kernel.pid_max is too low for Ceph deployments using many OSDs

[Giulio Fidente]

In our OSP10d deployed test-bed [21 computes backed by 1043 Ceph OSDs], the compute node kernel.pid_max is set to 49152 but ceph (especially with a large number of OSDs) can consume far more than this for thread count.

More at https://bugzilla.redhat.com/show_bug.cgi?id=1389502

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/393682

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/393682
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=69be131d4075e5347b18c342b4de4fb503de39a5
Submitter: Jenkins
Branch: master

commit 69be131d4075e5347b18c342b4de4fb503de39a5
Author: Giulio Fidente <email address hidden>
Date: Fri Nov 4 11:12:43 2016 +0100

    Defaults kernel.pid_max to 1048576

    In some scenarios we reach the kernel.pid_max value, this change
    adds a parameter to the Kernel service for configuration of the
    sysctl key and defaults it to 1048576.

    Change-Id: Id8f3e6b7ed9846022898d7158fe9180418847085
    Closes-Bug: #1639191

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/newton
Review: https://review.openstack.org/395608

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/395608
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=9de1e2250ff67c5d8fab77e5ca60e2a27e060f2d
Submitter: Jenkins
Branch: stable/newton

commit 9de1e2250ff67c5d8fab77e5ca60e2a27e060f2d
Author: Giulio Fidente <email address hidden>
Date: Fri Nov 4 11:12:43 2016 +0100

    Defaults kernel.pid_max to 1048576

    In some scenarios we reach the kernel.pid_max value, this change
    adds a parameter to the Kernel service for configuration of the
    sysctl key and defaults it to 1048576.

    Change-Id: Id8f3e6b7ed9846022898d7158fe9180418847085
    Closes-Bug: #1639191
    (cherry picked from commit 69be131d4075e5347b18c342b4de4fb503de39a5)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/tripleo-heat-templates 6.0.0.0b1 development milestone.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/tripleo-heat-templates 5.2.0 release.