build.yaml

# A kubernetes Job that builds a Docker image based on python:3.12 using buildah
apiVersion: batch/v1
kind: Job
metadata:
  name: build-python-image
spec:
  backoffLimit: 4
  template:
    spec:
      initContainers:
      - name: git-sync
        image: alpine/git
        command: ["git", "clone", "--depth", "1", "https://github.com/par-tec/argocd-task.git", "/app"]
        volumeMounts:
        - name: dockerfile
          mountPath: /app
      containers:
      - name: build-python-image
        image: quay.io/buildah/stable:latest
        command: ['sh', '-c', 'buildah bud -t my-python-image:latest .']
        volumeMounts:
        - name: varlibcontainers
          mountPath: /var/lib/containers
        - name: dockerfile
          mountPath: "/app"
      restartPolicy: Never
      volumes:
      - name: varlibcontainers
        emptyDir: {}
      - name: dockerfile
        emptyDir: {}

---
# A configmap with a script
# that:
# - clone a remote git repository
# - build a Docker image based on python:3.12 using buildah
apiVersion: v1
kind: ConfigMap
metadata:
  name: build-python-image-script
data:
  build-python-image.sh: |
    #!/bin/sh
    buildah bud -t my-python-image:latest .