Change hard coded leastLoadedNode=[3rd node] to searching for leastLoadedNode worker node

Accomodate dee89a6cc1

And format files according to gofmt verification

update version to 1.11.1

.travis.yml

@@ -3,7 +3,7 @@ sudo: false
 language: go
 
 go:
-  - 1.9.1
+  - 1.11.1
 services:
   - docker
 before_script:
@@ -19,6 +19,7 @@ before_script:
   - cp "$(kind get kubeconfig-path --name="kind")" /tmp/admin.conf
 script:
 - hack/verify-gofmt.sh
+- make lint
 - make build
 - make test-unit
 - make test-e2e

hack/verify-gofmt.sh

@@ -23,7 +23,7 @@ DESCHEDULER_ROOT=$(dirname "${BASH_SOURCE}")/..
 
 GO_VERSION=($(go version))
 
-if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.2|go1.3|go1.4|go1.5|go1.6|go1.7|go1.8|go1.9|go1.10') ]]; then
+if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.2|go1.3|go1.4|go1.5|go1.6|go1.7|go1.8|go1.9|go1.10|go1.11') ]]; then
   echo "Unknown go version '${GO_VERSION[2]}', skipping gofmt."
   exit 1
 fi

test/e2e/e2e_test.go

@@ -18,6 +18,7 @@ package e2e
 
 import (
 	"github.com/golang/glog"
+	"math"
 	"testing"
 	"time"
 
@@ -120,7 +121,8 @@ func startEndToEndForLowNodeUtilization(clientset clientset.Interface) {
 
 func TestE2E(t *testing.T) {
 	// If we have reached here, it means cluster would have been already setup and the kubeconfig file should
-	// be in /tmp directory.
+	// be in /tmp directory as admin.conf.
+	var leastLoadedNode v1.Node
 	clientSet, err := client.CreateClient("/tmp/admin.conf")
 	if err != nil {
 		t.Errorf("Error during client creation with %v", err)
@@ -131,20 +133,31 @@ func TestE2E(t *testing.T) {
 	}
 	// Assumption: We would have 3 node cluster by now. Kubeadm brings all the master components onto master node.
 	// So, the last node would have least utilization.
-	leastLoadedNode := nodeList.Items[2]
 	rc := RcByNameContainer("test-rc", int32(15), map[string]string{"test": "app"}, nil)
 	_, err = clientSet.CoreV1().ReplicationControllers("default").Create(rc)
 	if err != nil {
 		t.Errorf("Error creating deployment %v", err)
 	}
-	podsOnleastUtilizedNode, err := podutil.ListPodsOnANode(clientSet, &leastLoadedNode)
-	if err != nil {
-		t.Errorf("Error listing pods on a node %v", err)
+	podsBefore := math.MaxInt16
+	for i := range nodeList.Items {
+		// Skip the Master Node
+		if _, exist := nodeList.Items[i].Labels["node-role.kubernetes.io/master"]; exist {
+			continue
+		}
+		// List all the pods on the current Node
+		podsOnANode, err := podutil.ListEvictablePodsOnNode(clientSet, &nodeList.Items[i], true)
+		if err != nil {
+			t.Errorf("Error listing pods on a node %v", err)
+		}
+		// Update leastLoadedNode if necessary
+		if tmpLoads := len(podsOnANode); tmpLoads < podsBefore {
+			leastLoadedNode = nodeList.Items[i]
+			podsBefore = tmpLoads
+		}
 	}
-	podsBefore := len(podsOnleastUtilizedNode)
 	t.Log("Eviction of pods starting")
 	startEndToEndForLowNodeUtilization(clientSet)
-	podsOnleastUtilizedNode, err = podutil.ListPodsOnANode(clientSet, &leastLoadedNode)
+	podsOnleastUtilizedNode, err := podutil.ListEvictablePodsOnNode(clientSet, &leastLoadedNode, true)
 	if err != nil {
 		t.Errorf("Error listing pods on a node %v", err)
 	}