Listen to the sounds of your application

Listen to the sounds of your application

!2

Krzysztof Ciesielski

@kpciesielski

softwaremill.com

Lublin Software Craftsmen

!3

Maciej Biłas

@maciejb

softwaremill.com

jbison.com

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• Monitoring, huh?

• Introducing Graphite

• Log analysis – the whys

• Logstash architecture & use cases

• Exploring logs with Kibana

Agenda

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Monitoring, huh?

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source: codeascraft.com

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Types of measurements

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Types of measurements

Network

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Types of measurements

Network

Machine

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Types of measurements

Network

Machine

Application

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source: codeascraft.com

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measurement > prediction

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measurement >> prediction

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Our stack

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Our stack

Server

App

Server

App

…

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Our stack

Server

App

Server

App

…

Graphite Logstash

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Our stack

Server

App

Server

App

…

Graphite Logstash

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Our stack

Server

App

Server

App

…

Graphite Logstash

!12

Our stack

Server

App

Server

App

…

Graphite Logstash

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Our stack

Server

App

Server

App

…

Graphite Logstash

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Our stack

Server

App

Server

App

…

Graphite Logstash

Yammer Metrics

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Introducing Graphite

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http://graphite/render?target=server.web1.load&height=800&width=600

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Graphite

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PORT=2003 SERVER=graphite.your.org echo "local.random.diceroll 4 `date +%s`" | nc ${SERVER} ${PORT}; 

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successful.login.attempt 1 1384471287 successful.login.attempt 1 1384471297

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successful.login.attempt 1 1384471287 successful.login.attempt 1 1384471297

=> successful.login.attempt = 1

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Yammer Metrics

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Yammer Metrics

private final Meter successfulLogins = metrics.meter(name(LoginHandler.class, "successful")); !public void login(String user, String password) { if (canLogin(user,password)) { successfulLogins.mark(); // ... } else { // ... } }

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Metrics

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MetricsTypes:

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MetricsTypes:

•Gauges

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MetricsTypes:

•Gauges

•Counters

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MetricsTypes:

•Gauges

•Counters

•Meters

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MetricsTypes:

•Gauges

•Counters

•Meters

•Histograms

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MetricsTypes:

•Gauges

•Counters

•Meters

•Histograms

•Timers

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MetricsTypes:

•Gauges

•Counters

•Meters

•Histograms

•Timers

•Health Checks

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MetricsTypes:

•Gauges

•Counters

•Meters

•Histograms

•Timers

•Health Checks

Reporters:

•STDOUT

•CSV

•SLF4J

•JMX

•Graphite

•Ganglia

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Counters, meters… vs.

Gauges

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Aggregation

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source: codeascraft.com

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You can also check out• collectd https://collectd.org

• StatsD https://github.com/etsy/statsd/

• Riemman http://riemann.io/

• Twitter’s Ostrich https://github.com/twitter/ostrich

• Ganglia http://ganglia.sourceforge.net/

• Dashboards: http://shopify.github.io/dashing/ https://github.com/obfuscurity/descarteshttps://github.com/obfuscurity/dusk

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Event Sourcing

Tracing and storing all the events

Current app state: replaying the stream

Great for data mining and analysis

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Log aggregation

Less invasive way to build an “event stream”

Logs are data with plenty of value

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Log aggregation

Log source

Log source

Log source

Central storage

Query engine

Web view

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Logstash

Open Source (written in JRuby)

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Logstash

Open Source (written in JRuby)

Gathers logs from various inputs

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Logstash

Open Source (written in JRuby)

Gathers logs from various inputs

Parses and extracts metadata

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Logstash

Open Source (written in JRuby)

Gathers logs from various inputs

Writes to various outputs

Parses and extracts metadata

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Logstash

Similar tools: !Splunk, Graylog, Fluentd, log.io

Open Source (written in JRuby)

Gathers logs from various inputs

Writes to various outputs

Parses and extracts metadata

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Logstash centralized architecture

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Logstash grok

2013-11-10 19:41:25.321 [main] INFO o.a.camel.impl.DefaultCamelContext !- Apache Camel 2.11.1 (CamelContext: camel-1) started in 4.450 seconds

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Logstash grok

2013-11-10 19:41:25.321 [main] INFO o.a.camel.impl.DefaultCamelContext !- Apache Camel 2.11.1 (CamelContext: camel-1) started in 4.450 seconds

time 2013-11-10 19:41:25.321

thread main

loglevel INFO

source o.a.camel.impl.DefaultCamelContext

message Apache Camel 2.11.1 (CamelContext: camel-1) started in 4.450 seconds

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Logstash simple use cases

Output: e-mail alert

ExceptionsSecurity issuesRare and business-meaningful events

Grok:

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Kibana

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Kibana checking general app activity

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Kibana Spotting anomalies

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Kibana Checking regular events

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Kibana How often is this feature used?

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Kibana Displaying multiple query results

Query: exception Type: applog

Query: index Type: mongolog

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References• Graphite http://graphite.readthedocs.org/en/latest/

• Yammer Metrics http://metrics.codahale.com/

• Logstash http://logstash.net/

• Surfing the event stream by Sam Newman at Geecon http://www.slideshare.net/spnewman/surfing-the-event-stream

• Lessons from Building and Scaling LinkedIn by Jay Krepshttp://www.infoq.com/presentations/linkedin-architecture-stack

• Code as Craft http://codeascraft.com/

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Reach us at: @maciejb and @kpciesielski

softwaremill.comThank You