github.com/danielqsj/helm@v2.0.0-alpha.4.0.20160908204436-976e0ba5199b+incompatible/cmd/helm/tunnel.go (about) 1 /* 2 Copyright 2016 The Kubernetes Authors All rights reserved. 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 main 18 19 import ( 20 "fmt" 21 22 "k8s.io/kubernetes/pkg/api" 23 "k8s.io/kubernetes/pkg/client/unversioned" 24 "k8s.io/kubernetes/pkg/labels" 25 26 "k8s.io/helm/pkg/kube" 27 ) 28 29 // TODO refactor out this global var 30 var tunnel *kube.Tunnel 31 32 func newTillerPortForwarder(namespace string) (*kube.Tunnel, error) { 33 kc := kube.New(nil) 34 client, err := kc.Client() 35 if err != nil { 36 return nil, err 37 } 38 39 podName, err := getTillerPodName(client, namespace) 40 if err != nil { 41 return nil, err 42 } 43 const tillerPort = 44134 44 return kc.ForwardPort(namespace, podName, tillerPort) 45 } 46 47 func getTillerPodName(client unversioned.PodsNamespacer, namespace string) (string, error) { 48 // TODO use a const for labels 49 selector := labels.Set{"app": "helm", "name": "tiller"}.AsSelector() 50 pod, err := getFirstRunningPod(client, namespace, selector) 51 if err != nil { 52 return "", err 53 } 54 return pod.ObjectMeta.GetName(), nil 55 } 56 57 func getFirstRunningPod(client unversioned.PodsNamespacer, namespace string, selector labels.Selector) (*api.Pod, error) { 58 options := api.ListOptions{LabelSelector: selector} 59 pods, err := client.Pods(namespace).List(options) 60 if err != nil { 61 return nil, err 62 } 63 if len(pods.Items) < 1 { 64 return nil, fmt.Errorf("could not find tiller") 65 } 66 for _, p := range pods.Items { 67 if api.IsPodReady(&p) { 68 return &p, nil 69 } 70 } 71 return nil, fmt.Errorf("could not find a ready pod") 72 }