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chore(deps): pin dependencies#24
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Added:
- github.com/rabbitmq/amqp091-go client library
- /rabbitmq/status endpoint - connection status + consumed messages
- /rabbitmq/publish endpoint - publish messages (GET or POST)
- Background consumer goroutine for demo queue
- Prometheus metrics: epochcloud_rabbitmq_{messages_published,messages_consumed,publish_errors,connected}_total
- HTML template: RabbitMQ Demo section
Features:
- Graceful handling when RabbitMQ not configured (optional)
- Auto-ack consumer with last 10 messages stored
- Trace ID correlation in messages
- OpenTelemetry spans for all RabbitMQ operations
Env vars (optional):
- RABBITMQ_HOST, RABBITMQ_PORT, RABBITMQ_USERNAME
- RABBITMQ_PASSWORD, RABBITMQ_VHOST, RABBITMQ_URI, RABBITMQ_QUEUE
The app now runs a background connection manager that: - Retries connection with exponential backoff (1s to 30s) - Automatically reconnects when connection is lost - Uses NotifyClose to detect connection drops - Non-blocking startup (app starts immediately, connects when RabbitMQ is ready) This makes the app resilient to RabbitMQ being unavailable at startup.
When CONSUMER_MODE=true: - Only consumes messages from RabbitMQ queue - HTTP server runs minimal endpoints (/health, /metrics only) - No /rabbitmq/publish or other producer endpoints This enables: - Separate consumer pods scaled by KEDA based on queue depth - Producer pods that only publish (don't consume own messages) - True microservices pub/sub pattern demonstration
Valkey may not be ready immediately during pod startup, especially with Linkerd mTLS. Added retry logic (5 attempts, exponential backoff 1s→16s) to handle transient connection failures.
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Pull request overview
This PR pins Docker base image dependencies by adding SHA256 digests to ensure reproducible builds and enhance supply chain security. Renovate bot has automatically generated this change to lock the golang:1.24-alpine and alpine:3.21 images to specific versions.
Changes:
- Added SHA256 digest pinning to the golang:1.24-alpine builder image
- Added SHA256 digest pinning to the alpine:3.21 runtime image
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This PR contains the following updates:
c3f8e736b597b1Configuration
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