Render {{ openstack_service_workers }} for workers
of each openstack service is not enough. There are
several services which has to have more workers because
there are more requests sent to them.

This patch is just adding default value for workers for
each service and sets {{ openstack_service_workers }} as
default, so value can be overrided in hostvars per server.
Nothing changed for normal user.

Change-Id: Ifa5863f8ec865bbf8e39c9b2add42c92abe40616

There are a few issues fixed here:

- The Barbican API service doesn't set a log file, so all the Barbican API
  service logs go to loadwsgi.py.log by default.
- The logs in loadwsgi.py.log are not ingested properly by Fluentd.
- uWSGI logs go to barbican-api.log. This would normally be used as the log
  file for the Barbican API service logs.

This patch makes the following changes to address the above issues:

- All uWSGI logs (from the Emperor and Vassals) go to barbican_api_uwsgi_access.log
  Although these logs aren't strictly all access logs, this follows the existing
  pattern for WSGI logs.
- The Barbican API service logs are written to barbican-api.log instead of
  loadwsgi.py.log. This follows the pattern used by other OpenStack services.
- Fluentd is configured to parse the Barbican API service logs as it would with
  other OpenStack Python services.

Change-Id: I6d03fa8c81c52b6f061514a836bbd15bb6639aaf
Closes-Bug: #1891343

backport: ussuri, train

Without this the container returns an empty response.

Change-Id: Ic36845f3fc625c080c92904b58ace070dd24fbb2
Closes-Bug: #1881784

This patch introduces an optional backend encryption for the Barbican
API service. When used in conjunction with enabling TLS for service API
endpoints, network communcation will be encrypted end to end, from
client through HAProxy to the Barbican service.

Change-Id: I62a43b36ebe4a03230bf944980b45e4b6938871b
Partially-Implements: blueprint add-ssl-internal-network

Introduce kolla_address filter.
Introduce put_address_in_context filter.

Add AF config to vars.

Address contexts:
- raw (default): <ADDR>
- memcache: inet6:[<ADDR>]
- url: [<ADDR>]

Other changes:

globals.yml - mention just IP in comment

prechecks/port_checks (api_intf) - kolla_address handles validation

3x interface conditional (swift configs: replication/storage)

2x interface variable definition with hostname
(haproxy listens; api intf)

1x interface variable definition with hostname with bifrost exclusion
(baremetal pre-install /etc/hosts; api intf)

neutron's ml2 'overlay_ip_version' set to 6 for IPv6 on tunnel network

basic multinode source CI job for IPv6

prechecks for rabbitmq and qdrouterd use proper NSS database now

MariaDB Galera Cluster WSREP SST mariabackup workaround
(socat and IPv6)

Ceph naming workaround in CI
TODO: probably needs documenting

RabbitMQ IPv6-only proto_dist

Ceph ms switch to IPv6 mode

Remove neutron-server ml2_type_vxlan/vxlan_group setting
as it is not used (let's avoid any confusion)
and could break setups without proper multicast routing
if it started working (also IPv4-only)

haproxy upgrade checks for slaves based on ipv6 addresses

TODO:

ovs-dpdk grabs ipv4 network address (w/ prefix len / submask)
not supported, invalid by default because neutron_external has no address
No idea whether ovs-dpdk works at all atm.

ml2 for xenapi
Xen is not supported too well.
This would require working with XenAPI facts.

rp_filter setting
This would require meddling with ip6tables (there is no sysctl param).
By default nothing is dropped.
Unlikely we really need it.

ironic dnsmasq is configured IPv4-only
dnsmasq needs DHCPv6 options and testing in vivo.

KNOWN ISSUES (beyond us):

One cannot use IPv6 address to reference the image for docker like we
currently do, see: https://github.com/moby/moby/issues/39033
(docker_registry; docker API 400 - invalid reference format)
workaround: use hostname/FQDN

RabbitMQ may fail to bind to IPv6 if hostname resolves also to IPv4.
This is due to old RabbitMQ versions available in images.
IPv4 is preferred by default and may fail in the IPv6-only scenario.
This should be no problem in real life as IPv6-only is indeed IPv6-only.
Also, when new RabbitMQ (3.7.16/3.8+) makes it into images, this will
no longer be relevant as we supply all the necessary config.
See: https://github.com/rabbitmq/rabbitmq-server/pull/1982

For reliable runs, at least Ansible 2.8 is required (2.8.5 confirmed
to work well). Older Ansible versions are known to miss IPv6 addresses
in interface facts. This may affect redeploys, reconfigures and
upgrades which run after VIP address is assigned.
See: https://github.com/ansible/ansible/issues/63227

Bifrost Train does not support IPv6 deployments.
See: https://storyboard.openstack.org/#!/story/2006689



Change-Id: Ia34e6916ea4f99e9522cd2ddde03a0a4776f7e2c
Implements: blueprint ipv6-control-plane
Signed-off-by: Radosław Piliszek <radoslaw.piliszek@gmail.com>

This allows barbican service endpoints to use custom hostnames, and adds the
following variables:

* barbican_internal_fqdn
* barbican_external_fqdn

These default to the old values of kolla_internal_fqdn or
kolla_external_fqdn.

This also adds a barbican_api_listen_port option, which defaults to
barbican_api_port for backward compatibility.

This option allow the user to differentiate between the port the
service listens on, and the port the service is reachable on. This is
useful for external load balancers which live on the same host as the
service itself.

Change-Id: I1807a9c8b64d737d0e278bb3e925fecb4fadfb08
Implements: blueprint service-hostnames

Useful api_interface_address variable has been define here:
https://github.com/openstack/kolla-ansible/blob/master/ansible/group_vars/all.yml#L57
In order to simplify codebase we must use it as much as possible.

Change-Id: I18fec19bf69e05a22a4142a9cd1165eccd022455

By default barbican uwsgi is configured to listen all address on host
[1], we need to change this to the ip address of the host.

[1]:
https://github.com/openstack/barbican/blob/master/etc/barbican/vassals/barbican-api.ini

Change-Id: I4a1f9fb44ad55caf21f82c1b6d272a9743d65fd8
Closes-bug: #1632177