TidbMonitor pods failed to be created when using CR

[weekface]

I create TiDB cluster using this command:

$ kubectl apply -f example/basic/

The TidbMonitor pod failed to be created, here is the tidb-controller-manager logs:

E0228 08:24:26.730170       1 tidb_monitor_controller.go:118] TidbMonitor: default/basic, sync failed, err: tidbcluster.pingcap.com "basic" not found
I0228 08:24:26.730689       1 event.go:255] Event(v1.ObjectReference{Kind:"TidbMonitor", Namespace:"default", Name:"basic", UID:"29b31a69-9b34-4fe6-8ea2-6140059b6058", APIVersion:"pingcap.com/v1alpha1", ResourceVersion:"50293", FieldPath:""}): type: 'Warning' reason: 'FailedSync' Sync TidbMonitor[default/basic] Deployment failed,err:tidbcluster.pingcap.com "basic" not found

[Yisaer]

This is a bug, the tidbmonitor is supposed to use its namespace when the targetRef namespace is not defined.

ref:
#1834