Write restart flags to restart services only when necessary

Write restart flag file for services managed by Pacemaker into
/var/lib/tripleo/pacemaker-restarts directory. The name of the file must
match the name of the clone resource defined in pacemaker. The
post-puppet restart script will restart each service having a restart
flag file and remove those files.

This approach focuses on $pacemaker_master only (we don't want to
restart the pacemaker services 3 times when we have 3 controllers), so
it relies on the assumption that we're making the matching config
changes across the pacemaker nodes.

Change-Id: I6369ab0c82dbf3c8f21043f8aa9ab810744ddc12

1 files changed, 35 insertions, 0 deletions

diff --git a/manifests/pacemaker/resource_restart_flag.pp b/manifests/pacemaker/resource_restart_flag.pp
new file mode 100644
index 0000000..aded802
--- /dev/null
+++ b/manifests/pacemaker/resource_restart_flag.pp
@@ -0,0 +1,35 @@
+# Copyright 2016 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# == Define: tripleo::pacemaker::resource_restart_flag
+#
+# Creates a flag file on the filesystem to signify that a pacemaker
+# resource needs restarting (usually to pick up config changes after
+# they've been written on all nodes).
+#
+# === Parameters
+#
+# [*title*]
+#   The resource name in Pacemaker to restart. If it's a cloned
+#   resource, the name should include the '-clone' part.
+#
+define tripleo::pacemaker::resource_restart_flag() {
+
+  exec { "${title} resource restart flag":
+    command     => "touch /var/lib/tripleo/pacemaker-restarts/${title}",
+    path        => ['/bin','/usr/bin','/sbin','/usr/sbin'],
+    refreshonly => true,
+  }
+
+}