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https://issues.apache.org/jira/browse/ZOOKEEPER-3092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16548197#comment-16548197
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Michael Han commented on ZOOKEEPER-3092:
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[~eolivelli] I think this work does not depend on the ongoing maven work, and
we should treat the metric system interfaces as part of ZooKeeper instead of
using external ones, for the same reason Robert mentioned, so we can have full
control over it which would give us more flexibilities over what we want to add
/ remove down the road. Please let me know if you have any concerns of this
approach (and I am also interested on hearing what others think).
Yes designing the metrics API is the first step. It does not have to be
perfect, and have everything other metric systems already have, and we can
started from typical metrics types and a reporting interface. I am thinking we
can use org.apache.zookeeper.metrics as namespace. Once the first version of
interfaces are defined, we could provide a set of default implementations. Then
we can proceed to implement the feature of dynamically load an external metrics
reporting library. And some testings of course along the way. Sounds a lot of
work, but should be fun :).
It's up to you how you want to do the design work - a short design doc or a
pull request for the proposed interfaces, either would work. Also it's likely
we should use this Jira as an umbrella and create actual tasks under it so this
feature can be shipped incrementally.
> Pluggable metrics system for ZooKeeper
> --------------------------------------
>
> Key: ZOOKEEPER-3092
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3092
> Project: ZooKeeper
> Issue Type: New Feature
> Components: metric system
> Reporter: Michael Han
> Priority: Major
>
> ZooKeeper should provide a pluggable metrics system such that various metrics
> can be collected and reported using different approaches that fit production
> monitoring / alert / debugging needs.
> Historically ZooKeeper provides four letter words and JMX which exposes
> certain stats / metrics but they are not very flexible in terms of
> programmatically accessing metrics and connecting metrics to different
> reporting systems.
> There are other projects that's already doing this which can be used for
> reference, such as bookkeeper metrics service providers and hadoop metrics2.
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