Buildpack in a Pod

This demonstrates running CNCF Buildpacks in a regular Kubernetes Pod.

This is effectively what Tekton, Shipwright, kpack and others do, without all that ornamentation and friendliness.

1. Set up registry credentials

kubectl create secret generic regcred \
    --from-file=.dockerconfigjson=~/.docker/config.json \
    --type=kubernetes.io/dockerconfigjson

Note: Registry credentials must be basic username/password credentials. Credential helpers are not supported.

2. Run the build

kubectl create -f buildpack-pod.yaml

This will create a new Pod with a randomly generated name like buildpacks-a1db2

3. Watch logs

kubectl logs buildpacks-a1db2 -f 

4. See the built image digest

kubectl get pod buildpacks-a1db2 -ojsonpath="{.status.containerStatuses[0].state.terminated.message}"