Bug 1286026 - partial_activation check fails in pacemaker
partial_activation check fails in pacemaker
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: resource-agents (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
: rc
: ---
Assigned To: Oyvind Albrigtsen
Depends On:
Blocks: 1269194
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Reported: 2015-11-27 04:38 EST by Josef Zimek
Modified: 2016-08-02 13:36 EDT (History)
6 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2016-08-02 13:36:26 EDT
Type: Bug
Regression: ---
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Josef Zimek 2015-11-27 04:38:59 EST
Description of problem:
Customer is using a HA-LVM mirror logical volumes as resource for Pacemaker cluster.

When using the option 'partial_activation=true', like in the following resource,

# pcs resource show vgexample
 Resource: vgexample (class=ocf provider=heartbeat type=LVM)
  Attributes: volgrpname=vg_example exclusive=true partial_activation=true

Customer expects that in case of failure of a logical volume segment (missing PV), the cluster can still activate the VG and start the volume (in the LVM script, 'partial_activation=true' converts to 'vgchange -ay ... <vg> --partial')

But when running:

# pcs resource move res_grp    # res_grp is resource group with the vgexample resource

it fails.

It's because in the LVM ocf script, before doing the vgchange, the script
runs 'vgck <vg>' (in the LVM_validate_all() function) which fails because of
the missing PV.

When commenting out the vgck part as a test and everything worked as expected.

Version-Release number of selected component (if applicable):
RHEL 6.7

# rpm -qf /usr/lib/ocf/resource.d/heartbeat/LVM

How reproducible:

Steps to Reproduce:
1. move resource group which consist of LVM resource with partial_activation=true

Actual results:
Resource group fails to move

Expected results:
The LVM_validate_all() should check the value of OCF_RESKEY_partial_activation
before trying vgck. And the resource group moves to other node

Additional info:
Comment 2 Oyvind Albrigtsen 2015-11-27 04:54:33 EST
Can he test the patch I've attached to the following bz?
Comment 3 Oyvind Albrigtsen 2015-12-16 09:38:33 EST
Josef: Can you ask the customer if he can test the patch mentioned in comment #2?
Comment 4 Josef Zimek 2015-12-16 10:03:46 EST
Oyvind: Yes, I will let you know the result once I got feedback from customer. Thanks
Comment 7 John Ruemker 2016-08-02 13:36:26 EDT
Closing this out.  The issue described is resolved via the errata that was released in 6.8 via Bugzilla #1266173.  The customer case eventually closed without confirmation of the fix, but we expect that it should have been resolved.

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