Comment 6 for bug 1635334

Reviewed: https://review.openstack.org/393343
Committed: https://git.openstack.org/cgit/openstack/puppet-tripleo/commit/?id=9e9b64be7a8aa48acf349e3769fd7e93577d1969
Submitter: Jenkins
Branch: stable/newton

commit 9e9b64be7a8aa48acf349e3769fd7e93577d1969
Author: Michele Baldessari <email address hidden>
Date: Fri Oct 21 10:02:39 2016 +0200

    Set redis file descriptor limit when run via pacemaker

    The current redis file descriptor limit is 4096 because of two reasons:
    - It is run via the redis user
    - It is not started via systemd which has explicit LimitNOFILE set to
      10240 (which matches the default configuration of maximum 10000
      clients)

    Create an /etc/security/limits.d/redis.conf file in order to increase
    the fd limit value With this change we correctly get the following
    limits:
    [root@overcloud-controller-0 ~]# pcs status |grep -A2 redis
     Master/Slave Set: redis-master [redis]
         Masters: [ overcloud-controller-2 ]
         Slaves: [ overcloud-controller-0 overcloud-controller-1 ]

    [root@overcloud-controller-0 ~]# cat /proc/`pgrep redis`/limits | grep open
    Max open files 10240 10240 files

    Previously this limit was set to 4096.

    Change-Id: I7691581bad92ad9442cecd82cf44f5ac78ed169f
    Closes-Bug: #1635334
    (cherry picked from commit 03a68a5c8cdbabcf6e152b9aca62f1007c713b5c)