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ab655a29b8
If configuration file doesn't exist client variable is not assigned and causes kubeadm crash: $ sudo ./_output/bin/kubeadm reset [reset] Reading configuration from the cluster... [reset] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -oyaml' panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0xf8 pc=0x108c9e7] goroutine 1 [running]: cmd/kubeadm/app/util/config.getInitConfigurationFromCluster(0x171109b, 0xf, 0x0, 0x0, 0xc0005b5a00, 0x3, 0x3, 0x69) cmd/kubeadm/app/util/config/cluster.go:93 +0x37 cmd/kubeadm/app/util/config.loadConfiguration(0x0, 0x0, 0x18d63a0, 0xc00000c018, 0x170620b, 0x5, 0x0, 0x0, 0x15d6000, 0x18d7601, ...) cmd/kubeadm/app/util/config/cluster.go:67 +0x374 k8s.io/kubernetes/cmd/kubeadm/app/util/config.FetchConfigFromFileOrCluster(0x0, 0x0, 0x18d63a0, 0xc00000c018, 0x170620b, 0x5, 0x0, 0x0, 0x497700, 0x18d63e0, ...) cmd/kubeadm/app/util/config/cluster.go:45 +0x9c k8s.io/kubernetes/cmd/kubeadm/app/cmd.resetDetectCRISocket(0x0, 0x0, 0x1, 0x0, 0x18d63e0, 0xc0003f0630) cmd/kubeadm/app/cmd/reset.go:304 +0x73 k8s.io/kubernetes/cmd/kubeadm/app/cmd.NewCmdReset.func1(0xc0002a6780, 0x26dd548, 0x0, 0x0) cmd/kubeadm/app/cmd/reset.go:71 +0x267 k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).execute(0xc0002a6780, 0x26dd548, 0x0, 0x0, 0xc0002a6780, 0x26dd548) vendor/github.com/spf13/cobra/command.go:760 +0x2cc k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0xc00019a000, 0xc000389180, 0xc00019a500, 0xc00057c1a0) vendor/github.com/spf13/cobra/command.go:846 +0x2fd k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).Execute(0xc00019a000, 0xc00000c010, 0x18d63a0) vendor/github.com/spf13/cobra/command.go:794 +0x2b k8s.io/kubernetes/cmd/kubeadm/app.Run(0xc000086180, 0x18b) cmd/kubeadm/app/kubeadm.go:48 +0x202 main.main() cmd/kubeadm/kubeadm.go:29 +0x33 Removing check for configuration file existence should fix the issue.