I've uploaded fixes to the SRU queue for Trusty and Utopic, thanks!
** Changed in: rsyslog (Ubuntu Trusty)
Status: Triaged => In Progress
** Changed in: rsyslog (Ubuntu Trusty)
Assignee: (unassigned) => Brian Murray (brian-murray)
** Changed in: rsyslog (Ubuntu Utopic)
Status: Triaged => In Progress
** Changed in: rsyslog (Ubuntu Utopic)
Assignee: (unassigned) => Brian Murray (brian-murray)
** Description changed:
+ Test Case
+ ---------
+ * Install rsyslog 7.4.4-1ubuntu2.1 on an Ubuntu system that runs inside an
OpenVZ container (If necessary, use ProxMox to quickly establish an OpenVZ
container environment)
+ * Verify that '$KLogPermitNonKernelFacility on' is set in /etc/rsyslog.conf
+ * Restart rsyslog to make sure any changes to the binaries/config are picked
up
+ * Run 'top' and observe that the rsyslogd process is running at 100% CPU.
When working properly, the rsyslogd process should generally be idle.
+
+ ---------------------------------------------------------------------
+
After updating rsyslog from 7.4.4-1ubuntu2 to 7.4.4-1ubuntu2.1 the rsyslogd
process started to take all the CPU on my machine.
The modification made by this release is described in #1274444, it is the
activation of KLogPermitNonKernelFacility option.
I don't know exactly the effect of this option but it seems to have a
permanent effect : even after downgrading the package or manually removing the
option from /etc/rsyslog.conf the issue remains.
My syslog is full of :
Sep 8 10:28:40 sentry rsyslogd: imklog: error reading kernel log - shutting
down: Bad file descriptor
Sep 8 10:28:40 sentry rsyslogd: message repeated 498 times: [imklog: error
reading kernel log - shutting down: Bad file descriptor]
Sep 8 10:28:46 sentry rsyslogd-2177: rsyslogd[internal_messages]: 519517
messages lost due to rate-limiting
I guess this is what causes the CPU load.
I am running Ubuntu 14.04.1 LTS in an OpenVZ container on Proxmox 3.2. The
kernel is 2.6.32-28-pve
---
ApportVersion: 2.14.1-0ubuntu3.3
- Architecture: amd64
- DistroRelease: Ubuntu 14.04
+ Architecture: amd64DistroRelease: Ubuntu 14.04
Package: rsyslog 7.4.4-1ubuntu2.1
PackageArchitecture: amd64
Tags: trusty
Uname: Linux 2.6.32-28-pve x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
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https://bugs.launchpad.net/bugs/1366829
Title:
7.4.4-1ubuntu2.1 makes rsyslogd to take all the CPU in OpenVZ
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