docker安装centos7

拉取centos7镜像

[root@iZ2ze13w9axywmzuqgmegoZ ~]# docker pull centos:centos7
centos7: Pulling from library/centos
2d473b07cdd5: Pull complete 
Digest: sha256:0f4ec88e21daf75124b8a9e5ca03c37a5e937e0e108a255d890492430789b60e
Status: Downloaded newer image for centos:centos7
docker.io/library/centos:centos7

查看镜像

[root@iZ2ze13w9axywmzuqgmegoZ ~]# docker images
REPOSITORY   TAG       IMAGE ID       CREATED        SIZE
centos       centos7   8652b9f0cb4c   3 months ago   204MB

构建容器

[root@iZ2ze13w9axywmzuqgmegoZ ~]# docker run -itd --name centos7 centos:centos7
15296c6e5278b8aa0cf8bd0d0413156f40d4e818ba1938e7edc1f1f76873b5a3

options	mean
i	以交互模式运行容器，通常与 -t 同时使用；
t	为容器重新分配一个伪输入终端，通常与 -i 同时使用；
d	后台运行容器，并返回容器ID；

查看运行的容器

[root@iZ2ze13w9axywmzuqgmegoZ ~]# docker ps
CONTAINER ID   IMAGE            COMMAND       CREATED              STATUS              PORTS     NAMES
15296c6e5278   centos:centos7   "/bin/bash"   About a minute ago   Up About a minute             centos7

进入容器内的系统

[root@iZ2ze13w9axywmzuqgmegoZ ~]# docker exec -it centos7 bash
[root@15296c6e5278 /]#