Add region_name support to Ceilometer and Aodh configurations

- Add region_name to [service_credentials] section in all Ceilometer
  config templates (central, compute, ipmi)
- Add region_name to [keystone_authtoken] and [service_credentials]
  sections in Aodh config template
- Update ceilometer_controller.go to pass Region to templateParameters
- Update autoscaling_controller.go to pass Region to templateParameters

This ensures proper region selection in multi-region deployments for
both incoming request authentication (keystone_authtoken) and outbound
service calls (service_credentials).

Author: vakwetu

internal/controller/autoscaling_controller.go

@@ -721,6 +721,7 @@ func (r *AutoscalingReconciler) generateServiceConfig(
 			instance.Status.DatabaseHostname,
 			autoscaling.DatabaseName),
 		"Timeout": instance.Spec.Aodh.APITimeout,
+		"Region":  keystoneAPI.GetRegion(),
 	}
 
 	prometheusParams := map[string]any{

internal/controller/ceilometer_controller.go

@@ -1261,6 +1261,7 @@ func (r *CeilometerReconciler) generateServiceConfig(
 		"TLS":                 false, // Default to false. Change to true later if TLS enabled
 		"SwiftRole":           false, //
 		"Timeout":             instance.Spec.APITimeout,
+		"Region":              keystoneAPI.GetRegion(),
 	}
 
 	// create httpd  vhost template parameters

templates/autoscaling/config/aodh.conf

@@ -53,6 +53,9 @@ user_domain_name = Default
 project_name = service
 project_domain_name = Default
 service_token_roles_required = True
+{{ if (index . "Region") -}}
+region_name = {{ .Region }}
+{{ end -}}
 
 [service_credentials]
 auth_type=password
@@ -63,6 +66,9 @@ username={{ .AodhUser }}
 user_domain_name=Default
 password={{ .AodhPassword }}
 interface = internalURL
+{{ if (index . "Region") -}}
+region_name = {{ .Region }}
+{{ end -}}
 
 [healthcheck]
 [service_types]

templates/ceilometercentral/config/ceilometer.conf

@@ -16,6 +16,9 @@ username=ceilometer
 user_domain_name=Default
 password={{ .CeilometerPassword }}
 interface = internalURL
+{{ if (index . "Region") -}}
+region_name = {{ .Region }}
+{{ end -}}
 {{- if .TLS }}
 cafile = {{ .CAFile }}
 {{- end }}

templates/ceilometercompute/config/ceilometer.conf

@@ -14,6 +14,9 @@ username=ceilometer
 user_domain_name=Default
 password={{ .CeilometerPassword }}
 interface = internalURL
+{{ if (index . "Region") -}}
+region_name = {{ .Region }}
+{{ end -}}
 
 [compute]
 instance_discovery_method=libvirt_metadata

templates/ceilometeripmi/config/ceilometer.conf

@@ -15,6 +15,9 @@ username=ceilometer
 user_domain_name=Default
 password={{ .CeilometerPassword }}
 interface = internalURL
+{{ if (index . "Region") -}}
+region_name = {{ .Region }}
+{{ end -}}
 
 [coordination]
 backend_url=