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Librato's Joseph Ruscio at Heroku's 2013: Instrumenting 12-Factor Apps
The document discusses the Twelve-Factor App methodology, focusing on decoupling applications from their environments and implementing effective instrumentation during development. It highlights the importance of metrics collection, monitoring for operational effectiveness, and the use of various tools for data reporting and logging. Key practices include defining service operating ranges, storing metrics in a common repository, and refining the signal-to-noise ratio to enhance observability.
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Librato's Joseph Ruscio at Heroku's 2013: Instrumenting 12-Factor Apps
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- 4. Twelve Factor App •Decouple app from environment • Service Oriented Architecture • Continuous Deployment • Horizontal Scaling
- 5. ? How do we validate the effects of a deployment?
- 6. ? How do we detect aberrations?
- 7. ? How do we determine when to scale?
- 8. ? How do accomplish this with ephemeral processes?
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- 11. Instrumentation is Unit Testing for Operations
- 12. Counter #enqueue a job Foo.counter('mygem.jobs').increment #completea job Foo.counter('mygem.jobs').decrement
- 13. Timer # block form Foo.timer('req.foo').timedo process_request end # explicit form t = Foo.timer('req.bar').time process_request t.stop
- 14. Decouple collection fromreporting
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- 18. Logs • logplex • l2met •logstash, greylog2 • Splunk, Papertrail, et al
- 19. Process Reporter Request Metrics Thread Registry Reporter Thread Process
- 20. Process Reporter • CodaHaleMetrics (JVM) • metriks (Ruby) • folsom (Erlang) • librato-rails, librato-rack
- 21. UDP Nginx Unicorn StatsD Front-End
- 22. Store metrics ina common repository
- 23. Anti-Pattern Storage Storage Storage ... • Ping • CPU • CPU • Interface • Custom Stats • Memory • Memory • MySQL threads • Disks • Ping • VMstat • SNMP Service • Battery charge • .... • .... • .... Project X Project Y Project Z
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- 29. Time Series Datastores •RRDTool • Graphite (Whisper) • OpenTSDB (HBase) • Librato et. al (SaaS)
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- 35. “No aberration detection mechanismis more sophisticated than your VP Marketing staring at a dashboard whilst drinking coffee.”
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- 38. Signal ------------ Noise
- 39. • Instrument duringdevelopment • Decouple collection from reporting • Store metrics in a common repository • Define per-service thresholds • Collaborate through dashboards • Iterate and refine
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