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Exclude Source Scanner from source-test-scan-to-url Supply Chain in Tanzu Application Platform

🗃 {Dev/CaaS/Kubernetes/TAP}
🏷 Kubernetes 🏷 Cartographer 🏷 Grype 🏷 Tanzu 🏷 TAP 🏷 ytt 
🗓 Updated at 2022-12-16T05:12:51Z  🗓 Created at 2022-12-16T04:31:11Z   🇯🇵 Original entry

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How to exclude Source Scanner using ytt overlay when Image Scanner is sufficient for vulnerability scanning in source-test-scan-to-url Supply Chain and Source Scanner is unnecessary

Create an overlay

cat <<EOF > ootb-supply-chain-testing-scanning-remove-source-scanner.yaml
#@ load("@ytt:overlay", "overlay")
#@overlay/match by=overlay.subset({"metadata":{"name":"source-test-scan-to-url"}, "kind": "ClusterSupplyChain"})
  #@overlay/match by="name"
  - name: source-scanner
  #@overlay/match by="name"
  - name: image-provider
    #@overlay/match by="name"
    - name: source
      resource: source-tester

Register the overlay as a Secret. The following should be done for Build Cluster in case of Multi Cluster topology.

kubectl -n tap-install create secret generic ootb-supply-chain-testing-scanning-remove-source-scanner \
  -o yaml \
  --dry-run=client \
  --from-file=ootb-supply-chain-testing-scanning-remove-source-scanner.yaml \
  | kubectl apply -f-

Set the Secret name of the created overlay above to package_overlays in tap-values.yaml as follows.

# ...
- name: ootb-supply-chain-testing-scanning
  - name: ootb-supply-chain-testing-scanning-remove-source-scanner 
  # ...

Update the packageinstall

tanzu package installed update -n tap-install tap -f tap-values.yaml

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