Zookeeper

Apache Zookeeper is a highly reliable distributed coordination system, which is build on ideas of Google's Chubby. Lots of distributed systems (HBase, Kafka, etc .. ) use Apache Zookeeper coordinator service, so monitoring of Zookeeper service is very critical for these infrastructures.

Agent natively supports Zookeeper metrics and all is needed to point Agent to right Zookeeper host/port.

Configuration of check_zookeeper is stored in conf/hadoop.ini file. For most of setups it does not needs extra configuration, but if you run Zookeeper on different from default host/port, edit conf/hadoop.ini section ZooKeeper with setting of your ZooKeeper service:

Install

cd ${OE_AGENT_HOME}/checks_enabled
ln -s ../checks_available/check_zookeeper.py ./

Configure

[ZooKeeper]
host: 127.0.0.1
port: 2181

Restart

${OE_AGENT_HOME}/oddeye.sh restart

Provides

Name Description Type Unit
zk_approximate_data_size Approximate data size in bytes gauge Bytes
zk_avg_latency Average latency of requests gauge Milliseconds
zk_ephemerals_count Ephemeral items count gauge None
zk_max_latency Requests max latency gauge Milliseconds
zk_min_latency Requests min latency gauge Milliseconds
zk_open_file_descriptor_count ZooKeeper daemon open files descriptors count gauge None
zk_outstanding_requests Outstanding requests count gauge None
zk_packets_received ZooKeeper packets received per second rate OPS
zk_packets_sent ZooKeeper packets sent per second rate OPS
zk_watch_count ZooKeeper watches count gauge None
zk_znode_count ZooKeeper Znodes count gauge None