Refactor resource dependencies

This refactors resource dependencies to improve the following points.

 - Avoid unnecessary dependencies across services. For example aodh
   service does not require cinder db.

 - Restart only api service when config files like paste.ini, which
   are used only be api service is changed.

Change-Id: If2cbbc392bd54d906c7a4f51f1c7cfca69463aaf

manifests/api.pp

@@ -176,8 +176,17 @@ class designate::api (
       Service['designate-api'] -> Service[$service_name]
       $service_name_real = false
       Service <| title == 'httpd' |> { tag +> 'designate-service' }
+
+      # On any paste-api.ini config change, we must restart Designate API.
+      Designate_api_paste_ini<||> ~> Service[$service_name]
+
     } else {
       $service_name_real = $service_name
+
+      # On any paste-api.ini config change, we must restart Designate API.
+      Designate_api_paste_ini<||> ~> Service['designate-api']
+      # On any uwsgi config change, we must restart Designate API.
+      Designate_api_uwsgi_config<||> ~> Service['designate-api']
     }
   } else {
     $service_name_real = $service_name

manifests/coordination.pp

@@ -34,4 +34,8 @@ class designate::coordination (
     'coordination/heartbeat_interval':    value => $heartbeat_interval;
     'coordination/run_watchers_interval': value => $run_watchers_interval;
   }
+
+  # all coordination settings should be applied and all packages should be
+  # installed before service startup
+  Oslo::Coordination['designate_config'] -> Anchor['designate::service::begin']
 }

manifests/db.pp

@@ -82,4 +82,7 @@ class designate::db (
     include designate::db::sync
   }
 
+  # all db settings should be applied and all packages should be installed
+  # before dbsync starts
+  Oslo::Db['designate_config'] -> Anchor['designate::dbsync::begin']
 }

manifests/deps.pp

@@ -24,24 +24,13 @@ class designate::deps {
   ~> Service<| tag == 'designate-service' |>
   ~> anchor { 'designate::service::end': }
 
-  # all coordination settings should be applied and all packages should be
-  # installed before service startup
-  Oslo::Coordination<||> -> Anchor['designate::service::begin']
-
-  # paste-api.ini config should occur in the config block also.
   Anchor['designate::config::begin']
   -> Designate_api_paste_ini<||>
-  ~> Anchor['designate::config::end']
-
-  # policy config should occur in the config block also.
-  Anchor['designate::config::begin']
-  -> Openstacklib::Policy<| tag == 'designate' |>
   -> Anchor['designate::config::end']
 
-  # On any uwsgi config change, we must restart Designate APIs.
   Anchor['designate::config::begin']
   -> Designate_api_uwsgi_config<||>
-  ~> Anchor['designate::config::end']
+  -> Anchor['designate::config::end']
 
   # Installation or config changes will always restart services.
   Anchor['designate::install::end'] ~> Anchor['designate::service::begin']

manifests/keystone/authtoken.pp

@@ -284,4 +284,6 @@ class designate::keystone::authtoken(
       service_type                   => $service_type,
       interface                      => $interface;
   }
+
+  Keystone::Resource::Authtoken['designate_config'] -> Anchor['designate::config::end']
 }

manifests/policy.pp

@@ -70,6 +70,11 @@ class designate::policy (
 
   create_resources('openstacklib::policy', { $policy_path => $policy_parameters })
 
+  # policy config should occur in the config block also.
+  Anchor['designate::config::begin']
+  -> Openstacklib::Policy[$policy_path]
+  -> Anchor['designate::config::end']
+
   oslo::policy { 'designate_config':
     enforce_scope        => $enforce_scope,
     enforce_new_defaults => $enforce_new_defaults,