{"record":{"id":"0b253af41703e133","repo":"kubernetes/kops","slug":"error-populating-configuration-v-0b253a","errorCode":null,"errorMessage":"error populating configuration: %v","messagePattern":"error populating configuration: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/kops/create_cluster.go","lineNumber":729,"sourceCode":"\t// a port conflict that breaks the BPF dataplane.\n\t// https://docs.tigera.io/calico-enterprise/latest/operations/ebpf/install#disable-kube-proxy-or-avoid-conflicts\n\tif calico := cluster.Spec.Networking.Calico; calico != nil && calico.BPFEnabled {\n\t\tif cluster.Spec.KubeProxy == nil {\n\t\t\tcluster.Spec.KubeProxy = &api.KubeProxyConfig{}\n\t\t}\n\t\tif cluster.Spec.KubeProxy.Enabled == nil {\n\t\t\tcluster.Spec.KubeProxy.Enabled = new(false)\n\t\t}\n\t}\n\n\tcloud, err := cloudup.BuildCloud(cluster)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\terr = cloudup.PerformAssignments(cluster, clientset.VFSContext(), cloud)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"error populating configuration: %v\", err)\n\t}\n\n\tstrict := false\n\terr = validation.DeepValidate(cluster, instanceGroups, strict, clientset.VFSContext(), nil)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tassetBuilder := assets.NewAssetBuilder(clientset.VFSContext(), cluster.Spec.Assets, false)\n\tfullCluster, err := cloudup.PopulateClusterSpec(ctx, clientset, cluster, instanceGroups, cloud, assetBuilder)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tkubernetesVersion, err := kopsutil.ParseKubernetesVersion(clusterResult.Cluster.Spec.KubernetesVersion)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"cannot parse KubernetesVersion %q in cluster: %w\", clusterResult.Cluster.Spec.KubernetesVersion, err)\n\t}","sourceCodeStart":711,"sourceCodeEnd":747,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/cmd/kops/create_cluster.go#L711-L747","documentation":"After building the cluster spec, PerformAssignments fills in derived configuration (e.g. subnets, network settings, DNS) against the cloud; any failure is wrapped as 'error populating configuration'. It means the cluster spec could not be completed with cloud-derived values.","triggerScenarios":"PerformAssignments failing due to cloud API errors (e.g. resolving a shared VPC/subnet, verifying the network exists) or an invalid cluster spec referencing resources that don't exist.","commonSituations":"Referencing a nonexistent shared VPC/subnet ID; cloud credentials lacking permission to describe networks; mistyped networkCIDR/subnet configuration; region mismatch with the specified zones.","solutions":["Read the wrapped %v error for the specific assignment that failed","Verify referenced VPC/subnet IDs and CIDRs exist in the target region","Check cloud credentials/permissions (e.g. AWS ec2:DescribeSubnets)","Run `kops create cluster --dry-run` to validate config without cloud writes"],"exampleFix":"// before\n--vpc=vpc-doesnotexist\n// after\n--vpc=vpc-0123456789abcdef0  # existing VPC in the target region","handlingStrategy":"try-catch","validationCode":"// confirm referenced network resources exist before create\n// e.g. for AWS shared VPC:\naws ec2 describe-vpcs --vpc-ids $VPC_ID\naws ec2 describe-subnets --filters Name=vpc-id,Values=$VPC_ID","typeGuard":null,"tryCatchPattern":"err := cloudup.PerformAssignments(cluster, vfsContext, cloud)\nif err != nil {\n\treturn fmt.Errorf(\"error populating configuration: %w\", err)\n}","preventionTips":["Verify VPC/subnet IDs and regions before referencing them","Use --dry-run to catch config problems early","Ensure cloud credentials can describe network resources","Keep zones and region consistent in the cluster spec"],"tags":["cloud","validation","cluster-config"],"backgroundTag":"cloud-resource-not-found","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"}