docker with iptables=false breaks building kolla containers on the undercloud

[Michele Baldessari]

Change I875fa14f7d810c7f0aba3b3a1b04b60a19470f0f 'Configure dockerd with --iptables=false' broke building kolla images on the undercloud.

The reason for this is the following:
- iptables=false makes sense on the overcloud where we are using net=host for our containers
- on the undercloud however, when we build a container with kolla it gets spawned without net=host and so it does need some custom docker NAT rules in order to reach the internet.

Kolla builds will fail trying to resolve repos (DNS/http/any traffic won't make it to any external network).

The change in question is likely fine for the overcloud, but am not sure we really want it for the undercloud.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/491824

[OpenStack Infra (hudson-openstack)]

Change abandoned by Alex Schultz (<email address hidden>) on branch: master
Review: https://review.openstack.org/491824
Reason: Need to clear out the queue as this is going to fail. Will restore momentarily

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/491824
Committed: https://git.openstack.org/cgit/openstack/instack-undercloud/commit/?id=63ff236ecadc014e247cfd72fdb43344467efbf7
Submitter: Jenkins
Branch: master

commit 63ff236ecadc014e247cfd72fdb43344467efbf7
Author: Michele Baldessari <email address hidden>
Date: Tue Aug 8 16:22:39 2017 +0200

    Remove docker --iptables=false on the undercloud

    Change I875fa14f7d810c7f0aba3b3a1b04b60a19470f0f 'Configure dockerd with
    --iptables=false' broke building kolla images on the undercloud.

    The reason for this is the following: - iptables=false makes sense on
    the overcloud where we are using net=host for our containers - on the
    undercloud however, when we build a container with kolla it gets spawned
    without net=host and so it does need some custom docker NAT rules in
    order to reach the internet.

    Kolla builds will fail trying to resolve repos (DNS/http/any traffic
    won't make it to any external network).

    Change-Id: Id0984a047e51f6e0ab198ded225e6811f91420ac
    Closes-Bug: #1709325

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/instack-undercloud 7.3.0 release.