Longer trace:
    docker logs -f scheduler
    + '[' kube-scheduler == kubelet ']'
    + exec kube-scheduler --leader-elect=true --v=2 --address=0.0.0.0 --kubeconfig=/etc/kubernetes/ssl/kubecfg-scheduler.yaml --feature-gates=VolumeScheduling=true,PersistentLocalVolumes=true
    I0125 12:11:57.293355       1 feature_gate.go:184] feature gates: map[VolumeScheduling:true PersistentLocalVolumes:true]
    W0125 12:11:57.293498       1 server.go:159] WARNING: all flags than --config are deprecated. Please begin using a config file ASAP.
    I0125 12:11:57.300941       1 server.go:551] Version: v1.9.0-rancher2
    I0125 12:11:57.301104       1 factory.go:837] Creating scheduler from algorithm provider 'DefaultProvider'
    I0125 12:11:57.301118       1 factory.go:898] Creating scheduler with fit predicates 'map[MaxAzureDiskVolumeCount:{} MatchInterPodAffinity:{} GeneralPredicates:{} CheckNodeMemoryPressure:{} CheckNodeDiskPressure:{} NoVolumeZoneConflict:{} MaxEBSVolumeCount:{} CheckNodeCondition:{} PodToleratesNodeTaints:{} CheckVolumeBinding:{} MaxGCEPDVolumeCount:{} NoDiskConflict:{}]' and priority functions 'map[LeastRequestedPriority:{} BalancedResourceAllocation:{} NodePreferAvoidPodsPriority:{} NodeAffinityPriority:{} TaintTolerationPriority:{} SelectorSpreadPriority:{} InterPodAffinityPriority:{}]'
    I0125 12:11:57.301970       1 server.go:570] starting healthz server on 0.0.0.0:10251
    E0125 12:11:57.340263       1 reflector.go:205] k8s.io/kubernetes/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.StorageClass: storageclasses.storage.k8s.io is forbidden: User "system:kube-scheduler" cannot list storageclasses.storage.k8s.io at the cluster scope
    E0125 12:11:58.341341       1 reflector.go:205] k8s.io/kubernetes/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.StorageClass: storageclasses.storage.k8s.io is forbidden: User "system:kube-scheduler" cannot list storageclasses.storage.k8s.io at the cluster scope
    E0125 12:11:59.342301       1 reflector.go:205] k8s.io/kubernetes/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.StorageClass: storageclasses.storage.k8s.io is forbidden: User "system:kube-scheduler" cannot list storageclasses.storage.k8s.io at the cluster scope
    E0125 12:12:00.343388       1 reflector.go:205] k8s.io/kubernetes/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.StorageClass: storageclasses.storage.k8s.io is forbidden: User "system:kube-scheduler" cannot list storageclasses.storage.k8s.io at the cluster scope
    E0125 12:12:01.344580       1 reflector.go:205] k8s.io/kubernetes/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.StorageClass: storageclasses.storage.k8s.io is forbidden: User "system:kube-scheduler" cannot list storageclasses.storage.k8s.io at the cluster scope