[17.06 backport] NetworkDB fixes backport

agent.go

@@ -165,13 +165,13 @@ func (c *controller) handleKeyChange(keys []*types.EncryptionKey) error {
 		a.networkDB.SetKey(added)
 	}
 
-	key, tag, err := c.getPrimaryKeyTag(subsysGossip)
+	key, _, err := c.getPrimaryKeyTag(subsysGossip)
 	if err != nil {
 		return err
 	}
 	a.networkDB.SetPrimaryKey(key)
 
-	key, tag, err = c.getPrimaryKeyTag(subsysIPSec)
+	key, tag, err := c.getPrimaryKeyTag(subsysIPSec)
 	if err != nil {
 		return err
 	}
@@ -286,12 +286,12 @@ func (c *controller) agentInit(listenAddr, bindAddrOrInterface, advertiseAddr, d
 	nodeName := hostname + "-" + stringid.TruncateID(stringid.GenerateRandomID())
 	logrus.Info("Gossip cluster hostname ", nodeName)
 
-	nDB, err := networkdb.New(&networkdb.Config{
-		BindAddr:      listenAddr,
-		AdvertiseAddr: advertiseAddr,
-		NodeName:      nodeName,
-		Keys:          keys,
-	})
+	netDBConf := networkdb.DefaultConfig()
+	netDBConf.NodeName = nodeName
+	netDBConf.BindAddr = listenAddr
+	netDBConf.AdvertiseAddr = advertiseAddr
+	netDBConf.Keys = keys
+	nDB, err := networkdb.New(netDBConf)
 
 	if err != nil {
 		return err
@@ -383,15 +383,11 @@ func (c *controller) agentClose() {
 
 	agent.Lock()
 	for _, cancelFuncs := range agent.driverCancelFuncs {
-		for _, cancel := range cancelFuncs {
-			cancelList = append(cancelList, cancel)
-		}
+		cancelList = append(cancelList, cancelFuncs...)
 	}
 
 	// Add also the cancel functions for the network db
-	for _, cancel := range agent.coreCancelFuncs {
-		cancelList = append(cancelList, cancel)
-	}
+	cancelList = append(cancelList, agent.coreCancelFuncs...)
 	agent.Unlock()
 
 	for _, cancel := range cancelList {
@@ -885,31 +881,31 @@ func (c *controller) handleEpTableEvent(ev events.Event) {
 	}
 
 	if isAdd {
-		logrus.Debugf("handleEpTableEvent ADD %s R:%v", isAdd, eid, epRec)
+		logrus.Debugf("handleEpTableEvent ADD %s R:%v", eid, epRec)
 		if svcID != "" {
 			// This is a remote task part of a service
 			if err := c.addServiceBinding(svcName, svcID, nid, eid, containerName, vip, ingressPorts, serviceAliases, taskAliases, ip, "handleEpTableEvent"); err != nil {
-				logrus.Errorf("failed adding service binding for %s epRec:%v err:%s", eid, epRec, err)
+				logrus.Errorf("failed adding service binding for %s epRec:%v err:%v", eid, epRec, err)
 				return
 			}
 		} else {
 			// This is a remote container simply attached to an attachable network
 			if err := c.addContainerNameResolution(nid, eid, containerName, taskAliases, ip, "handleEpTableEvent"); err != nil {
-				logrus.Errorf("failed adding service binding for %s epRec:%v err:%s", eid, epRec, err)
+				logrus.Errorf("failed adding container name resolution for %s epRec:%v err:%v", eid, epRec, err)
 			}
 		}
 	} else {
-		logrus.Debugf("handleEpTableEvent DEL %s R:%v", isAdd, eid, epRec)
+		logrus.Debugf("handleEpTableEvent DEL %s R:%v", eid, epRec)
 		if svcID != "" {
 			// This is a remote task part of a service
 			if err := c.rmServiceBinding(svcName, svcID, nid, eid, containerName, vip, ingressPorts, serviceAliases, taskAliases, ip, "handleEpTableEvent", true); err != nil {
-				logrus.Errorf("failed removing service binding for %s epRec:%v err:%s", eid, epRec, err)
+				logrus.Errorf("failed removing service binding for %s epRec:%v err:%v", eid, epRec, err)
 				return
 			}
 		} else {
 			// This is a remote container simply attached to an attachable network
 			if err := c.delContainerNameResolution(nid, eid, containerName, taskAliases, ip, "handleEpTableEvent"); err != nil {
-				logrus.Errorf("failed adding service binding for %s epRec:%v err:%s", eid, epRec, err)
+				logrus.Errorf("failed removing container name resolution for %s epRec:%v err:%v", eid, epRec, err)
 			}
 		}
 	}

cmd/dnet/dnet.go

@@ -419,11 +419,7 @@ func startTestDriver() error {
 		return err
 	}
 
-	if err := ioutil.WriteFile("/etc/docker/plugins/test.spec", []byte(server.URL), 0644); err != nil {
-		return err
-	}
-
-	return nil
+	return ioutil.WriteFile("/etc/docker/plugins/test.spec", []byte(server.URL), 0644)
 }
 
 func newDnetConnection(val string) (*dnetConnection, error) {

drivers/bridge/bridge.go

@@ -763,11 +763,7 @@ func (d *driver) createNetwork(config *networkConfiguration) error {
 
 	// Apply the prepared list of steps, and abort at the first error.
 	bridgeSetup.queueStep(setupDeviceUp)
-	if err = bridgeSetup.apply(); err != nil {
-		return err
-	}
-
-	return nil
+	return bridgeSetup.apply()
 }
 
 func (d *driver) DeleteNetwork(nid string) error {

drivers/bridge/setup_ip_tables.go

@@ -169,11 +169,7 @@ func setupIPTablesInternal(bridgeIface string, addr net.Addr, icc, ipmasq, hairp
 	}
 
 	// Set Accept on all non-intercontainer outgoing packets.
-	if err := programChainRule(outRule, "ACCEPT NON_ICC OUTGOING", enable); err != nil {
-		return err
-	}
-
-	return nil
+	return programChainRule(outRule, "ACCEPT NON_ICC OUTGOING", enable)
 }
 
 func programChainRule(rule iptRule, ruleDescr string, insert bool) error {
@@ -304,10 +300,7 @@ func setupInternalNetworkRules(bridgeIface string, addr net.Addr, icc, insert bo
 		return err
 	}
 	// Set Inter Container Communication.
-	if err := setIcc(bridgeIface, icc, insert); err != nil {
-		return err
-	}
-	return nil
+	return setIcc(bridgeIface, icc, insert)
 }
 
 func clearEndpointConnections(nlh *netlink.Handle, ep *bridgeEndpoint) {

drivers/overlay/ov_endpoint.go

@@ -144,22 +144,15 @@ func (d *driver) deleteEndpointFromStore(e *endpoint) error {
 		return fmt.Errorf("overlay local store not initialized, ep not deleted")
 	}
 
-	if err := d.localStore.DeleteObjectAtomic(e); err != nil {
-		return err
-	}
-
-	return nil
+	return d.localStore.DeleteObjectAtomic(e)
 }
 
 func (d *driver) writeEndpointToStore(e *endpoint) error {
 	if d.localStore == nil {
 		return fmt.Errorf("overlay local store not initialized, ep not added")
 	}
 
-	if err := d.localStore.PutObjectAtomic(e); err != nil {
-		return err
-	}
-	return nil
+	return d.localStore.PutObjectAtomic(e)
 }
 
 func (ep *endpoint) DataScope() string {

drivers/solaris/overlay/ov_endpoint.go

@@ -134,22 +134,15 @@ func (d *driver) deleteEndpointFromStore(e *endpoint) error {
 		return fmt.Errorf("overlay local store not initialized, ep not deleted")
 	}
 
-	if err := d.localStore.DeleteObjectAtomic(e); err != nil {
-		return err
-	}
-
-	return nil
+	return d.localStore.DeleteObjectAtomic(e)
 }
 
 func (d *driver) writeEndpointToStore(e *endpoint) error {
 	if d.localStore == nil {
 		return fmt.Errorf("overlay local store not initialized, ep not added")
 	}
 
-	if err := d.localStore.PutObjectAtomic(e); err != nil {
-		return err
-	}
-	return nil
+	return d.localStore.PutObjectAtomic(e)
 }
 
 func (ep *endpoint) DataScope() string {

endpoint_info.go

@@ -201,11 +201,7 @@ func (ep *endpoint) Info() EndpointInfo {
 		return ep
 	}
 
-	if epi := sb.getEndpoint(ep.ID()); epi != nil {
-		return epi
-	}
-
-	return nil
+	return sb.getEndpoint(ep.ID())
 }
 
 func (ep *endpoint) Iface() InterfaceInfo {

iptables/iptables.go

@@ -276,11 +276,7 @@ func (c *ChainInfo) Forward(action Action, ip net.IP, port int, proto, destAddr
 		"--dport", strconv.Itoa(destPort),
 		"-j", "MASQUERADE",
 	}
-	if err := ProgramRule(Nat, "POSTROUTING", action, args); err != nil {
-		return err
-	}
-
-	return nil
+	return ProgramRule(Nat, "POSTROUTING", action, args)
 }
 
 // Link adds reciprocal ACCEPT rule for two supplied IP addresses.
@@ -301,10 +297,7 @@ func (c *ChainInfo) Link(action Action, ip1, ip2 net.IP, port int, proto string,
 	// reverse
 	args[7], args[9] = args[9], args[7]
 	args[10] = "--sport"
-	if err := ProgramRule(Filter, c.Name, action, args); err != nil {
-		return err
-	}
-	return nil
+	return ProgramRule(Filter, c.Name, action, args)
 }
 
 // ProgramRule adds the rule specified by args only if the

networkdb/broadcast.go

@@ -134,6 +134,8 @@ func (nDB *NetworkDB) sendTableEvent(event TableEvent_Type, nid string, tname st
 		TableName: tname,
 		Key:       key,
 		Value:     entry.value,
+		// The duration in second is a float that below would be truncated
+		ResidualReapTime: int32(entry.reapTime.Seconds()),
 	}
 
 	raw, err := encodeMessage(MessageTypeTableEvent, &tEvent)