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From Guillaume Nodet <gno...@apache.org>
Subject Re: [PROPOSAL] Karaf Decanter monitoring
Date Wed, 15 Oct 2014 10:04:20 GMT
I think this would need to be reworked a bit.
Especially, I don't think a Map keyed by the timestamp is correct, as you
could have multiple events collected with the same timestamp.

Basically, what I ended up with for fabric was the following data:

  * a "type" of events (for example, jetty, camel, metrics, etc...)
  * a "timestamp"
  * a blob of json data
This was specifically written for elasticsearch.

So in our latest experiments, we ended up passing a more structured object
instead of a blob of json data:


The main problem I think, is that we may not want to store log events to
the same backend as metrics.

Also, I've been thinking about, is the relation with flume for aggregating
/ conveying data.  It could be useful in big deployments, so we need to
keep that in mind.

2014-10-15 11:12 GMT+02:00 Jean-Baptiste Onofré <jb@nanthrax.net>:

> It's the collected data.
> Basically, it's:
> - timestamp of the data/metric
> - map of key/value (for instance, JMX Attribute Name => JMX Attribute
> Value)
> Regards
> JB
> On 10/15/2014 11:11 AM, Guillaume Nodet wrote:
>> Great thx !
>> First technical question, can you explain what does the Map<Long,
>> Map<String
>> , Object>> in the api interfaces (Collector, Appender, etc...) represents
>> ?
>> Guillaume
>> 2014-10-15 11:08 GMT+02:00 Jean-Baptiste Onofré <jb@nanthrax.net>:
>>  Oh by the way, I forgot the github link:
>>> https://github.com/jbonofre/karaf-decanter
>>> Sorry about that guys !
>>> Regards
>>> JB
>>> On 10/14/2014 05:12 PM, Jean-Baptiste Onofré wrote:
>>>  Hi all,
>>>> First of all, sorry for this long e-mail ;)
>>>> Some weeks ago, I blogged about the usage of ELK
>>>> (Logstash/Elasticsearch/Kibana) with Karaf, Camel, ActiveMQ, etc to
>>>> provide a monitoring dashboard (know what's happen in Karaf and be able
>>>> to store it for a long period):
>>>> http://blog.nanthrax.net/2014/03/apache-karaf-cellar-camel-
>>>> activemq-monitoring-with-elk-elasticsearch-logstash-and-kibana/
>>>> If this solution works fine, there are some drawbacks:
>>>> - it requires additional middlewares on the machines. Additionally to
>>>> Karaf itself, we have to install logstash, elasticsearch nodes, and
>>>> kibana console
>>>> - it's not usable "out of the box": you need at least to configure
>>>> logstash (with the different input/output plugins), kibana (to create
>>>> the dashboard that you need)
>>>> - it doesn't cover all the monitoring needs, especially in term of SLA:
>>>> we want to be able to raise some alerts depending of some events (for
>>>> instance, when a regex is match in the log messages, when a feature is
>>>> uninstalled, when a JMX metric is greater than a given value, etc)
>>>> Actually, Karaf (and related projects) already provides most (all) data
>>>> required for the monitoring. However, it would be very helpful to have a
>>>> "glue", ready to use and more user friendly, including a storage of the
>>>> metrics/monitoring data.
>>>> Regarding this, I started a prototype of a monitoring solution for Karaf
>>>> and the applications running in Karaf.
>>>> The purpose is to be very extendible, flexible, easy to install and use.
>>>> In term of architecture, we can find the following component:
>>>> 1/ Collectors & SLA Policies
>>>> The collectors are services responsible of harvesting monitoring data.
>>>> We have two kinds of collectors:
>>>> - the polling collectors are invoked by a scheduler periodically.
>>>> - the event driven collectors react to some events.
>>>> Two collectors are already available:
>>>> - the JMX collector is a polling collector which harvest all MBeans
>>>> attributes
>>>> - the Log collector is a event driven collector, implementing a
>>>> PaxAppender which react when a log message occurs
>>>> We can planned the following collectors:
>>>> - a Camel Tracer collector would be an event driven collector, acting as
>>>> a Camel Interceptor. It would allow to trace any Exchange in Camel.
>>>> It's very dynamic (thanks to OSGi services), so it's possible to add a
>>>> new custom collector (user/custom implementation).
>>>> The Collectors are also responsible of checking the SLA. As the SLA
>>>> policies are tight to the collected data, it makes sense that the
>>>> collector validates the SLA and call/delegate the alert to SLA services.
>>>> 2/ Scheduler
>>>> The scheduler service is responsible to call the Polling Collectors,
>>>> gather the harvested data, and delegate to the dispatcher.
>>>> We already have a simple scheduler (just a thread), but we can plan a
>>>> quartz scheduler (for advanced cron/trigger configuration), and another
>>>> one leveraging the Karaf scheduler.
>>>> 3/ Dispatcher
>>>> The dispatcher is called by the scheduler or the event driven collectors
>>>> to dispatch the collected data to the appenders.
>>>> 4/ Appenders
>>>> The appender services are responsible to send/store the collected data
>>>> to target systems.
>>>> For now, we have two appenders:
>>>> - a log appender which just log the collected data
>>>> - a elasticsearch appender which send the collected data to a
>>>> elasticsearch instance. For now, it uses "external" elasticsearch, but
>>>> I'm working on an elasticsearch feature allowing to embed elasticsearch
>>>> in Karaf (it's mostly done).
>>>> We can plan the following other appenders:
>>>> - redis to send the collected data in Redis messaging system
>>>> - jdbc to store the collected data in a database
>>>> - jms to send the collected data to a JMS broker (like ActiveMQ)
>>>> - camel to send the collected data to a Camel direct-vm/vm endpoint of a
>>>> route (it would create an internal route)
>>>> 5/ Console/Kibana
>>>> The console is composed by two parts:
>>>> - a angularjs or bootstrap layer allowing to configure the SLA and
>>>> global settings
>>>> - embedded kibana instance with pre-configured dashboard (when the
>>>> elasticsearch appender is used). We will have a set of already created
>>>> lucene queries and a kind of "Karaf/Camel/ActiveMQ/CXF" dashboard
>>>> template. The kibana instance will be embedded in Karaf (not external).
>>>> Of course, we have ready to use features, allowing to very easily
>>>> install modules that we want.
>>>> I named the prototype Karaf Decanter. I don't have preference about the
>>>> name, and the location of the code (it could be as Karaf subproject like
>>>> Cellar or Cave, or directly in the Karaf codebase).
>>>> Thoughts ?
>>>> Regards
>>>> JB
>>> --
>>> Jean-Baptiste Onofré
>>> jbonofre@apache.org
>>> http://blog.nanthrax.net
>>> Talend - http://www.talend.com
> --
> Jean-Baptiste Onofré
> jbonofre@apache.org
> http://blog.nanthrax.net
> Talend - http://www.talend.com

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