ipv6 does not work on centos 7

[Radosław Piliszek]

This is CentOS 7 Train

single-node fails at rabbitmq connecting to epmd

multi-node fails at mariadb (so earlier than single-node) connecting gcomm for wsrep

smaller issues:
CI needs longer dad wait than Ubuntu or Debian
INPUT ip6tables chain is never hit for vxlan0

[Radosław Piliszek (yoctozepto)]

both need an upgrade - will happen in Ussuri with CentOS 8

[Radosław Piliszek (yoctozepto)]

Smaller issues stay with us but they are not important outside the CI.

The others were fixed/workarounded by contributions from 99cloud:
rmq - https://review.opendev.org/699458
maria - https://review.opendev.org/699172

I will issue a releasenote and update the docs.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/701204

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/701204
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=8ac5ecb295bea8c437d37b1127682b31563dafe5
Submitter: Zuul
Branch: master

commit 8ac5ecb295bea8c437d37b1127682b31563dafe5
Author: Radosław Piliszek <email address hidden>
Date: Mon Jan 6 11:52:28 2020 +0100

    CentOS 7 IPv6 doc changes

    It advertises C7 as an IPv6-compatible platform.
    This is possible thanks to fixes in [1] and [2].

    [1] https://review.opendev.org/699458
    aka 7054b27dbb8bc893c50f66b492b7e14e5bc92237
    [2] https://review.opendev.org/699172
    aka 908bffcfc2950e271fee1af24fb174fa6bee4aff

    Change-Id: Ia353a1663a16f48ac83e5ee9a2cf1d6e183ac3a3
    Closes-bug: #1848444
    Closes-bug: #1848452
    Related-bug: #1856532
    Related-bug: #1856725

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/train
Review: https://review.opendev.org/701347

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/701347
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=0a94a111a9e96d3c89831ab44eee36933a9b3c22
Submitter: Zuul
Branch: stable/train

commit 0a94a111a9e96d3c89831ab44eee36933a9b3c22
Author: Radosław Piliszek <email address hidden>
Date: Mon Jan 6 11:52:28 2020 +0100

    CentOS 7 IPv6 doc changes

    It advertises C7 as an IPv6-compatible platform.
    This is possible thanks to fixes in [1] and [2].

    [1] https://review.opendev.org/699458
    aka 7054b27dbb8bc893c50f66b492b7e14e5bc92237
    [2] https://review.opendev.org/699172
    aka 908bffcfc2950e271fee1af24fb174fa6bee4aff

    Change-Id: Ia353a1663a16f48ac83e5ee9a2cf1d6e183ac3a3
    Closes-bug: #1848444
    Closes-bug: #1848452
    Related-bug: #1856532
    Related-bug: #1856725
    (cherry picked from commit 8ac5ecb295bea8c437d37b1127682b31563dafe5)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/kolla-ansible 9.0.1 release.