Add warning message for the failure of deleting link device

Signed-off-by: ZhiPeng Lu <lu.zhipeng@zte.com.cn>

libnetwork/drivers/bridge/bridge.go

@@ -782,7 +782,9 @@ func (d *driver) deleteNetwork(nid string) error {
 			logrus.Warn(err)
 		}
 		if link, err := d.nlh.LinkByName(ep.srcName); err == nil {
-			d.nlh.LinkDel(link)
+			if err := d.nlh.LinkDel(link); err != nil {
+				logrus.WithError(err).Errorf("Failed to delete interface (%s)'s link on endpoint (%s) delete", ep.srcName, ep.id)
+			}
 		}
 
 		if err := d.storeDelete(ep); err != nil {
@@ -969,7 +971,9 @@ func (d *driver) CreateEndpoint(nid, eid string, ifInfo driverapi.InterfaceInfo,
 	}
 	defer func() {
 		if err != nil {
-			d.nlh.LinkDel(host)
+			if err := d.nlh.LinkDel(host); err != nil {
+				logrus.WithError(err).Warnf("Failed to delete host side interface (%s)'s link", hostIfName)
+			}
 		}
 	}()
 
@@ -980,7 +984,9 @@ func (d *driver) CreateEndpoint(nid, eid string, ifInfo driverapi.InterfaceInfo,
 	}
 	defer func() {
 		if err != nil {
-			d.nlh.LinkDel(sbox)
+			if err := d.nlh.LinkDel(sbox); err != nil {
+				logrus.WithError(err).Warnf("Failed to delete sandbox side interface (%s)'s link", containerIfName)
+			}
 		}
 	}()
 
@@ -1117,7 +1123,9 @@ func (d *driver) DeleteEndpoint(nid, eid string) error {
 	// Try removal of link. Discard error: it is a best effort.
 	// Also make sure defer does not see this error either.
 	if link, err := d.nlh.LinkByName(ep.srcName); err == nil {
-		d.nlh.LinkDel(link)
+		if err := d.nlh.LinkDel(link); err != nil {
+			logrus.WithError(err).Errorf("Failed to delete interface (%s)'s link on endpoint (%s) delete", ep.srcName, ep.id)
+		}
 	}
 
 	if err := d.storeDelete(ep); err != nil {

libnetwork/drivers/ipvlan/ipvlan_endpoint.go

@@ -76,7 +76,9 @@ func (d *driver) DeleteEndpoint(nid, eid string) error {
 		return fmt.Errorf("endpoint id %q not found", eid)
 	}
 	if link, err := ns.NlHandle().LinkByName(ep.srcName); err == nil {
-		ns.NlHandle().LinkDel(link)
+		if err := ns.NlHandle().LinkDel(link); err != nil {
+			logrus.WithError(err).Warnf("Failed to delete interface (%s)'s link on endpoint (%s) delete", ep.srcName, ep.id)
+		}
 	}
 
 	if err := d.storeDelete(ep); err != nil {

libnetwork/drivers/ipvlan/ipvlan_network.go

@@ -150,7 +150,9 @@ func (d *driver) DeleteNetwork(nid string) error {
 	}
 	for _, ep := range n.endpoints {
 		if link, err := ns.NlHandle().LinkByName(ep.srcName); err == nil {
-			ns.NlHandle().LinkDel(link)
+			if err := ns.NlHandle().LinkDel(link); err != nil {
+				logrus.WithError(err).Warnf("Failed to delete interface (%s)'s link on endpoint (%s) delete", ep.srcName, ep.id)
+			}
 		}
 
 		if err := d.storeDelete(ep); err != nil {

libnetwork/drivers/macvlan/macvlan_endpoint.go

@@ -81,7 +81,9 @@ func (d *driver) DeleteEndpoint(nid, eid string) error {
 		return fmt.Errorf("endpoint id %q not found", eid)
 	}
 	if link, err := ns.NlHandle().LinkByName(ep.srcName); err == nil {
-		ns.NlHandle().LinkDel(link)
+		if err := ns.NlHandle().LinkDel(link); err != nil {
+			logrus.WithError(err).Warnf("Failed to delete interface (%s)'s link on endpoint (%s) delete", ep.srcName, ep.id)
+		}
 	}
 
 	if err := d.storeDelete(ep); err != nil {

libnetwork/drivers/macvlan/macvlan_network.go

@@ -154,7 +154,9 @@ func (d *driver) DeleteNetwork(nid string) error {
 	}
 	for _, ep := range n.endpoints {
 		if link, err := ns.NlHandle().LinkByName(ep.srcName); err == nil {
-			ns.NlHandle().LinkDel(link)
+			if err := ns.NlHandle().LinkDel(link); err != nil {
+				logrus.WithError(err).Warnf("Failed to delete interface (%s)'s link on endpoint (%s) delete", ep.srcName, ep.id)
+			}
 		}
 
 		if err := d.storeDelete(ep); err != nil {

libnetwork/drivers/overlay/ov_network.go

@@ -243,7 +243,9 @@ func (d *driver) DeleteNetwork(nid string) error {
 	for _, ep := range n.endpoints {
 		if ep.ifName != "" {
 			if link, err := ns.NlHandle().LinkByName(ep.ifName); err == nil {
-				ns.NlHandle().LinkDel(link)
+				if err := ns.NlHandle().LinkDel(link); err != nil {
+					logrus.WithError(err).Warnf("Failed to delete interface (%s)'s link on endpoint (%s) delete", ep.ifName, ep.id)
+				}
 			}
 		}