{"record":{"id":"f98d8df983c158fb","repo":"kubernetes/kubernetes","slug":"error-while-loading-kubeconfig-from-file-v-v","errorCode":null,"errorMessage":"error while loading kubeconfig from file %v: %v","messagePattern":"error while loading kubeconfig from file (.+?): (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/kubemark/app/hollow_node.go","lineNumber":120,"sourceCode":"\tfs.Var(&bindableNodeLabels, \"node-labels\", \"Additional node labels\")\n\tfs.Var(utilflag.RegisterWithTaintsVar{Value: &c.RegisterWithTaints}, \"register-with-taints\", \"Register the node with the given list of taints (comma separated \\\"<key>=<value>:<effect>\\\"). No-op if register-node is false.\")\n\tfs.IntVar(&c.MaxPods, \"max-pods\", maxPods, \"Number of pods that can run on this Kubelet.\")\n\tbindableExtendedResources := cliflag.ConfigurationMap(c.ExtendedResources)\n\tfs.Var(&bindableExtendedResources, \"extended-resources\", \"Register the node with extended resources (comma separated \\\"<name>=<quantity>\\\")\")\n\tfs.BoolVar(&c.UseHostImageService, \"use-host-image-service\", true, \"Set to true if the hollow-kubelet should use the host image service. If set to false the fake image service will be used\")\n\n\tfs.BoolVar(&c.UseRealProxier, \"use-real-proxier\", true, \"Has no effect.\")\n\t_ = fs.MarkDeprecated(\"use-real-proxier\", \"This flag is deprecated and will be removed in a future release.\")\n\tfs.DurationVar(&c.ProxierSyncPeriod, \"proxier-sync-period\", 30*time.Second, \"Has no effect.\")\n\t_ = fs.MarkDeprecated(\"proxier-sync-period\", \"This flag is deprecated and will be removed in a future release.\")\n\tfs.DurationVar(&c.ProxierMinSyncPeriod, \"proxier-min-sync-period\", 0, \"Has no effect.\")\n\t_ = fs.MarkDeprecated(\"proxier-min-sync-period\", \"This flag is deprecated and will be removed in a future release.\")\n}\n\nfunc (c *hollowNodeConfig) createClientConfigFromFile() (*restclient.Config, error) {\n\tclientConfig, err := clientcmd.LoadFromFile(c.KubeconfigPath)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"error while loading kubeconfig from file %v: %v\", c.KubeconfigPath, err)\n\t}\n\tconfig, err := clientcmd.NewDefaultClientConfig(*clientConfig, &clientcmd.ConfigOverrides{}).ClientConfig()\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"error while creating kubeconfig: %v\", err)\n\t}\n\tconfig.ContentType = c.ContentType\n\tconfig.QPS = c.QPS\n\tconfig.Burst = c.Burst\n\treturn config, nil\n}\n\nfunc (c *hollowNodeConfig) bootstrapClientConfig() error {\n\tif c.BootstrapKubeconfigPath != \"\" {\n\t\treturn bootstrap.LoadClientCert(context.TODO(), c.KubeconfigPath, c.BootstrapKubeconfigPath, c.CertDirectory, types.NodeName(c.NodeName))\n\t}\n\treturn nil\n}\n","sourceCodeStart":102,"sourceCodeEnd":138,"githubUrl":"https://github.com/kubernetes/kubernetes/blob/b882c60b4023bdf09264c2d5d30a2cadebc240fb/cmd/kubemark/app/hollow_node.go#L102-L138","documentation":"Returned by hollowNodeConfig.createClientConfigFromFile (hollow_node.go:120) when clientcmd.LoadFromFile cannot read or parse the kubeconfig at the --kubeconfig path (default /kubeconfig/kubeconfig). kubemark needs a valid kubeconfig to build a client to the API server; any read or parse failure from LoadFromFile is wrapped here. The inner error from client-go tells you whether it was a missing file, bad perms, or malformed YAML.","triggerScenarios":"Running `kubemark --morph kubelet` (or proxy) with --kubeconfig pointing at a path that does not exist, is a directory, is unreadable by the kubemark process, or contains YAML/JSON that clientcmd rejects (wrong schema, duplicate keys, truncated).","commonSituations":"The hollow-node pod's kubeconfig volume isn't mounted at /kubeconfig/kubeconfig; the benchmark manifest mounted the wrong secret; the kubeconfig was half-written by a failed bootstrap step; a typo in --kubeconfig.","solutions":["Confirm the file exists and is readable by the kubemark UID: `ls -l <kubeconfig>`.","Validate it parses as kubeconfig: `kubectl config view --kubeconfig <path>` must print clusters/contexts/users.","Fix the mount/flag so --kubeconfig points at the real file (default expected at /kubeconfig/kubeconfig).","Regenerate the kubeconfig from the API server if it is empty or corrupt."],"exampleFix":"// before\nclientConfig, err := clientcmd.LoadFromFile(c.KubeconfigPath)\nif err != nil {\n    return nil, fmt.Errorf(\"error while loading kubeconfig from file %v: %v\", c.KubeconfigPath, err)\n}\n\n// after - fail with an actionable message when the path is bad up front\nif _, statErr := os.Stat(c.KubeconfigPath); statErr != nil {\n    return nil, fmt.Errorf(\"kubeconfig path %q not accessible: %w; check --kubeconfig mount\", c.KubeconfigPath, statErr)\n}\nclientConfig, err := clientcmd.LoadFromFile(c.KubeconfigPath)\nif err != nil {\n    return nil, fmt.Errorf(\"loading kubeconfig from file %q: %w\", c.KubeconfigPath, err)\n}","handlingStrategy":"validation","validationCode":"// Run before calling createClientConfigFromFile / LoadFromFile.\nfunc validateKubeconfigPath(path string) error {\n    info, err := os.Stat(path)\n    if err != nil {\n        return fmt.Errorf(\"kubeconfig %q not accessible: %w\", path, err)\n    }\n    if info.IsDir() {\n        return fmt.Errorf(\"kubeconfig %q is a directory, expected a file\", path)\n    }\n    return nil\n}","typeGuard":null,"tryCatchPattern":"clientConfig, err := clientcmd.LoadFromFile(c.KubeconfigPath)\nif err != nil {\n    return nil, fmt.Errorf(\"loading kubeconfig from file %q: %w\", c.KubeconfigPath, err)\n}","preventionTips":["Always pass an absolute --kubeconfig path resolved before launch.","In pod specs, mount the kubeconfig secret read-only at the exact expected path.","Add a startup probe that stat-checks the kubeconfig before the binary depends on it."],"tags":["kubemark","kubeconfig","kubernetes","configuration","client-go"],"analyzedSha":"b882c60b4023bdf09264c2d5d30a2cadebc240fb","analyzedAt":"2026-08-07T04:07:48.144Z","schemaVersion":2},"datasetVersion":"2026-08-07T07:17:06.508Z"}