k8s.io/kubernetes@v1.31.0-alpha.0.0.20240520171757-56147500dadc/pkg/probe/util.go (about) 1 /* 2 Copyright 2022 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package probe 18 19 import ( 20 "fmt" 21 "strconv" 22 23 v1 "k8s.io/api/core/v1" 24 "k8s.io/apimachinery/pkg/util/intstr" 25 ) 26 27 func ResolveContainerPort(param intstr.IntOrString, container *v1.Container) (int, error) { 28 port := -1 29 var err error 30 switch param.Type { 31 case intstr.Int: 32 port = param.IntValue() 33 case intstr.String: 34 if port, err = findPortByName(container, param.StrVal); err != nil { 35 // Last ditch effort - maybe it was an int stored as string? 36 if port, err = strconv.Atoi(param.StrVal); err != nil { 37 return port, err 38 } 39 } 40 default: 41 return port, fmt.Errorf("intOrString had no kind: %+v", param) 42 } 43 if port > 0 && port < 65536 { 44 return port, nil 45 } 46 return port, fmt.Errorf("invalid port number: %v", port) 47 } 48 49 // findPortByName is a helper function to look up a port in a container by name. 50 func findPortByName(container *v1.Container, portName string) (int, error) { 51 for _, port := range container.Ports { 52 if port.Name == portName { 53 return int(port.ContainerPort), nil 54 } 55 } 56 return 0, fmt.Errorf("port %s not found", portName) 57 }