参考 http://www.linuxidc.com/Linux/2014-12/110034.htm
安装
yum -y install docker
[root@localhost ~]# docker version
Client:
Version: 1.12.6
API version: 1.24
Package version: docker-1.12.6-55.gitc4618fb.el7.centos.x86_64
Go version: go1.8.3
Git commit: c4618fb/1.12.6
Built: Thu Sep 21 22:33:52 2017
OS/Arch: linux/amd64
Cannot connect to the Docker daemon. Is the docker daemon running on this host? （没启动导致）
启动
systemctl start docker.service
systemctl enable docker.service
[root@localhost ~]# docker info
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 0
Server Version: 1.12.6
Storage Driver: devicemapper
Pool Name: docker-8:3-101859532-pool
Pool Blocksize: 65.54 kB
Base Device Size: 10.74 GB
Backing Filesystem: xfs
Data file: /dev/loop0
Metadata file: /dev/loop1
Data Space Used: 11.8 MB
Data Space Total: 107.4 GB
Data Space Available: 47.25 GB
Metadata Space Used: 581.6 kB
Metadata Space Total: 2.147 GB
Metadata Space Available: 2.147 GB
Thin Pool Minimum Free Space: 10.74 GB
Udev Sync Supported: true
Deferred Removal Enabled: true
Deferred Deletion Enabled: true
Deferred Deleted Device Count: 0
Data loop file: /var/lib/docker/devicemapper/devicemapper/data
WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
Library Version: 1.02.140-RHEL7 (2017-05-03)
Logging Driver: journald
Cgroup Driver: systemd
Plugins:
Volume: local
Network: null host bridge overlay
Swarm: inactive
Runtimes: docker-runc runc
Default Runtime: docker-runc
Security Options: seccomp selinux
Kernel Version: 3.10.0-693.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
Number of Docker Hooks: 3
CPUs: 1
Total Memory: 976.3 MiB
Name: localhost.localdomain
ID: B2TQ:UDTK:F4S4:PI6Z:FWWW:UWZE:KN6W:XE52:3HXY:74GV:SZIR:GJWW
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Insecure Registries:
127.0.0.0/8
Registries: docker.io (secure)
下载centos
docker pull docker.io/centos
确认以下载的镜像
docker images centos