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Bug 1693667

Summary: [OSP13]Default ulimit for nova-compute container is too low when ceph is used
Product: Red Hat OpenStack Reporter: Alex Stupnikov <astupnik>
Component: openstack-tripleo-heat-templatesAssignee: Martin Schuppert <mschuppe>
Status: CLOSED ERRATA QA Contact: Yogev Rabl <yrabl>
Severity: medium Docs Contact:
Priority: medium    
Version: 13.0 (Queens)CC: dh3, johfulto, jschluet, mburns, mschuppe, yrabl
Target Milestone: ---Keywords: Triaged, ZStream
Target Release: 13.0 (Queens)   
Hardware: All   
OS: All   
Whiteboard:
Fixed In Version: openstack-tripleo-heat-templates-8.3.1-6.el7ost Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of:
: 1700252 (view as bug list) Environment:
Last Closed: 2019-04-30 17:27:52 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: 1700252    

Description Alex Stupnikov 2019-03-28 12:47:33 UTC 
Description of problem:

Patch [1] was used to enforce new default ulimit for nova-compute container, it was set to 1024. Though it is possible to adjust this limit, it is still suboptimal for certain use cases: for example, when ceph is configured for ephemeral storage and every instance has a huge number of disks.

In such case default limit is wrong and we have to either adjust it manually using the doc, or change default value. I suggest to increase default value to 1048576 (was configured in RHOSP 12).

Symptom:

237794 <... socket resumed> )     = -1 EMFILE (Too many open files)


[1] https://review.openstack.org/#/c/560991/
Comment 6 errata-xmlrpc 2019-04-30 17:27:52 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-2019:0939