use sync.yaml -> config to load some CRDs to evaluate my OPA Gatekeeper in EKS

[peteroneilljr]

Original Requestor: raje.g.995
Original Thread: https://openpolicyagent.slack.com/archives/CBR63TK2A/p1648828146.908049

Message:

Hi, I am trying to use sync.yaml -> config to load some CRDs to evaluate my OPA Gatekeeper in EKS.

I am facing issues in loading those CRDS. I have installed the sync.yaml correctly.

Steps followed -

Installed OPA
Installed sync.yaml to load the CRDs dynamically.

Issue :

While evaluating the policy in the constrainttemplate , OPA is not able to list those objects.

Sample sync.yaml

# Sync.yaml
apiVersion: http://config.gatekeeper.sh/v1alpha1config.gatekeeper.sh/v1alpha1>
kind: Config
metadata:
  name: config
  namespace: "gatekeeper-system"
spec:
  sync:
    syncOnly:
      - group: "http://project.team.orchestrator.predix.ioproject.team.orchestrator.predix.io>"
        version: "v1alpha1"
        kind: Environment
      - group: "http://project.team.orchestrator.predix.ioproject.team.orchestrator.predix.io>"
        version: "v1alpha1"
        kind: "DeveloperProjectControl"

Sample policy constrainttemplate

apiVersion: http://templates.gatekeeper.sh/v1beta1templates.gatekeeper.sh/v1beta1>
kind: ConstraintTemplate
metadata:
  name: developerprojectcontrolnotexist
spec:
  crd:
    spec:
      names:
        kind: DeveloperProjectControlNotExist

  targets:
    - target: admission.k8s.gatekeeper.sh
      rego: |
        package developerprojectcontrolnotexist

        violation[{"msg": msg1}] {
              input.review.object.kind != "DeveloperProjectControl"
              ns := input.review.object.metadata.namespace

              ns != "NS"
             #msg1 := sprintf("VALUE - %v ", [data.inventory.namespace[ns]["http://project.team.orchestrator.predix.io/v1alpha1project.team.orchestrator.predix.io/v1alpha1>"]])
             dpcObject := object.get(data.inventory.namespace[ns]["http://project.team.orchestrator.predix.io/v1alpha1project.team.orchestrator.predix.io/v1alpha1>"],"DeveloperProjectControl", "NOTFOUND")
             dpcObject == "NOTFOUND"
             msg1 := sprintf("No developerprojectcontrol object present in the namespace  ", [dpcObject])
        }

Here the dpcObject value is {} and instead of NOTFOUND , when the corresponding object - DeveloperProjectControl is not present in the namespace.