Update health monitor to also use better node matching logic

Issue #144

drivers/volume/volume.go

@@ -1,6 +1,8 @@
 package volume
 
 import (
+	"strings"
+
 	snapshotVolume "github.com/kubernetes-incubator/external-storage/snapshot/pkg/volume"
 	"github.com/libopenstorage/stork/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -97,7 +99,7 @@ func Register(name string, d Driver) error {
 	return nil
 }
 
-// Get an external storage provider to be used with Stork.
+// Get an external storage provider to be used with Stork
 func Get(name string) (Driver, error) {
 	d, ok := volDrivers[name]
 	if ok {
@@ -109,3 +111,43 @@ func Get(name string) (Driver, error) {
 		Type: "VolumeDriver",
 	}
 }
+
+// IsNodeMatch There are a couple of things that need to be checked to see if the driver
+// node matched the k8s node since different k8s installs set the node name,
+// hostname and IPs differently
+func IsNodeMatch(k8sNode *v1.Node, driverNode *NodeInfo) bool {
+	if driverNode == nil {
+		return false
+	}
+
+	if isHostnameMatch(driverNode.ID, k8sNode.Name) {
+		return true
+	}
+	for _, address := range k8sNode.Status.Addresses {
+		switch address.Type {
+		case v1.NodeHostName:
+			if isHostnameMatch(driverNode.Hostname, address.Address) {
+				return true
+			}
+		case v1.NodeInternalIP:
+			for _, ip := range driverNode.IPs {
+				if ip == address.Address {
+					return true
+				}
+			}
+		}
+	}
+	return false
+}
+
+// The driver might not return fully qualified hostnames, so check if the short
+// hostname matches too
+func isHostnameMatch(driverHostname string, k8sHostname string) bool {
+	if driverHostname == k8sHostname {
+		return true
+	}
+	if strings.HasPrefix(k8sHostname, driverHostname+".") {
+		return true
+	}
+	return false
+}

pkg/extender/extender.go

@@ -102,46 +102,6 @@ func (e *Extender) getHostname(node *v1.Node) string {
 	return ""
 }
 
-// There are a couple of things that need to be checked to see if the driver
-// node matched the k8s node since different k8s installs set the node name,
-// hostname and IPs differently
-func (e *Extender) isNodeMatch(k8sNode *v1.Node, driverNode *volume.NodeInfo) bool {
-	if driverNode == nil {
-		return false
-	}
-
-	if e.isHostnameMatch(driverNode.ID, k8sNode.Name) {
-		return true
-	}
-	for _, address := range k8sNode.Status.Addresses {
-		switch address.Type {
-		case v1.NodeHostName:
-			if e.isHostnameMatch(driverNode.Hostname, address.Address) {
-				return true
-			}
-		case v1.NodeInternalIP:
-			for _, ip := range driverNode.IPs {
-				if ip == address.Address {
-					return true
-				}
-			}
-		}
-	}
-	return false
-}
-
-// The driver might not return fully qualified hostnames, so check if the short
-// hostname matches too
-func (e *Extender) isHostnameMatch(driverHostname string, k8sHostname string) bool {
-	if driverHostname == k8sHostname {
-		return true
-	}
-	if strings.HasPrefix(k8sHostname, driverHostname+".") {
-		return true
-	}
-	return false
-}
-
 func (e *Extender) processFilterRequest(w http.ResponseWriter, req *http.Request) {
 	decoder := json.NewDecoder(req.Body)
 	defer func() {
@@ -181,7 +141,7 @@ func (e *Extender) processFilterRequest(w http.ResponseWriter, req *http.Request
 				for _, driverNode := range driverNodes {
 					storklog.PodLog(pod).Debugf("nodeInfo: %v", driverNode)
 					if driverNode.Status == volume.NodeOnline &&
-						e.isNodeMatch(&node, driverNode) {
+						volume.IsNodeMatch(&node, driverNode) {
 						filteredNodes = append(filteredNodes, node)
 						break
 					}
@@ -240,7 +200,7 @@ func (e *Extender) getNodeScore(
 						for _, rack := range rackInfo.PreferredLocality {
 							if rack == nodeRack || nodeRack == "" {
 								for _, datanode := range volumeInfo.DataNodes {
-									if e.isNodeMatch(&node, idMap[datanode]) {
+									if volume.IsNodeMatch(&node, idMap[datanode]) {
 										return nodePriorityScore
 									}
 								}
@@ -326,7 +286,7 @@ func (e *Extender) processPrioritizeRequest(w http.ResponseWriter, req *http.Req
 			// Replace driver's hostname with the kubernetes hostname to make it
 			// easier to match nodes when calculating scores
 			for _, knode := range args.Nodes.Items {
-				if e.isNodeMatch(&knode, dnode) {
+				if volume.IsNodeMatch(&knode, dnode) {
 					dnode.Hostname = e.getHostname(&knode)
 					break
 				}

pkg/monitor/monitor.go

@@ -68,6 +68,18 @@ func (m *Monitor) Stop() error {
 	return nil
 }
 
+func (m *Monitor) isSameNode(k8sNodeName string, driverNode *volume.NodeInfo) bool {
+	if k8sNodeName == driverNode.Hostname {
+		return true
+	}
+	node, err := k8s.Instance().GetNodeByName(k8sNodeName)
+	if err != nil {
+		log.Errorf("Error getting node %v: %v", k8sNodeName, err)
+		return false
+	}
+	return volume.IsNodeMatch(node, driverNode)
+}
+
 func (m *Monitor) driverMonitor() {
 	defer close(m.done)
 	for {
@@ -102,7 +114,7 @@ func (m *Monitor) driverMonitor() {
 							continue
 						}
 
-						if pod.Spec.NodeName == node.Hostname &&
+						if m.isSameNode(pod.Spec.NodeName, node) &&
 							(pod.Status.Phase == v1.PodRunning || pod.Status.Phase == v1.PodFailed) {
 							storklog.PodLog(&pod).Infof("Deleting Pod from Node: %v", pod.Spec.NodeName)
 							err = k8s.Instance().DeletePods([]v1.Pod{pod}, true)