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62 lines
2.2 KiB
Go
62 lines
2.2 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package pod
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import (
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"fmt"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/util/intstr"
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)
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const (
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// TODO: to be de!eted after v1.3 is released. PodSpec has a dedicated Hostname field.
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// The annotation value is a string specifying the hostname to be used for the pod e.g 'my-webserver-1'
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PodHostnameAnnotation = "pod.beta.kubernetes.io/hostname"
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// TODO: to be de!eted after v1.3 is released. PodSpec has a dedicated Subdomain field.
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// The annotation value is a string specifying the subdomain e.g. "my-web-service"
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// If specified, on the the pod itself, "<hostname>.my-web-service.<namespace>.svc.<cluster domain>" would resolve to
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// the pod's IP.
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// If there is a headless service named "my-web-service" in the same namespace as the pod, then,
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// <hostname>.my-web-service.<namespace>.svc.<cluster domain>" would be resolved by the cluster DNS Server.
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PodSubdomainAnnotation = "pod.beta.kubernetes.io/subdomain"
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)
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// FindPort locates the container port for the given pod and portName. If the
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// targetPort is a number, use that. If the targetPort is a string, look that
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// string up in all named ports in all containers in the target pod. If no
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// match is found, fail.
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func FindPort(pod *api.Pod, svcPort *api.ServicePort) (int, error) {
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portName := svcPort.TargetPort
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switch portName.Type {
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case intstr.String:
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name := portName.StrVal
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for _, container := range pod.Spec.Containers {
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for _, port := range container.Ports {
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if port.Name == name && port.Protocol == svcPort.Protocol {
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return int(port.ContainerPort), nil
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}
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}
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}
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case intstr.Int:
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return portName.IntValue(), nil
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}
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return 0, fmt.Errorf("no suitable port for manifest: %s", pod.UID)
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}
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