Add CinderEtcdLocalConnect parameter

The parameter, when set to true, will configure cinder-volume to connect
to Etcd through the node's own local IP on the Etcd network, instead of
a VIP on the network.

This is useful when deploying cinder-volume in an A/A configuration at
an edge site with the HCI roles. As Etcd and cinder-volume are both
running on the same node (typically 3 nodes configured the same), then
each node can just connect directly to Etcd without having to go through
a VIP. Additionally, we have no VIP management at the edge sites
presently.

Change-Id: I8a8825ecff9fc99b5de7390075470356397d85a2
implements: blueprint split-controlplane-templates

deployment/cinder/cinder-volume-container-puppet.yaml

@@ -157,6 +157,13 @@ parameters:
   MonitoringSubscriptionCinderVolume:
     default: 'overcloud-cinder-volume'
     type: string
+  CinderEtcdLocalConnect:
+    default: false
+    type: boolean
+    description: When running Cinder A/A, whether to connect to Etcd
+      via the local IP for the Etcd network. If set to true, the ip
+      on the local node will be used. If set to false, the VIP on the Etcd
+      network will be used instead. Defaults to false.
 
 resources:
 
@@ -240,6 +247,16 @@ outputs:
             - {equals : [{get_param: CinderRbdAvailabilityZone}, '']}
             - {}
             - tripleo::profile::base::cinder::volume::rbd::backend_availability_zone: {get_param: CinderRbdAvailabilityZone}
+          -
+            if:
+            - {equals : [{get_param: CinderEtcdLocalConnect}, true]}
+            - tripleo::profile::base::cinder::volume::etcd_host:
+                str_replace:
+                  template:
+                    "%{hiera('$NETWORK')}"
+                  params:
+                    $NETWORK: {get_param: [ServiceNetMap, EtcdNetwork]}
+            - {}
       service_config_settings:
         map_merge:
           - get_attr: [CinderBase, role_data, service_config_settings]

releasenotes/notes/add-CinderEtcdLocalConnect-parameter-8831aad928235458.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - A new parameter, CinderEtcdLocalConnect, is available for the CinderVolume
+    service. When deploying the service A/A, the parameter can be set to true
+    which willconfigure cinder-volume to connect to Etcd locally through the
+    node's own IP instead of going through a VIP.