How to isolate Docker containers and stuff…

[root@localhost ~]# pvs
  PV         VG      Fmt  Attr PSize  PFree  
  /dev/md0p1 dockers lvm2 a--  37.25g  37.25g
  /dev/md0p2 mysql   lvm2 a--  37.25g 764.00m
  /dev/sda3  centos  lvm2 a--  12.93g   4.00m

[root@localhost ~]# echo VG=dockers > "/etc/sysconfig/docker-storage-setup"
[root@localhost ~]# docker-storage-setup 
  Rounding up size to full physical extent 40.00 MiB
  Wiping xfs signature on /dev/dockers/docker-poolmeta.
  Logical volume "docker-poolmeta" created.
  Logical volume "docker-pool" created.
  WARNING: Converting logical volume dockers/docker-pool and dockers/docker-poolmeta to pool's data and metadata volumes.
  THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
  Converted dockers/docker-pool to thin pool.
  Logical volume "docker-pool" changed.
[root@localhost ~]# rm /var/lib/docker -rf
[root@localhost ~]# docker start