{"record":{"id":"9cddbaf441dfdfb1","repo":"kubernetes/kops","slug":"error-listing-instances-in-instancegroupmanager","errorCode":null,"errorMessage":"error listing instances in InstanceGroupManager: %v","messagePattern":"error listing instances in InstanceGroupManager: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/resources/gce/gce.go","lineNumber":241,"sourceCode":"\t\t\t\tcontinue\n\t\t\t}\n\n\t\t\tresourceTracker := &resources.Resource{\n\t\t\t\tName:    mig.Name,\n\t\t\t\tID:      zoneName + \"/\" + mig.Name,\n\t\t\t\tType:    typeInstanceGroupManager,\n\t\t\t\tDeleter: func(cloud fi.Cloud, r *resources.Resource) error { return gce.DeleteInstanceGroupManager(c, mig) },\n\t\t\t\tObj:     mig,\n\t\t\t}\n\n\t\t\tresourceTracker.Blocks = append(resourceTracker.Blocks, typeInstanceTemplate+\":\"+instanceTemplate.Name)\n\n\t\t\tklog.V(4).Infof(\"Found resource: %s\", mig.SelfLink)\n\t\t\tresourceTrackers = append(resourceTrackers, resourceTracker)\n\n\t\t\tinstanceTrackers, err := d.listManagedInstances(mig)\n\t\t\tif err != nil {\n\t\t\t\treturn nil, fmt.Errorf(\"error listing instances in InstanceGroupManager: %v\", err)\n\t\t\t}\n\t\t\tresourceTrackers = append(resourceTrackers, instanceTrackers...)\n\t\t}\n\t}\n\n\treturn resourceTrackers, nil\n}\n\nfunc (d *clusterDiscoveryGCE) listManagedInstances(igm *compute.InstanceGroupManager) ([]*resources.Resource, error) {\n\tc := d.gceCloud\n\n\tvar resourceTrackers []*resources.Resource\n\n\tzoneName := gce.LastComponent(igm.Zone)\n\n\tinstances, err := gce.ListManagedInstances(c, igm)\n\tif err != nil {\n\t\treturn nil, err","sourceCodeStart":223,"sourceCodeEnd":259,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/pkg/resources/gce/gce.go#L223-L259","documentation":"Fires when listManagedInstances fails to enumerate the VM instances belonging to a discovered InstanceGroupManager during GCE cluster resource discovery — an API or network failure listing managed instances.","triggerScenarios":"Thrown at pkg/resources/gce/gce.go:241 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check compute.instanceGroupManagers.listManagedInstances permission","Retry; the MIG may be mid-resize and transient errors can occur","Inspect the MIG via gcloud to verify its instances are accessible"],"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"}