{"record":{"id":"d0bcaba4975dc626","repo":"kubernetes/kops","slug":"error-creating-subnet-v-d0bcab","errorCode":null,"errorMessage":"Error creating subnet: %v","messagePattern":"Error creating subnet: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"upup/pkg/fi/cloudup/openstacktasks/subnet.go","lineNumber":165,"sourceCode":"\n\t\topt := subnets.CreateOpts{\n\t\t\tName:       fi.ValueOf(e.Name),\n\t\t\tNetworkID:  fi.ValueOf(e.Network.ID),\n\t\t\tIPVersion:  gophercloud.IPv4,\n\t\t\tCIDR:       fi.ValueOf(e.CIDR),\n\t\t\tEnableDHCP: new(true),\n\t\t}\n\n\t\tif len(e.DNSServers) > 0 {\n\t\t\tdnsNameSrv := make([]string, len(e.DNSServers))\n\t\t\tfor i, ns := range e.DNSServers {\n\t\t\t\tdnsNameSrv[i] = fi.ValueOf(ns)\n\t\t\t}\n\t\t\topt.DNSNameservers = dnsNameSrv\n\t\t}\n\t\tv, err := t.Cloud.CreateSubnet(opt)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"Error creating subnet: %v\", err)\n\t\t}\n\n\t\terr = t.Cloud.AppendTag(openstack.ResourceTypeSubnet, v.ID, fi.ValueOf(e.Tag))\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"Error appending tag to subnet: %v\", err)\n\t\t}\n\n\t\te.ID = new(v.ID)\n\t\tklog.V(2).Infof(\"Creating a new Openstack subnet, id=%s\", v.ID)\n\t\treturn nil\n\t} else {\n\t\tif changes.Tag != nil {\n\t\t\terr := t.Cloud.AppendTag(openstack.ResourceTypeSubnet, fi.ValueOf(a.ID), fi.ValueOf(changes.Tag))\n\t\t\tif err != nil {\n\t\t\t\treturn fmt.Errorf(\"error appending tag to subnet: %v\", err)\n\t\t\t}\n\t\t}\n\t\tclient := t.Cloud.NetworkingClient()","sourceCodeStart":147,"sourceCodeEnd":183,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/upup/pkg/fi/cloudup/openstacktasks/subnet.go#L147-L183","documentation":"The Neutron subnet create call failed during apply. The wrapped error identifies the rejection, commonly a CIDR conflict with an existing subnet, invalid CIDR, or network mismatch.","triggerScenarios":"Thrown at upup/pkg/fi/cloudup/openstacktasks/subnet.go:165 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Inspect the wrapped error for the rejected option","Ensure the CIDR does not overlap existing subnets","Verify the network ID and DNS servers, then retry"],"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":"2026-09-12T12:17:11.808Z"}