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前面说了docker的安装和docker容器的使用后，本文在列一下常见的docker_images的使用方法
docker镜像的使用，在docker的安装和容器篇都有实例，本文主要概况一下images的使用方法和创建image以及设置image的标签。
查询本地images
[root@www /]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 568c4670fa80 7 days ago 109MB
training/webapp latest 6fae60ef3446 3 years ago 349MB
名称 标签 镜像id 下拉时间 存储
查询网上可用images
1：查询nginx可用镜像
[root@www /]# docker search nginx
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
nginx Official build of Nginx. 10461 [OK]
jwilder/nginx-proxy Automated Nginx reverse proxy for docker con… 1480 [OK]
richarvey/nginx-php-fpm Container running Nginx + PHP-FPM capable of… 657 [OK]
jrcs/letsencrypt-nginx-proxy-companion LetsEncrypt container to use with nginx as p… 449 [OK]
...2：查询mysql可用镜像
[root@www /]# docker search mysql
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
mysql MySQL is a widely used, open-source relation… 7474 [OK]
mariadb MariaDB is a community-developed fork of MyS… 2410 [OK]
mysql/mysql-server Optimized MySQL Server Docker images. Create… 557 [OK]
zabbix/zabbix-server-mysql Zabbix Server with MySQL database support 150 [OK]
...pull镜像（下载镜像）
这里就以上面的mysql镜像为例
[root@www /]# docker pull mysql
Using default tag: latest
latest: Pulling from library/mysql
a5a6f2f73cd8: Already exists
936836019e67: Pull complete
283fa4c95fb4: Pull complete
1f212fb371f9: Pull complete
e2ae0d063e89: Pull complete
5ed0ae805b65: Pull complete
0283dc49ef4e: Pull complete
a7e1170b4fdb: Pull complete
88918a9e4742: Pull complete
241282fa67c2: Pull complete
b0fecf619210: Pull complete
bebf9f901dcc: Pull complete
Digest: sha256:b7f7479f0a2e7a3f4ce008329572f3497075dc000d8b89bac3134b0fb0288de8
Status: Downloaded newer image for mysql:latest
[root@www /]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 568c4670fa80 7 days ago 109MB
mysql latest f991c20cb508 2 weeks ago 485MB
training/webapp latest 6fae60ef3446 3 years ago 349MB
创建image：一个属于自己的镜像
1：更新image（在原有的基础上创建image）
①：创建容器mysql_1.0
[root@www /]# docker run -i -t --name Centos_1.0 centos /bin/bash
...
root@b8bc689a97b0:/#
在Centos_1.0中安装一个mysql服务（这里就不做详细过程了）
安装好后exit
[root@www /]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b8bc689a97b0 mysql "docker-entrypoint.s…" 6 minutes ago Exited (127) 2 minutes ago Centos_1.0②：提交容器到新的image
[root@www /]# docker commit -m="this is Centos_1.0 install mysql server" -a="God" b8bc689a97b0 mysql/centos:v1
sha256:46e6044e776894af153c6744c2aa23810e0066e8abe81eacbb9a9dfc1ad2bb88
[root@www /]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
mysql/centos v1 46e6044e7768 13 seconds ago 485MB
nginx latest 568c4670fa80 7 days ago 109MB
mysql latest f991c20cb508 2 weeks ago 485MB
training/webapp latest 6fae60ef3446 3 years ago 349MB
-m：image的描述信息
-a：image的作者
然后是安装mysql后的容器id和需要给image命名的名字：标签（mysql/centos:v1）
2：构建image（一个全新的image）
需要使用dockerfile来创建image
[root@www ~]# vim Dockerfile
FROM centos:6.7
MAINTAINER Fisher "[email protected]"
RUN /bin/echo 'root:123456' |chpasswd
RUN useradd runoob
RUN /bin/echo 'runoob:123456' |chpasswd
RUN /bin/echo -e "LANG=\"en_US.UTF-8\"" >/etc/default/local
EXPOSE 22
EXPOSE 80
CMD /usr/sbin/sshd -D
注意：
第一个大写
上面文件中第一行的from是指定镜像的源
run是在镜像中执行什么命令，安装的内容
使用docker bulid调用Dockerfile文件
[root@www ~]# docker build -t centos:6.7 .
后面有个点，注意不要写掉了
[root@www ~]# docker build -t centos:6.7 .
Sending build context to Docker daemon 227.5MB
Step 1/9 : FROM centos:6.7
6.7: Pulling from library/centos
cbddbc0189a0: Pull complete
...
Removing intermediate container 5ba438193ea1
---> 9c34f3105b8a
Step 8/9 : EXPOSE 80
---> Running in 8124de73f09d
Removing intermediate container 8124de73f09d
---> 9949844420c2
Step 9/9 : CMD /usr/sbin/sshd -D
---> Running in 3528928bf8cf
Removing intermediate container 3528928bf8cf
---> 24c8dcf32058
Successfully built 24c8dcf32058
Successfully tagged centos:6.7
创建成功：
[root@www ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
centos 6.7 24c8dcf32058 2 minutes ago 191MB
mysql/centos v1 46e6044e7768 14 minutes ago 485MB
nginx latest 568c4670fa80 7 days ago 109MB
mysql latest f991c20cb508 2 weeks ago 485MB
centos <none> 192ad0341c8b 8 weeks ago 191MB
training/webapp latest 6fae60ef3446 3 years ago 349MB
设置镜像标签
[root@www ~]# docker tag 24c8dcf32058 centos:v1
[root@www ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
centos 6.7 24c8dcf32058 4 minutes ago 191MB
centos v1 24c8dcf32058 4 minutes ago 191MB
mysql/centos v1 46e6044e7768 16 minutes ago 485MB
nginx latest 568c4670fa80 7 days ago 109MB
mysql latest f991c20cb508 2 weeks ago 485MB
centos <none> 192ad0341c8b 8 weeks ago 191MB
training/webapp latest 6fae60ef3446 3 years ago 349MB
镜像标签可以在docker镜像过多时用 docker rmi 删掉多余的images。另外，想要将本地镜像发布到网上，（以docker hub网站为例）需要注册docker hub并且使用docker push命令
完！