NodeJS in Production

Talk I gave at NodeJS meetup in Melbourne about running and monitoring applications in production.

Transcript

1. NodeJS In Production
   

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2. Some Background
   Ninjablocks has been using NodeJS for ~3 years
   Used in a range of web and realtime services
   Running on Heroku and AWS
   Also running on 1000s ARM devices
   

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3. Operational Visibility
   Add graphs for things business metrics!
   Add graphs for key system performance metrics
   Tune logging to remove noise
   Simple deterministic deployment process
   Error Monitoring
   

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4. Operational Visibility cont.
   Get a chat room for ops events, Engineering
   hipchat
   slack
   All events go to this room
   commits + deploys + badness + gifs
   

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5. Graphs
   Business Metrics!
   Orders, Payments and Signups
   CPU Usage / Load
   Memory Usage
   RSS (Resident Set Size) and V8 Heap Total / Used
   Event Loop Delay
   

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6. Logging
   What happened?
   When did this happen?
   Where in our codebase did this happen?
   File and Line Number
   Visible from anywhere and searchable
   

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7. Health Checks
   Health Checks
   SQL server connection status
   Redis connection status
   Anything your app depends on to operate
   

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8. Monitoring Suite
   Pager Duty
   Pingdom
   Librato
   Bugsnag
   

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9. Demo Code!
   

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10. Memory Leaks
    Every production node app I have seen has them
    V8 Memory leaks
    Buffer leaks (fragmentation)
    Everything is Lazy
    

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11. Eliminating Leaks
    v8 profiler, learn to use it
    node-tick (more links in readme)
    Watch the v8 tuning presentations!
    Why bother?
    

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12. Questions
    CTO at Ninja Blocks http://ninjablocks.com/
    @wolfeidau on twitter
    github.com/wolfeidau
    

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