You can symmetrically uninstall OLM as you did to install it. Specifically all OLM resources in crds.yaml and olm.yaml should be deleted. The apiservices should be removed as the first step, preventing it from becoming a dangling resource.
Uninstalling OLM does not necessarily clean up the operators it maintained. Please clean up installed operator resources before uninstalling OLM, especially for resources that do not have an owner reference.
For uninstalling release versions of OLM, you can use the following commands:
export OLM_RELEASE=<olm-release-version>
kubectl delete apiservices.apiregistration.k8s.io v1.packages.operators.coreos.com
kubectl delete -f https://github.com/operator-framework/operator-lifecycle-manager/releases/download/${OLM_RELEASE}/crds.yaml
kubectl delete -f https://github.com/operator-framework/operator-lifecycle-manager/releases/download/${OLM_RELEASE}/olm.yaml
NOTE: You can identify which version of OLM you are using by inspecting the version of the packageserver CSV.
export OLM_NAMESPACE=<olm-namespace> kubectl -n $OLM_NAMESPACE get csvs NAME DISPLAY VERSION REPLACES PHASE packageserver Package Server 0.13.0 Succeeded
You can also uninstall OLM from the master branch of the operator-framework/operator-lifecycle-manager repository with the following:
kubectl delete apiservices.apiregistration.k8s.io v1.packages.operators.coreos.com
kubectl delete -f https://raw.githubusercontent.com/operator-framework/operator-lifecycle-manager/master/deploy/upstream/quickstart/crds.yaml
kubectl delete -f https://raw.githubusercontent.com/operator-framework/operator-lifecycle-manager/master/deploy/upstream/quickstart/olm.yaml
Primarily, you can check that OLM has been uninstalled by checking the OLM namespace.
kubectl get namespace $OLM_NAMESPACE
Error from server (NotFound): namespaces "$OLM_NAMESPACE" not found
More specifically, you can verify that OLM has been uninstalled successfully by making sure that OLM owned CustomResourceDefinitions are removed:
kubectl get crd | grep operators.coreos.com
You can also check that the OLM deployments are terminated:
kubectl get deploy -n $OLM_NAMESPACE
No resources found.
The role and rolebinding in the OLM namespace are removed:
kubectl get role -n $OLM_NAMESPACE
No resources found.
kubectl get rolebinding -n $OLM_NAMESPACE
No resources found.
At last, the OLM namespace should also be terminated.