要求核心版本高於3.10的64位系統支援Docker
[[email protected] imagedb]# uname -a
Linux localhost.localdomain 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
[[email protected] imagedb]# more /etc/redhat-release 
CentOS Linux release 7.2.1511 (Core) 


使用yum安裝Docker（保證主機能上網）
[[email protected] imagedb]#yum install docker


檢視Docker已經安裝
[

[email protected] imagedb]#rpm -qa | grep docker
docker-client-1.12.6-55.gitc4618fb.el7.centos.x86_64
docker-1.12.6-55.gitc4618fb.el7.centos.x86_64
docker-common-1.12.6-55.gitc4618fb.el7.centos.x86_64


啟動docker
[[email protected] imagedb]# systemctl start docker.service


檢視docker版本
[[email protected] ~]# 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

Server:
 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


測試執行hello word
[

[email protected] ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
Trying to pull repository docker.io/library/hello-world ... 
latest: Pulling from docker.io/library/hello-world
5b0f327be733: Pull complete 
Digest: sha256:1f19634d26995c320618d94e6f29c09c6589d5df3c063287a00e6de8458f8242

Hello from Docker!

This message shows that your installation appears to be working correctly.



下載並載入我們的第一個centos容器（下載時間很長）
[[email protected] ~]# docker run -i -t centos
Unable to find image 'centos:latest' locally
Trying to pull repository docker.io/library/centos ... 
latest: Pulling from docker.io/library/centos
d9aaf4d82f24: Pull complete 
Digest: sha256:eba772bac22c86d7d6e72421b4700c3f894ab6e35475a34014ff8de74c10872e
[[email protected] /]# 



檢視使用第一個容器
[[email protected] /]# more /etc/redhat-release 
CentOS Linux release 7.4.1708 (Core) 
[[email protected] /]# hostname
3af0e01415a4
[[email protected] /]# more /etc/host
host.conf    hostname     hosts        hosts.allow  hosts.deny   
[[email protected] /]# more /etc/hosts
127.0.0.1localhost
::1localhost ip6-localhost ip6-loopback
fe00::0ip6-localnet
ff00::0ip6-mcastprefix
ff02::1ip6-allnodes
ff02::2ip6-allrouters
172.17.0.23af0e01415a4
[[email protected] /]# ping www.hao123.com
PING hao123.n.shifen.com (115.239.217.167) 56(84) bytes of data.
64 bytes from 115.239.217.167 (115.239.217.167): icmp_seq=1 ttl=127 time=76.3 ms
64 bytes from 115.239.217.167 (115.239.217.167): icmp_seq=2 ttl=127 time=47.2 ms
64 bytes from 115.239.217.167 (115.239.217.167): icmp_seq=3 ttl=127 time=47.9 ms
64 bytes from 115.239.217.167 (115.239.217.167): icmp_seq=4 ttl=127 time=47.2 ms
64 bytes from 115.239.217.167 (115.239.217.167): icmp_seq=5 ttl=127 time=47.9 ms


exit退出容器(退出容器後容器就停止工作)
[[email protected] /]# exit
exit
[[email protected] ~]# 


檢視已經下載的映象
[[email protected] ~]# docker images
REPOSITORY              TAG                 IMAGE ID            CREATED             SIZE
docker.io/centos        latest              196e0ce0c9fb        7 days ago          196.6 MB
docker.io/hello-world   latest              05a3bd381fc2        9 days ago          1.84 kB