Merge pull request kubernetes#84599 from mrobson/log-destroy

Errors from cgroup destroy are swallowed. Log error at warning level.

Author: k8s-ci-robot

pkg/kubelet/cm/pod_container_manager_linux.go

@@ -187,7 +187,7 @@ func (m *podContainerManagerImpl) tryKillingCgroupProcesses(podCgroup CgroupName
 func (m *podContainerManagerImpl) Destroy(podCgroup CgroupName) error {
 	// Try killing all the processes attached to the pod cgroup
 	if err := m.tryKillingCgroupProcesses(podCgroup); err != nil {
-		klog.V(3).Infof("failed to kill all the processes attached to the %v cgroups", podCgroup)
+		klog.Warningf("failed to kill all the processes attached to the %v cgroups", podCgroup)
 		return fmt.Errorf("failed to kill all the processes attached to the %v cgroups : %v", podCgroup, err)
 	}
 
@@ -197,6 +197,7 @@ func (m *podContainerManagerImpl) Destroy(podCgroup CgroupName) error {
 		ResourceParameters: &ResourceConfig{},
 	}
 	if err := m.cgroupManager.Destroy(containerConfig); err != nil {
+		klog.Warningf("failed to delete cgroup paths for %v : %v", podCgroup, err)
 		return fmt.Errorf("failed to delete cgroup paths for %v : %v", podCgroup, err)
 	}
 	return nil