{"record":{"id":"794b21c1a08eb2f1","repo":"kubernetes/kops","slug":"error-reading-last-kops-version-used-to-update-v","errorCode":null,"errorMessage":"error reading last kops version used to update: %v","messagePattern":"error reading last kops version used to update: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"upup/pkg/fi/cloudup/apply_cluster.go","lineNumber":297,"sourceCode":"\t\tif err == nil {\n\t\t\tkopsVersionUpdated := strings.TrimSpace(string(kopsVersionUpdatedBytes))\n\t\t\tversion, err := semver.Parse(kopsVersionUpdated)\n\t\t\tif err != nil {\n\t\t\t\treturn nil, fmt.Errorf(\"error parsing last kops version updated: %v\", err)\n\t\t\t}\n\t\t\tif version.GT(semver.MustParse(kopsbase.Version)) {\n\t\t\t\tfmt.Printf(\"\\n\")\n\t\t\t\tfmt.Printf(\"%s\\n\", starline)\n\t\t\t\tfmt.Printf(\"\\n\")\n\t\t\t\tfmt.Printf(\"The cluster was last updated by kops version %s\\n\", kopsVersionUpdated)\n\t\t\t\tfmt.Printf(\"To permit updating by the older version %s, run with the --allow-kops-downgrade flag\\n\", kopsbase.Version)\n\t\t\t\tfmt.Printf(\"\\n\")\n\t\t\t\tfmt.Printf(\"%s\\n\", starline)\n\t\t\t\tfmt.Printf(\"\\n\")\n\t\t\t\treturn nil, fmt.Errorf(\"kops version older than last used to update the cluster\")\n\t\t\t}\n\t\t} else if err != os.ErrNotExist {\n\t\t\treturn nil, fmt.Errorf(\"error reading last kops version used to update: %v\", err)\n\t\t}\n\t}\n\n\tcloud := c.Cloud\n\n\terr = validation.DeepValidate(c.Cluster, c.InstanceGroups, true, c.Clientset.VFSContext(), cloud)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\tif cluster.Spec.KubernetesVersion == \"\" {\n\t\treturn nil, fmt.Errorf(\"KubernetesVersion not set\")\n\t}\n\tif cluster.Spec.DNSZone == \"\" && cluster.PublishesDNSRecords() {\n\t\treturn nil, fmt.Errorf(\"DNSZone not set\")\n\t}\n\n\tl := &Loader{}","sourceCodeStart":279,"sourceCodeEnd":315,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/upup/pkg/fi/cloudup/apply_cluster.go#L279-L315","documentation":"After parsing the semver marker, Run() also guards read errors: if reading <configBase>/kops-version-updated fails with an error other than ErrNotExist, Run returns this wrapped error. This distinguishes a real storage/permission failure from a simply-missing marker file.","triggerScenarios":"The VFS ReadFile of registry.PathKopsVersionUpdated fails due to missing S3/GCS/Azure permissions, network failure, object-store API errors, or a broken VFS path — anything other than the object not existing.","commonSituations":"Revoked or expired cloud credentials on the CI runner; bucket policy changes removing GetObject permission; transient AWS/GCS 5xx or throttling during update; VPN/proxy blocking access to the state store endpoint.","solutions":["Fix credentials/permissions so the operator can read objects in the state store bucket (re-authenticate with cloud CLI, reapply IAM/GCS policy granting read on the prefix).","Verify connectivity to the object store from the machine running kops (retry after transient errors).","Confirm the state store path is correct with `kops get clusters --state <base>`; then retry the update."],"exampleFix":"// before (expired credentials)\naws s3 ls s3://state-bucket  # AccessDenied\n// after\naws sso login && aws s3 ls s3://state-bucket","handlingStrategy":"try-catch","validationCode":"if _, err := configBase.Join(registry.PathKopsVersionUpdated).ReadFile(ctx); err != nil && err != os.ErrNotExist {\n    return fmt.Errorf(\"cannot read state store marker: %w\", err)\n}","typeGuard":null,"tryCatchPattern":"out, err := runKopsUpdate()\nif err != nil && strings.Contains(err.Error(), \"error reading last kops version used to update\") {\n    // refresh cloud credentials / check state store perms, then retry once\n    refreshCredentials()\n    out, err = runKopsUpdate()\n}","preventionTips":["Grant least-privilege read access to the whole state store prefix for CI roles.","Monitor object-store availability before running cluster updates.","Refresh cloud credentials in long-lived CI sessions."],"tags":["state-store","permissions","io","cloud-credentials"],"backgroundTag":"state-store-read-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"}