{"record":{"id":"9d491a316029b1e1","repo":"kubernetes/kops","slug":"error-serializing-keyset-v","errorCode":null,"errorMessage":"error serializing keyset: %v","messagePattern":"error serializing keyset: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"upup/pkg/fi/vfs_castore.go","lineNumber":153,"sourceCode":"\tacl, err := acls.GetACL(ctx, p, cluster)\n\tif err != nil {\n\t\treturn err\n\t}\n\treturn p.WriteFile(ctx, bytes.NewReader(objectData), acl)\n}\n\n// serializeKeysetBundle converts a Keyset bundle to yaml, for writing to VFS.\nfunc serializeKeysetBundle(o *kops.Keyset) ([]byte, error) {\n\tvar objectData bytes.Buffer\n\tcodecs := kopscodecs.Codecs\n\tyaml, ok := runtime.SerializerInfoForMediaType(codecs.SupportedMediaTypes(), \"application/yaml\")\n\tif !ok {\n\t\tklog.Fatalf(\"no YAML serializer registered\")\n\t}\n\tencoder := codecs.EncoderForVersion(yaml.Serializer, v1alpha2.SchemeGroupVersion)\n\n\tif err := encoder.Encode(o, &objectData); err != nil {\n\t\treturn nil, fmt.Errorf(\"error serializing keyset: %v\", err)\n\t}\n\treturn objectData.Bytes(), nil\n}\n\n// ListKeysets implements CAStore::ListKeysets\nfunc (c *VFSCAStore) ListKeysets() (map[string]*Keyset, error) {\n\tctx := context.TODO()\n\n\tbaseDir := c.basedir.Join(\"private\")\n\tfiles, err := baseDir.ReadTree(ctx)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"error reading directory %q: %v\", baseDir, err)\n\t}\n\n\tkeysets := map[string]*Keyset{}\n\n\tfor _, f := range files {\n\t\trelativePath, err := vfs.RelativePath(baseDir, f)","sourceCodeStart":135,"sourceCodeEnd":171,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/upup/pkg/fi/vfs_castore.go#L135-L171","documentation":"serializeKeysetBundle encodes a keyset object (certificates/private keys) to YAML using the kops v1alpha2 scheme encoder. If encoder.Encode fails — due to an object that does not conform to the scheme, unsupported fields, or serializer registration problems — this wrapped error is returned to writeKeysetBundle.","triggerScenarios":"writeKeysetBundle serializing a Keyset whose contents fail scheme encoding: keyset data loaded from an incompatible kops API version, nil/invalid internal objects, or a Keyset missing required fields that the v1alpha2 encoder enforces.","commonSituations":"Mirroring a CA store created by an older kops version into a newer binary whose encoder requires v1alpha2 objects; corrupted keyset files in the state store; a bug where a keyset was constructed without proper type metadata.","solutions":["Run `kops export kubecfg` / upgrade the state store with a matching kops version so keysets conform to v1alpha2.","Inspect the wrapped error's message for the offending field/type and fix the keyset data.","Verify the keyset was loaded successfully (no nil Primary entries) before mirroring.","Ensure kops binary and state-store API versions are compatible; re-create the keyset if data is corrupt (e.g. via `kops replace` or re-issuing certs)."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"// Go: no pre-call validation hook; ensure keyset was loaded from the same kops API version\nif keyset == nil || keyset.Primary == nil {\n\treturn fmt.Errorf(\"keyset %s not loaded before serialization\", name)\n}","typeGuard":null,"tryCatchPattern":"data, err := serializeKeysetBundle(...)\nif err != nil {\n\treturn fmt.Errorf(\"mirroring keyset %q failed: %w; check kops/state-store version compatibility\", name, err)\n}","preventionTips":["Keep the kops binary version aligned with the state-store's API version; run `kops upgrade cluster` before mirroring.","Never hand-edit keyset YAML files in the state store.","Test mirror operations on a copied state store before production use."],"tags":["serialization","keystore","yaml","kops-api"],"backgroundTag":"keyset-serialization-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"}