Ironic Inspector - disjoint ip range(s) for HA

Allow tht parameter IronicInspectorSubnets to specify
per-instance ip range(s) using hostname as key for each
list of ip ranges. For HA deployments use disjoint
address pools to avoid potential address conflict.

Implements: blueprint ironic-inspector-overcloud
Depends-On: Ifae513265b8c35d98012f14f951bac33ae90b66c
Change-Id: Ifdebe9fcc817b4572f1eb461a3396af6b55f1e6b

puppet/services/ironic-inspector.yaml

@@ -106,6 +106,25 @@ parameters:
                    netmask: 255.255.255.0
                    gateway: 192.168.1.254
                    tag: subnet1
+
+        NOTE: For HA deployments use disjoint address pools to avoid potential
+              address conflict. Use the hostname (short form) of each instance
+              that will run Ironic Inspector and define a dictionary with the
+              disjoint ip ranges.
+
+        Example HA deployment using disjoint address pools:
+                 overcloud-ironic-0:
+                   - ip_range: 192.168.24.100,192.168.24.119
+                   - ip_range: 192.168.25.100,192.168.25.119
+                     netmask: 255.255.255.0
+                     gateway: 192.168.25.254
+                     tag: subnet1
+                 overcloud-ironic-1:
+                   - ip_range: 192.168.24.120,192.168.24.139
+                   - ip_range: 192.168.25.120,192.168.25.139
+                     netmask: 255.255.255.0
+                     gateway: 192.168.25.254
+                     tag: subnet1
     type: json
     default: {}
   IronicInspectorUseSwift:
@@ -152,7 +171,7 @@ outputs:
                    "%{hiera('$NETWORK')}"
                  params:
                    $NETWORK: {get_param: [ServiceNetMap, IronicInspectorNetwork]}
-            ironic::inspector::dnsmasq_ip_subnets:
+            tripleo::profile::base::ironic_inspector::inspection_subnets:
               if:
               - ironic_inspection_subnets_not_set
               - [{ip_range: {get_param: IronicInspectorIpRange}}]

releasenotes/notes/ironic-inspector-disjoint-inspection-ip-range-f399a938d50daadd.yaml

@@ -0,0 +1,25 @@
+---
+features:
+  - |
+    Adds support to configure disjoint address pools for Ironic Inspector.
+
+    When Inspector is deployed as a HA service disjoint address pools should be
+    served by the DHCP instances to avoid address conflict issues. The disjoint
+    address pools are configured by using hostname (short form) as the key,
+    then pass the list of ranges for each host. For example::
+
+      parameter_defaults:
+
+        IronicInspectorSubnets:
+          overcloud-ironic-0:
+            - ip_range: 192.168.24.100,192.168.24.119
+            - ip_range: 192.168.25.100,192.168.25.119
+              netmask: 255.255.255.0
+              gateway: 192.168.25.254
+              tag: subnet1
+          overcloud-ironic-1:
+            - ip_range: 192.168.24.120,192.168.24.139
+            - ip_range: 192.168.25.120,192.168.25.139
+              netmask: 255.255.255.0
+              gateway: 192.168.25.254
+              tag: subnet1