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Kafka, mail # user - Metrics: via Broker vs. Producer vs. Consumer


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Re: Metrics: via Broker vs. Producer vs. Consumer
Jay Kreps 2013-07-24, 23:07
Yeah totally that was what I thought you are saying. So what we have is a
yammer metrics which allows you to plug in any metrics reporter (it will do
jmx or whatever). But all this does it let you customize how the individual
java processes output metrics. We don't solve the problem of putting all
these together into a central dashboard. But these can be hooked up to a
standard monitoring thingy that pulls in metrics from all the java
processes in your environment (brokers, consumers, non-kafka related
things, etc) and let's you see these stats in aggregate across all machines.

I'm actually kind of ignorant of the state of open source monitoring
thingies because at linkedin we have a pretty badass in-house thing that
does this and is used for everything. I guess a lot of people used to use
ganglia or nagios for this but nowadays I hear all the cool kids use
graphite?

At various times we have tossed around the idea of having a "Kafka
Monitoring Dashboard" that had a lot of stats on it. This would allow us to
make out-of-the-box monitoring a lot easier for Kafka. The feedback we have
gotten previously is that everyone has some inhouse tool they already use
for graphing/alerting/etc and they don't really want a one-off solution for
Kafka. This is definitely true for our own usage.

-Jay

On Wed, Jul 24, 2013 at 10:04 AM, Otis Gospodnetic <
[EMAIL PROTECTED]> wrote:

> Hi,
>
> Ah, I think I didn't ask my question clearly.  Another try:
> * If I have a javaagent attached to the Kafka process, I'll be able to
> connect to its JMX and get all the Broker metrics for that Broker process.
> * If I have another Broker process, I'll need to attach my agent to this
> process, too, to get all Broker metrics associated with this second Broker
> process.
>
>
> So far OK - like you said, I can sum, average, etc.
>
> But what if I want to get all Producer metrics?  What do I need to do? I
> *believe* I would have to attach the javaagent to whichever app is acting
> as a Kafka Consumer and get Consumer stats from the JMX associated with the
> JVM process running that app.
> Is this correct?
> Is there any way to avoid that and get all Consumer and all Producer
> metrics using the javaagent attached to one of the Broker processes?
>
> Thanks,
> Otis
> ----
> Performance Monitoring for Solr / ElasticSearch / HBase / Hadoop -
> http://sematext.com/spm
>
>
>
>
> >________________________________
> > From: Jay Kreps <[EMAIL PROTECTED]>
> >To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
> >Sent: Wednesday, July 24, 2013 5:22 PM
> >Subject: Re: Metrics: via Broker vs. Producer vs. Consumer
> >
> >
> >Yeah all our monitoring is just of the local process (basically just a
> >counter exposed through yammer metrics which support jmx and other
> >outputs). If I understand what you want instead of having a counter that
> >tracks, say, produce requests per second for a single broker you want one
> >that covers the whole cluster. Obviously this would require collecting the
> >local count and aggregating across all the brokers.
> >
> >Our assumption is that you already have a separate monitoring system which
> >can slurp all these up, aggregate them, graph them, and alert off them.
> >There are a number of open source thingies like this and I think most
> >bigger shops have something they use. Our assumption is that trying to do
> a
> >kafka-specific monitoring system wouldn't work for most people because
> they
> >are wedded to their current setup and just want to integrate with that.
> >
> >I'm not sure how valid any of those assumptions actually are.
> >
> >-Jay
> >
> >
> >On Wed, Jul 24, 2013 at 7:29 AM, Otis Gospodnetic <
> >[EMAIL PROTECTED]> wrote:
> >
> >> Hi,
> >>
> >> I was looking at
> >>
> >>
> https://cwiki.apache.org/confluence/display/KAFKA/Operations#Operations-Monitoring
> >> and noticed there is no information about which metrics are available
> >> in which process/JVM/JMX.
> >>
> >> Some are available in the Broker process, but some are only available