check_hadoop_mapreduce_nodes_active.pl (Advanced Nagios Plugins Collection)

Part of the Advanced Nagios Plugins Collection, download it here: https://github.com/harisekhon/nagios-plugins ./check_hadoop_mapreduce_nodes_active.pl --help Nagios Plugin to run various checks against a Hadoop MapReduce cluster by querying the JobTracker This is a consolidation/rewrite of two of my previous plugins for MapReduce cluster checks Runs in 1 of 3 modes: 1. available MapReduce nodes and detect any Blacklisted nodes - any Blacklisted nodes raises Critical - checks optional thresholds for the minimum number of available MapReduce nodes available (default 0 == disabled) 2. detect which MapReduce nodes aren't active in the JobTracker if given a node list - checks optional thresholds for the maximum number of missing nodes from the specified list (default 0 == CRITICAL on any missing, you may want to set these thresholds higher) 3. checks the JobTracker Heap % Used Originally written on old vanilla Apache Hadoop 0.20.x, backwards untested rewrite for CDH 4.3 (2.0.0-mr1-cdh4.3.0) Seriously recommend you consider using check_hadoop_cloudera_manager_metrics.pl instead if possible (disclaimer I work for Cloudera but seriously it's better it uses the CM API instead of scraping output which can break betweens versions and requires more maintenance) usage: check_hadoop_mapreduce_nodes_active.pl [ options ] -H --host JobTracker to connect to -P --port JobTracker port to connect to (defaults to 50030) -n --nodes Optional list of nodes to check are alive in the JobTracker (non-switch args are appended to this list for convenience) --heap-usage Check JobTracker Heap % Used. Optional % thresholds may be supplied for warning and/or critical. Recommend you use JMX instead, there is a known issue where this is committed rather than used heap so it appears nearly at max after some run time -w --warning Warning threshold or ran:ge (inclusive) for min number of available nodes or max missing/inactive nodes if node list is given (defaults to 0) -c --critical Critical threshold or ran:ge (inclusive) for min number of available nodes or max missing/inactive nodes if node list is given (defaults to 0) -h --help Print description and usage options -t --timeout Timeout in secs (default: 10) -v --verbose Verbose mode -V --version Print version and exit

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