A tiny internet software Golang showcases finest practices of working microservices in Kubernetes

Podinfo is a tiny internet software made with Go that showcases the perfect practices of working microservices in Kubernetes. Podinfo is utilized by CNCF initiatives like Flux and Flagger for end-to-end testing and workshops.

Golang Challenge Specs

• Well being checks (readiness and liveness)
• Sleek shutdown on interrupt indicators
• File watcher for secrets and techniques and configmaps
• Structured logging with zap
• 12-factor app with viper
• Fault injection (random errors and latency)
• Instrumented with Prometheus and Open Telemetry
• Swagger docs
• CUE, Helm and Kustomize installers
• Finish-to-Finish testing with Kubernetes Form and Helm
• Kustomize testing with GitHub Actions and Open Coverage Agent
• Multi-arch container picture with Docker buildx and Github Actions
• Container picture signing with Sigstore cosign
• CVE scanning with Trivy

Go Net API:

• GET / prints runtime data
• GET /model prints podinfo model and git commit hash
• GET /metrics return HTTP requests length and Go runtime metrics
• POST /readyz/allow indicators the Kubernetes LB that this occasion is able to obtain site visitors
• POST /readyz/disable indicators the Kubernetes LB to cease sending requests to this occasion
• GET /healthz utilized by Kubernetes liveness probe
• GET /readyz utilized by Kubernetes readiness probe
• GET /standing/{code} returns the standing code
• GET /panic crashes the method with exit code 255
• POST /echo forwards the decision to the backend service and echos the posted content material
• GET /env returns the setting variables as a JSON array
• GET /headers returns a JSON with the request HTTP headers
• GET /delay/{seconds} waits for the desired interval
• POST /token points a JWT token legitimate for one minute JWT=$(curl -sd 'anon' podinfo:9898/token | jq -r .token)
• GET /token/validate validates the JWT token curl -H "Authorization: Bearer $JWT" podinfo:9898/token/validate
• GET /configs returns a JSON with configmaps and/or secrets and techniques mounted within the config quantity
• POST/PUT /cache/{key} saves the posted content material to Redis
• GET /cache/{key} returns the content material from Redis if the important thing exists
• DELETE /cache/{key} deletes the important thing from Redis if exists
• POST /retailer writes the posted content material to disk at /information/hash and returns the SHA1 hash of the content material
• GET /retailer/{hash} returns the content material of the file /information/hash if exists
• GET /ws/echo echos content material through websockets podcli ws ws://localhost:9898/ws/echo
• GET /chunked/{seconds} makes use of transfer-encoding sort chunked to offer a partial response after which waits for the desired interval
• GET /swagger.json returns the API Swagger docs, used for Linkerd service profiling and Gloo routes discovery

Golang gRPC API

• /grpc.well being.v1.Well being/Examine well being checking