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: I789537557b60d9a408cec9fde65ac9ddc1cb743b

manifests/api.pp

@@ -127,6 +127,8 @@ class ironic::api (
         tag        => 'ironic-service',
       }
       Keystone_endpoint<||> -> Service['ironic-api']
+      Ironic_api_uwsgi_config<||> ~> Service['ironic-api']
+
     } elsif $service_name == 'httpd' {
       service { 'ironic-api':
         ensure => 'stopped',

manifests/api/authtoken.pp

@@ -280,4 +280,6 @@ class ironic::api::authtoken(
       service_type                   => $service_type,
       interface                      => $interface;
   }
+
+  Keystone::Resource::Authtoken['ironic_config'] -> Anchor['ironic::config::end']
 }

manifests/db.pp

@@ -67,7 +67,9 @@ class ironic::db (
     db_max_retries          => $database_db_max_retries,
     pool_timeout            => $database_pool_timeout,
     mysql_enable_ndb        => $mysql_enable_ndb,
-    tag                     => 'ironic',
   }
 
+  # all db settings should be applied and all packages should be installed
+  # before dbsync starts
+  Oslo::Db['ironic_config'] -> Anchor['ironic::dbsync::begin']
 }

manifests/deps.pp

@@ -26,15 +26,6 @@ class ironic::deps {
   ~> Service<| tag == 'ironic-service' |>
   ~> anchor { 'ironic::service::end': }
 
-  # all db settings should be applied and all packages should be installed
-  # before dbsync starts
-  Oslo::Db<| tag == 'ironic' |> -> Anchor['ironic::dbsync::begin']
-  Oslo::Db<| tag == 'ironic-inspector' |> -> Anchor['ironic::dbsync::begin']
-
-  # all coordination settings should be applied and all packages should be
-  # installed before service startup
-  Oslo::Coordination<| tag == 'ironic-inspector' |> -> Anchor['ironic-inspector::service::begin']
-
   # ironic-inspector is supported by this module.  This service uses a
   # specific conf file and uses it's own config provider. Split out install
   # and configure of this service so that other services are not affected.
@@ -56,20 +47,10 @@ class ironic::deps {
   ~> Service<| tag == 'ironic-inspector-dnsmasq-service' |>
   ~> Anchor['ironic-inspector::service::end']
 
-  # On any uwsgi config change, we must restart Ironic API.
   Anchor['ironic::config::begin']
   -> Ironic_api_uwsgi_config<||>
-  ~> Anchor['ironic::config::end']
-
-  # policy config should occur in the config block also.
-  Anchor['ironic::config::begin']
-  -> Openstacklib::Policy<| tag == 'ironic' |>
   -> Anchor['ironic::config::end']
 
-  Anchor['ironic-inspector::config::begin']
-  -> Openstacklib::Policy<| tag == 'ironic-inspector' |>
-  -> Anchor['ironic-inspector::config::end']
-
   # Support packages need to be installed in the install phase, but we don't
   # put them in the chain above because we don't want any false dependencies
   # between packages with the ironic-package tag and the ironic-support-package

manifests/inspector/authtoken.pp

@@ -283,4 +283,6 @@ class ironic::inspector::authtoken(
       service_type                   => $service_type,
       interface                      => $interface;
   }
+
+  Keystone::Resource::Authtoken['ironic_inspector_config'] -> Anchor['ironic-inspector::config::end']
 }

manifests/inspector/coordination.pp

@@ -16,6 +16,9 @@ class ironic::inspector::coordination (
 
   oslo::coordination{ 'ironic_inspector_config':
     backend_url => $backend_url,
-    tag         => 'ironic-inspector',
   }
+
+  # all coordination settings should be applied and all packages should be
+  # installed before service startup
+  Oslo::Coordination['ironic_inspector_config'] -> Anchor['ironic-inspector::service::begin']
 }

manifests/inspector/db.pp

@@ -55,7 +55,7 @@ class ironic::inspector::db (
   $mysql_enable_ndb                 = $facts['os_service_default'],
 ) {
 
-  include ironic::params
+  include ironic::deps
 
   oslo::db { 'ironic_inspector_config':
     connection              => $database_connection,
@@ -67,7 +67,9 @@ class ironic::inspector::db (
     max_overflow            => $database_max_overflow,
     pool_timeout            => $database_pool_timeout,
     mysql_enable_ndb        => $mysql_enable_ndb,
-    tag                     => 'ironic-inspector',
   }
 
+  # all db settings should be applied and all packages should be installed
+  # before dbsync starts
+  Oslo::Db['ironic_inspector_config'] -> Anchor['ironic-inspector::dbsync::begin']
 }

manifests/inspector/policy.pp

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

manifests/policy.pp

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

spec/classes/ironic_inspector_policy_spec.rb

@@ -33,7 +33,6 @@ describe 'ironic::inspector::policy' do
           :file_group   => 'ironic-inspector',
           :file_format  => 'yaml',
           :purge_config => false,
-          :tag          => 'ironic-inspector',
         )
         is_expected.to contain_oslo__policy('ironic_inspector_config').with(
           :enforce_scope        => false,
@@ -64,7 +63,6 @@ describe 'ironic::inspector::policy' do
           :file_group   => 'ironic-inspector',
           :file_format  => 'yaml',
           :purge_config => true,
-          :tag          => 'ironic-inspector',
         )
         is_expected.to contain_oslo__policy('ironic_inspector_config').with(
           :enforce_scope        => false,

spec/classes/ironic_policy_spec.rb

@@ -33,7 +33,6 @@ describe 'ironic::policy' do
           :file_group   => 'ironic',
           :file_format  => 'yaml',
           :purge_config => false,
-          :tag          => 'ironic',
         )
         is_expected.to contain_oslo__policy('ironic_config').with(
           :enforce_scope        => false,
@@ -64,7 +63,6 @@ describe 'ironic::policy' do
           :file_group   => 'ironic',
           :file_format  => 'yaml',
           :purge_config => true,
-          :tag          => 'ironic',
         )
         is_expected.to contain_oslo__policy('ironic_config').with(
           :enforce_scope        => false,