Make getSchedulingLatency use master proxy

docs/admin/kube-scheduler.md

@@ -53,7 +53,7 @@ kube-scheduler
 ### Options
 
 ```
-      --address=127.0.0.1: The IP address to serve on (set to 0.0.0.0 for all interfaces)
+      --address=0.0.0.0: The IP address to serve on (set to 0.0.0.0 for all interfaces)
       --algorithm-provider="DefaultProvider": The scheduling algorithm provider to use, one of: DefaultProvider
       --bind-pods-burst=100: Number of bindings per second scheduler is allowed to make during bursts
       --bind-pods-qps=50: Number of bindings per second scheduler is allowed to continuously make
@@ -68,7 +68,7 @@ kube-scheduler
       --profiling[=true]: Enable profiling via web interface host:port/debug/pprof/
 ```
 
-###### Auto generated by spf13/cobra on 13-Oct-2015
+###### Auto generated by spf13/cobra on 14-Dec-2015
 
 
 <!-- BEGIN MUNGE: GENERATED_ANALYTICS -->

plugin/cmd/kube-scheduler/app/server.go

@@ -64,7 +64,7 @@ type SchedulerServer struct {
 func NewSchedulerServer() *SchedulerServer {
 	s := SchedulerServer{
 		Port:              ports.SchedulerPort,
-		Address:           net.ParseIP("127.0.0.1"),
+		Address:           net.ParseIP("0.0.0.0"),
 		AlgorithmProvider: factory.DefaultProvider,
 		BindPodsQPS:       50.0,
 		BindPodsBurst:     100,

test/e2e/density.go

@@ -145,7 +145,7 @@ var _ = Describe("Density [Skipped]", func() {
 		// Verify scheduler metrics.
 		// TODO: Reset metrics at the beginning of the test.
 		// We should do something similar to how we do it for APIserver.
-		expectNoError(VerifySchedulerLatency())
+		expectNoError(VerifySchedulerLatency(c))
 	})
 
 	// Explicitly put here, to delete namespace at the end of the test

test/e2e/metrics_util.go

@@ -31,6 +31,7 @@ import (
 
 	"k8s.io/kubernetes/pkg/api"
 	client "k8s.io/kubernetes/pkg/client/unversioned"
+	"k8s.io/kubernetes/pkg/master/ports"
 	"k8s.io/kubernetes/pkg/util/sets"
 
 	"github.com/prometheus/common/expfmt"
@@ -256,15 +257,41 @@ func getMetrics(c *client.Client) (string, error) {
 }
 
 // Retrieves scheduler metrics information.
-func getSchedulingLatency() (SchedulingLatency, error) {
+func getSchedulingLatency(c *client.Client) (SchedulingLatency, error) {
 	result := SchedulingLatency{}
 
-	cmd := "curl http://localhost:10251/metrics"
-	sshResult, err := SSH(cmd, getMasterHost()+":22", testContext.Provider)
-	if err != nil || sshResult.Code != 0 {
-		return result, fmt.Errorf("unexpected error (code: %d) in ssh connection to master: %#v", sshResult.Code, err)
+	// Check if master Node is registered
+	nodes, err := c.Nodes().List(api.ListOptions{})
+	expectNoError(err)
+
+	var data string
+	var masterRegistered = false
+	for _, node := range nodes.Items {
+		if strings.HasSuffix(node.Name, "master") {
+			masterRegistered = true
+		}
+	}
+	if masterRegistered {
+		rawData, err := c.Get().
+			Prefix("proxy").
+			Namespace(api.NamespaceSystem).
+			Resource("pods").
+			Name(fmt.Sprintf("kube-scheduler-%v:%v", testContext.CloudConfig.MasterName, ports.SchedulerPort)).
+			Suffix("metrics").
+			Do().Raw()
+
+		expectNoError(err)
+		data = string(rawData)
+	} else {
+		// If master is not registered fall back to old method of using SSH.
+		cmd := "curl http://localhost:10251/metrics"
+		sshResult, err := SSH(cmd, getMasterHost()+":22", testContext.Provider)
+		if err != nil || sshResult.Code != 0 {
+			return result, fmt.Errorf("unexpected error (code: %d) in ssh connection to master: %#v", sshResult.Code, err)
+		}
+		data = sshResult.Stdout
 	}
-	samples, err := extractMetricSamples(sshResult.Stdout)
+	samples, err := extractMetricSamples(data)
 	if err != nil {
 		return result, err
 	}
@@ -294,8 +321,8 @@ func getSchedulingLatency() (SchedulingLatency, error) {
 }
 
 // Verifies (currently just by logging them) the scheduling latencies.
-func VerifySchedulerLatency() error {
-	latency, err := getSchedulingLatency()
+func VerifySchedulerLatency(c *client.Client) error {
+	latency, err := getSchedulingLatency(c)
 	if err != nil {
 		return err
 	}