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Governance Policy Propagator KinD testsLicense

Description

The governance policy propagator is a controller that watches Policies, PlacementBindings, and PlacementRules. It manages replicated Policies in cluster namespaces based on the PlacementBindings and PlacementRules, and it updates the status on Policies to show aggregated cluster compliance results.

The operator watches for changes to trigger a reconcile:

  1. Changes to Policies in non-cluster namespaces trigger a self reconcile.
  2. Changes to Policies in cluster namespaces trigger a root Policy reconcile.
  3. Changes to PlacementBindings trigger reconciles on the subject Policies.
  4. Changes to PlacementRules trigger reconciles on subject Policies.

Every reconcile does the following:

  1. Creates/updates/deletes replicated policies in cluster namespaces based on PlacementBinding/PlacementRule results.
  2. Creates/updates/deletes the policy status to show aggregated cluster compliance results.

Getting started

Go to the Contributing guide to learn how to get involved.

Check the Security guide if you need to report a security issue.

Changes to the deploy YAML files

The YAML files in the deploy directory are autogenerated by Kubebuilder and Kustomize. After code changes that affect the YAML files, the YAML files can be regenerated with make generate-operator-yaml.

Build and deploy locally

You will need kind installed.

  1. Create the Kind cluster
    make kind-bootstrap-cluster-dev
  2. Start the propagator:
    • Run in a pod on the cluster:
      make build-images
      make kind-deploy-controller-dev
    • Run locally:
      make run

Running tests

make test-dependencies
make test

make e2e-dependencies
make e2e-test

How to run webhook locally

--enable-webhooks=true

Limit: If you want to run the webhook locally, you need to generate certificates and place them in /tmp/k8s-webhook-server/serving-certs/tls.{crt,key}. If you’re not running a local API server, you’ll also need to figure out how to proxy traffic from the remote cluster to your local webhook server. For this reason, Kubebuilder generally recommends disabling webhooks when doing your local code-run-test cycle. To disable it, please supply the --enable-webhooks=false argument when running the controller. For more information, visit https://book.kubebuilder.io/cronjob-tutorial/running.html

Clean up

make kind-delete-cluster

Updating Deployment resources

Some of the deployment resources are generated by kubebuilder - the crds are generated into ./deploy/crds and the rbac details from kubebuilder comments are compiled into ./deploy/rbac/role.yaml. Other details are managed independently - in particular, the details in ./deploy/manager/manager.yaml. When any of those details need to be changed, the main deployment yaml ./deploy/operator.yaml must be regenerated through the make generate-operator-yaml target. The ./deploy/operator.yaml SHOULD NOT be manually updated.

Running the Compliance Events API

Create the KinD cluster and install Postgres with the following commands:

make kind-bootstrap-cluster-dev

You can connect to the Postgres server with the following command:

psql "host=localhost dbname=ocm-compliance-history user=grc password=grc"

Run the Governance Policy Propagator with the following command:

WATCH_NAMESPACE="" WATCH_NAMESPACE_COMPLIANCE_EVENTS_STORE="open-cluster-management" go run main.go --leader-elect=false  --enable-webhooks=false

References

  • The governance-policy-propagator is part of the open-cluster-management community. For more information, visit: open-cluster-management.io.

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