Type: New Feature
Affects Version/s: 3.4.0
Fix Version/s: 3.4.0
Release Note:Added new 4letter word for monitoring: "mntr" The output is compatible with the Java properties format.Your script should expect content changes: new keys could be added in the future.
Filing a feature request based on a zookeeper-user discussion.
Zookeeper should have a new four-letter word that returns key-value pairs appropriate for importing to a monitoring system (such as Ganglia which has a large installed base)
This command should initially export the following:
(a) Count of instances in the ensemble.
(b) Count of up-to-date instances in the ensemble.
But be designed such that in the future additional data can be added. For example, the output could define the statistic in a comment, then print a key "space character" value line:
- Total number of instances in the ensemble
- Number of instances currently participating in the quorum.
From the mailing list:
Date: Mon, 19 Apr 2010 12:10:44 -0700
From: Patrick Hunt <firstname.lastname@example.org>
Subject: Re: Recovery issue - how to debug?
On 04/19/2010 11:55 AM, Travis Crawford wrote:
> It would be a lot easier from the operations perspective if the leader
> explicitly published some health stats:
> (a) Count of instances in the ensemble.
> (b) Count of up-to-date instances in the ensemble.
> This would greatly simplify monitoring& alerting - when an instance
> falls behind one could configure their monitoring system to let
> someone know and take a look at the logs.
That's a great idea. Please enter a JIRA for this - a new 4 letter word
and JMX support. It would also be a great starter project for someone
interested in becoming more familiar with the server code.