阿里云服务器安装docker
1.阿里云服务器系统选择centos7。
2.yum install docker
3.service docker start
4.如果报错，Could not find a free IP address range for interface 'docker0'. Please configure its address manually and run 'docker -b docker0'，则是系统路由问题，将/etc/sysconfig/network-scripts/route-eth0中的172开头的注释掉即可
#172.16.0.0/12 via 10.169.207.247 dev eth0
5.docker info输出即为正常
Containers: 0
Images: 4
Storage Driver: devicemapper
Pool Name: docker-202:1-659458-pool
Pool Blocksize: 65.54 kB
Data file: /var/lib/docker/devicemapper/devicemapper/data
Metadata file: /var/lib/docker/devicemapper/devicemapper/metadata
Data Space Used: 312 MB
Data Space Total: 107.4 GB
Metadata Space Used: 868.4 kB
Metadata Space Total: 2.147 GB
Library Version: 1.02.84-RHEL7 (2014-03-26)
Execution Driver: native-0.2
Kernel Version: 3.10.0-123.9.3.el7.x86_64
Operating System: CentOS Linux 7 (Core)