Add tuning data base configs

Add data base configs: min_pool_size, max_pool_size, max_retries,
retry_interval, max_overflow

Use the same default values as cinder project

Change-Id: Icfc545e41049ee6b3d05fb6770a12d5d2b683f93

manifests/init.pp

@@ -9,6 +9,27 @@
 #   Timeout when db connections should be reaped.
 #   (Optional) Defaults to 3600.
 #
+# [database_min_pool_size]
+#   Minimum number of SQL connections to keep open in a pool.
+#   (Optional) Defaults to 1.
+#
+# [database_max_pool_size]
+#   Maximum number of SQL connections to keep open in a pool.
+#   (Optional) Defaults to undef.
+#
+# [database_max_retries]
+#   Maximum db connection retries during startup.
+#   Setting -1 implies an infinite retry count.
+#   (Optional) Defaults to 10.
+#
+# [database_retry_interval]
+#   Interval between retries of opening a sql connection.
+#   (Optional) Defaults to 10.
+#
+# [database_max_overflow]
+#   If set, use this value for max_overflow with sqlalchemy.
+#   (Optional) Defaults to undef.
+#
 # [*rabbit_use_ssl*]
 #   (optional) Connect over SSL for RabbitMQ
 #   Defaults to false
@@ -85,6 +106,11 @@
 class cinder (
   $database_connection         = 'sqlite:////var/lib/cinder/cinder.sqlite',
   $database_idle_timeout       = '3600',
+  $database_min_pool_size      = '1',
+  $database_max_pool_size      = undef,
+  $database_max_retries        = '10',
+  $database_retry_interval     = '10',
+  $database_max_overflow       = undef,
   $rpc_backend                 = 'cinder.openstack.common.rpc.impl_kombu',
   $control_exchange            = 'openstack',
   $rabbit_host                 = '127.0.0.1',
@@ -292,6 +318,9 @@ class cinder (
   cinder_config {
     'database/connection':               value => $database_connection_real, secret => true;
     'database/idle_timeout':             value => $database_idle_timeout_real;
+    'database/min_pool_size':            value => $database_min_pool_size;
+    'database/max_retries':              value => $database_max_retries;
+    'database/retry_interval':           value => $database_retry_interval;
     'DEFAULT/verbose':                   value => $verbose;
     'DEFAULT/debug':                     value => $debug;
     'DEFAULT/api_paste_config':          value => $api_paste_config;
@@ -300,6 +329,26 @@ class cinder (
     'DEFAULT/default_availability_zone': value => $default_availability_zone_real;
   }
 
+  if $database_max_pool_size {
+    cinder_config {
+      'database/max_pool_size': value => $database_max_pool_size;
+    }
+  } else {
+    cinder_config {
+      'database/max_pool_size': ensure => absent;
+    }
+  }
+
+  if $database_max_overflow {
+    cinder_config {
+      'database/max_overflow': value => $database_max_overflow;
+    }
+  } else {
+    cinder_config {
+      'database/max_overflow': ensure => absent;
+    }
+  }
+
   if($database_connection_real =~ /mysql:\/\/\S+:\S+@\S+\/\S+/) {
     require 'mysql::bindings'
     require 'mysql::bindings::python'

spec/classes/cinder_spec.rb

@@ -52,6 +52,17 @@ describe 'cinder' do
       should contain_cinder_config('database/idle_timeout').with(
         :value => '3600'
       )
+      should contain_cinder_config('database/min_pool_size').with(
+        :value => '1'
+      )
+      should contain_cinder_config('database/max_pool_size').with_ensure('absent')
+      should contain_cinder_config('database/max_retries').with(
+        :value => '10'
+      )
+      should contain_cinder_config('database/retry_interval').with(
+        :value => '10'
+      )
+      should contain_cinder_config('database/max_overflow').with_ensure('absent')
       should contain_cinder_config('DEFAULT/verbose').with(
         :value => false
       )