Add support for Keepalived VRRP health check

[OpenStack Infra]

https://review.openstack.org/273546
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/neutron" is set up so that we directly report the documentation bugs against it. If this needs changing, the docimpact-group option needs to be added for the project. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

commit 185d6cbc648fd041402a5034b04b818da5c7136e
Author: Lubosz Kosnik <email address hidden>
Date: Thu Jan 28 14:44:00 2016 +0100

    Add support for Keepalived VRRP health check

    Adds functionality to generate bash script which verifies health of current
    keepalived instance by pinging all available and configured GW addresses.
    This functionality supports IPv4 and IPv6 by detecting needed ping version
    using netaddr.

    DocImpact:
    Added a new parameter to 'l3_agent.ini' named
    'ha_vrrp_health_check_interval' which is by default set to 0 (disabled).
    Values > 0 designate health check functionality should be enabled.
    Requires allowed ICMP ECHO_REQUEST because that is disabled by default.

    Co-Authored-By: Artur Korzeniewski <email address hidden>
    Change-Id: Ib4d0691f432830357ea3f113036719645bc59a62
    Closes-Bug: #1365461

[Alexandra Settle (alexandra-settle)]

    DocImpact:
    Added a new parameter to 'l3_agent.ini' named
    'ha_vrrp_health_check_interval' which is by default set to 0 (disabled).
    Values > 0 designate health check functionality should be enabled.
    Requires allowed ICMP ECHO_REQUEST because that is disabled by default.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/430233

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/430233
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=86fde4cfb267f1d9c22b24d30d916c38f58556e9
Submitter: Jenkins
Branch: master

commit 86fde4cfb267f1d9c22b24d30d916c38f58556e9
Author: John Davidge <email address hidden>
Date: Tue Feb 7 12:53:09 2017 +0000

    [networking] keepalived vrrp health check

    Document the purpose and configuration of the keepalived vrrp health
    check script.

    Change-Id: Ie51cdac2ea18a277bdf33b975c9e3839e7163764
    Closes-Bug: #1661703

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/openstack-manuals 15.0.0 release.