diff --git a/manifests/db.pp b/manifests/db.pp
index 5fe2869e..7c81b82f 100644
--- a/manifests/db.pp
+++ b/manifests/db.pp
@@ -13,6 +13,10 @@
 #   Url used to connect to database.
 #   (Optional) Defaults to "sqlite:////var/lib/aodh/aodh.sqlite".
 #
+# [*slave_connection*]
+#   (optional) Connection url to connect to aodh slave database (read-only).
+#   Defaults to $::os_service_default.
+#
 # [*database_idle_timeout*]
 #   Timeout when db connections should be reaped.
 #   (Optional) Defaults to $::os_service_default.
@@ -45,6 +49,7 @@
 class aodh::db (
   $database_db_max_retries = $::os_service_default,
   $database_connection     = 'sqlite:////var/lib/aodh/aodh.sqlite',
+  $slave_connection        = $::os_service_default,
   $database_idle_timeout   = $::os_service_default,
   $database_min_pool_size  = $::os_service_default,
   $database_max_pool_size  = $::os_service_default,
@@ -57,6 +62,7 @@ class aodh::db (
   include ::aodh::deps
 
   $database_connection_real = pick($::aodh::database_connection, $database_connection)
+  $slave_connection_real = pick($::aodh::slave_connection, $slave_connection)
   $database_idle_timeout_real = pick($::aodh::database_idle_timeout, $database_idle_timeout)
   $database_min_pool_size_real = pick($::aodh::database_min_pool_size, $database_min_pool_size)
   $database_max_pool_size_real = pick($::aodh::database_max_pool_size, $database_max_pool_size)
@@ -65,14 +71,15 @@ class aodh::db (
   $database_max_overflow_real = pick($::aodh::database_max_overflow, $database_max_overflow)
 
   oslo::db { 'aodh_config':
-    db_max_retries => $database_db_max_retries,
-    connection     => $database_connection_real,
-    idle_timeout   => $database_idle_timeout_real,
-    min_pool_size  => $database_min_pool_size_real,
-    max_pool_size  => $database_max_pool_size_real,
-    max_retries    => $database_max_retries_real,
-    retry_interval => $database_retry_interval_real,
-    max_overflow   => $database_max_overflow_real,
-    pool_timeout   => $database_pool_timeout,
+    db_max_retries   => $database_db_max_retries,
+    connection       => $database_connection_real,
+    slave_connection => $slave_connection_real,
+    idle_timeout     => $database_idle_timeout_real,
+    min_pool_size    => $database_min_pool_size_real,
+    max_pool_size    => $database_max_pool_size_real,
+    max_retries      => $database_max_retries_real,
+    retry_interval   => $database_retry_interval_real,
+    max_overflow     => $database_max_overflow_real,
+    pool_timeout     => $database_pool_timeout,
   }
 }
diff --git a/spec/classes/aodh_db_spec.rb b/spec/classes/aodh_db_spec.rb
index 4c64405b..a82e4ed2 100644
--- a/spec/classes/aodh_db_spec.rb
+++ b/spec/classes/aodh_db_spec.rb
@@ -23,6 +23,7 @@ describe 'aodh::db' do
       let :params do
         { :database_db_max_retries => '-1',
           :database_connection     => 'mysql+pymysql://aodh:aodh@localhost/aodh',
+          :slave_connection        => 'mysql+pymysql://aodh:aodh@localhost2/aodh',
           :database_idle_timeout   => '3601',
           :database_min_pool_size  => '2',
           :database_max_pool_size  => '11',
@@ -33,15 +34,16 @@ describe 'aodh::db' do
         }
       end
       it { is_expected.to contain_oslo__db('aodh_config').with(
-        :db_max_retries => '-1',
-        :connection     => 'mysql+pymysql://aodh:aodh@localhost/aodh',
-        :idle_timeout   => '3601',
-        :min_pool_size  => '2',
-        :max_pool_size  => '11',
-        :max_retries    => '11',
-        :retry_interval => '11',
-        :max_overflow   => '21',
-        :pool_timeout   => '21',
+        :db_max_retries   => '-1',
+        :connection       => 'mysql+pymysql://aodh:aodh@localhost/aodh',
+        :slave_connection => 'mysql+pymysql://aodh:aodh@localhost2/aodh',
+        :idle_timeout     => '3601',
+        :min_pool_size    => '2',
+        :max_pool_size    => '11',
+        :max_retries      => '11',
+        :retry_interval   => '11',
+        :max_overflow     => '21',
+        :pool_timeout     => '21',
       )}
 
     end