Monitor My Socks: Using Prometheus in a Polyglot Open Source Microservices
summary
Shows a working integration of Prometheus into the polyglot Sock Shop (Go, Java Spring Boot, Node/Express) with deployed manifests for Kubernetes and minikube, Grafana dashboards and Alertmanager hooked to Slack. Recommends RED metrics with histograms over summaries (define buckets, global metrics, and route-based labels to avoid high cardinality), implements middleware/interceptors to time HTTP calls, and demonstrates ~37,000 orders in the demo. Also highlights a hosted multi-tenant option Cortex backed by S3 and gives practical tips like 2–4 GB RAM for local minikube.
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chapters (21)
- 0:00Intro
- 1:15Cortex
- 1:45How do you do monitoring?
- 3:30Obnoxiously Polyglot
- 6:06Prometheus Libraries
- 7:23Metric definition
- 12:48Middleware definition
- 14:46Main Wiring
- 14:59Main Middleware
- 16:21First - the easy bit
- 17:35Timing - Easy option
- 18:30Timing - Intermediate option
- 18:51Timing - Current Implementation
- 19:09Timing - The nasty bit
- 20:04NodeJS - Express
- 21:29Deploying all the things
- 21:44Deploying to Kubernetes
- 22:47Rock it with Minikube
- 24:46Bonus: Grafana!
- 27:47Alertmanager manifest
- 31:02Alert rules
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