portsforobject.go

Documentation: k8s.io/kubectl/pkg/polymorphichelpers

     1  /*
     2  Copyright 2018 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 polymorphichelpers
    18  
    19  import (
    20  	"fmt"
    21  	"strconv"
    22  
    23  	appsv1 "k8s.io/api/apps/v1"
    24  	appsv1beta1 "k8s.io/api/apps/v1beta1"
    25  	appsv1beta2 "k8s.io/api/apps/v1beta2"
    26  	corev1 "k8s.io/api/core/v1"
    27  	extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
    28  	"k8s.io/apimachinery/pkg/runtime"
    29  )
    30  
    31  func portsForObject(object runtime.Object) ([]string, error) {
    32  	switch t := object.(type) {
    33  	case *corev1.ReplicationController:
    34  		return getPorts(t.Spec.Template.Spec), nil
    35  
    36  	case *corev1.Pod:
    37  		return getPorts(t.Spec), nil
    38  
    39  	case *corev1.Service:
    40  		return getServicePorts(t.Spec), nil
    41  
    42  	case *extensionsv1beta1.Deployment:
    43  		return getPorts(t.Spec.Template.Spec), nil
    44  	case *appsv1.Deployment:
    45  		return getPorts(t.Spec.Template.Spec), nil
    46  	case *appsv1beta2.Deployment:
    47  		return getPorts(t.Spec.Template.Spec), nil
    48  	case *appsv1beta1.Deployment:
    49  		return getPorts(t.Spec.Template.Spec), nil
    50  
    51  	case *extensionsv1beta1.ReplicaSet:
    52  		return getPorts(t.Spec.Template.Spec), nil
    53  	case *appsv1.ReplicaSet:
    54  		return getPorts(t.Spec.Template.Spec), nil
    55  	case *appsv1beta2.ReplicaSet:
    56  		return getPorts(t.Spec.Template.Spec), nil
    57  	default:
    58  		return nil, fmt.Errorf("cannot extract ports from %T", object)
    59  	}
    60  }
    61  
    62  func getPorts(spec corev1.PodSpec) []string {
    63  	var result []string
    64  	exists := map[string]struct{}{}
    65  	for _, container := range spec.Containers {
    66  		for _, port := range container.Ports {
    67  			// remove duplicate ports
    68  			key := strconv.Itoa(int(port.ContainerPort))
    69  			if _, ok := exists[key]; !ok {
    70  				exists[key] = struct{}{}
    71  				result = append(result, key)
    72  			}
    73  		}
    74  	}
    75  	return result
    76  }
    77  
    78  func getServicePorts(spec corev1.ServiceSpec) []string {
    79  	var result []string
    80  	exists := map[string]struct{}{}
    81  	for _, servicePort := range spec.Ports {
    82  		// remove duplicate ports
    83  		key := strconv.Itoa(int(servicePort.Port))
    84  		if _, ok := exists[key]; !ok {
    85  			exists[key] = struct{}{}
    86  			result = append(result, key)
    87  		}
    88  	}
    89  	return result
    90  }
    91
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