crossplane-study/examples/08-application/composition.yaml at main · Tycho-1/crossplane-study · GitHub

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# Composition: XApp -> Deployment + Service (Kubernetes application)
# v2: compose any resource; Crossplane needs RBAC for deployments and services
apiVersion: apiextensions.crossplane.io/v1
kind: Composition
metadata:
  name: xapp-application
spec:
  compositeTypeRef:
    apiVersion: example.org/v1alpha1
    kind: XApp
  mode: Pipeline
  pipeline:
    - step: create-application
      functionRef:
        name: function-patch-and-transform
      input:
        apiVersion: pt.fn.crossplane.io/v1beta1
        kind: Resources
        resources:
          - name: deployment
            base:
              apiVersion: apps/v1
              kind: Deployment
              spec:
                replicas: 1
                selector:
                  matchLabels: {}
                template:
                  metadata:
                    labels: {}
                  spec:
                    containers:
                      - name: app
                        image: nginx
                        ports:
                          - containerPort: 80
            patches:
              - type: FromCompositeFieldPath
                fromFieldPath: spec.replicas
                toFieldPath: spec.replicas
              - type: FromCompositeFieldPath
                fromFieldPath: spec.image
                toFieldPath: spec.template.spec.containers[0].image
              - type: FromCompositeFieldPath
                fromFieldPath: spec.port
                toFieldPath: spec.template.spec.containers[0].ports[0].containerPort
              - type: FromCompositeFieldPath
                fromFieldPath: metadata.name
                toFieldPath: spec.selector.matchLabels[app]
              - type: FromCompositeFieldPath
                fromFieldPath: metadata.name
                toFieldPath: spec.template.metadata.labels[app]
          - name: service
            base:
              apiVersion: v1
              kind: Service
              spec:
                ports:
                  - port: 80
                    targetPort: 80
                selector: {}
            patches:
              - type: FromCompositeFieldPath
                fromFieldPath: metadata.name
                toFieldPath: spec.selector[app]
              - type: FromCompositeFieldPath
                fromFieldPath: spec.port
                toFieldPath: spec.ports[0].port
              - type: FromCompositeFieldPath
                fromFieldPath: spec.port
                toFieldPath: spec.ports[0].targetPort