Bug 1014067 - Add lvmetad udev rules to initramfs and make udev db records for MD devices persistent so LVM on MD autoactivation works correctly
Summary: Add lvmetad udev rules to initramfs and make udev db records for MD devices p...
Alias: None
Product: Fedora
Classification: Fedora
Component: dracut (Show other bugs)
(Show other bugs)
Version: 19
Hardware: All Linux
Target Milestone: ---
Assignee: Harald Hoyer
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: 985638 1002144
TreeView+ depends on / blocked
Reported: 2013-10-01 11:16 UTC by Peter Rajnoha
Modified: 2015-02-18 11:31 UTC (History)
14 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 1011704
Last Closed: 2015-02-18 11:31:44 UTC
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Patch to fix LVM on MD activation (1.09 KB, patch)
2013-10-01 11:16 UTC, Peter Rajnoha
no flags Details | Diff

Description Peter Rajnoha 2013-10-01 11:16:41 UTC
Created attachment 805843 [details]
Patch to fix LVM on MD activation

We need the patch for F19 as well (so LVM can add a patch to solve bug #985638 and bug #1002144).

+++ This bug was initially created as a clone of Bug #1011704 +++

Description of problem:
 lvm2-2.02.102-1.fc21does not boot
reverting to 02.99-2.fc20 fixes the system

--- Additional comment from Nicolas Mailhot on 2013-09-24 23:31:08 CEST ---

--- Additional comment from Nicolas Mailhot on 2013-09-24 23:31:51 CEST ---

--- Additional comment from Peter Rajnoha on 2013-09-25 16:41:52 CEST ---

OK, I've managed to reproduce - the problem here is that the volume is on an MD device which is activated in initrd. There's some missing information we need in udev database which is not handed over after transition to root fs. I'll have a think how to cope with this the best way... but I think we'll need an update for dracut to include some more udev rules in initrd so the udev database is complete when running the udev trigger at boot after change to root fs...

--- Additional comment from Peter Rajnoha on 2013-10-01 13:09:47 CEST ---

Harald, we need the patch attached so that the LVM on MD is properly activated. 

The 69-dm-lvm-metad.rules set some udev env. variables that makes it possible to detect the right time to activate LVM on MD. The MD is very similar to DM during activation - it's usable only after proper device activation - the CHANGE event. We need to make a difference between a CHANGE event that comes from this activation and CHANGE event that is the outcome of the WATCH udev rule (otherwise we'd end up with LVM activation done on each CHANGE event - which is wrong).

So we need the udev databse to be persistent during pivot to root fs even for MD devices.

(also related bug #985638 and bug #1002144)

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