Don't run baremetal compute tasks when ironic is disabled

This includes:
* Building and registering IPA images
* Registering a provisioning network
* Registering ironic inspector introspection rules
* Creating an inspection store container

ansible/group_vars/all/inspector

@@ -323,7 +323,7 @@ inspector_dell_switch_lldp_workaround_group:
 # data which may be useful in environments without Swift.
 
 # Whether the inspection data store is enabled.
-inspector_store_enabled: "{{ not kolla_enable_swift | bool }}"
+inspector_store_enabled: "{{ kolla_enable_ironic | bool and not kolla_enable_swift | bool }}"
 
 # Port on which the inspection data store should listen.
 inspector_store_port: 8080

ansible/kolla-openstack.yml

 ---
 
-- name: Ensure Ironic is enabled
+- name: Check whether Ironic is enabled
   hosts: controllers
   tasks:
     - name: Create controllers group with ironic enabled
@@ -146,17 +146,19 @@
               }}
           with_items: "{{ kolla_neutron_ml2_generic_switch_hosts }}"
 
-        - name: Set facts containing IPA kernel and ramdisk URLs
-          set_fact:
-            kolla_inspector_ipa_kernel_upstream_url: "{{ inspector_ipa_kernel_upstream_url }}"
-            kolla_inspector_ipa_ramdisk_upstream_url: "{{ inspector_ipa_ramdisk_upstream_url }}"
-          when: not ipa_build_images | bool
+        - block:
+            - name: Set facts containing IPA kernel and ramdisk URLs
+              set_fact:
+                kolla_inspector_ipa_kernel_upstream_url: "{{ inspector_ipa_kernel_upstream_url }}"
+                kolla_inspector_ipa_ramdisk_upstream_url: "{{ inspector_ipa_ramdisk_upstream_url }}"
+              when: not ipa_build_images | bool
 
-        - name: Set facts containing IPA kernel and ramdisk paths
-          set_fact:
-            kolla_inspector_ipa_kernel_path: "{{ image_cache_path }}/{{ ipa_image_name }}/{{ ipa_images_kernel_name }}"
-            kolla_inspector_ipa_ramdisk_path: "{{ image_cache_path }}/{{ ipa_image_name }}/{{ ipa_images_ramdisk_name }}"
-          when: ipa_build_images | bool
+            - name: Set facts containing IPA kernel and ramdisk paths
+              set_fact:
+                kolla_inspector_ipa_kernel_path: "{{ image_cache_path }}/{{ ipa_image_name }}/{{ ipa_images_kernel_name }}"
+                kolla_inspector_ipa_ramdisk_path: "{{ image_cache_path }}/{{ ipa_image_name }}/{{ ipa_images_ramdisk_name }}"
+              when: ipa_build_images | bool
+          when: kolla_enable_ironic | bool
       tags:
         - config
   roles:

ansible/overcloud-introspection-rules-dell-lldp-workaround.yml

@@ -8,8 +8,16 @@
 # each ironic node that matches against the switch system and the relevant
 # interface name, then sets the node's name appropriately.
 
-- name: Group controller hosts in systems requiring the workaround
+- name: Check whether Ironic is enabled
   hosts: controllers
+  tasks:
+    - name: Create controllers group with ironic enabled
+      group_by:
+        key: "controllers_with_ironic_enabled_{{ kolla_enable_ironic }}"
+
+- name: Group controller hosts in systems requiring the workaround
+  hosts: controllers_with_ironic_enabled_True
+  gather_facts: False
   tasks:
     - name: Group controller hosts in systems requiring the Dell switch LLDP workaround
       group_by:
@@ -18,6 +26,7 @@
 - name: Ensure introspection rules for Dell switch LLDP workarounds are registered in Ironic Inspector
   # Only required to run on a single host.
   hosts: controllers_require_workaround_True[0]
+  gather_facts: False
   vars:
     all_switch_interfaces: []
     ironic_inspector_rules: []

ansible/overcloud-introspection-rules.yml

 ---
+- name: Check whether Ironic is enabled
+  hosts: controllers
+  tasks:
+    - name: Create controllers group with ironic enabled
+      group_by:
+        key: "controllers_with_ironic_enabled_{{ kolla_enable_ironic }}"
+
 - name: Ensure introspection rules are registered in Ironic Inspector
   # Only required to run on a single host.
-  hosts: controllers[0]
+  hosts: controllers_with_ironic_enabled_True[0]
+  gather_facts: False
   vars:
     venv: "{{ virtualenv_path }}/shade"
   pre_tasks:

ansible/overcloud-ipa-build.yml

@@ -4,8 +4,16 @@
 #
 # The images will be stored in {{ image_cache_path }}/{{ ipa_image_name }}.
 
+- name: Check whether Ironic is enabled
+  hosts: controllers
+  tasks:
+    - name: Create controllers group with ironic enabled
+      group_by:
+        key: "controllers_with_ironic_enabled_{{ kolla_enable_ironic }}"
+
 - name: Ensure Ironic Python Agent images are built and installed
-  hosts: controllers[0]
+  hosts: controllers_with_ironic_enabled_True[0]
+  gather_facts: False
   vars:
     ipa_image_name: "ipa"
   tasks:

ansible/overcloud-ipa-images.yml

 ---
+- name: Check whether Ironic is enabled
+  hosts: controllers
+  tasks:
+    - name: Create controllers group with ironic enabled
+      group_by:
+        key: "controllers_with_ironic_enabled_{{ kolla_enable_ironic }}"
+
 - name: Ensure Ironic Python Agent (IPA) images are downloaded and registered
-  hosts: controllers[0]
+  hosts: controllers_with_ironic_enabled_True[0]
+  gather_facts: False
   vars:
     # These are the filenames generated by overcloud-ipa-build.yml.
     ipa_image_name: "ipa"

ansible/provision-net.yml

 ---
+- name: Check whether Ironic is enabled
+  hosts: controllers
+  tasks:
+    - name: Create controllers group with ironic enabled
+      group_by:
+        key: "controllers_with_ironic_enabled_{{ kolla_enable_ironic }}"
+
 - name: Ensure provisioning network and subnet are registered in neutron
   # Only required to run on a single host.
-  hosts: controllers[0]
+  hosts: controllers_with_ironic_enabled_True[0]
+  gather_facts: False
   pre_tasks:
     - name: Validate OpenStack password authentication parameters
       fail: