{"record":{"id":"e2c3ccab4ea1549f","repo":"kubernetes/kops","slug":"building-path-for-q-w","errorCode":null,"errorMessage":"building path for %q: %w","messagePattern":"building path for %q: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/model/resources/nodeup.go","lineNumber":428,"sourceCode":"}\n\n// Azure Blob downloads require a managed identity on the instance.\nfunc (b *NodeUpScript) useBlobDownload() bool {\n\treturn b.CloudProvider == string(kops.CloudProviderAzure) && b.firstLocationWithScheme(\"azureblob://\") != \"\"\n}\n\n// ResolveS3Region resolves the bucket region because SigV4 requires it but s3:// URLs omit it.\nfunc (b *NodeUpScript) ResolveS3Region(ctx context.Context, vfsContext *vfs.VFSContext) error {\n\tif b.CloudProvider != string(kops.CloudProviderAWS) {\n\t\treturn nil\n\t}\n\tlocation := b.firstLocationWithScheme(\"s3://\")\n\tif location == \"\" {\n\t\treturn nil\n\t}\n\tp, err := vfsContext.BuildVfsPath(location)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"building path for %q: %w\", location, err)\n\t}\n\ts3Path, ok := p.(*vfs.S3Path)\n\tif !ok {\n\t\treturn fmt.Errorf(\"unexpected path type %T for %q\", p, location)\n\t}\n\tb.S3Region, err = s3Path.Region(ctx)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"getting the region of %q: %w\", location, err)\n\t}\n\tsupported, err := awsup.SupportsS3BootstrapEndpoint(ctx, b.S3Region)\n\tif err != nil {\n\t\treturn err\n\t}\n\tif !supported {\n\t\treturn fmt.Errorf(\"downloading nodeup from an s3:// URL is not supported in AWS region %q\", b.S3Region)\n\t}\n\treturn nil\n}","sourceCodeStart":410,"sourceCodeEnd":446,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/pkg/model/resources/nodeup.go#L410-L446","documentation":"ResolveS3Region resolves the region of the first s3:// nodeup source by building its VFS path via vfsContext.BuildVfsPath. This error wraps any failure from that step — typically a malformed S3 URL that the VFS layer cannot turn into an S3Path (invalid bucket/key shape or parse failure).","triggerScenarios":"Calling ResolveS3Region on a NodeUpScript whose NodeUpSource contains an s3:// location that vfsContext.BuildVfsPath rejects — e.g. a location that escaped validation but is not a resolvable S3 VFS path, or empty/edge-case bucket names that vfs refuses.","commonSituations":"Programmatic source construction producing s3:// URLs vfs cannot parse; VFS context misconfiguration (custom registry/context setup); bucket names with invalid characters that slipped through earlier checks.","solutions":["Read the wrapped BuildVfsPath error for the specific VFS parse problem.","Fix the s3:// location so it matches s3://<bucket>/<key> with a valid bucket name (3-63 chars, lowercase, digits, hyphens).","Ensure the vfsContext used is the default/correctly configured one.","If the location is user-supplied, pre-validate the bucket name before building the NodeUpScript."],"exampleFix":"// before\nNodeUpSource: \"s3://Bucket_With_Underscores/nodeup\" // invalid bucket name\n// after\nNodeUpSource: \"s3://bucket-with-hyphens/nodeup\"","handlingStrategy":"try-catch","validationCode":"p, err := vfsContext.BuildVfsPath(loc)\nif err != nil {\n    return fmt.Errorf(\"s3 location not vfs-resolvable: %w\", err)\n}","typeGuard":"func resolvableVFS(ctx *vfs.VFSContext, loc string) bool { _, err := ctx.BuildVfsPath(loc); return err == nil }","tryCatchPattern":"if err := script.ResolveS3Region(ctx); err != nil {\n    return fmt.Errorf(\"check s3:// bucket/key validity: %w\", err)\n}","preventionTips":["Validate bucket names (3-63 chars, lowercase, digits, hyphens) before use","Use the default vfs.Context unless you fully replicate S3 handling","Add config validation at cluster-spec load time"],"tags":["s3","vfs","region","nodeup"],"backgroundTag":"vfs-path-build-failed","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"}