Add code for db and host_access

Glance can be configured to use a mysql db.

This commit adds the classes db and db/host_access.

manifests/db.pp

@@ -0,0 +1,27 @@
+class glance::db(
+  $password,
+  $dbname = 'glance',
+  $user = 'glance',
+  $host = '127.0.0.1',
+  $allowed_hosts = undef,
+  $cluster_id = 'localzone'
+) {
+
+  mysql::db { $dbname:
+    user         => $user,
+    password     => $password,
+    host         => $host,
+    charset      => 'latin1',
+    # I may want to inject some sql
+    require      => Class['mysql::server'],
+  }
+
+  if $allowed_hosts {
+     # TODO this class should be in the mysql namespace
+     glance::db::host_access { $allowed_hosts:
+      user      => $user,
+      password  => $password,
+      database  => $dbname,
+    }
+  }
+}

manifests/db/host_access.pp

@@ -0,0 +1,14 @@
+# db/allowed_hosts.pp
+define glance::db::host_access ($user, $password, $database)  {
+  database_user { "${user}@${name}":
+    password_hash => mysql_password($password),
+    provider => 'mysql',
+    require => Database[$database],
+  }
+  database_grant { "${user}@${name}/${database}":
+    # TODO figure out which privileges to grant.
+    privileges => "all",
+    provider => 'mysql',
+    require => Database_user["${user}@${name}"]
+  }
+}