Bug 1324594

Summary: keepalived high number of close syscalls
Product: Red Hat Enterprise Linux 7 Reporter: Ryan Howe <rhowe>
Component: keepalivedAssignee: Ryan O'Hara <rohara>
Status: CLOSED ERRATA QA Contact: Brandon Perkins <bperkins>
Severity: high Docs Contact:
Priority: high    
Version: 7.2CC: aos-bugs, bmchugh, cluster-maint, csochin, dlbewley, erich, jruemker, nkim, rhowe, rmanes, rohara
Target Milestone: rcKeywords: ZStream
Target Release: 7.2   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: keepalived-1.3.4-1.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1429880 (view as bug list) Environment:
Last Closed: 2017-08-01 19:36:38 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:
Bug Depends On: 1419049    
Bug Blocks: 1394959, 1429880    

Description Ryan Howe 2016-04-06 17:53:53 UTC 
Description of problem:

keepalived is generating a high number of close syscalls, when a third party agent never drops close events and processing this amount of events is causing the high CPU usage and node to crash


Version-Release number of selected component (if applicable):
Openshift 3.1.1.6
keepalived-1.2.13-7.el7.x86_64

How reproducible: Have not reproduced, with 3rd party application.   



Steps to Reproduce:
1.Configure Ipfailover on openshift
2.Configure 3rd party sysdig to openshift

Actual results:
Openshift node crashes 

Expected results:
keepalived to not generate as many syscalls


Additional info:

OpenShift User list
http://lists.openshift.redhat.com/openshift-archives/users/2016-April/msg00045.html

Customer is running sysdig 
http://www.sysdig.org/


http://www.keepalived.org/changelog.html
 keepalived 1.2.20

"Optimise closure of fds before invoking scripts.
  Every time before a script was invoked, closeall() was called,
  which would spin through 1024 file descriptors closing them, even
  though the vast majority were not open, resulting in 1024 system
  calls. To avoid that, open all sockets and file descriptors
  (except fd 0/1/2) with the CLOEXEC flag set, so that the fds will
  be closed by the kernel when the script is exec'd."
Comment 1 Ryan O'Hara 2016-04-11 15:32:04 UTC 
Shouldn't the component for this be keepalived?

The patch in question is upstream commit 480b451a6fb98ee1c1476c3478e366666f87fe15.
Comment 31 errata-xmlrpc 2017-08-01 19:36:38 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.

https://access.redhat.com/errata/RHBA-2017:2169