Multus network fails to initialize in OpenShift 4

Issue

• How to resolve the following error in events?

LAST SEEN   TYPE      REASON                   OBJECT                                      MESSAGE
2m23s       Warning   FailedCreatePodSandBox   pod/pod1                    (combined from similar events): Failed create pod sandbox: rpc error: code = Unknown desc = failed to create pod network sandbox k8s_pod1-bhd8q_ns_27cb6033-1b4e-11ea-9a47-566fc9ee004c_0(8008560cf7ca25a5b12835a7118da01a4a96d65b2dd90985bb146366d0a32b2f): Multus: Err in loading K8s Delegates k8s args: Multus: Err in getting k8s network from pod: GetPodNetwork: failed getting the delegate: cniConfigFromNetworkResource: err in getCNIConfigFromFile: No networks found in /etc/cni/multus/net.d

• Why does SDN pod shutdown automatically?

I0921 07:07:16.438034   12152 proxier.go:367] userspace proxy: processing 0 service events
I0921 07:07:16.438055   12152 proxier.go:346] userspace syncProxyRules took 59.113113ms
I0921 07:07:16.438066   12152 proxy.go:337] hybrid proxy: unidlingProxy.syncProxyRules complete
interrupt: Gracefully shutting down ...

• Why is the liveness probe failing for SDN pod?

Sep 21 07:07:13 ip-10-0-152-60 hyperkube[1365]: I0921 07:07:13.494388    1365 prober.go:112] Liveness probe for "sdn-6qckt_openshift-sdn(8be9db67-dc35-11e9-a4c5-12d5b2c68656):sdn" failed (failure): Get http://10.0.152.60:10256/healthz: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)