Merge pull request #21780 from sanimej/libn-v0.7rc2

Vendor Libnetwork v0.7.0-rc.3

hack/vendor.sh

@@ -29,7 +29,7 @@ clone git github.com/RackSec/srslog 259aed10dfa74ea2961eddd1d9847619f6e98837
 clone git github.com/imdario/mergo 0.2.1
 
 #get libnetwork packages
-clone git github.com/docker/libnetwork v0.7.0-rc.1
+clone git github.com/docker/libnetwork v0.7.0-rc.3
 clone git github.com/armon/go-metrics eb0af217e5e9747e41dd5303755356b62d28e3ec
 clone git github.com/hashicorp/go-msgpack 71c2886f5a673a35f909803f38ece5810165097b
 clone git github.com/hashicorp/memberlist 9a1e242e454d2443df330bdd51a436d5a9058fc4

vendor/src/github.com/docker/libnetwork/CHANGELOG.md

@@ -1,5 +1,15 @@
 # Changelog
 
+## 0.7.0-rc.3 (2016-04-05)
+- Revert fix for default gateway endoint join/leave. Needs to be reworked.
+- Persist the network internal mode for bridge networks
+
+## 0.7.0-rc.2 (2016-04-05)
+- Fixes https://github.com/docker/libnetwork/issues/1070
+- Move IPAM resource initialization out of init()
+- Initialize overlay driver before network delete 
+- Fix the handling for default gateway Endpoint join/lean 
+
 ## 0.7.0-rc.1 (2016-03-30)
 - Fixes https://github.com/docker/libnetwork/issues/985
 - Fixes https://github.com/docker/libnetwork/issues/945

vendor/src/github.com/docker/libnetwork/drivers/bridge/bridge_store.go

@@ -95,6 +95,7 @@ func (ncfg *networkConfiguration) MarshalJSON() ([]byte, error) {
 	nMap["EnableIPMasquerade"] = ncfg.EnableIPMasquerade
 	nMap["EnableICC"] = ncfg.EnableICC
 	nMap["Mtu"] = ncfg.Mtu
+	nMap["Internal"] = ncfg.Internal
 	nMap["DefaultBridge"] = ncfg.DefaultBridge
 	nMap["DefaultBindingIP"] = ncfg.DefaultBindingIP.String()
 	nMap["DefaultGatewayIPv4"] = ncfg.DefaultGatewayIPv4.String()
@@ -143,6 +144,9 @@ func (ncfg *networkConfiguration) UnmarshalJSON(b []byte) error {
 	ncfg.EnableIPMasquerade = nMap["EnableIPMasquerade"].(bool)
 	ncfg.EnableICC = nMap["EnableICC"].(bool)
 	ncfg.Mtu = int(nMap["Mtu"].(float64))
+	if v, ok := nMap["Internal"]; ok {
+		ncfg.Internal = v.(bool)
+	}
 
 	return nil
 }

vendor/src/github.com/docker/libnetwork/drivers/overlay/ov_network.go

@@ -104,6 +104,11 @@ func (d *driver) DeleteNetwork(nid string) error {
 		return fmt.Errorf("invalid network id")
 	}
 
+	// Make sure driver resources are initialized before proceeding
+	if err := d.configure(); err != nil {
+		return err
+	}
+
 	n := d.network(nid)
 	if n == nil {
 		return fmt.Errorf("could not find network with id %s", nid)

vendor/src/github.com/docker/libnetwork/ipams/builtin/builtin_unix.go

@@ -8,6 +8,7 @@ import (
 	"github.com/docker/libnetwork/datastore"
 	"github.com/docker/libnetwork/ipam"
 	"github.com/docker/libnetwork/ipamapi"
+	"github.com/docker/libnetwork/ipamutils"
 )
 
 // Init registers the built-in ipam service with libnetwork
@@ -28,6 +29,9 @@ func Init(ic ipamapi.Callback, l, g interface{}) error {
 			return fmt.Errorf("incorrect global datastore passed to built-in ipam init")
 		}
 	}
+
+	ipamutils.InitNetworks()
+
 	a, err := ipam.NewAllocator(localDs, globalDs)
 	if err != nil {
 		return err

vendor/src/github.com/docker/libnetwork/ipamutils/utils.go

@@ -1,7 +1,10 @@
 // Package ipamutils provides utililty functions for ipam management
 package ipamutils
 
-import "net"
+import (
+	"net"
+	"sync"
+)
 
 var (
 	// PredefinedBroadNetworks contains a list of 31 IPv4 private networks with host size 16 and 12
@@ -10,11 +13,16 @@ var (
 	// PredefinedGranularNetworks contains a list of 64K IPv4 private networks with host size 8
 	// (10.x.x.x/24) which do not overlap with the networks in `PredefinedBroadNetworks`
 	PredefinedGranularNetworks []*net.IPNet
+
+	initNetworksOnce sync.Once
 )
 
-func init() {
-	PredefinedBroadNetworks = initBroadPredefinedNetworks()
-	PredefinedGranularNetworks = initGranularPredefinedNetworks()
+// InitNetworks initializes the pre-defined networks used by the  built-in IP allocator
+func InitNetworks() {
+	initNetworksOnce.Do(func() {
+		PredefinedBroadNetworks = initBroadPredefinedNetworks()
+		PredefinedGranularNetworks = initGranularPredefinedNetworks()
+	})
 }
 
 func initBroadPredefinedNetworks() []*net.IPNet {

vendor/src/github.com/docker/libnetwork/ipamutils/utils_linux.go

@@ -22,6 +22,8 @@ func ElectInterfaceAddresses(name string) (*net.IPNet, []*net.IPNet, error) {
 		err    error
 	)
 
+	InitNetworks()
+
 	defer osl.InitOSContext()()
 
 	link, _ := netlink.LinkByName(name)

vendor/src/github.com/docker/libnetwork/resolver.go

@@ -49,8 +49,14 @@ const (
 	defaultRespSize = 512
 	maxConcurrent   = 50
 	logInterval     = 2 * time.Second
+	maxDNSID        = 65536
 )
 
+type clientConn struct {
+	dnsID      uint16
+	respWriter dns.ResponseWriter
+}
+
 type extDNSEntry struct {
 	ipStr   string
 	extConn net.Conn
@@ -69,6 +75,7 @@ type resolver struct {
 	count      int32
 	tStamp     time.Time
 	queryLock  sync.Mutex
+	client     map[uint16]clientConn
 }
 
 func init() {
@@ -78,8 +85,9 @@ func init() {
 // NewResolver creates a new instance of the Resolver
 func NewResolver(sb *sandbox) Resolver {
 	return &resolver{
-		sb:  sb,
-		err: fmt.Errorf("setup not done yet"),
+		sb:     sb,
+		err:    fmt.Errorf("setup not done yet"),
+		client: make(map[uint16]clientConn),
 	}
 }
 
@@ -375,7 +383,9 @@ func (r *resolver) ServeDNS(w dns.ResponseWriter, query *dns.Msg) {
 			extConn.SetDeadline(time.Now().Add(extIOTimeout))
 			co := &dns.Conn{Conn: extConn}
 
-			if r.concurrentQueryInc() == false {
+			// forwardQueryStart stores required context to mux multiple client queries over
+			// one connection; and limits the number of outstanding concurrent queries.
+			if r.forwardQueryStart(w, query) == false {
 				old := r.tStamp
 				r.tStamp = time.Now()
 				if r.tStamp.Sub(old) > logInterval {
@@ -391,18 +401,25 @@ func (r *resolver) ServeDNS(w dns.ResponseWriter, query *dns.Msg) {
 			}()
 			err = co.WriteMsg(query)
 			if err != nil {
-				r.concurrentQueryDec()
+				r.forwardQueryEnd(w, query)
 				log.Debugf("Send to DNS server failed, %s", err)
 				continue
 			}
 
 			resp, err = co.ReadMsg()
-			r.concurrentQueryDec()
 			if err != nil {
+				r.forwardQueryEnd(w, query)
 				log.Debugf("Read from DNS server failed, %s", err)
 				continue
 			}
 
+			// Retrieves the context for the forwarded query and returns the client connection
+			// to send the reply to
+			w = r.forwardQueryEnd(w, resp)
+			if w == nil {
+				continue
+			}
+
 			resp.Compress = true
 			break
 		}
@@ -418,22 +435,71 @@ func (r *resolver) ServeDNS(w dns.ResponseWriter, query *dns.Msg) {
 	}
 }
 
-func (r *resolver) concurrentQueryInc() bool {
+func (r *resolver) forwardQueryStart(w dns.ResponseWriter, msg *dns.Msg) bool {
+	proto := w.LocalAddr().Network()
+	dnsID := uint16(rand.Intn(maxDNSID))
+
+	cc := clientConn{
+		dnsID:      msg.Id,
+		respWriter: w,
+	}
+
 	r.queryLock.Lock()
 	defer r.queryLock.Unlock()
+
 	if r.count == maxConcurrent {
 		return false
 	}
 	r.count++
+
+	switch proto {
+	case "tcp":
+		break
+	case "udp":
+		for ok := true; ok == true; dnsID = uint16(rand.Intn(maxDNSID)) {
+			_, ok = r.client[dnsID]
+		}
+		log.Debugf("client dns id %v, changed id %v", msg.Id, dnsID)
+		r.client[dnsID] = cc
+		msg.Id = dnsID
+	default:
+		log.Errorf("Invalid protocol..")
+		return false
+	}
+
 	return true
 }
 
-func (r *resolver) concurrentQueryDec() bool {
+func (r *resolver) forwardQueryEnd(w dns.ResponseWriter, msg *dns.Msg) dns.ResponseWriter {
+	var (
+		cc clientConn
+		ok bool
+	)
+	proto := w.LocalAddr().Network()
+
 	r.queryLock.Lock()
 	defer r.queryLock.Unlock()
+
 	if r.count == 0 {
-		return false
+		log.Errorf("Invalid concurrent query count")
+	} else {
+		r.count--
 	}
-	r.count--
-	return true
+
+	switch proto {
+	case "tcp":
+		break
+	case "udp":
+		if cc, ok = r.client[msg.Id]; ok == false {
+			log.Debugf("Can't retrieve client context for dns id %v", msg.Id)
+			return nil
+		}
+		delete(r.client, msg.Id)
+		msg.Id = cc.dnsID
+		w = cc.respWriter
+	default:
+		log.Errorf("Invalid protocol")
+		return nil
+	}
+	return w
 }