docker基础2–镜像、容器等基本操作：
1.查询镜像基础方法[高级方法，见cocker基础1]
docker search centos
[root@centos77 ~]# docker search centos
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
centos The official build of CentOS. 6370 [OK]
ansible/centos7-ansible Ansible on Centos7 132 [OK]
consol/centos-xfce-vnc Centos container with "headless" VNC session… 125 [OK]
jdeathe/centos-ssh OpenSSH / Supervisor / EPEL/IUS/SCL Repos - … 117 [OK]
centos/systemd systemd enabled base container. 93 [OK]
centos/mysql-57-centos7 MySQL 5.7 SQL database server 87
imagine10255/centos6-lnmp-php56 centos6-lnmp-php56 58 [OK]
tutum/centos Simple CentOS docker image with SSH access 46
centos/postgresql-96-centos7 PostgreSQL is an advanced Object-Relational … 45
kinogmt/centos-ssh CentOS with SSH 29 [OK]
pivotaldata/centos-gpdb-dev CentOS image for GPDB development. Tag names… 13
guyton/centos6 From official centos6 container with full up… 10 [OK]
这里面的“OFFICIAL”是代表 官方发布的版本。“STARS”星星–个人理解就是热门版本，我们下载就是参照这两个参数就是可以了
2.查询系统中下载了哪些镜像
docker images
3.删除镜像的办法
docker rmi 镜像id
4.导出镜像
示例：以“busybox”为例进行测试
[root@centos77 ~]# docker save -o busy1.tar busybox:latest
[root@centos77 ~]#
[root@centos77 ~]# ls
1.txt busy1.tar install.sh psutil-5.2.2.tar.gz
或者这样导出也可以
[root@centos77 ~]# docker save > busy2.tar busybox:latest
[root@centos77 ~]# ls
1.txt anaconda-ks.cfg busy1.tar busy2.tar
[root@centos77 ~]#
5.导入镜像
5.1先删除使用镜像的容器
[root@centos77 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1811ea42d922 busybox:latest "/bin/sh" 2 days ago Exited (137) 2 days ago vibrant_vaughan
156f134c5468 nginx "nginx -g 'daemon
[root@centos77 ~]# docker rm 1811
1811
5.2在删除镜像
[root@centos77 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
busybox latest b97242f89c8a 8 days ago 1.23MB
删除镜像busybox的id“b97242f89c8a”可以简写
[root@centos77 ~]# docker rmi b97
Untagged: busybox:latest
Untagged: busybox@sha256:c5439d7db88ab5423999530349d327b04279ad3161d7596d2126dfb5b02bfd1f
Deleted: sha256:b97242f89c8a29d13aea12843a08441a4bbfc33528f55b60366c1d8f6923d0d4
Deleted: sha256:0064d0478d0060343cb2888ff3e91e718f0bffe9994162e8a4b310adb2a5ff74
[root@centos77 ~]#
5.3导出镜像
进入镜像所在的目录，然后执行导入命令
[root@centos77 ~]# ls
1.txt anaconda-ks.cfg busy1.tar busy2.tar initial-setup-ks.cfg install.sh psutil-5.2.2.tar.gz
[root@centos77 ~]# docker load -i busy1.tar
0064d0478d00: Loading layer [==================================================>] 1.45MB/1.45MB
Loaded image: busybox:latest
[root@centos77 ~]#
在查询下就是可以看到镜像已经导入进去了
[root@centos77 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
busybox latest b97242f89c8a 8 days ago 1.23MB