Simple Concert Ticketing

This application is used for demonstrating the application instrumentation, especially trace and metrics.

Running it locally

Enable new relic (optional)

To enable new relic instrumentation:

1. Create free newrelic account and grab the license key.

2. Set these following env var:

   • OTEL_NEW_RELIC_EXPORTER_OTLP_ENDPOINT to https://otlp.nr-data.net:4317
   • OTEL_NEW_RELIC_EXPORTER_API_KEY to ingest license key from newrelic account

Enable Google Cloud Tracing and Monitoring

1. Create GCP service account and ensure that service account has (at minimum) roles/monitoring.metricWriter and roles/cloudtrace.agent role.

2. Update value of exporters.googlecloud.project in otel-config file to your google cloud project id/

Run Docker Compose

```shell
docker-compose up
```

Open Dashboard

1. Jaeger Tracing Dashboard: http://127.0.0.1:16686/
2. Prometheus Dashboard: http://127.0.0.1:9090/
3. Grafana Dashboard: http://127.0.0.1:3000/
4. Asynqmon Dashboard: http://127.0.0.1:8011/
5. Newrelic dashboard (optional)
6. Google Cloud Monitoring
7. Google Cloud Tracing

Run load generator

1. Install hey

2. Run load generator

   hey -z 1m -c 2 -q 2  -m POST -d '{"show_id": "b9b0d5da-98a4-4b09-b5f5-83dc0c3b9964"}' http://localhost:9999/api/v1/booking
   hey -z 1m -c 2 -q 2  -m POST -d '{"show_id": "b9b0d5da-98a4-4b09-b5f5-83dc0c3b9964"}' http://localhost:9999/api/v2/booking

Running it on kubernetes

WARNING: This setup is not properly documented.

1. Setup CloudSQL Postgres Instance. Update secret.yaml.example, app.yaml, and worker.yaml with correct value for database config.

   docker run -d \
       -v ${PWD}/hack/observability/secrets/psql-local.json:/config/key.json \
       -p 127.0.0.1:5432:5432 \
       gcr.io/cloudsql-docker/gce-proxy:1.31.0 /cloud_sql_proxy \
       -instances=io-extended-2022:asia-southeast1:booking=tcp:0.0.0.0:5432 -credential_file=/config/key.json

2. Install bitnami/helm chart

   helm repo add bitnami https://charts.bitnami.com/bitnami
   helm install redis --namespace redis --values redis-values.yml bitnami/redis

3. Apply all manifest in k8s directory.

4. Port forward prometheus dashboard

    kubectl -n gmp-test port-forward svc/frontend 9091:9090

5. Run load test

   k apply -f k8s/hey.yaml

Demo Script

hey -n 1 -c 1 -q 1  -m POST -d '{"show_id": "b9b0d5da-98a4-4b09-b5f5-83dc0c3b9964"}' http://localhost:9999/api/v1/booking

hey -z 5s -c 100 -m POST -d '{"show_id": "b9b0d5da-98a4-4b09-b5f5-83dc0c3b9964"}' http://localhost:9999/api/v1/booking