[CentOS] lvm snapshot
Axel Glienke
axel at glienke.cc
Wed Dec 2 22:02:52 UTC 2015
ok, thank you very much Gordon.
but you know what the difference?
if i do
1. centos7 installation
2. yum upgrade
3. lvcreate -s ...
4. reboot
then i got the error.
if i do your way
1. centos7 installtion
2. snapshot & reboot
3. yum upgrade
4. reboot
then the system start.
Zitat von Gordon Messmer <gordon.messmer at gmail.com>:
> On 12/02/2015 12:05 PM, Axel Glienke wrote:
>> in journalctl i found:
>> modprobe: FATAL: Module dm-snapshot not found
>> ...
>> Can't process LV root_snap: snapshot target support missing from kernel
>
> I installed a very simple CentOS 7 system with an LVM root FS.
> Created a snapshot and rebooted, no problem. Updated dracut, then
> updated everything else and rebooted, no problem.
>
> As far as I can tell, dracut normally includes the entire kernel
> module tree under kernel/drivers/md, which should provide the
> dm-snapshot module required to complete the boot sequence.
>
> I can't determine what's causing the problem you see, but it doesn't
> appear to affect a standard installation.
>
> Try:
>
> dracut --force --debug > /var/tmp/dracut.txt 2>&1
>
> Upload /var/tmp/dracut.txt to http://paste.fedoraproject.org/. I'll
> see if I spot anything useful.
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Grüße
Axel
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