{"record":{"id":"4432476ff5c322e6","repo":"kubernetes/kops","slug":"fetching-instance-metadata-w","errorCode":null,"errorMessage":"fetching instance metadata: %w","messagePattern":"fetching instance metadata: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"upup/pkg/fi/cloudup/linode/linodemetadata/authenticator.go","lineNumber":110,"sourceCode":"\ttokenBytes, err := io.ReadAll(tokenResp.Body)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"reading metadata token response: %w\", err)\n\t}\n\n\ttoken := strings.TrimSpace(string(tokenBytes))\n\tif token == \"\" {\n\t\treturn \"\", fmt.Errorf(\"metadata token was empty\")\n\t}\n\n\tinstanceReq, err := http.NewRequestWithContext(ctx, http.MethodGet, metadataBaseURL+\"/v1/instance\", nil)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"building instance metadata request: %w\", err)\n\t}\n\tinstanceReq.Header.Set(\"Metadata-Token\", token)\n\n\tinstanceResp, err := client.Do(instanceReq)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"fetching instance metadata: %w\", err)\n\t}\n\tdefer instanceResp.Body.Close()\n\n\tif instanceResp.StatusCode != http.StatusOK {\n\t\treturn \"\", fmt.Errorf(\"fetching instance metadata: unexpected status code %d\", instanceResp.StatusCode)\n\t}\n\n\tinstanceBytes, err := io.ReadAll(instanceResp.Body)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"reading instance metadata response: %w\", err)\n\t}\n\n\tvalue := parseLinodeMetadataValue(string(instanceBytes), key)\n\tif value == \"\" {\n\t\treturn \"\", fmt.Errorf(\"instance %s from Akamai (Linode) metadata was empty\", key)\n\t}\n\treturn value, nil\n}","sourceCodeStart":92,"sourceCodeEnd":128,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/upup/pkg/fi/cloudup/linode/linodemetadata/authenticator.go#L92-L128","documentation":"getLinodeMetadataValue wraps the client.Do error from the token-authenticated GET /v1/instance request. It fires when the instance metadata endpoint is unreachable, the context expires, or the connection fails after a valid token was obtained.","triggerScenarios":"Thrown at upup/pkg/fi/cloudup/linode/linodemetadata/authenticator.go:110 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check network connectivity to the Linode metadata service","Ensure the context deadline allows both token and instance calls","Retry on transient network failures with backoff"],"exampleFix":null,"handlingStrategy":"retry","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"}