[JIRA] (OVIRT-1550) Configure and monitor nofiles on Jenkins

[Barak Korren (oVirt JIRA)]

Barak Korren created OVIRT-1550:
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             Summary: Configure and monitor nofiles on Jenkins
                 Key: OVIRT-1550
                 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1550
             Project: oVirt - virtualization made easy
          Issue Type: Improvement
          Components: oVirt CI
            Reporter: Barak Korren
            Assignee: infra
            Priority: High


We had an issue today (Jul 25th, 2017) of Jenkins running out of file descriptors.

Things already reached the point where Jenkins was barely functioning so to get things back to working order I've:
* Manually added a line in '{{/etc/security/limits.conf}}' to set 'nofiles' to 16384 for the 'jenkins' user (Previously it was just not configured and seems to have defaulted to 4096).
* Restarted the 'jenkins' service.

We now need to:
* Place this configuration in Puppet/Ansible.
* Add monitoring so we'll know in advance the next time Jenkins goes near to the nofiles limit.



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