check_zookeeper_znode.pl (Advanced Nagios Plugins Collection)

check_zookeeper_znode.pl Part of the Advanced Nagios Plugins Collection, download it here: https://github.com/harisekhon/nagios-plugins ================================================================================ Some useful examples: ================================================================================ * Check we have an active HBase Root Master (this is an ephemeral node that will disappear if Master is down): check_hbase_master_znode.pl -H or check_zookeeper_znode.pl -H -z /hbase/master --ephemeral ________________________________________________________________________________ * Check we have an HBase Root RegionServer assigned: check_hbase_root_regionserver_znode.pl -H or check_zookeeper_znode.pl -H -z /hbase/root-region-server ________________________________________________________________________________ * Check there are no HBase unassigned regions (should be blank hence -d ""): check_hbase_unassigned_regions_znode.pl -H or check_zookeeper_znode.pl -H -z /hbase/unassigned -d "" --no-child-znodes ________________________________________________________________________________ * Check there are HBase Backup Masters: check_hbase_backup_masters_znode.pl -H or check_zookeeper_znode.pl -H -z /hbase/backup-masters ________________________________________________________________________________ * Check given SolrCloud server is alive and holding it's ephemeral znode: check_solrcloud_server_znode.pl -H -z /solr/live_nodes/:8983_solr or check_zookeeper_znode.pl -H -z /solr/live_nodes/:8983_solr --null --ephemeral ________________________________________________________________________________ * Check HDFS NameNode HA ZKFC is working check_hadoop_namenode_ha_zkfc_znode.pl -H or check_zookeeper_znode.pl -H -z /hadoop-ha/nameservice1/ActiveStandbyElectorLock --ephemeral ________________________________________________________________________________ * Check MapReduce v1 JobTracker HA ZKFC is working check_hadoop_jobtracker_ha_zkfc_znode.pl -H or check_zookeeper_znode.pl -H -z /hadoop-ha/logicaljt/ActiveStandbyElectorLock --ephemeral ================================================================================ usage: check_zookeeper_znode.pl [ options ] -H --host ZooKeeper node(s) to connect to, should be a comma separated list of ZooKeepers the same as are configured on the ZooKeeper servers themselves (node1:2181,node2:2181,node3:2181). It takes longer to connect to 3 ZooKeepers than just one of them (around 5 secs per ZooKeeper specified + (session-timeout x any offline ZooKeepers) so you will need to increase --timeout). Connection order is deterministic and will be tried in the order specified unless --random-conn-order -P --port Port to connect to on ZooKeepers for any nodes not suffixed with : (defaults to 2181) -z --znode Znode to check exists. Useful for a variety of checks of ZooKeeper based services like HBase, SolrCloud, NameNode & JobTracker HA ZKFC -d --data Check given znode contains specific data (optional). This is a partial substring match, for more control use --regex with anchors. Careful when specifying non-printing characters which may appear as ?, may need to use regex to work around them with ".+" to match any character -r --regex Check given znode contains data matching this case insensitive regex (optional). Checked after --data -n --null Do not check znode contents, use on null znodes such as SolrCloud /solr/live_nodes/:8983_solr as the API segfaults when trying to retrieve data for these null znodes -e --ephemeral Check given znode is ephemeral (optional) --child-znodes Check given znode to has child znodes (optional) --no-child-znodes Check given znode to not have child znodes (optional) -u --user User to connect with (Not tested. YMMV. optional) -p --password Password to connect with (Not tested. YMMV. optional) -w --warning Warning threshold or ran:ge (inclusive) for znode age (optional) -c --critical Critical threshold or ran:ge (inclusive) for znode age (optional) --random-conn-order Randomize connection order --session-timeout ZooKeeper session timeout in secs (default: 2). This determines how long to wait for connection to downed ZooKeepers and affects total execution time -h --help Print description and usage options -t --timeout Timeout in secs (default: 10) -v --verbose Verbose mode (-v, -vv, -vvv ...) -V --version Print version and exit

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