openstack/kolla-ansible
Code Issues Proposed changes

Reno follow up for docker_disable_ip_forward

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Follow up to I5129136c066489fdfaa4d93741c22e5010b7e89d, adding upgrade
notes.

Related-Bug: #1931615
Change-Id: I2f88b8fc2c6924de9f6bc1840b183ee024c5c1e9
This commit is contained in:
Mark Goddard 2021-06-15 09:49:38 +01:00
parent 3675b442c9
commit 3f9662278c
1 changed files with 15 additions and 0 deletions
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15
releasenotes/notes/docker-disable-ip-forward-b0490b71f9f07cd6.yaml
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@ -7,3 +7,18 @@ fixes:
``net.ipv4.ip_forward`` sysctl to ``1``. ``net.ipv4.ip_forward`` sysctl to ``1``.
This is to protect from creating all-forwarding hosts. This is to protect from creating all-forwarding hosts.
`LP#1931615 <https://launchpad.net/bugs/1931615>`__ `LP#1931615 <https://launchpad.net/bugs/1931615>`__
upgrade:
- |
Adds a new flag, ``docker_disable_ip_forward``, which
defaults to ``docker_disable_default_iptables_rules`` and is used to
disable docker's ``ip-forward`` option which makes docker set
``net.ipv4.ip_forward`` sysctl to ``1``. By default,
``docker_disable_default_iptables_rules`` is ``true``, in which case
docker's ``ip-forward`` option is ``disabled``.
For existing hosts, this configuration change is applied when configuring
docker via ``kolla-ansible bootstrap-servers``. Docker changes the sysctl
in a non-persistent manner, so it will revert to the default of ``0`` after
a reboot, if not configured elsewhere. This should not cause a problem,
since Kolla Ansible applies the sysctl where necessary. Operators may wish
to perform a proactive reboot, or apply the default through other means.