Disable ironic in the overcloud by default

Ironic is now disabled by default in the overcloud. This brings Kayobe's
default set of services into line with Kolla Ansible. For environments
using Ironic in the overcloud, set kolla_enable_ironic to true in
kolla.yml.

Story: 2008207
Task: 40991

Change-Id: I33eb4fa534847e199a599350b525d4762a2beaac

ansible/group_vars/all/kolla

@@ -494,7 +494,7 @@ kolla_enable_heat: "{{ kolla_enable_openstack_core | bool }}"
 kolla_enable_horizon: "{{ kolla_enable_openstack_core | bool }}"
 kolla_enable_influxdb: "{{ kolla_enable_monasca | bool or kolla_enable_cloudkitty | bool }}"
 kolla_enable_ironic_ipxe: "no"
-kolla_enable_ironic: "{{ kolla_enable_openstack_core | bool }}"
+kolla_enable_ironic: "no"
 kolla_enable_ironic_neutron_agent: "{{ kolla_enable_neutron | bool and kolla_enable_ironic | bool }}"
 kolla_enable_iscsid: "{{ (kolla_enable_cinder | bool and kolla_enable_cinder_backend_iscsi | bool) or kolla_enable_ironic | bool }}"
 kolla_enable_karbor: "no"

playbooks/kayobe-overcloud-base/overrides.yml.j2

@@ -25,6 +25,9 @@ pip_index_url: "http://{{ zuul_site_mirror_fqdn }}/pypi/simple"
 aio_bridge_ports:
   - dummy1
 
+# Enable ironic for testing baremetal compute.
+kolla_enable_ironic: true
+
 {% if tls_enabled %}
 kolla_enable_tls_external: "yes"
 kolla_enable_tls_internal: "yes"

playbooks/kayobe-overcloud-upgrade-base/overrides.yml.j2

@@ -26,3 +26,6 @@ pip_index_url: "http://{{ zuul_site_mirror_fqdn }}/pypi/simple"
 # are using for SSH to be removed. Use a dummy interface.
 aio_bridge_ports:
   - dummy1
+
+# Enable ironic for testing baremetal compute.
+kolla_enable_ironic: true

releasenotes/notes/default-disable-ironic-2c20b8a7e69f19c5.yaml

@@ -0,0 +1,7 @@
+---
+upgrade:
+  - |
+    Ironic is now disabled by default in the overcloud. This brings Kayobe's
+    default set of services into line with Kolla Ansible. For environments
+    using Ironic in the overcloud, set ``kolla_enable_ironic`` to ``true`` in
+    ``kolla.yml``.