Fix ports mapping in case of discontinuous port ranges in mesos offer

update elements in wildports directly instead of copy of the value
from wildports.

contrib/mesos/pkg/scheduler/podtask/port_mapping.go

@@ -99,16 +99,16 @@ func wildcardHostPortMapping(t *T, offer *mesos.Offer) ([]HostPortMapping, error
 	remaining := len(wildports)
 	foreachRange(offer, "ports", func(bp, ep uint64) {
 		log.V(3).Infof("Searching for wildcard port in range {%d:%d}", bp, ep)
-		for _, entry := range wildports {
-			if entry.OfferPort != 0 {
+		for i := range wildports {
+			if wildports[i].OfferPort != 0 {
 				continue
 			}
 			for port := bp; port <= ep && remaining > 0; port++ {
 				if _, inuse := taken[port]; inuse {
 					continue
 				}
-				entry.OfferPort = port
-				mapping = append(mapping, entry)
+				wildports[i].OfferPort = port
+				mapping = append(mapping, wildports[i])
 				remaining--
 				taken[port] = struct{}{}
 				break

contrib/mesos/pkg/scheduler/podtask/port_mapping_test.go

@@ -20,6 +20,7 @@ import (
 	"testing"
 
 	mesos "github.com/mesos/mesos-go/mesosproto"
+	"github.com/mesos/mesos-go/mesosutil"
 	"k8s.io/kubernetes/pkg/api"
 )
 
@@ -178,6 +179,44 @@ func TestWildcardHostPortMatching(t *testing.T) {
 	if valid < 2 {
 		t.Fatalf("Expected 2 valid port mappings, not %d", valid)
 	}
+
+	//-- port mapping in case of multiple discontinuous port ranges in mesos offer
+	pod.Spec = api.PodSpec{
+		Containers: []api.Container{{
+			Ports: []api.ContainerPort{{
+				HostPort: 0,
+			}, {
+				HostPort: 0,
+			}},
+		}},
+	}
+	task, err = New(api.NewDefaultContext(), "", *pod, &mesos.ExecutorInfo{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	offer = &mesos.Offer{
+		Resources: []*mesos.Resource{
+			mesosutil.NewRangesResource("ports", []*mesos.Value_Range{mesosutil.NewValueRange(1, 1), mesosutil.NewValueRange(3, 5)}),
+		},
+	}
+	mapping, err = wildcardHostPortMapping(task, offer)
+	if err != nil {
+		t.Fatal(err)
+	} else if len(mapping) != 2 {
+		t.Fatal("Expected both ports allocated")
+	}
+	valid = 0
+	for _, entry := range mapping {
+		if entry.ContainerIdx == 0 && entry.PortIdx == 0 && entry.OfferPort == 1 {
+			valid++
+		}
+		if entry.ContainerIdx == 0 && entry.PortIdx == 1 && entry.OfferPort == 3 {
+			valid++
+		}
+	}
+	if valid < 2 {
+		t.Fatalf("Expected 2 valid port mappings, not %d", valid)
+	}
 }
 
 func TestMappingTypeForPod(t *testing.T) {