Symptom
Use Rancher2.0 agents Kubernetes management web page. For an unknown reason, Rancher service can not be enabled, deleted Rancher dependent namespace (cattle-system), the state has been Terminating.
Solution
kubectl patch namespace cattle-system -p '{"metadata":{"finalizers":[]}}' --type='merge' -n cattle-system
kubectl delete namespace cattle-system --grace-period=0 --force
kubectl patch namespace cattle-global-data -p '{"metadata":{"finalizers":[]}}' --type='merge' -n cattle-system
kubectl delete namespace cattle-global-data --grace-period=0 --force
kubectl patch namespace local -p '{"metadata":{"finalizers":[]}}' --type='merge' -n cattle-system
for resource in `kubectl api-resources --verbs=list --namespaced -o name | xargs -n 1 kubectl get -o name -n local`; do kubectl patch $resource -p '{"metadata": {"finalizers": []}}' --type='merge' -n local; done
kubectl delete namespace local --grace-period=0 --force