This composition function returns whatever you tell it to.
Provide a YAML-serialized RunFunctionResponse as the function's input.
The response's desired object will be merged onto any desired state that was
passed to the function using proto.Merge semantics.
Here's an example:
apiVersion: apiextensions.crossplane.io/v1
kind: Composition
metadata:
name: test-crossplane
spec:
compositeTypeRef:
apiVersion: example.crossplane.io/v1beta1
kind: XR
pipeline:
- step: return-some-results
functionRef:
name: function-dummy
input:
apiVersion: dummy.fn.crossplane.io/v1beta1
kind: Response
response:
desired:
composite:
resource:
status:
widgets: 200
connectionDetails:
very: secret
resources:
cool-resource:
resource:
apiVersion: example.org/v1
kind: Composed
spec: {} # etc...
ready: READY_TRUE
results:
- severity: SEVERITY_NORMAL
message: "I did the thing!"See the example directory for an example you can run locally using the Crossplane CLI:
$ crossplane beta render xr.yaml composition.yaml functions.yamlSee the composition functions documentation to learn more
about crossplane beta render.
This function uses Go, Docker, and the Crossplane CLI to build functions.
# Run code generation - see input/generate.go
$ go generate ./...
# Run tests - see fn_test.go
$ go test ./...
# Build the function's runtime image - see Dockerfile
$ docker build . --tag=runtime
# Build a function package - see package/crossplane.yaml
$ crossplane xpkg build -f package --embed-runtime-image=runtime
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