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Bug 703435

Summary:	NFS Kdump configuration create /var/crash/var/crash directory on kdump server
Product:	Red Hat Enterprise Linux 6	Reporter:	Guohua Ouyang <gouyang>
Component:	ovirt-node	Assignee:	Joey Boggs <jboggs>
Status:	CLOSED NOTABUG	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	low	Docs Contact:
Priority:	low
Version:	6.1	CC:	apevec, leiwang, moli, ovirt-maint, ycui
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-08-09 08:44:31 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Guohua Ouyang 2011-05-10 10:44:20 UTC

Description of problem:
After configure nfs kdump server on rhevh, it created /var/crash/var/crash/ directory on kdump server and saved vmcore file to this directory.
It's better to use /var/crash/ and saved vmcore file to /var/crash/.


Version-Release number of selected component (if applicable):
rhev-hypervisor-6.1-20110506

How reproducible:
Always.

Steps to Reproduce:
1. configure nfs kdump server on rhevh
2. reboot
3. kdump service is starting, echo c>  /proc/sysrq-trigger

Actual results:
vmcore file is saved to /var/crash/var/crash/

Expected results:
vmcore file is saved to /var/crash/

Comment 1 Joey Boggs 2011-08-09 02:29:28 UTC

this is more a feature of kdump we can't necessarily change,  it will put the vmcore under <mountpoint>:/var/crash. To get it just under /var/crash we would need to set kdump to just /.   If / isn't exported on the nfs server it will fail. Exporting / over nfs isn't gonna be common if not a security issue, may just need to put a release note in and file a bug to put a hardcoded directory into kdump options.

Comment 2 Alan Pevec 2011-08-09 08:44:31 UTC

ok, this is even documented in man kdump.conf:
       net <nfs mount>
              Will      mount      fs     and     copy     /proc/vmcore     to
              <mnt>/var/crash/%HOST-%DATE/, supports DNS.  Note  that  a  fqdn
              should be used as the server name in the mount point