Log analysis for your Heroku app 

Eric Lindvall @lindvall github.com/eric 

Papertrail 

Watch your application from a browser 

Search for problems 

Jump to when something happened 

See all of your apps in one place 

Create alerts to act on your searches Have them run every minute, hour or day 

Send important messages to Campfire 

Send nightly reports in email 

Notify PagerDuty when something is wrong 

Graph message counts in Librato Metrics 

Papertrail alert webhooks are open source https://github.com/papertrail/papertrail-services 

Run your own webhook on Heroku 

Automatically scale dynos based on queue time IDEA 

Alert your iPhone when too many errors occur IDEA 

Use a webhook to collect app metrics from Metriks EXAM PLE https://github.com/eric/metriks https://github.com/eric/metriks_log_webhook 

Metriks.timer('fib.time').time do fib(15) end Turn Measurements into logs Apr 17 06:09:01 app app/web.1: metriks: time=1334668140 name=fib.time type=timer count=23348919 one_minute_rate=76.0977078982827 five_minute_rate=68.1730503588775 fifteen_minute_rate=62.5690560606605 mean_rate=39.3749046450413 min=0.0100461 max=121.660915185 mean=0.0643679864834903 stddev=0.051298728482402 median=0.018409955 95th_percentile=0.1440550285 Apr 17 06:09:01 app app/web.2: metriks: time=1334668140 name=fib.time type=timer count=13894859 one_minute_rate=23.9993183538984 five_minute_rate=31.6901486523292 fifteen_minute_rate=35.0794473490055 mean_rate=23.4224094363587 min=0.00994003 max=123.195304423 mean=0.0397875258344949 stddev=0.0213955001420874 median=0.015471635 95th_percentile=0.0905222869999997 

Turn Logs into graphs Apr 17 06:09:01 app app/web.1: metriks: time=1334668140 name=fib.time type=timer count=23348919 one_minute_rate=76.0977078982827 five_minute_rate=68.1730503588775 fifteen_minute_rate=62.5690560606605 mean_rate=39.3749046450413 min=0.0100461 max=121.660915185 mean=0.0643679864834903 stddev=0.051298728482402 median=0.018409955 95th_percentile=0.1440550285 Apr 17 06:09:01 app app/web.2: metriks: time=1334668140 name=fib.time type=timer count=13894859 one_minute_rate=23.9993183538984 five_minute_rate=31.6901486523292 fifteen_minute_rate=35.0794473490055 mean_rate=23.4224094363587 min=0.00994003 max=123.195304423 mean=0.0397875258344949 stddev=0.0213955001420874 median=0.015471635 95th_percentile=0.0905222869999997 

Heroku metriks_log_webhook (sinatra app) Rails app (with metriks gem) Papertrail Librato Metrics Papertrail webhook logs to Papertrail How it all fits together 

Questions? 

All of the links Get a free account: https://papertrailapp.com/ Talk to us: https://papertrailapp.com/chat Send logs from your heroku app: https://papertrailapp.com/help/heroku Ask us questions: https://help.papertrailapp.com/ Webhook documentation: http://help.papertrailapp.com/kb/how-it-works/web-hooks Read the papertrail-services source: https://github.com/papertrail/papertrail-services/ See an example custom webhook: https://github.com/eric/metriks_log_webhook/ Download this presentation: http://speakerdeck.com/u/lindvall/p/log-analysis-for-your-heroku-app 

Thanks!