add check-mtime-follow-symlink.sh

Author: tcaddy

check-mtime-follow-symlink.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+#
+# Rackspace Cloud Monitoring Plug-In
+# Check the mtime of a file and how long it has been since it has been modified
+#
+# (c) 2015 Justin Gallardo <[email protected]>
+# All Rights Reserved.
+#
+# 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.
+#
+# Usage:
+# Place plug-in in /usr/lib/rackspace-monitoring-agent/plugins
+#
+# It accepts one argument, which should be the file you wish to check the mtime of.
+#
+# If the file is a symlink, it will follow it and return mtime/age/size of actual file.
+#
+# Returns 3 metrics:
+#  - mtime: The time(unix epoch) the file was last modified
+#  - age: The number of seconds that have elapsed since the file was modified
+#  - size: The number of bytes of the file
+#
+# The following is an example 'criteria' for a Rackspace Monitoring Alarm:
+#
+# if (metric['age'] > 3600) {
+#  return new AlarmStatus(CRITICAL, 'The file has not been modified in more than 1 hour. Last modified #{age} seconds ago');
+# }
+# return new AlarmStatus(OK, 'The file was last modified #{age} seconds ago.');
+#
+file=$1
+
+if [ ! -e $file ]; then
+  echo "status critical \"$file\" does not exist"
+  exit 1
+fi
+
+if [ ! -r $file ]; then
+  echo "status critical \"$file\" is not readable"
+  exit 1
+fi
+
+if [ -h $file ]; then
+  file=$(realpath $file)
+fi
+
+mtime=$(stat -c%Y $file)
+now=$(date '+%s')
+age=$(( $now - $mtime ))
+size=$(stat -c%s $file)
+
+echo "status ok file statted"
+echo "metric mtime uint64 $mtime"
+echo "metric age uint64 $age seconds"
+echo "metric size uint64 $size"
+exit 0
+