest: sha256:1fd07d599a519b594b756d2e4e43a72edf7e30542ce646f5eb3328cf3b12341a
Status: Downloaded newer image for httpd:2.4
docker.io/library/httpd:2.4
real 2m42.165s
user 0m0.024s
sys 0m0.105s
1.4.查看所有镜像
两种方式
docker image ls
docker images
[root@192.168.146.112~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
httpd 2.4 bd29370f84ea 6 days ago 138MB
nginx latest 4cdc5dd7eaad 8 days ago 133MB
tomcat latest 36ef696ea43d 12 days ago 667MB
httpd 2.2 e06c3dbbfe23 3 years ago 171MB
[root@192.168.146.112~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
httpd 2.4 bd29370f84ea 6 days ago 138MB
nginx latest 4cdc5dd7eaad 8 days ago 133MB
tomcat latest 36ef696ea43d 12 days ago 667MB
httpd 2.2 e06c3dbbfe23 3 years ago 171MB
REPOSITORY：镜像名称
TAG：版本
IMAGE ID：镜像id
CREATED：创建时间
SIZE：大小
1.5.备份镜像
语法格式
docker save 镜像名:版本 > xxx.tar.gz
[root@192.168.146.112~]# docker save nginx:latest > docker_nginx_latest.tar.gz
1.6.删除镜像
语法格式：
docker image rm 镜像:版本
[root@192.168.146.112~]# docker image rm nginx:latest
Error response from daemon: conflict: unable to remove repository reference "nginx:latest" (must force) - container a9e8cd73690d is using its referenced image 4cdc5dd7eaad
删除报错表示docker中的nginx开启，需要强制删除
强制删除
[root@192.168.146.112~]# docker image rm nginx:latest --force
Untagged: nginx:latest
Untagged: nginx@sha256:353c20f74d9b6aee359f30e8e4f69c3d7eaea2f610681c4a95849a2fd7c497f9
1.7.恢复镜像
语法格式：docker load -i xxx.tar.gz
[root@192.168.146.112~]# docker load -i docker_nginx_latest.tar.gz
Loaded image: nginx:latest
[root@192.168.146.112~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
httpd 2.4 bd29370f84ea 6 days ago 138MB
nginx latest 4cdc5dd7eaad 8 days ago 133MB
tomcat latest 36ef696ea43d 12 days ago 667MB
httpd 2.2 e06c3dbbfe23 3 years ago 171MB
启动镜像
[root@192.168.146.112~]# docker run -d -p 81:80 nginx:latest
1.8.镜像硬连接
语法格式：docker image tag 原镜像 新镜像
[root@192.168.146.112~]# docker image tag httpd:2.2 http2.2_test
[root@192.168.146.112~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
httpd 2.4 bd29370f84ea 6 days ago 138MB
nginx latest 4cdc5dd7eaad 8 days ago 133MB
tomcat latest 36ef696ea43d 12 days ago 667MB
http2.2_test latest e06c3dbbfe23 3 years ago 171MB
httpd 2.2 e06c3dbbfe23 3 years ago 171MB
删除原来的新的还在
[root@192.168.146.112~]# docker image rm httpd:2.2
Untagged: httpd:2.2
Untagged: httpd@sha256:9784d70c8ea466fabd52b0bc8cde84980324f9612380d22fbad2151df9a430eb
[root@192.168.146.112~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
httpd 2.4 bd29370f84ea 6 days ago 138MB
nginx latest 4cdc5dd7eaad 8 days ago 133MB
tomcat latest 36ef696ea43d 12 days ago 667MB
http2.2_test latest e06c3dbbfe23 3 years ago 171MB
