Bug 869990

Summary:	[RHEV-H 6.4]cgconfig does not start with default configuration on RHEV-H.
Product:	Red Hat Enterprise Linux 6	Reporter:	haiyang,dong <hadong>
Component:	libcgroup	Assignee:	Peter Schiffer <pschiffe>
Status:	CLOSED ERRATA	QA Contact:	Mike Gahagan <mgahagan>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.4	CC:	acathrow, bsarathy, chchen, cshao, ddumas, gouyang, hadong, jboggs, jsafrane, kzhang, leiwang, mburns, ovirt-maint, tlavigne, varekova, ycui
Target Milestone:	rc	Keywords:	Patch, Regression
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	Cause: cgconfig service wasn't working properly with read-only file systems Consequence: cgconfig service wasn't able to start with default configuration on RHEV-H system Fix: added check for the read-only file systems to the cgconfig service Result: cgconfig service is working properly with default configuration on RHEV-H systems	Story Points:	---
Clone Of:
Clones:	870427 (view as bug list)		Environment:
Last Closed:	2013-02-21 10:47:28 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	870427, 888457

Description haiyang,dong 2012-10-25 10:04:03 UTC

Description of problem:
/etc/init.d/cgconfig does not work well:
report "Starting cgconfig service: Error: cannot create directory /cgroup/cpuset" by execute service start/restart

[root@localhost admin]# /etc/init.d/cgconfig start
Starting cgconfig service: Error: cannot create directory /cgroup/cpuset
Loading configuration file /etc/cgconfig.conf failed
Cgroup, operation not allowed
Failed to parse /etc/cgconfig.conf                         [FAILED]
[root@localhost admin]# /etc/init.d/cgconfig restart
Stopping cgconfig service:                                 [  OK  ]
Starting cgconfig service: Error: cannot create directory /cgroup/cpuset
Loading configuration file /etc/cgconfig.conf failed
Cgroup, operation not allowed
Failed to parse /etc/cgconfig.conf                         [FAILED]

[root@localhost admin]# chkconfig |grep cgconfig
cgconfig               0:off        1:off        2:on        3:on        4:on        5:on        6:off

so default this cgconfig service was on, but /etc/init.d/cgconfig does not work well

Version-Release number of selected component (if applicable):
rhev-hypervisor6-6.4-20121015.1.el6

How reproducible:
100%

  
Steps to Reproduce:

Actual result:

Expect result:

Additional info:
No this issue in rhev-hypervisor6-6.3-20121023.0.el6_3, so it's a regression bug 
from 6.3 into 6.4

Comment 3 Mike Burns 2012-10-25 13:41:59 UTC

Sounds like we need a new entry in rwtab, and possibly need to pre-create the directory.

Comment 5 RHEL Program Management 2012-10-26 00:40:42 UTC

This request was evaluated by Red Hat Product Management for
inclusion in a Red Hat Enterprise Linux release.  Product
Management has requested further review of this request by
Red Hat Engineering, for potential inclusion in a Red Hat
Enterprise Linux release for currently deployed products.
This request is not yet committed for inclusion in a release.

Comment 6 Mike Gahagan 2012-11-20 13:51:13 UTC

So just to get things straight, This looks like an artifact of / being mounted read-only in RHEV-H rather than a bug in libcgroup. I'm a bit confused because as as far as I know libcgroup has been using /cgroup since RHEL 6 was released so I don't think this is a regression. I suppose the default mount point could be changed to /sys/fs/cgroup but I don't know how disruptive that may be to existing configurations.

Comment 13 Mike Gahagan 2013-01-09 20:24:39 UTC

I have confirmed that cgconfig will now work with a mount point specified on a read-only fs. I think we can mark this one verified, but I would like to hear from the RHEV-H folks that it is working in their environment first.

Comment 16 Mike Gahagan 2013-01-09 21:14:08 UTC

The version tested in comment 13 was 0.37-7.el6.

Comment 18 errata-xmlrpc 2013-02-21 10:47:28 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-0452.html