CEPH uses block device complete operation process

Ceph uses block storage, and the system kernel needs to 3.0 and above the kernel to support some ceph modules.

You can specify a type when creating a block (Type1 and type2) , only type2 can protect the snapshot and protect it before cloning.

Complete operation process with block device:

1 , creating a block device ( in M)

RBD Create yjk01--size 1024x768--pool vms--image-format 2RBD info yjk01--pool VMSRBD map yjk01--pool VMSRBD showmappedmkfs . ext4/dev/rbd0mount/dev/rbd0/mnt

2 , Automatic mounting

Write Fstab First (Blkid See the UUID of the corresponding disk )

uuid=/mnt ext4 Defaults,noatime,_netdev 0 0

Add the following to /etc/rc.local

RBD Map Yjk01--pool vmsmount-a

3 , block expansion

RBD Resize Vms/yjk01--size 2048resize2fs/dev/rbd0

4 , Block Deletion

Umount/dev/rbd0

Delete related content in /etc/ceph/rbdmap and /etc/fstab or /etc/rc.local

RBD UNMAP/DEV/RBD0RBD RM yjk01--pool VMS

only before the map can be mounted, reboot will not automatically map (/etc/init.d/rbdmap has a bug),fstab boot priority higher than the automatic map the priority level

The following script ensures that the system does not get stuck when it restarts, and that a normal auto-mount block device is turned on.

The script does the following:

# CP auto_unmap/etc/rc.d/init.d/# chmod +x/etc/rc.d/init.d/auto_unmap# chkconfig--add auto_unmap# chkconfig auto_unmap On

Content

#!/bin/bash### chkconfig: 02345  99 1# description:           delete all service pid and lockfile############## ######### #readme ########################################## cp auto_unmap /etc/rc.d/init.d/#  chmod +x /etc/rc.d/init.d/auto_unmap# chkconfig --add auto_unmap#  chkconfig auto_unmap on###################### #readme ######################################### function action_start  ()  {echo  ' automap_info_in_rc.local '}function action_stop  ( )  {mount_devices= ' rbd showmapped|sed  ' 2, $p '  -n|awk  ' {print $5} ' for i  in  $mount _devicesdoumount  $irbd  unmap  $idone}case  "$"  instart);; Stop) action_stopecho  ' Auto-unmap is ok ';; status);; *) echo  "Usage: $0 {start}"         exit&Nbsp;1esac 

This article from "Life is endless, struggle not only!" "Blog, be sure to keep this provenance http://linuxnote.blog.51cto.com/9876511/1788682

CEPH uses block device complete operation process