{"record":{"id":"eeccfbe8355d55e3","repo":"kubernetes/kops","slug":"error-generating-akamai-linode-instance-label-fo","errorCode":null,"errorMessage":"error generating Akamai (Linode) instance label for group %q: %w","messagePattern":"error generating Akamai \\(Linode\\) instance label for group %q: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"upup/pkg/fi/cloudup/linodetasks/instance.go","lineNumber":228,"sourceCode":"\tif err != nil {\n\t\treturn err\n\t}\n\n\tuserDataBytes, err := fi.ResourceAsBytes(expected.UserData)\n\tif err != nil {\n\t\treturn err\n\t}\n\tuserDataHash := generateUserDataHash(string(userDataBytes))\n\tinstanceTags := append([]string{}, expected.Tags...)\n\tinstanceTags = append(instanceTags, fmt.Sprintf(\"%s:%s\", linode.TagKubernetesInstanceUserData, userDataHash))\n\tencodedUserData := base64.StdEncoding.EncodeToString(userDataBytes)\n\n\tinterfaces := buildLinodeInterfaces(fi.ValueOf(expected.Subnet.ID), fi.ValueOf(expected.RequirePublicInterface))\n\ttoCreate := expected.Count - actualCount\n\tfor range toCreate {\n\t\tlabel, err := buildLinodeInstanceLabel(fi.ValueOf(expected.Name))\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"error generating Akamai (Linode) instance label for group %q: %w\", fi.ValueOf(expected.Name), err)\n\t\t}\n\t\t_, err = t.Cloud.Client().CreateInstance(context.Background(), linodego.InstanceCreateOptions{\n\t\t\tRegion:              expected.Region,\n\t\t\tType:                expected.Type,\n\t\t\tLabel:               label,\n\t\t\tImage:               expected.Image,\n\t\t\tAuthorizedKeys:      authorizedKeys,\n\t\t\tTags:                instanceTags,\n\t\t\tMetadata:            &linodego.InstanceMetadataOptions{UserData: encodedUserData},\n\t\t\tInterfaceGeneration: linodego.GenerationLinode,\n\t\t\tLinodeInterfaces:    interfaces,\n\t\t})\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"error creating Akamai (Linode) instance for group %q: %w\", fi.ValueOf(expected.Name), err)\n\t\t}\n\t}\n\n\treturn nil","sourceCodeStart":210,"sourceCodeEnd":246,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/upup/pkg/fi/cloudup/linodetasks/instance.go#L210-L246","documentation":"For each instance to create, RenderLinode calls buildLinodeInstanceLabel to generate a unique <=64-char label. This error wraps a failure of that label generation (cryptorand.Read failing) and identifies which instance group it occurred for.","triggerScenarios":"buildLinodeInstanceLabel returns an error — practically only when crypto/rand cannot read random bytes (depleted/failed system entropy) — during the create loop in RenderLinode.","commonSituations":"Running kops inside a hardened container with restricted random device access; broken kernel entropy on a VM.","solutions":["Fix the host's random source (ensure /dev/urandom is accessible)","Re-run kops update once entropy works","If persistent, run on a host/kernel without entropy restrictions"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"label, err := buildLinodeInstanceLabel(name)\nif err != nil {\n    return fmt.Errorf(\"error generating Akamai (Linode) instance label for group %q: %w\", name, err)\n} // investigate host entropy (/dev/urandom) when this fires","preventionTips":["Run kops on hosts with a working /dev/urandom","Avoid hardened containers that block random device access","Surface wrapped errors (%w) with errors.Unwrap for diagnosis"],"tags":["linode","random","entropy"],"backgroundTag":"crypto-rand-failure","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"}