Gate bundles allocate too little memory for the octavia unit

[Frode Nordahl]

As detailed by the build artifacts of the gate failures in https://review.opendev.org/#/c/744402/ the octavia units go OOM while running in the gate.

What happens is that the policyd functional test add/remove policy file resources, and juju's behavior for handling that is to run a upgrade-charm hook.

The Octavia charm is using the reactive framework, and a upgrade-charm event for a reactive charm means rebuilding the charms wheelhouse.

Rebuilding a charms wheelhouse some times means compiling binary code, and is this instance there just is not enough memory to do it because of all the services running etc.

[Frode Nordahl (fnordahl)]

https://review.opendev.org/#/c/751663/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/751663
Committed: https://git.openstack.org/cgit/openstack/charm-octavia/commit/?id=6e5f83571ca6b63af734990c978a2284fb70e8a4
Submitter: Zuul
Branch: master

commit 6e5f83571ca6b63af734990c978a2284fb70e8a4
Author: Frode Nordahl <email address hidden>
Date: Mon Sep 14 10:25:19 2020 +0200

    Increase available cores and memory for octavia unit

    The charm Octavia gate job has started to OOM for the Octavia
    units as detailed on the bug.

    This change addresses both that issue and attempts to increase the
    velocity of the test by adding CPU cores which might help for the
    time it takes to compile binary dependencies on initial deploy
    and during the policyd tests.

    Note that instead of explicitly mentioning amount of memory we
    assume a flavor with more cores to also have more memory.

    Func-Test-Pr: https://github.com/openstack-charmers/zaza-openstack-tests/pull/418
    Change-Id: I0f332c5f6d97ed99f59c9985ff4a033920708bf2
    Closes-Bug: #1895319

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/20.08
Review: https://review.opendev.org/758134

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/758134
Committed: https://git.openstack.org/cgit/openstack/charm-octavia/commit/?id=30543ac39be973d32407acfa2153aae924873629
Submitter: Zuul
Branch: stable/20.08

commit 30543ac39be973d32407acfa2153aae924873629
Author: Frode Nordahl <email address hidden>
Date: Mon Sep 14 10:25:19 2020 +0200

    Increase available cores and memory for octavia unit

    The charm Octavia gate job has started to OOM for the Octavia
    units as detailed on the bug.

    This change addresses both that issue and attempts to increase the
    velocity of the test by adding CPU cores which might help for the
    time it takes to compile binary dependencies on initial deploy
    and during the policyd tests.

    Note that instead of explicitly mentioning amount of memory we
    assume a flavor with more cores to also have more memory.

    Func-Test-Pr: https://github.com/openstack-charmers/zaza-openstack-tests/pull/418
    Change-Id: I0f332c5f6d97ed99f59c9985ff4a033920708bf2
    Closes-Bug: #1895319
    (cherry picked from commit 6e5f83571ca6b63af734990c978a2284fb70e8a4)