The purpose is to verify where my data is stored on the Ceph cluster.
For this, I have just create a minimal cluster with 3 osd :
$ ceph-deploy osd create ceph-01:/dev/sdb ceph-02:/dev/sdb ceph-03:/dev/sdb
Where is my osd directory on ceph-01 ?
$ mount | grep ceph
/dev/sdb1 …I add script to create snapshot on rbd for use with samba shadow_copy2. For more details go on https://github.com/ksperis/autosnap-rbd-shadow-copy
Before you need to have ceph cluster running and samba installed.
Verify admin access to the ceph cluster : (should not return error)
$ rbd ls …Create block device and map it with /etc/ceph/rbdmap
$ rbd create rbd/myrbd --size=1024
$ echo "rbd/myrbd" >> /etc/ceph/rbdmap
$ service rbdmap reload
[ ok ] Starting RBD Mapping: rbd/myrbd.
[ ok ] Mounting all filesystems...done.
View rbd mapped :
$ rbd showmapped
id pool image snap device …$ rbd rm rbd/myrbd
Removing image: 99% complete...failed.2013-08-02 14:07:17.530470 7f3ba2692760 -1 librbd: error removing header: (16) Device or resource busy
rbd: error: image still has watchers
This means the image is still open or the client using it crashed. Try again after closing/unmapping it …Don't forget to stop IO before sync and unmap rbd before rename.
$ rbd export rbd/myrbd - | rbd import --image-format 2 - rbd/myrbd_v2
$ rbd mv rbd/myrbd rbd/myrbd_old
$ rbd mv rbd/myrbd_v2 rbd/myrbd
Check :
$ rbd info rbd/myrbd
$ rbd image 'myrbd':
size 102400 KB in …