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  1. function-rds-metrics

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README.md

RDS Metrics Function Examples

You can run the RDS metrics function locally and test it using crossplane beta render with these example manifests.

Setup

  1. Create AWS credentials secret:
kubectl create secret generic aws-creds -n crossplane-system --from-file=credentials=$HOME/.aws/credentials --dry-run=client -o yaml | kubectl apply -f -
  1. Or use the example secret (for testing only):
kubectl apply -f secrets/aws-creds.yaml

Testing Scenarios

Basic Test

# Run the function locally
$ go run . --insecure --debug

# In another terminal, test basic functionality
$ crossplane render xr.yaml composition.yaml functions.yaml --function-credentials=secrets/aws-creds.yaml -rc

Custom Metrics Query

$ crossplane render custom-metrics-query/xr.yaml custom-metrics-query/composition.yaml functions.yaml --function-credentials=secrets/aws-creds.yaml -rc

Context Testing

$ crossplane render context-testing/xr.yaml context-testing/composition.yaml functions.yaml --function-credentials=secrets/aws-creds.yaml -rc

Dynamic Database Name from XR

$ crossplane render database-ref-from-xr/xr.yaml database-ref-from-xr/composition.yaml functions.yaml --function-credentials=secrets/aws-creds.yaml --include-context

Basic Metrics Query

$ crossplane render basic-metrics-query/xr.yaml basic-metrics-query/composition.yaml functions.yaml --function-credentials=secrets/aws-creds.yaml

Expected Output

The function should:

  1. Write RDS metrics to XR status at the specified target path
  2. Write metrics to pipeline context for downstream functions
  3. Set appropriate Crossplane conditions

Example successful output:

---
apiVersion: example.crossplane.io/v1
kind: XR
metadata:
  name: example-rds-metrics-test
status:
  rdsMetrics:
    databaseName: "example-rds-instance"
    region: "us-east-1"
    timestamp: "2025-01-26T..."
    metrics:
      CPUUtilization:
        value: 25.5
        unit: "Percent"
        timestamp: "2025-01-26T..."
---
apiVersion: render.crossplane.io/v1beta1
kind: Result
message: Successfully fetched metrics for RDS instance example-rds-instance
severity: SEVERITY_NORMAL
step: fetch-metrics
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