Linux 修改 Docker Storage Driver

overlay2需要高内核支持，低内核使用overlay

1. 开启文件系统 ftype

umount /dev/mapper/centos-home  //device的路径可以在xfs_info中找到
//如果提示device is busy
umount -l /dev/mapper/centos-home //强制卸载同时要重启
mkfs.xfs -n ftype=1 /dev/mapper/centos-home  //重新格式化device，在此
mount /dev/mapper/centos-home /home   //重新挂载
xfs_info /home    //查看结果

2. Docker 配置指定 storage-driver

cat /etc/docker/daemon.json 
{
  "storage-driver":"overlay2",
  "data-root":"/data/docker/lib",
  "exec-root":"/data/docker/run",
  "registry-mirrors": ["https://mirror.ccs.tencentyun.com","http://hub-mirror.c.163.com","https://docker.mirrors.ustc.edu.cn"]
}