Sample OpenFaaS Go Function (classic template) ready to run as a Docker Dev Environment.

(Part of the blog post https://felipecruz.es/making-a-docker-dev-environment-for-openfaas/)

This repository is configured to run as a Docker Dev Environment using the base image specified here.

Once you create a Docker Dev Environment, you won't have to download any further tools or dependencies to play around with this example.

You will have all the developer tooling to develop, build, and push your OpenFaaS function, baked within the development container. Note that you can also use kind to create a Kubernetes cluster in Docker to provision the infrastructure where to install OpenFaaS.

Update the Kubernetes API server address to your host's in kind.yml. This is needed for the dev container to communicate with the KinD cluster. Otherwise, kubectl commands against the API server won't work.

Create the Kubernetes cluster in Docker

kind create cluster --config=kind.yml

Install OpenFaaS

arkade install openfaas

Forward the gateway to your machine

kubectl rollout status -n openfaas deploy/gateway
kubectl port-forward -n openfaas svc/gateway 8080:8080 &

Login to OpenFaaS Gateway

# If basic auth is enabled, you can now log into your gateway:
PASSWORD=$(kubectl get secret -n openfaas basic-auth -o jsonpath="{.data.basic-auth-password}" | base64 --decode; echo)
echo -n $PASSWORD | faas-cli login --username admin --password-stdin

Visit http://127.0.0.1:8080/ to see the OpenFaaS Gateway.

Build the function

faas-cli build -f go-fn.yml

Push the function. Make sure you run docker login inside the development container and update the username and repository name in go-fn.yml to yours. Remember to set up authentication in KinD to pull images from your newly created DockerHub repository or, otherwise, make the DockerHub repository public.

faas-cli push -f go-fn.yml

Deploy the function to the OpenFaaS Gateway

faas-cli deploy -f go-fn.yml