{"record":{"id":"5ba8a9f8c00a82ed","repo":"kubernetes/kubernetes","slug":"failed-to-construct-kubelet-dependencies-w","errorCode":null,"errorMessage":"failed to construct kubelet dependencies: %w","messagePattern":"failed to construct kubelet dependencies: %w","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/kubelet/app/server.go","lineNumber":282,"sourceCode":"\t\t\t// We always validate the local configuration (command line + config file).\n\t\t\tif err := kubeletconfigvalidation.ValidateKubeletConfiguration(kubeletConfig, utilfeature.DefaultFeatureGate); err != nil {\n\t\t\t\treturn fmt.Errorf(\"failed to validate kubelet configuration, error: %w, path: %s\", err, kubeletConfig)\n\t\t\t}\n\n\t\t\tif (kubeletConfig.KubeletCgroups != \"\" && kubeletConfig.KubeReservedCgroup != \"\") && (strings.Index(kubeletConfig.KubeletCgroups, kubeletConfig.KubeReservedCgroup) != 0) {\n\t\t\t\tlogger.Info(\"unsupported configuration:KubeletCgroups is not within KubeReservedCgroup\")\n\t\t\t}\n\n\t\t\t// construct a KubeletServer from kubeletFlags and kubeletConfig\n\t\t\tkubeletServer := &options.KubeletServer{\n\t\t\t\tKubeletFlags:         *kubeletFlags,\n\t\t\t\tKubeletConfiguration: *kubeletConfig,\n\t\t\t}\n\n\t\t\t// use kubeletServer to construct the default KubeletDeps\n\t\t\tkubeletDeps, err := UnsecuredDependencies(ctx, kubeletServer, utilfeature.DefaultFeatureGate)\n\t\t\tif err != nil {\n\t\t\t\treturn fmt.Errorf(\"failed to construct kubelet dependencies: %w\", err)\n\t\t\t}\n\n\t\t\tif utilfeature.DefaultFeatureGate.Enabled(zpagesfeatures.ComponentFlagz) {\n\t\t\t\tif cleanFlagSet != nil {\n\t\t\t\t\tnamedFlagSet := map[string]*pflag.FlagSet{server.ComponentKubelet: cleanFlagSet}\n\t\t\t\t\tkubeletDeps.Flagz = flagz.NamedFlagSetsReader{FlagSets: cliflag.NamedFlagSets{FlagSets: namedFlagSet}}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif err := checkPermissions(ctx); err != nil {\n\t\t\t\tlogger.Error(err, \"Kubelet running with insufficient permissions\")\n\t\t\t}\n\n\t\t\t// Log skipped drop-in files if any were encountered during configuration merge\n\t\t\tif len(skippedDropinFiles) > 0 {\n\t\t\t\tfor _, skippedFile := range skippedDropinFiles {\n\t\t\t\t\tlogger.V(4).Info(\"Skipped file in drop-in directory (does not have .conf extension)\", \"file\", skippedFile)\n\t\t\t\t}","sourceCodeStart":264,"sourceCodeEnd":300,"githubUrl":"https://github.com/kubernetes/kubernetes/blob/b882c60b4023bdf09264c2d5d30a2cadebc240fb/cmd/kubelet/app/server.go#L264-L300","documentation":"Returned from the kubelet RunE (cmd/kubelet/app/server.go:282) when UnsecuredDependencies fails while constructing the default kubelet Dependencies. UnsecuredDependencies calls InitializeTLS (cert/key generation/loading, TLS cipher/version parsing), ProbeVolumePlugins, and newTracerProvider; a failure in any of these aborts dependency construction.","triggerScenarios":"TLS setup failure: cannot read/write --tls-cert-file/--tls-private-key-file or --cert-dir, or invalid --tls-min-version / --tls-cipher-suites / curve preferences; volume plugin probe error; tracer/OTLP provider construction error from invalid tracing config.","commonSituations":"Cert directory not writable or out of disk for self-signed cert generation; invalid TLS cipher/version strings; malformed tracing configuration; a volume plugin registration error from a bad --volume-plugin-dir.","solutions":["Ensure --cert-dir exists and is writable by the kubelet user, or provide valid --tls-cert-file/--tls-private-key-file.","Correct --tls-min-version and --tls-cipher-suites to supported values.","Validate tracing configuration (OTLP endpoint, sampling) if set.","Read the wrapped error to identify whether TLS, volume plugins, or tracing caused the failure."],"exampleFix":"// before\n--tls-min-version=TLSv1.0\n// after\n--tls-min-version=VersionTLS12","handlingStrategy":"try-catch","validationCode":"// Pre-check TLS inputs before UnsecuredDependencies.\nif kc.TLSMinVersion != \"\" {\n    if _, err := cliflag.TLSVersion(kc.TLSMinVersion); err != nil { return err }\n}\nif len(kc.TLSCipherSuites) > 0 {\n    if _, err := cliflag.TLSCipherSuites(kc.TLSCipherSuites); err != nil { return err }\n}\n// Ensure cert-dir is writable.\nif fi, err := os.Stat(kf.CertDirectory); err != nil || !fi.IsDir() {\n    return fmt.Errorf(\"cert-dir %q unusable\", kf.CertDirectory)\n}","typeGuard":null,"tryCatchPattern":"deps, err := UnsecuredDependencies(ctx, kubeletServer, featureGate)\nif err != nil {\n    return fmt.Errorf(\"failed to construct kubelet dependencies: %w\", err)\n}","preventionTips":["Ensure --cert-dir is writable and has disk space.","Validate TLS version/cipher values against supported sets.","Validate tracing/OTLP config if enabled."],"tags":["dependencies","kubelet","tls","startup"],"analyzedSha":"b882c60b4023bdf09264c2d5d30a2cadebc240fb","analyzedAt":"2026-08-07T04:07:48.144Z","schemaVersion":2},"datasetVersion":"2026-08-07T07:17:06.508Z"}