Is there a cli or some command-line, that I can use to find the zookeeper cluster status. Basically I want to know how to member in cluster or which nodes is acting as a leader.
Any pointers will be helpful.
Saw this question in stackoverflow: https://stackoverflow.com/questions/16669104/how-to-get-current-zookeeper-clusters-member-server-list, but wasn't helpful
You can determine which node is acting as a leader by enter the following command:
echo stat | nc localhost 2181 | grep Mode You will get the response if the node is acting as a leader:
Mode: leader If it is a follower, you will see:
Mode: follower Alternatively, you can use the zkServer.sh located in /opt/zookeeper/bin:
./zkServer.sh status The output of which would be:
ZooKeeper JMX enabled by default Using config: /opt/zookeeper/bin/../conf/zoo.cfg Mode: follower You can obtain even more information using:
echo mntr | nc localhost 2181 The output of which is:
zk_version 3.4.8--1, built on 02/06/2016 03:18 GMT zk_avg_latency 0 zk_max_latency 0 zk_min_latency 0 zk_packets_received 7 zk_packets_sent 6 zk_num_alive_connections 2 zk_outstanding_requests 0 zk_server_state follower zk_znode_count 357 zk_watch_count 0 zk_ephemerals_count 5 zk_approximate_data_size 846524 zk_open_file_descriptor_count 36 zk_max_file_descriptor_count 4096 If the node is a leader, you will also see:
zk_followers 5 zk_synced_followers 5 zk_pending_syncs 0 The following will not be present on Windows platforms:
zk_open_file_descriptor_count 43 zk_max_file_descriptor_count 4096 Using the information above, you can determine the health of your Zookeeper ensemble.
