A Practical Guide to Prometheus for App Developers

I've presented this deck at Docker meetup in San Francisco.

See https://github.com/errordeveloper/prom-nodejs-demo/blob/v0-start/README.DOCKER.md for instructions.

Transcript

1. @errordeveloper A Practical Guide to Prometheus for App Developers
2. outline: – theory – tutorial
3. Prometheus PromQL and alerts MyApp Prometheus GET /metrics remote_write Deploy App to Docker Swarm
4. Prometheus: what is it?
5. Prometheus: how it works?
6. Prometheus: say more?
7. > curl http://localhost:8080/metrics ... # HELP process_starttime_seconds The starttime of the Java virtual machine # TYPE process_starttime_seconds gauge process_starttime_seconds 1.506735317456E9 # HELP process_uptime_seconds The uptime of the Java virtual machine # TYPE process_uptime_seconds gauge process_uptime_seconds 145236.015
8. > curl http://localhost:8080/metrics ... # HELP http_requests_duration_seconds Timer of servlet request # TYPE http_requests_duration_seconds summary http_requests_duration_seconds_count{method="GET",status=" 200",uri="/"} 2.0 http_requests_duration_seconds_sum{method="GET",status="20 0",uri="/"} 0.05230485
9. process_uptime_seconds
10. process_uptime_seconds{job=“myapp”}
11. http_requests_duration_seconds_count
12. http_requests_duration_seconds_count{ job=“myapp”, method=“GET”, uri=“/”, }
13. sum( http_requests_duration_seconds_count{ job=“myapp”, method=“GET”, uri=“/”, } )
14. sum( rate( http_requests_duration_seconds_count{ job=“myapp”, method=“GET”, uri=“/”, }[1m] ) )
15. up
16. up{job=“myapp"}
17. sum( up{job=“myapp"} ) by (job)
18. tutorial: step-by-step guide to Prometheus with Node.js http://github.com/errordeveloper/prom-nodejs-demo
19. cloud.weave.works
20. ilya@weave.works slack.weave.works