{"record":{"id":"35b124a12e506d1e","repo":"kubernetes/kops","slug":"error-reading-hostname-from-linode-metadata-v","errorCode":null,"errorMessage":"error reading hostname from Linode metadata: %v","messagePattern":"error reading hostname from Linode metadata: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"upup/pkg/fi/nodeup/command.go","lineNumber":547,"sourceCode":"\t\tfullyQualified := string(b)\n\t\tbareHostname := strings.Split(fullyQualified, \".\")[0]\n\t\treturn bareHostname, nil\n\tcase api.CloudProviderDO:\n\t\tvBytes, err := vfs.Context.ReadFile(\"metadata://digitalocean/interfaces/private/0/ipv4/address\")\n\t\tif err != nil {\n\t\t\treturn \"\", fmt.Errorf(\"error reading droplet private IP from DigitalOcean metadata: %v\", err)\n\t\t}\n\n\t\thostname := string(vBytes)\n\t\tif hostname == \"\" {\n\t\t\treturn \"\", errors.New(\"private IP for digitalocean droplet was empty\")\n\t\t}\n\n\t\treturn hostname, nil\n\tcase api.CloudProviderLinode:\n\t\tlabel, err := linodemetadata.GetMetadataValue(context.TODO(), \"label\")\n\t\tif err != nil {\n\t\t\treturn \"\", fmt.Errorf(\"error reading hostname from Linode metadata: %v\", err)\n\t\t}\n\n\t\t// Akamai (Linode) cloud-init does not set the OS hostname.\n\t\t// Set it here so the OS hostname matches the kubelet hostname override.\n\t\tif err := os.WriteFile(\"/etc/hostname\", []byte(label+\"\\n\"), 0o644); err != nil { //nolint:gosec // /etc/hostname is conventionally world-readable system configuration.\n\t\t\tklog.Warningf(\"Failed to write /etc/hostname: %v\", err)\n\t\t} else if err := exec.Command(\"hostname\", label).Run(); err != nil {\n\t\t\tklog.Warningf(\"Failed to set runtime hostname %q: %v\", label, err)\n\t\t} else {\n\t\t\tklog.Infof(\"Set OS hostname to %q\", label)\n\t\t}\n\n\t\treturn label, nil\n\t}\n\n\treturn \"\", nil\n}\n","sourceCodeStart":529,"sourceCodeEnd":565,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/upup/pkg/fi/nodeup/command.go#L529-L565","documentation":"Error \"error reading hostname from Linode metadata: %v\" thrown in kubernetes/kops.","triggerScenarios":"Thrown at upup/pkg/fi/nodeup/command.go:547 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"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"}