Retrieve ilo drivers via webserver

This enables the ability to bypass the ilo driver
dependency on swift through implementation of support
for the 'use_http_web_server_for_images' variable
and corresponding logic to bypass swift tasks
when enabled

As per:
https://specs.openstack.org/openstack/ironic-specs/specs/4.2/remove-swift-dependency-for-ilo-drivers.html

Change-Id: I343c542dbb9b3a9fe17c364e827374b3512993f1

defaults/main.yml

@@ -112,6 +112,20 @@ ironic_service_role_name: "admin"
 ironic_service_in_ldap: False
 
 # Ironic image store information
+#
+### Hosted Web Server
+#
+# Set this to True to use http web server to host floppy
+# images and generated boot ISO. This requires http_root and
+# http_url to be configured in the [deploy] section of the
+# config file. If this is set to False, then Ironic will use
+# Swift to host the floppy images and generated boot_iso.
+ironic_enable_web_server_for_images: False
+ironic_http_url: null
+ironic_http_root: null
+#
+### Swift Config
+#
 ironic_swift_image_container: glance_images
 ironic_swift_api_version: v1
 ironic_swift_url_endpoint_type: swift

tasks/ironic_post_install.yml

@@ -24,6 +24,7 @@
   environment:
     OS_ENDPOINT_TYPE: internalURL
   when:
+    - not ironic_enable_web_server_for_images | bool
     - inventory_hostname == groups['ironic_all'][0]
     - not ironic_standalone | bool
   tags:
@@ -41,6 +42,7 @@
     OS_ENDPOINT_TYPE: internalURL
   register: swift_storage_url
   when:
+    - not ironic_enable_web_server_for_images | bool
     - (ironic_swift_auth_account is undefined) or (ironic_swift_endpoint is undefined)
     - not ironic_standalone | bool
   tags:
@@ -54,6 +56,7 @@
       variables are undefined. Ensure swift is functional and/or define
       those variables.
   when:
+    - not ironic_enable_web_server_for_images | bool
     - (ironic_swift_auth_account is undefined) and (ironic_swift_endpoint is undefined)
     - not ironic_standalone | bool
     - not swift_storage_url.stdout
@@ -64,6 +67,7 @@
   set_fact:
     ironic_swift_auth_account: "{{ swift_storage_url.stdout.split('/v1/')[-1] }}"
   when:
+    - not ironic_enable_web_server_for_images | bool
     - ironic_swift_auth_account is undefined
     - not ironic_standalone | bool
   tags:
@@ -73,6 +77,7 @@
   set_fact:
     ironic_swift_endpoint: "{{ swift_storage_url.stdout.split('/v1/')[0] }}"
   when:
+    - not ironic_enable_web_server_for_images | bool
     - ironic_swift_endpoint is undefined
     - not ironic_standalone | bool
   tags:

templates/ironic.conf.j2

@@ -58,6 +58,10 @@ erase_devices_priority = {{ ironic_erase_devices_priority }}
 {% if not ironic_standalone | bool %}
 object_store_endpoint_type = {{ ironic_swift_url_endpoint_type }}
 {% endif %}
+{% if ironic_enable_web_server_for_images | bool %}
+http_root ={{ ironic_http_root }}
+http_url = {{ ironic_http_url }}
+{% endif %}
 
 [dhcp]
 dhcp_provider = {{ ironic_dhcp_provider }}
@@ -77,7 +81,7 @@ username = {{ ironic_glance_service_user_name }}
 user_domain_id = {{ ironic_glance_service_user_domain_id }}
 password = {{ glance_service_password }}
 glance_api_servers = {{ ironic_glance_api_servers }}
-{% if not ironic_standalone | bool %}
+{% if not ironic_standalone | bool and not ironic_enable_web_server_for_images | bool %}
 swift_temp_url_key = {{ ironic_swift_temp_url_secret_key }}
 swift_container = {{ ironic_swift_image_container }}
 swift_endpoint_url = {{ ironic_swift_endpoint }}
@@ -88,6 +92,9 @@ swift_api_version = {{ ironic_swift_api_version }}
 [iboot]
 
 [ilo]
+{% if ironic_enable_web_server_for_images | bool %}
+use_web_server_for_images = True
+{% endif %}
 
 [inspector]