{"record":{"id":"71f25768887566d0","repo":"kubernetes/kops","slug":"failed-to-get-fixed-ip-for-associated-pool-v","errorCode":null,"errorMessage":"Failed to get fixed ip for associated pool: %v","messagePattern":"Failed to get fixed ip for associated pool: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"upup/pkg/fi/cloudup/openstacktasks/poolassociation.go","lineNumber":148,"sourceCode":"\t\t\treturn fi.RequiredField(\"Name\")\n\t\t}\n\t} else {\n\t\tif changes.ID != nil {\n\t\t\treturn fi.CannotChangeField(\"ID\")\n\t\t}\n\t\tif changes.Name != nil {\n\t\t\treturn fi.CannotChangeField(\"Name\")\n\t\t}\n\t}\n\treturn nil\n}\n\nfunc GetServerFixedIP(client *gophercloud.ServiceClient, server *servers.Server, interfaceName string) (memberAddress string, err error) {\n\tdone, err := vfs.RetryWithBackoff(readBackoff, func() (bool, error) {\n\t\tmemberAddress, err = openstack.GetServerFixedIP(server, interfaceName)\n\t\tif err != nil {\n\t\t\t// sometimes provisioning interfaces is slow, that is why we need retry the interface from the server\n\t\t\treturn false, fmt.Errorf(\"Failed to get fixed ip for associated pool: %v\", err)\n\t\t}\n\t\treturn true, nil\n\t})\n\tif done {\n\t\treturn memberAddress, nil\n\t}\n\treturn memberAddress, err\n}\n\nfunc (_ *PoolAssociation) RenderOpenstack(t *openstack.OpenstackAPITarget, a, e, changes *PoolAssociation) error {\n\tif a == nil {\n\t\tserverList, err := t.Cloud.ListInstances(servers.ListOpts{\n\t\t\tName: fmt.Sprintf(\"^%s\", fi.ValueOf(e.ServerPrefix)),\n\t\t})\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"error listing servers: %v\", err)\n\t\t}\n","sourceCodeStart":130,"sourceCodeEnd":166,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/upup/pkg/fi/cloudup/openstacktasks/poolassociation.go#L130-L166","documentation":"GetServerFixedIP resolves a Nova server's fixed IP on a named interface for use as the Octavia pool member address, wrapped in vfs.RetryWithBackoff. Each failed lookup is wrapped as this error and retried; if the retry budget is exhausted, the error is returned to RenderOpenstack and member association aborts.","triggerScenarios":"openstack.GetServerFixedIP(server, interfaceName) cannot find an interface/port matching interfaceName on the server within the readBackoff window: the port is still provisioning, the interfaceName doesn't match any port's network/device name, or the server has no fixed IP on that subnet yet.","commonSituations":"Nodes just booted and ports not yet ACTIVE when the loadbalancer task runs; InterfaceName in the cluster spec mistyped (e.g. 'eth0' vs actual Neutron port name); instance boot failure leaving the server without ports; slow Neutron provisioning exceeding the retry backoff.","solutions":["Verify the InterfaceName in the cluster spec matches the server's actual port/network name (`openstack port list --server <id>`)","Retry `kops update cluster` after nodes finish booting; the retry backoff may simply need more time","Check the wrapped inner error: 'no fixed ip found' means wrong interface; API errors mean Nova/Neutron problems","Ensure the node subnet has DHCP/IP allocation working and the port reached ACTIVE state","Increase readBackoff timing in a local build if provisioning is persistently slow in your cloud"],"exampleFix":"// before\ninterfaceName: fi.String(\"eth1\") // no such port on server\n// after\ninterfaceName: fi.String(\"eth0\") // matches `openstack port list --server <id>`","handlingStrategy":"retry","validationCode":"// confirm the interface/port exists before association\nout, err := exec.Command(\"openstack\", \"port\", \"list\", \"--server\", serverID, \"--long\").Output()\nif err != nil || !bytes.Contains(out, []byte(interfaceName)) {\n\treturn fmt.Errorf(\"interface %q not yet available on server %s\", interfaceName, serverID)\n}","typeGuard":"func hasFixedIPOnInterface(server *servers.Server, interfaceName string) bool {\n\tfor _, addrMap := range server.Addresses {\n\t\tfor _, a := range addrMap.([]interface{}) {\n\t\t\tif m, ok := a.(map[string]interface{}); ok && m[\"OS-EXT-IPS:type\"] == \"fixed\" {\n\t\t\t\treturn true\n\t\t\t}\n\t\t}\n\t}\n\treturn false\n}","tryCatchPattern":"memberAddress, err := GetServerFixedIP(client, &server, ifaceName)\nif err != nil {\n\t// GetServerFixedIP already retries with readBackoff; add an outer\n\t// bounded retry with longer delay for slow-provisioning clouds\n\treturn retryLonger(backoff_5m)\n}","preventionTips":["Match InterfaceName to `openstack port list --server` output exactly","Wait for nodes to reach ACTIVE before loadbalancer reconciliation","Ensure DHCP/port allocation is healthy in the node subnet"],"tags":["openstack","nova","neutron","loadbalancer","retry"],"backgroundTag":"server-fixed-ip-not-found","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"}