try setting KUBERNETES_MASTER environment variable
Aug 10 07:04:24 node-1 kube-scheduler[13304]: I0810 07:04:24.529958 13304 flags.go:59] FLAG: --leader-elect-resource-lock="leases"
Aug 10 07:04:24 node-1 kube-scheduler[13304]: I0810 07:04:24.529962 13304 flags.go:59] FLAG: --leader-elect-resource-name="kube-scheduler"
Aug 10 07:04:24 node-1 kube-scheduler[13304]: I0810 07:04:24.529969 13304 flags.go:59] FLAG: --leader-elect-resource-namespace="kube-system"
Aug 10 07:04:24 node-1 kube-scheduler[13304]: I0810 07:04:24.529974 13304 flags.go:59] FLAG: --leader-elect-retry-period="2s"
Aug 10 07:04:24 node-1 kube-scheduler[13304]: I0810 07:04:24.529977 13304 flags.go:59] FLAG: --lock-object-name="kube-scheduler"
Aug 10 07:04:24 node-1 kube-scheduler[13304]: I0810 07:04:24.529982 13304 flags.go:59] FLAG: --lock-object-namespace="kube-system"
Aug 10 07:04:27 node-1 kube-scheduler[13304]: failed to get delegated authentication kubeconfig: failed to get delegated authentication kubeconfig: invalid configuration: no configuration has been provided, try setting KUBERNETES_MASTER environment variable