Bug 1416371 – NFS-Ganesha: Volume gets unexported on localhost if vol stop fails.

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Bug 1416371 - NFS-Ganesha: Volume gets unexported on localhost if vol stop fails.

Summary:	NFS-Ganesha: Volume gets unexported on localhost if vol stop fails.

Status:	NEW

Aliases:	None

Product:	Red Hat Gluster Storage
Classification:	Red Hat
Component:	common-ha (Show other bugs)
Sub Component:
Version:	3.2
Hardware:	Unspecified Unspecified

Priority	unspecified Severity high
Target Milestone:	---
Target Release:	---
Assigned To:	Jiffin
QA Contact:	Manisha Saini
Docs Contact:

URL:
Whiteboard:
Keywords:	FutureFeature, ZStream

Depends On:	1416414
Blocks:	1351530
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Reported:	2017-01-25 06:32 EST by Ambarish
Modified:	2018-10-18 13:24 EDT (History)
CC List:	9 users (show)

See Also:
Fixed In Version:
Doc Type:	Known Issue
Doc Text:	If "gluster volume stop" operation on a volume exported via NFS-ganesha server fails, there is a probability that the volume will get unexported on few nodes, inspite of the command failure. This will lead to inconsistent state across the NFS-ganesha cluster. Workaround: To restore the cluster back to normal state, perform the following - * Identify the nodes where the volume got unexported * Re-export the volume manually using the following dbus command: # dbus-send --print-reply --system --dest=org.ganesha.nfsd /org/ganesha/nfsd/ExportMgr org.ganesha.nfsd.exportmgr.AddExport string:/var/run/gluster/shared_storage/nfs-ganesha/exports/export.<volname>.conf string:"EXPORT(Path=/<volname>)"
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Environment:
Last Closed:
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
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RHEL 7.3 requirements from Atomic Host:
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Description Ambarish 2017-01-25 06:32:19 EST

Description of problem:
-----------------------

Vol stop fails when another gluster operstion,say rebalance is running(which is  expected).

But the volume stop unexports the volume on localhost before it fails on CLI.

It'd be good to do the "unexport" part at the end of the Staging process.

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

nfs-ganesha - 2.4.1.-6

How reproducible:
-----------------

100%

Steps to Reproduce:
-------------------

1. Trigger rebalance
2. Stop the volume exported via Ganesha
3. Check showmount on localhots

Actual results:
---------------

The volume gets unexportd.

Expected results:
-----------------

Volume should not get unexported.

Additional info:
----------------

More details in https://bugzilla.redhat.com/show_bug.cgi?id=1415630 .The issue was uncovered during that scenario.

Comment 4 Bhavana 2017-03-13 12:13:05 EDT

Hi Soumya,

I have edited the doc text for the release notes, but i need a little more clarity wrt the second sentence "the volume gets unexported in the node where the command is executed, but node still have volume being exported"

Comment 5 Soumya Koduri 2017-03-14 00:55:36 EDT

Hi Bhavana,

I made few updates to the doc text. Please check the same -

>>>
If "gluster volume stop" operation on a volume exported via NFS-ganesha server fails, there is a probability that the volume shall get unexported on few nodes in spite of the command failure. This shall lead to inconsistent state across the NFS-ganesha cluster.

Workaround: 
To restore the cluster back to normal state, perform the following -
* identify the nodes where in the volume got unexported
* re-export the volume manually using the below dbus command -

# dbus-send --print-reply --system --dest=org.ganesha.nfsd /org/ganesha/nfsd/ExportMgr org.ganesha.nfsd.exportmgr.AddExport string:/var/run/gluster/shared_storage/nfs-ganesha/exports/export.<volname>.conf string:"EXPORT(Path=/<volname>)"
<<<

Comment 6 Bhavana 2017-03-14 06:08:18 EDT

Thanks Soumya.

Slightly edited the doc text for the release notes.

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