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Bug 644525 - support for _rnetdev mount option missing in RHEL6
Summary: support for _rnetdev mount option missing in RHEL6
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: anaconda
Version: 6.1
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Chris Lumens
QA Contact: Release Test Team
URL:
Whiteboard:
Depends On: 644503
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-10-19 19:06 UTC by Dave Maley
Modified: 2018-10-27 11:30 UTC (History)
4 users (show)

Fixed In Version: anaconda-13.21.84-1
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-05-19 12:52:14 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2011:0530 0 normal SHIPPED_LIVE anaconda bug fix and enhancement update 2011-05-18 17:44:52 UTC

Description Dave Maley 2010-10-19 19:06:21 UTC 
Description of problem:
Start of kdump service fails in RHEL6 iSCSI boot environment.  The kdump
service starts successfully in RHEL5 when _rnetdev option is specified for
/boot in fstab.

The _rnetdev mount option was added in RHEL5.2 to address problems where the
iscsi root device never got fscked.  The _rnetdev support added to anaconda in
5.2 (bug 435716) is missing from anaconda in RHEL6.

I've located the commit which added _rnetdev in RHEL5:
http://git.fedorahosted.org/git/?p=anaconda.git;a=commit;h=bb093dbb064710cf99c6fd7eabb1e7eed5b4235b

..however the relevant code has changed significantly between RHEL5's anaconda and RHEL6 and I'm not familiar enough w/ it to port the patch.


Version-Release number of selected component (if applicable):
anaconda-13.21.82-1.el6


How reproducible:
always


Steps to Reproduce:
1. setup system w/ iSCSI boot environment
2. configure kdump (if not auto-enabled)
3. reboot (if crashkernel memory not already reserved)

  
Actual results:
kdump service fails to start


Expected results:
kdump service starts successfully


Additional info:
Comment 2 Dave Maley 2010-10-20 15:41:39 UTC 
note: the support for _rnetdev in anaconda was added to 5.2 in order to fix fsck on iscsi root devs (bug 435716).  However the customer who reported it against RHEL6 noticed it because it broke kdump in their iscsi boot environment.  I've updated the summary to (hopefully) more accurately describe this bug report.
Comment 3 Chris Lumens 2010-10-21 19:12:04 UTC 
The pre-RHEL6 commit that explicitly removed _rnetdev is:

commit 1edec1afdf9e98b912048f35c8da4970166e7c7f
Author: Hans de Goede <hdegoede>
Date:   Fri Mar 20 10:51:33 2009 +0100

    Do not use _rnetdev as fstab option for network based /
    
    In RHEL-5 we use _rnetdev for network based /, and various pieces
    of the RHEL-5 initscripts key of on this to do special things. So I thought
    it would be good to do the same in Fedora. Testing has revealed that
    Fedora's mount command cannot handle this options on things go boom,
    so use plain _netdev for / just like we do with other network based fs, and
    as we've been doing in previous Fedora releases.

Given that, can you confirm that adding _rnetdev works all the way through the bootup process, not just that kdump starts?  If so, it should be simple enough to revert this commit on rhel6-branch.
Comment 4 Dave Maley 2010-10-21 19:29:09 UTC 
Hi Chris - The mount support for _rnetdev got lost in the rhel/fedora shuffle (see bug 644503).  I'm fairly certain the customer verified kdump startup via a full reboot however I'll ask for confirmation ....
Comment 5 Dave Maley 2010-11-02 21:10:10 UTC 
Hi Chris - We've received confirmation from the customer that, w/ the _rnetdev mount support present (bug 644503), their system competes bootup successfully.

Cheers!
~Dave
Comment 6 RHEL Program Management 2010-11-15 23:49:31 UTC 
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.
Comment 11 Alexander Todorov 2011-04-05 12:37:22 UTC 
Tested with anaconda-13.21.109 and / on iSCSI. fstab contains the _rnetdev option and the system is able to fully boot into runlevel 3.
Comment 12 errata-xmlrpc 2011-05-19 12:52:14 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0530.html
Comment 13 errata-xmlrpc 2011-05-19 12:52:14 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0530.html
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