docker 安装及简单配置
安装：yum install http://mirrors.yun-idc.com/epel/6/i386/epel-release-6-8.noarch.rpm
yum install docker-io
docker -d
问题：
docker: relocation error: docker: symbol dm_task_get_info_with_deferred_remove, version Base not defined in file libdevmapper.so.1.02 with link time reference
解决：
yum upgrade device-mapper-libs -y
/etc/init.d/docker start
docker pull centos
docker run -ti centos /bin/bash
# mkdir /data
# exit
docker commit-m "mkdir /data" -a "wangyl" e302b24977d3 centos:v2
# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
centos v2 822d8c52d05f 13 seconds ago 172.3 MB
centos latest 0f73ae75014f 4 weeks ago 172.3 MB
hello-world latest af340544ed62 9 weeks ago 960 B
导出：
docker save -o centos_wyl.tar centos:v2
导入：
docker load < centos_wyl.tar
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