sysctl: Added define for setting block device scheduler on the fly

sysctl/manifests/init.pp

@@ -29,3 +29,29 @@ define sysctl::set($value) {
     }
 
 }
+
+
+# Set block device scheduler.
+#
+# === Parameters
+#
+#   $name:
+#       Device name.
+#   $scheduler:
+#       Scheduler name.
+#
+# === Sample usage
+#
+# sysctl::block::scheduler { "vda":
+#     scheduler => "noop",
+# }
+#
+define sysctl::block::scheduler($scheduler) {
+
+    exec { "sysctl-${name}-scheduler":
+        path    => "/bin:/usr/bin:/sbin:/usr/sbin",
+        command => "echo '${scheduler}' >/sys/block/${name}/queue/scheduler",
+        unless  => "fgrep -q '[${scheduler}]' /sys/block/${name}/queue/scheduler",
+    }
+
+}