升級centos7的內核爲支持aufs的內核，並重新安裝docker，使它的storage driver爲aufs
升級內核
- 下載aufs的rpm安裝包 kernel-ml-aufs.tgz
- 解壓安裝rpm -ivh 安裝即可
- centos7修改 /etc/default/grub 中GRUB_DEFAULT=saved 爲GRUB_DEFAULT=0，表示之後啓動安裝第一個內核啓動
- grub2-mkconfig -o /boot/grub2/grub.cfg 使上面的修改生效
- reboot 系統
- uanme -r 查看結果3.10.5-3.el6.x86_64
- grep aufs /proc/filesystems 查看結果nodev aufs
升級內核成功
此時如果之前沒有安裝過docker，直接安裝docker即可，如果之前已經安裝過docker
docker info
刪除docker
- yum list installed | grep docker
- yum remove 相應的包
- rm -rf /var/lib/docker
docker info
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 0
Server Version: 1.12.6
Storage Driver: aufs
Root Dir: /var/lib/docker/aufs
Backing Filesystem: xfs
Dirs: 0
Dirperm1 Supported: false
Logging Driver: journald
Cgroup Driver: systemd
Plugins:
Volume: local
Network: overlay bridge null host
Swarm: inactive
Runtimes: docker-runc runc
Default Runtime: docker-runc
Security Options: seccomp
Kernel Version: 3.10.5-3.el6.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64