Author: Patrick Hunt (follow me on twitter)
This project provides a unix “top” like utility for ZooKeeper.
Running:
./zktop.py --servers "localhost:2181,localhost:2182,localhost:2183"
or, for a ZK-style configuration file:
./zktop.py --config zk.conf
shows a screen like:
Ensemble -- nodecount:10 zxid:0x1300000001 sessions:4 SERVER PORT M OUTST RECVD SENT CONNS MINLAT AVGLAT MAXLAT localhost 2181 F 0 93 92 2 2 7 13 localhost 2182 F 0 37 36 1 0 0 0 localhost 2183 L 0 36 35 1 0 0 0 CLIENT PORT I QUEUE RECVD SENT 127.0.0.1 34705 1 0 56 56 127.0.0.1 35943 1 0 1 0 127.0.0.1 33999 1 0 1 0 127.0.0.1 37988 1 0 1 0
From the official site: “ZooKeeper is a high-performance coordination service for distributed applications.”
It exposes common services – such as naming, configuration management, synchronization, and group services – in a simple interface so you don’t have to write them from scratch. You can use it off-the-shelf to implement consensus, group management, leader election, and presence protocols.
0) Top line is overall cluster status
1-n) Lines 1-n are for the n servers
n+1 and below are for client connections
Usage: zktop.py [options]
Options:
-h, --help show this help message and exit
--servers=SERVERS comma separated list of host:port (default
localhost:2181)
-n, --names resolve session name from ip (default False)
--fix_330 workaround for a bug in ZK 3.3.0
-v VERBOSITY, --verbosity=VERBOSITY
log level verbosity (DEBUG, INFO, WARN(ING), ERROR, CRITICAL/FATAL))
-l LOGFILE, --logfile=LOGFILE
directory in which to place log file, or empty for
none
-c CONFIGFILE, --config=CONFIGFILE
zookeeper configuration file to lookup servers from
—fix_330 works around a bug in ZooKeeper 3.3.0, it is only necessary if running the server against that version of ZooKeeper.
The screen refreshes every 3 seconds.
- ‘h’ help
- ‘q’ quits
- ‘r’ resets the server stats
- spacebar updates immediately
This project is licensed under the Apache License Version 2.0