vendor: update libnetwork 1a17fb36132631a95fe6bb055b91e24a516ad81d

full diff: ef149a924d...1a17fb3613

- docker/libnetwork#2538 produce an error with invalid address pool
    - addresses docker/docker#40388 dockerd ignores the --default-address-pool option
- docker/libnetwork#2471 DOCKER-USER chain not created when IPTableEnable=false
- docker/libnetwork#2544 Fix NPE due to null value returned by ep.Iface()
    - carries docker/libnetwork#2239 Prevent NPE in addServiceInfoToCluster()
    - addresses docker/docker#37506 Error initializing docker.server while starting daemon by systemd

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor.conf

@@ -39,7 +39,7 @@ github.com/gofrs/flock                              392e7fae8f1b0bdbd67dad7237d2
 # libnetwork
 
 # When updating, also update LIBNETWORK_COMMIT in hack/dockerfile/install/proxy.installer accordingly
-github.com/docker/libnetwork                        ef149a924dfde2e506ea3cb3f617d7d0fa96b8ee
+github.com/docker/libnetwork                        1a17fb36132631a95fe6bb055b91e24a516ad81d
 github.com/docker/go-events                         e31b211e4f1cd09aa76fe4ac244571fab96ae47f
 github.com/armon/go-radix                           e39d623f12e8e41c7b5529e9a9dd67a1e2261f80
 github.com/armon/go-metrics                         eb0af217e5e9747e41dd5303755356b62d28e3ec

vendor/github.com/docker/libnetwork/agent.go

@@ -596,7 +596,7 @@ func (ep *endpoint) deleteDriverInfoFromCluster() error {
 }
 
 func (ep *endpoint) addServiceInfoToCluster(sb *sandbox) error {
-	if ep.isAnonymous() && len(ep.myAliases) == 0 || ep.Iface().Address() == nil {
+	if ep.isAnonymous() && len(ep.myAliases) == 0 || ep.Iface() == nil || ep.Iface().Address() == nil {
 		return nil
 	}
 
@@ -719,7 +719,7 @@ func (ep *endpoint) deleteServiceInfoFromCluster(sb *sandbox, fullRemove bool, m
 		}
 	}
 
-	if ep.Iface().Address() != nil {
+	if ep.Iface() != nil && ep.Iface().Address() != nil {
 		if ep.svcID != "" {
 			// This is a task part of a service
 			var ingressPorts []*PortConfig

vendor/github.com/docker/libnetwork/controller.go

@@ -67,6 +67,7 @@ import (
 	"github.com/docker/libnetwork/hostdiscovery"
 	"github.com/docker/libnetwork/ipamapi"
 	"github.com/docker/libnetwork/netlabel"
+	"github.com/docker/libnetwork/options"
 	"github.com/docker/libnetwork/osl"
 	"github.com/docker/libnetwork/types"
 	"github.com/pkg/errors"
@@ -252,6 +253,7 @@ func New(cfgOptions ...config.Option) (NetworkController, error) {
 		return nil, err
 	}
 
+	setupArrangeUserFilterRule(c)
 	return c, nil
 }
 
@@ -909,8 +911,7 @@ addToStore:
 		arrangeIngressFilterRule()
 		c.Unlock()
 	}
-
-	c.arrangeUserFilterRule()
+	arrangeUserFilterRule()
 
 	return network, nil
 }
@@ -979,6 +980,10 @@ func (c *controller) reservePools() {
 			continue
 		}
 		for _, ep := range epl {
+			if ep.Iface() == nil {
+				logrus.Warnf("endpoint interface is empty for %q (%s)", ep.Name(), ep.ID())
+				continue
+			}
 			if err := ep.assignAddress(ipam, true, ep.Iface().AddressIPv6() != nil); err != nil {
 				logrus.Warnf("Failed to reserve current address for endpoint %q (%s) on network %q (%s)",
 					ep.Name(), ep.ID(), n.Name(), n.ID())
@@ -1363,3 +1368,27 @@ func (c *controller) IsDiagnosticEnabled() bool {
 	defer c.Unlock()
 	return c.DiagnosticServer.IsDiagnosticEnabled()
 }
+
+func (c *controller) iptablesEnabled() bool {
+	c.Lock()
+	defer c.Unlock()
+
+	if c.cfg == nil {
+		return false
+	}
+	// parse map cfg["bridge"]["generic"]["EnableIPTable"]
+	cfgBridge, ok := c.cfg.Daemon.DriverCfg["bridge"].(map[string]interface{})
+	if !ok {
+		return false
+	}
+	cfgGeneric, ok := cfgBridge[netlabel.GenericData].(options.Generic)
+	if !ok {
+		return false
+	}
+	enabled, ok := cfgGeneric["EnableIPTables"].(bool)
+	if !ok {
+		// unless user explicitly stated, assume iptable is enabled
+		enabled = true
+	}
+	return enabled
+}

vendor/github.com/docker/libnetwork/firewall_linux.go

@@ -7,21 +7,25 @@ import (
 
 const userChain = "DOCKER-USER"
 
-func (c *controller) arrangeUserFilterRule() {
-	c.Lock()
-	arrangeUserFilterRule()
-	c.Unlock()
-	iptables.OnReloaded(func() {
-		c.Lock()
-		arrangeUserFilterRule()
-		c.Unlock()
-	})
+var (
+	ctrl *controller = nil
+)
+
+func setupArrangeUserFilterRule(c *controller) {
+	ctrl = c
+	iptables.OnReloaded(arrangeUserFilterRule)
 }
 
 // This chain allow users to configure firewall policies in a way that persists
 // docker operations/restarts. Docker will not delete or modify any pre-existing
 // rules from the DOCKER-USER filter chain.
+// Note once DOCKER-USER chain is created, docker engine does not remove it when
+// IPTableForwarding is disabled, because it contains rules configured by user that
+// are beyond docker engine's control.
 func arrangeUserFilterRule() {
+	if ctrl == nil || !ctrl.iptablesEnabled() {
+		return
+	}
 	_, err := iptables.NewChain(userChain, iptables.Filter, false)
 	if err != nil {
 		logrus.Warnf("Failed to create %s chain: %v", userChain, err)

vendor/github.com/docker/libnetwork/firewall_others.go

@@ -2,5 +2,5 @@
 
 package libnetwork
 
-func (c *controller) arrangeUserFilterRule() {
-}
+func setupArrangeUserFilterRule(c *controller) {}
+func arrangeUserFilterRule()                   {}

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

@@ -35,7 +35,10 @@ func Init(ic ipamapi.Callback, l, g interface{}) error {
 		}
 	}
 
-	ipamutils.ConfigLocalScopeDefaultNetworks(GetDefaultIPAddressPool())
+	err := ipamutils.ConfigLocalScopeDefaultNetworks(GetDefaultIPAddressPool())
+	if err != nil {
+		return err
+	}
 
 	a, err := ipam.NewAllocator(localDs, globalDs)
 	if err != nil {

vendor/github.com/docker/libnetwork/network.go

@@ -1329,7 +1329,7 @@ func (n *network) EndpointByID(id string) (Endpoint, error) {
 func (n *network) updateSvcRecord(ep *endpoint, localEps []*endpoint, isAdd bool) {
 	var ipv6 net.IP
 	epName := ep.Name()
-	if iface := ep.Iface(); iface.Address() != nil {
+	if iface := ep.Iface(); iface != nil && iface.Address() != nil {
 		myAliases := ep.MyAliases()
 		if iface.AddressIPv6() != nil {
 			ipv6 = iface.AddressIPv6().IP