On 12/07/2011 11:31 PM, Eric_YH_Chen@xxxxxxxxxxx wrote:
Hi, Tommi:
What I see is like this.
lrwxrwxrwx 1 root root 10 2011-12-07 16:48 foo1:0 -> ../../rbd0
lrwxrwxrwx 1 root root 10 2011-12-07 16:50 foo2:1 -> ../../rbd1
The extra number (:0 and :1) behind the image name make the problem still exists.
I'm not sure why we had the device number in the udev rule. I removed it
in 891025e539a92b5d75011e2e75c475fc0c272042.
-----Original Message-----
From: Tommi Virtanen [mailto:tommi.virtanen@xxxxxxxxxxxxx]
Sent: Thursday, December 08, 2011 1:31 AM
To: Eric YH Chen/WHQ/Wistron
Cc: ceph-devel@xxxxxxxxxxxxxxx; Chris YT Huang/WHQ/Wistron
Subject: Re: rbd device would disappear after re-boot
On Tue, Dec 6, 2011 at 18:38,<Eric_YH_Chen@xxxxxxxxxxx> wrote:
I have another little question. Could I map specific image to specific device?
For example:
Before re-boot
id pool image snap device
0 rbd foo1 - /dev/rbd0
1 rbd foo3 - /dev/rbd2
How could I re-map the image(foo3) to device(/dev/rbd2) but skip rbd1? The command provided by ceph CLI cannot achieve this.
If I re-map the image to another device, it would not sync with iSCSI configuration and may cause problem.
I'm just confirming what Damien said. Don't rely on the numbering to
be consistent even from one boot to another; we provide a udev helper
that assigns more permanent names, based on the pool, image name, and
potentially snapshot name. You'll get a symlink like
/dev/rbd/POOL/IMAGE or /dev/rbd/POOL/IMAGE@SNAP, use that name.
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