{"record":{"id":"b546b71846d42e99","repo":"kubernetes/kops","slug":"cannot-parse-kubernetes-version-q-v","errorCode":null,"errorMessage":"cannot parse kubernetes version %q: %v","messagePattern":"cannot parse kubernetes version %q: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/kops/update_cluster.go","lineNumber":650,"sourceCode":"\n// checkControlPlaneRunningVersion returns the minimum control plane running version\nfunc checkControlPlaneRunningVersion(ctx context.Context, clusterName string, version string) (string, error) {\n\tconfigLoadingRules := clientcmd.NewDefaultClientConfigLoadingRules()\n\tconfig, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(\n\t\tconfigLoadingRules,\n\t\t&clientcmd.ConfigOverrides{CurrentContext: clusterName}).ClientConfig()\n\tif err != nil {\n\t\treturn version, fmt.Errorf(\"cannot load kubecfg settings for %q: %v\", clusterName, err)\n\t}\n\n\tk8sClient, err := kubernetes.NewForConfig(config)\n\tif err != nil {\n\t\treturn version, fmt.Errorf(\"cannot build kubernetes api client for %q: %v\", clusterName, err)\n\t}\n\n\tparsedVersion, err := apisutil.ParseKubernetesVersion(version)\n\tif err != nil {\n\t\treturn version, fmt.Errorf(\"cannot parse kubernetes version %q: %v\", clusterName, err)\n\t}\n\tnodeList, err := k8sClient.CoreV1().Nodes().List(ctx, metav1.ListOptions{\n\t\tLabelSelector: \"node-role.kubernetes.io/control-plane\",\n\t})\n\tif err != nil {\n\t\treturn version, fmt.Errorf(\"cannot list nodes in cluster %q: %v\", clusterName, err)\n\t}\n\tfor _, node := range nodeList.Items {\n\t\tif apisutil.IsKubernetesGTE(node.Status.NodeInfo.KubeletVersion, *parsedVersion) {\n\t\t\tversion = node.Status.NodeInfo.KubeletVersion\n\t\t\tparsedVersion, _ = apisutil.ParseKubernetesVersion(version)\n\t\t}\n\n\t}\n\treturn strings.TrimPrefix(version, \"v\"), nil\n}\n","sourceCodeStart":632,"sourceCodeEnd":667,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/cmd/kops/update_cluster.go#L632-L667","documentation":"Wraps a failure of apisutil.ParseKubernetesVersion in checkControlPlaneRunningVersion: the configured Kubernetes version string (e.g. from the cluster spec/channel) is not a parseable semver version, so node versions cannot be compared against it.","triggerScenarios":"Thrown at cmd/kops/update_cluster.go:650 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check kops.spec.kubernetesVersion in the cluster spec","Use a full semver string like v1.28.5","Update the channel or pin a valid version"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"4c8573c808a73d578c5eadc86d410646ea0b0d73","analyzedAt":"2026-09-05T04:13:19.212Z","contentChangedAt":"2026-09-05T04:13:19.212Z","schemaVersion":2},"datasetVersion":"2026-09-12T07:17:12.445Z"}