Merge pull request #758 from adamreese/feat/tunnel2

feat(tunnel): add logic for detecting tiller pod

cmd/helm/tunnel.go

+package main
+
+import (
+	"fmt"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/labels"
+
+	"github.com/kubernetes/helm/pkg/kube"
+)
+
+func newTillerPortForwarder() (*kube.Tunnel, error) {
+	podName, err := getTillerPodName("helm")
+	if err != nil {
+		return nil, err
+	}
+	return kube.New(nil).ForwardPort("helm", podName, 44134)
+}
+
+func getTillerPodName(namespace string) (string, error) {
+	client, err := kube.New(nil).Client()
+	if err != nil {
+		return "", err
+	}
+
+	selector := labels.Set{"app": "helm", "name": "tiller"}.AsSelector()
+	options := api.ListOptions{LabelSelector: selector}
+	pods, err := client.Pods(namespace).List(options)
+	if err != nil {
+		return "", err
+	}
+	if len(pods.Items) < 1 {
+		return "", fmt.Errorf("I could not find tiller")
+	}
+	return pods.Items[0].ObjectMeta.GetName(), nil
+}

pkg/kube/tunnel.go

@@ -10,6 +10,7 @@ import (
 	"k8s.io/kubernetes/pkg/client/unversioned/remotecommand"
 )
 
+// Tunnel describes a ssh-like tunnel to a kubernetes pod
 type Tunnel struct {
 	Local    int
 	Remote   int
@@ -33,7 +34,8 @@ func (c *Client) ForwardPort(namespace, podName string, remote int) (*Tunnel, er
 		return nil, err
 	}
 
-	// http://192.168.64.94:8080/api/v1/namespaces/helm/pods/tiller-rc-9itlq/portforward
+	// Build a url to the portforward endpoing
+	// example: http://localhost:8080/api/v1/namespaces/helm/pods/tiller-rc-9itlq/portforward
 	u := client.RESTClient.Post().
 		Resource("pods").
 		Namespace(namespace).