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Bug 1101151

Summary:

cgroup_controllers in qemu.conf doesn't take effect

Product:

Red Hat Enterprise Linux 6

Reporter:

Jincheng Miao <jmiao>

Component:

libvirt

Assignee:

Jiri Denemark <jdenemar>

Status:

CLOSED WONTFIX

QA Contact:

Virtualization Bugs <virt-bugs>

Severity:

medium

Docs Contact:

Priority:

unspecified

Version:

6.5

CC:

acathrow, dyuan, honzhang, jdenemar, jmiao, mzhan

Target Milestone:

Target Release:

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Hardware:

x86_64

OS:

Linux

Whiteboard:

Fixed In Version:

Doc Type:

Bug Fix

Doc Text:

Story Points:

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Clone Of:

Environment:

Last Closed:

2014-06-05 12:05:47 UTC

Type:

Bug

Regression:

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Mount Type:

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Documentation:

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CRM:

Verified Versions:

Category:

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oVirt Team:

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RHEL 7.3 requirements from Atomic Host:

Cloudforms Team:

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Target Upstream Version:

Embargoed:

Attachments:

Description	Flags
the log of cgroup controllers detection in libvirtd	none

Description Jincheng Miao 2014-05-26 10:03:59 UTC

Description of problem:
cgroup_controllers in qemu.conf doesn't take effect.

Version-Release number of selected component (if applicable):
libvirt-0.10.2-36.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. trying to uncomment cgroup_controllers, and remove one controller, eg: cpuset
# vim /etc/libvirt/qemu.conf
...
#cgroup_controllers = [ "cpu", "devices", "memory", "blkio", "cpuset", "cpuacct" ]
cgroup_controllers = [ "cpu", "devices", "memory", "blkio", "cpuacct" ]
...

2. reboot libvirtd
# service libvirtd restart

3. check the log message:
2014-05-22 08:20:43.415+0000: 54309: debug : lxcContainerAvailable:2017 : container support is enabled
2014-05-22 08:20:43.415+0000: 54309: debug : virCgroupNew:617 : New group /
2014-05-22 08:20:43.415+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 0:cpu at /cgroup/cpu in 
2014-05-22 08:20:43.415+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 1:cpuacct at /cgroup/cpuacct in 
2014-05-22 08:20:43.415+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 2:cpuset at /cgroup/cpuset in 
2014-05-22 08:20:43.415+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 3:memory at /cgroup/memory in 
2014-05-22 08:20:43.415+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 4:devices at /cgroup/devices in 
2014-05-22 08:20:43.415+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 5:freezer at /cgroup/freezer in 
2014-05-22 08:20:43.415+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 6:blkio at /cgroup/blkio in 
2014-05-22 08:20:43.415+0000: 54309: debug : virCgroupNew:617 : New group /libvirt
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 0:cpu at /cgroup/cpu in 
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 1:cpuacct at /cgroup/cpuacct in 
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 2:cpuset at /cgroup/cpuset in 
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 3:memory at /cgroup/memory in 
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 4:devices at /cgroup/devices in 
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 5:freezer at /cgroup/freezer in 
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupDetect:273 : Detected mount/mapping 6:blkio at /cgroup/blkio in 
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupMakeGroup:535 : Make group /libvirt
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpu/libvirt/
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpuacct/libvirt/
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpuset/libvirt/
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupMakeGroup:560 : Make controller /cgroup/memory/libvirt/
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupMakeGroup:560 : Make controller /cgroup/devices/libvirt/
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupMakeGroup:560 : Make controller /cgroup/freezer/libvirt/
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupMakeGroup:560 : Make controller /cgroup/blkio/libvirt/


we can see the line:
"
2014-05-22 08:20:43.416+0000: 54309: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpuset/libvirt/
"

Expected result:
if a controller is not enabled in cgroup_controllers, libvirtd should make '/libvirt' under this controller

Comment 1 Jiri Denemark 2014-05-26 11:08:31 UTC

Could you provide a complete libvirtd.log showing libvirtd's start? It's likely that these messages are coming from lxc driver, which is not controlled by anything in qemu.conf.

Comment 2 Jincheng Miao 2014-05-27 02:43:08 UTC

(In reply to Jiri Denemark from comment #1)
> Could you provide a complete libvirtd.log showing libvirtd's start? It's
> likely that these messages are coming from lxc driver, which is not
> controlled by anything in qemu.conf.

Sorry, I pasted lxc log, and the qemu log should be:
2014-05-27 03:39:08.962+0000: 29569: debug : virCgroupNew:617 : New group /
2014-05-27 03:39:08.966+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 0:cpu at /cgroup/cpu in 
2014-05-27 03:39:08.966+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 1:cpuacct at /cgroup/cpuacct in 
2014-05-27 03:39:08.966+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 2:cpuset at /cgroup/cpuset in 
2014-05-27 03:39:08.966+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 3:memory at /cgroup/memory in 
2014-05-27 03:39:08.966+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 4:devices at /cgroup/devices in 
2014-05-27 03:39:08.966+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 5:freezer at /cgroup/freezer in 
2014-05-27 03:39:08.966+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 6:blkio at /cgroup/blkio in 
2014-05-27 03:39:08.966+0000: 29569: debug : virCgroupNew:617 : New group /libvirt
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 0:cpu at /cgroup/cpu in 
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 1:cpuacct at /cgroup/cpuacct in 
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 2:cpuset at /cgroup/cpuset in 
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 3:memory at /cgroup/memory in 
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 4:devices at /cgroup/devices in 
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 5:freezer at /cgroup/freezer in 
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 6:blkio at /cgroup/blkio in 
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupMakeGroup:535 : Make group /libvirt
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpu/libvirt/
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpuacct/libvirt/
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpuset/libvirt/
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/memory/libvirt/
2014-05-27 03:39:08.967+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/devices/libvirt/
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/freezer/libvirt/
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/blkio/libvirt/
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupNew:617 : New group /libvirt/qemu
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 0:cpu at /cgroup/cpu in 
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 1:cpuacct at /cgroup/cpuacct in 
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 2:cpuset at /cgroup/cpuset in 
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 3:memory at /cgroup/memory in 
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 4:devices at /cgroup/devices in 
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 5:freezer at /cgroup/freezer in 
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupDetect:273 : Detected mount/mapping 6:blkio at /cgroup/blkio in 
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:535 : Make group /libvirt/qemu
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpu/libvirt/qemu/
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpuacct/libvirt/qemu/
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/cpuset/libvirt/qemu/
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/memory/libvirt/qemu/
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/devices/libvirt/qemu/
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/freezer/libvirt/qemu/
2014-05-27 03:39:08.968+0000: 29569: debug : virCgroupMakeGroup:560 : Make controller /cgroup/blkio/libvirt/qemu/

The completed log is the attachment.

Comment 3 Jincheng Miao 2014-05-27 02:47:25 UTC

Created attachment 899365 [details]
the log of cgroup controllers detection in libvirtd

Comment 4 Jiri Denemark 2014-06-05 12:00:59 UTC

This is already fixed upstream and in RHEL-7. The patches are not backportable to RHEL-6 because they involve changing the directory structure libvirt creates inside each cgroup. Moreover this bug shouldn't cause any harm and we can safely keep the current behavior in RHEL-6.

Comment 5 RHEL Program Management 2014-06-05 12:05:47 UTC

Development Management has reviewed and declined this request.
You may appeal this decision by reopening this request.