Learn OPENFAAS with Real Code Examples

Image processing function

Webhook listener for CI/CD

IoT sensor data aggregator

Automated email notifier

Serverless cron jobs for batch processing

Check function logs with `faas-cli logs <function>`

Verify Docker/Kubernetes setup

Ensure gateway is accessible

Check container image registry credentials

Validate stack.yml configuration

Test functions locally with `faas-cli up`

Invoke functions via CLI or HTTP locally

Use Docker logs to debug container issues

Unit test function code before containerization

Automate deployments with CI/CD pipelines

Deploy on Kubernetes with Helm chart

Deploy on Docker Swarm

Run locally with Docker Compose

Cloud deployment on AWS, GCP, or Azure

Edge deployment on IoT devices

faas-cli for building and deploying functions

OpenFaaS templates for multiple languages

Prometheus for metrics and monitoring

Grafana dashboards

Docker and Kubernetes for orchestration

HTTP endpoints

Message queues like NATS, Kafka, or RabbitMQ

Cron schedules

CI/CD pipelines (GitHub Actions, Jenkins)

Persistent storage via cloud volumes or databases

Reuse templates for multiple functions

Automate builds and deployments

Monitor function performance regularly

Keep functions stateless and modular

Use secrets management and configuration wisely

Managing container dependencies

Scaling large numbers of functions

Debugging functions in distributed environment

Cold-start latency optimization

Securing gateway and secrets