Merge pull request #37485 from fcrisciani/resolv

Systemd-resolved proper handling

daemon/config/config.go

@@ -75,6 +75,8 @@ type commonBridgeConfig struct {
 type NetworkConfig struct {
 	// Default address pools for docker networks
 	DefaultAddressPools opts.PoolsOpt `json:"default-address-pools,omitempty"`
+	// NetworkControlPlaneMTU allows to specify the control plane MTU, this will allow to optimize the network use in some components
+	NetworkControlPlaneMTU int `json:"network-control-plane-mtu,omitempty"`
 }
 
 // CommonTLSOptions defines TLS configuration for the daemon server.
@@ -192,8 +194,6 @@ type CommonConfig struct {
 	// Exposed node Generic Resources
 	// e.g: ["orange=red", "orange=green", "orange=blue", "apple=3"]
 	NodeGenericResources []string `json:"node-generic-resources,omitempty"`
-	// NetworkControlPlaneMTU allows to specify the control plane MTU, this will allow to optimize the network use in some components
-	NetworkControlPlaneMTU int `json:"network-control-plane-mtu,omitempty"`
 
 	// ContainerAddr is the address used to connect to containerd if we're
 	// not starting it ourselves

daemon/config/config_common_unix.go

@@ -69,3 +69,9 @@ func (conf *Config) GetInitPath() string {
 	}
 	return DefaultInitBinary
 }
+
+// GetResolvConf returns the appropriate resolv.conf
+// Check setupResolvConf on how this is selected
+func (conf *Config) GetResolvConf() string {
+	return conf.ResolvConf
+}

daemon/config/config_unix.go

@@ -37,6 +37,8 @@ type Config struct {
 	ShmSize              opts.MemBytes            `json:"default-shm-size,omitempty"`
 	NoNewPrivileges      bool                     `json:"no-new-privileges,omitempty"`
 	IpcMode              string                   `json:"default-ipc-mode,omitempty"`
+	// ResolvConf is the path to the configuration of the host resolver
+	ResolvConf string `json:"resolv-conf,omitempty"`
 }
 
 // BridgeConfig stores all the bridge driver specific

daemon/container_operations.go

@@ -63,21 +63,13 @@ func (daemon *Daemon) buildSandboxOptions(container *container.Container) ([]lib
 
 	if container.HostConfig.NetworkMode.IsHost() {
 		sboxOptions = append(sboxOptions, libnetwork.OptionUseDefaultSandbox())
-		if len(container.HostConfig.ExtraHosts) == 0 {
-			sboxOptions = append(sboxOptions, libnetwork.OptionOriginHostsPath("/etc/hosts"))
-		}
-		if len(container.HostConfig.DNS) == 0 && len(daemon.configStore.DNS) == 0 &&
-			len(container.HostConfig.DNSSearch) == 0 && len(daemon.configStore.DNSSearch) == 0 &&
-			len(container.HostConfig.DNSOptions) == 0 && len(daemon.configStore.DNSOptions) == 0 {
-			sboxOptions = append(sboxOptions, libnetwork.OptionOriginResolvConfPath("/etc/resolv.conf"))
-		}
 	} else {
 		// OptionUseExternalKey is mandatory for userns support.
 		// But optional for non-userns support
 		sboxOptions = append(sboxOptions, libnetwork.OptionUseExternalKey())
 	}
 
-	if err = setupPathsAndSandboxOptions(container, &sboxOptions); err != nil {
+	if err = daemon.setupPathsAndSandboxOptions(container, &sboxOptions); err != nil {
 		return nil, err
 	}
 

daemon/container_operations_unix.go

@@ -369,9 +369,17 @@ func (daemon *Daemon) isNetworkHotPluggable() bool {
 	return true
 }
 
-func setupPathsAndSandboxOptions(container *container.Container, sboxOptions *[]libnetwork.SandboxOption) error {
+func (daemon *Daemon) setupPathsAndSandboxOptions(container *container.Container, sboxOptions *[]libnetwork.SandboxOption) error {
 	var err error
 
+	if container.HostConfig.NetworkMode.IsHost() {
+		// Point to the host files, so that will be copied into the container running in host mode
+		*sboxOptions = append(*sboxOptions, libnetwork.OptionOriginHostsPath("/etc/hosts"))
+		*sboxOptions = append(*sboxOptions, libnetwork.OptionOriginResolvConfPath("/etc/resolv.conf"))
+	} else {
+		*sboxOptions = append(*sboxOptions, libnetwork.OptionOriginResolvConfPath(daemon.configStore.GetResolvConf()))
+	}
+
 	container.HostsPath, err = container.GetRootResourcePath("hosts")
 	if err != nil {
 		return err

daemon/container_operations_windows.go

@@ -155,7 +155,7 @@ func (daemon *Daemon) isNetworkHotPluggable() bool {
 	return true
 }
 
-func setupPathsAndSandboxOptions(container *container.Container, sboxOptions *[]libnetwork.SandboxOption) error {
+func (daemon *Daemon) setupPathsAndSandboxOptions(container *container.Container, sboxOptions *[]libnetwork.SandboxOption) error {
 	return nil
 }
 

daemon/daemon.go

@@ -581,6 +581,9 @@ func NewDaemon(config *config.Config, registryService registry.Service, containe
 	// Do we have a disabled network?
 	config.DisableBridge = isBridgeNetworkDisabled(config)
 
+	// Setup the resolv.conf
+	setupResolvConf(config)
+
 	// Verify the platform is supported as a daemon
 	if !platformSupported {
 		return nil, errSystemNotSupported

daemon/daemon_linux.go

@@ -8,12 +8,19 @@ import (
 	"regexp"
 	"strings"
 
+	"github.com/docker/docker/daemon/config"
+	"github.com/docker/docker/internal/procfs"
 	"github.com/docker/docker/pkg/fileutils"
 	"github.com/docker/docker/pkg/mount"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
 
+const (
+	defaultResolvConf   = "/etc/resolv.conf"
+	alternateResolvConf = "/run/systemd/resolve/resolv.conf"
+)
+
 // On Linux, plugins use a static path for storing execution state,
 // instead of deriving path from daemon's exec-root. This is because
 // plugin socket files are created here and they cannot exceed max
@@ -131,3 +138,30 @@ func shouldUnmountRoot(root string, info *mount.Info) bool {
 	}
 	return hasMountinfoOption(info.Optional, sharedPropagationOption)
 }
+
+// setupResolvConf sets the appropriate resolv.conf file if not specified
+// When systemd-resolved is running the default /etc/resolv.conf points to
+// localhost. In this case fetch the alternative config file that is in a
+// different path so that containers can use it
+// In all the other cases fallback to the default one
+func setupResolvConf(config *config.Config) {
+	if config.ResolvConf != "" {
+		return
+	}
+
+	config.ResolvConf = defaultResolvConf
+	pids, err := procfs.PidOf("systemd-resolved")
+	if err != nil {
+		logrus.Errorf("unable to check systemd-resolved status: %s", err)
+		return
+	}
+	if len(pids) > 0 && pids[0] > 0 {
+		_, err := os.Stat(alternateResolvConf)
+		if err == nil {
+			logrus.Infof("systemd-resolved is running, so using resolvconf: %s", alternateResolvConf)
+			config.ResolvConf = alternateResolvConf
+			return
+		}
+		logrus.Infof("systemd-resolved is running, but %s is not present, fallback to %s", alternateResolvConf, defaultResolvConf)
+	}
+}

daemon/daemon_unsupported.go

@@ -1,5 +1,9 @@
 // +build !linux,!freebsd,!windows
 
 package daemon // import "github.com/docker/docker/daemon"
+import "github.com/docker/docker/daemon/config"
 
 const platformSupported = false
+
+func setupResolvConf(config *config.Config) {
+}

daemon/daemon_windows.go

@@ -653,3 +653,6 @@ func (daemon *Daemon) loadRuntimes() error {
 func (daemon *Daemon) initRuntimes(_ map[string]types.Runtime) error {
 	return nil
 }
+
+func setupResolvConf(config *config.Config) {
+}

hack/dockerfile/install/proxy.installer

@@ -3,7 +3,7 @@
 # LIBNETWORK_COMMIT is used to build the docker-userland-proxy binary. When
 # updating the binary version, consider updating github.com/docker/libnetwork
 # in vendor.conf accordingly
-LIBNETWORK_COMMIT=3ac297bc7fd0afec9051bbb47024c9bc1d75bf5b
+LIBNETWORK_COMMIT=f30a35b091cc2a431ef9856c75c343f75bb5f2e2
 
 install_proxy() {
 	case "$1" in

internal/procfs/procfs_linux.go

@@ -0,0 +1,105 @@
+package procfs
+
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode"
+
+	"github.com/sirupsen/logrus"
+)
+
+// PidOf finds process(es) with a specified name (regexp match)
+// and return their pid(s)
+func PidOf(name string) ([]int, error) {
+	if len(name) == 0 {
+		return []int{}, fmt.Errorf("name should not be empty")
+	}
+	re, err := regexp.Compile("(^|/)" + name + "$")
+	if err != nil {
+		return []int{}, err
+	}
+	return getPids(re), nil
+}
+
+func getPids(re *regexp.Regexp) []int {
+	pids := []int{}
+
+	dirFD, err := os.Open("/proc")
+	if err != nil {
+		return nil
+	}
+	defer dirFD.Close()
+
+	for {
+		// Read a small number at a time in case there are many entries, we don't want to
+		// allocate a lot here.
+		ls, err := dirFD.Readdir(10)
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return nil
+		}
+
+		for _, entry := range ls {
+			if !entry.IsDir() {
+				continue
+			}
+
+			// If the directory is not a number (i.e. not a PID), skip it
+			pid, err := strconv.Atoi(entry.Name())
+			if err != nil {
+				continue
+			}
+
+			cmdline, err := ioutil.ReadFile(filepath.Join("/proc", entry.Name(), "cmdline"))
+			if err != nil {
+				logrus.Infof("Error reading file %s: %+v", filepath.Join("/proc", entry.Name(), "cmdline"), err)
+				continue
+			}
+
+			// The bytes we read have '\0' as a separator for the command line
+			parts := bytes.SplitN(cmdline, []byte{0}, 2)
+			if len(parts) == 0 {
+				continue
+			}
+			// Split the command line itself we are interested in just the first part
+			exe := strings.FieldsFunc(string(parts[0]), func(c rune) bool {
+				return unicode.IsSpace(c) || c == ':'
+			})
+			if len(exe) == 0 {
+				continue
+			}
+			// Check if the name of the executable is what we are looking for
+			if re.MatchString(exe[0]) {
+				// Grab the PID from the directory path
+				pids = append(pids, pid)
+			}
+		}
+	}
+
+	return pids
+}

internal/procfs/procfs_linux_test.go

@@ -0,0 +1,36 @@
+package procfs
+
+import (
+	"os"
+	"path/filepath"
+	"regexp"
+	"runtime"
+	"testing"
+
+	"gotest.tools/assert"
+)
+
+func TestPidOf(t *testing.T) {
+	pids, err := PidOf(filepath.Base(os.Args[0]))
+	assert.NilError(t, err)
+	assert.Check(t, len(pids) == 1)
+	assert.DeepEqual(t, pids[0], os.Getpid())
+}
+
+func BenchmarkGetPids(b *testing.B) {
+	if runtime.GOOS == "darwin" || runtime.GOOS == "windows" {
+		b.Skipf("not supported on GOOS=%s", runtime.GOOS)
+	}
+
+	re, err := regexp.Compile("(^|/)" + filepath.Base(os.Args[0]) + "$")
+	assert.Check(b, err == nil)
+
+	for i := 0; i < b.N; i++ {
+		pids := getPids(re)
+
+		b.StopTimer()
+		assert.Check(b, len(pids) > 0)
+		assert.Check(b, pids[0] == os.Getpid())
+		b.StartTimer()
+	}
+}

vendor.conf

@@ -37,7 +37,7 @@ github.com/mitchellh/hashstructure 2bca23e0e452137f789efbc8610126fd8b94f73b
 #get libnetwork packages
 
 # When updating, also update LIBNETWORK_COMMIT in hack/dockerfile/install/proxy accordingly
-github.com/docker/libnetwork d00ceed44cc447c77f25cdf5d59e83163bdcb4c9
+github.com/docker/libnetwork f30a35b091cc2a431ef9856c75c343f75bb5f2e2
 github.com/docker/go-events 9461782956ad83b30282bf90e31fa6a70c255ba9
 github.com/armon/go-radix e39d623f12e8e41c7b5529e9a9dd67a1e2261f80
 github.com/armon/go-metrics eb0af217e5e9747e41dd5303755356b62d28e3ec

vendor/github.com/docker/libnetwork/README.md

@@ -15,6 +15,17 @@ There are many networking solutions available to suit a broad range of use-cases
 
 
 ```go
+import (
+	"fmt"
+	"log"
+
+	"github.com/docker/docker/pkg/reexec"
+	"github.com/docker/libnetwork"
+	"github.com/docker/libnetwork/config"
+	"github.com/docker/libnetwork/netlabel"
+	"github.com/docker/libnetwork/options"
+)
+
 func main() {
 	if reexec.Init() {
 		return

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

@@ -194,7 +194,7 @@ func (c *controller) handleKeyChange(keys []*types.EncryptionKey) error {
 func (c *controller) agentSetup(clusterProvider cluster.Provider) error {
 	agent := c.getAgent()
 
-	// If the agent is already present there is no need to try to initilize it again
+	// If the agent is already present there is no need to try to initialize it again
 	if agent != nil {
 		return nil
 	}

vendor/github.com/docker/libnetwork/bitseq/sequence.go

@@ -372,7 +372,7 @@ func (h *Handle) set(ordinal, start, end uint64, any bool, release bool, serial
 			h.Lock()
 		}
 
-		// Previous atomic push was succesfull. Save private copy to local copy
+		// Previous atomic push was successful. Save private copy to local copy
 		h.unselected = nh.unselected
 		h.head = nh.head
 		h.dbExists = nh.dbExists

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

@@ -121,7 +121,7 @@ type NetworkController interface {
 	// Stop network controller
 	Stop()
 
-	// ReloadCondfiguration updates the controller configuration
+	// ReloadConfiguration updates the controller configuration
 	ReloadConfiguration(cfgOptions ...config.Option) error
 
 	// SetClusterProvider sets cluster provider
@@ -1107,6 +1107,8 @@ func (c *controller) NewSandbox(containerID string, options ...SandboxOption) (S
 		sb.config.hostsPath = filepath.Join(c.cfg.Daemon.DataDir, "/network/files/hosts")
 		sb.config.resolvConfPath = filepath.Join(c.cfg.Daemon.DataDir, "/network/files/resolv.conf")
 		sb.id = "ingress_sbox"
+	} else if sb.loadBalancerNID != "" {
+		sb.id = "lb_" + sb.loadBalancerNID
 	}
 	c.Unlock()
 

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

@@ -185,7 +185,7 @@ func Key(key ...string) string {
 func ParseKey(key string) ([]string, error) {
 	chain := strings.Split(strings.Trim(key, "/"), "/")
 
-	// The key must atleast be equal to the rootChain in order to be considered as valid
+	// The key must at least be equal to the rootChain in order to be considered as valid
 	if len(chain) <= len(rootChain) || !reflect.DeepEqual(chain[0:len(rootChain)], rootChain) {
 		return nil, types.BadRequestErrorf("invalid Key : %s", key)
 	}
@@ -589,7 +589,7 @@ func (ds *datastore) DeleteObject(kvObject KVObject) error {
 		defer ds.Unlock()
 	}
 
-	// cleaup the cache first
+	// cleanup the cache first
 	if ds.cache != nil {
 		// If persistent store is skipped, sequencing needs to
 		// happen in cache.
@@ -645,7 +645,7 @@ func (ds *datastore) DeleteTree(kvObject KVObject) error {
 		defer ds.Unlock()
 	}
 
-	// cleaup the cache first
+	// cleanup the cache first
 	if ds.cache != nil {
 		// If persistent store is skipped, sequencing needs to
 		// happen in cache.

vendor/github.com/docker/libnetwork/datastore/mock_store.go

@@ -8,8 +8,8 @@ import (
 )
 
 var (
-	// ErrNotImplmented exported
-	ErrNotImplmented = errors.New("Functionality not implemented")
+	// ErrNotImplemented exported
+	ErrNotImplemented = errors.New("Functionality not implemented")
 )
 
 // MockData exported
@@ -65,7 +65,7 @@ func (s *MockStore) Exists(key string) (bool, error) {
 
 // List gets a range of values at "directory"
 func (s *MockStore) List(prefix string) ([]*store.KVPair, error) {
-	return nil, ErrNotImplmented
+	return nil, ErrNotImplemented
 }
 
 // DeleteTree deletes a range of values at "directory"
@@ -76,17 +76,17 @@ func (s *MockStore) DeleteTree(prefix string) error {
 
 // Watch a single key for modifications
 func (s *MockStore) Watch(key string, stopCh <-chan struct{}) (<-chan *store.KVPair, error) {
-	return nil, ErrNotImplmented
+	return nil, ErrNotImplemented
 }
 
 // WatchTree triggers a watch on a range of values at "directory"
 func (s *MockStore) WatchTree(prefix string, stopCh <-chan struct{}) (<-chan []*store.KVPair, error) {
-	return nil, ErrNotImplmented
+	return nil, ErrNotImplemented
 }
 
 // NewLock exposed
 func (s *MockStore) NewLock(key string, options *store.LockOptions) (store.Locker, error) {
-	return nil, ErrNotImplmented
+	return nil, ErrNotImplemented
 }
 
 // AtomicPut put a value at "key" if the key has not been

vendor/github.com/docker/libnetwork/diagnostic/server.go

@@ -9,7 +9,7 @@ import (
 	"sync/atomic"
 
 	stackdump "github.com/docker/docker/pkg/signal"
-	"github.com/docker/libnetwork/common"
+	"github.com/docker/libnetwork/internal/caller"
 	"github.com/sirupsen/logrus"
 )
 
@@ -127,7 +127,7 @@ func notImplemented(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	rsp := WrongCommand("not implemented", fmt.Sprintf("URL path: %s no method implemented check /help\n", r.URL.Path))
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("command not implemented done")
 
 	HTTPReply(w, rsp, json)
@@ -138,7 +138,7 @@ func help(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("help done")
 
 	n, ok := ctx.(*Server)
@@ -156,7 +156,7 @@ func ready(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("ready done")
 	HTTPReply(w, CommandSucceed(&StringCmd{Info: "OK"}), json)
 }
@@ -166,7 +166,7 @@ func stackTrace(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("stack trace")
 
 	path, err := stackdump.DumpStacks("/tmp/")

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

@@ -75,10 +75,10 @@ type Driver interface {
 	// DecodeTableEntry passes the driver a key, value pair from table it registered
 	// with libnetwork. Driver should return {object ID, map[string]string} tuple.
 	// If DecodeTableEntry is called for a table associated with NetworkObject or
-	// EndpointObject the return object ID should be the network id or endppoint id
+	// EndpointObject the return object ID should be the network id or endpoint id
 	// associated with that entry. map should have information about the object that
 	// can be presented to the user.
-	// For exampe: overlay driver returns the VTEP IP of the host that has the endpoint
+	// For example: overlay driver returns the VTEP IP of the host that has the endpoint
 	// which is shown in 'network inspect --verbose'
 	DecodeTableEntry(tablename string, key string, value []byte) (string, map[string]string)
 
@@ -97,7 +97,7 @@ type NetworkInfo interface {
 	TableEventRegister(tableName string, objType ObjectType) error
 }
 
-// InterfaceInfo provides a go interface for drivers to retrive
+// InterfaceInfo provides a go interface for drivers to retrieve
 // network information to interface resources.
 type InterfaceInfo interface {
 	// SetMacAddress allows the driver to set the mac address to the endpoint interface

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

@@ -104,7 +104,7 @@ type containerConfiguration struct {
 	ChildEndpoints  []string
 }
 
-// cnnectivityConfiguration represents the user specified configuration regarding the external connectivity
+// connectivityConfiguration represents the user specified configuration regarding the external connectivity
 type connectivityConfiguration struct {
 	PortBindings []types.PortBinding
 	ExposedPorts []types.TransportPort

vendor/github.com/docker/libnetwork/drivers/ipvlan/ipvlan_joinleave.go

@@ -84,7 +84,7 @@ func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo,
 			}
 			v4gw, _, err := net.ParseCIDR(s.GwIP)
 			if err != nil {
-				return fmt.Errorf("gatway %s is not a valid ipv4 address: %v", s.GwIP, err)
+				return fmt.Errorf("gateway %s is not a valid ipv4 address: %v", s.GwIP, err)
 			}
 			err = jinfo.SetGateway(v4gw)
 			if err != nil {
@@ -101,7 +101,7 @@ func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo,
 			}
 			v6gw, _, err := net.ParseCIDR(s.GwIP)
 			if err != nil {
-				return fmt.Errorf("gatway %s is not a valid ipv6 address: %v", s.GwIP, err)
+				return fmt.Errorf("gateway %s is not a valid ipv6 address: %v", s.GwIP, err)
 			}
 			err = jinfo.SetGatewayIPv6(v6gw)
 			if err != nil {

vendor/github.com/docker/libnetwork/drivers/ipvlan/ipvlan_network.go

@@ -68,7 +68,7 @@ func (d *driver) CreateNetwork(nid string, option map[string]interface{}, nInfo
 	err = d.storeUpdate(config)
 	if err != nil {
 		d.deleteNetwork(config.ID)
-		logrus.Debugf("encoutered an error rolling back a network create for %s : %v", config.ID, err)
+		logrus.Debugf("encountered an error rolling back a network create for %s : %v", config.ID, err)
 		return err
 	}
 
@@ -92,7 +92,7 @@ func (d *driver) createNetwork(config *configuration) error {
 				return err
 			}
 			config.CreatedSlaveLink = true
-			// notify the user in logs they have limited comunicatins
+			// notify the user in logs they have limited communications
 			if config.Parent == getDummyName(stringid.TruncateID(config.ID)) {
 				logrus.Debugf("Empty -o parent= and --internal flags limit communications to other containers inside of network: %s",
 					config.Parent)

vendor/github.com/docker/libnetwork/drivers/ipvlan/ipvlan_setup.go

@@ -30,7 +30,7 @@ func createIPVlan(containerIfName, parent, ipvlanMode string) (string, error) {
 	// Get the link for the master index (Example: the docker host eth iface)
 	parentLink, err := ns.NlHandle().LinkByName(parent)
 	if err != nil {
-		return "", fmt.Errorf("error occoured looking up the %s parent iface %s error: %s", ipvlanType, parent, err)
+		return "", fmt.Errorf("error occurred looking up the %s parent iface %s error: %s", ipvlanType, parent, err)
 	}
 	// Create an ipvlan link
 	ipvlan := &netlink.IPVlan{
@@ -169,7 +169,7 @@ func createDummyLink(dummyName, truncNetID string) error {
 	}
 	parentDummyLink, err := ns.NlHandle().LinkByName(dummyName)
 	if err != nil {
-		return fmt.Errorf("error occoured looking up the %s parent iface %s error: %s", ipvlanType, dummyName, err)
+		return fmt.Errorf("error occurred looking up the %s parent iface %s error: %s", ipvlanType, dummyName, err)
 	}
 	// bring the new netlink iface up
 	if err := ns.NlHandle().LinkSetUp(parentDummyLink); err != nil {

vendor/github.com/docker/libnetwork/drivers/ipvlan/ipvlan_state.go

@@ -31,7 +31,7 @@ func (d *driver) deleteNetwork(nid string) {
 	d.Unlock()
 }
 
-// getNetworks Safely returns a slice of existng networks
+// getNetworks Safely returns a slice of existing networks
 func (d *driver) getNetworks() []*network {
 	d.Lock()
 	defer d.Unlock()

vendor/github.com/docker/libnetwork/drivers/macvlan/macvlan_joinleave.go

@@ -46,7 +46,7 @@ func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo,
 		}
 		v4gw, _, err := net.ParseCIDR(s.GwIP)
 		if err != nil {
-			return fmt.Errorf("gatway %s is not a valid ipv4 address: %v", s.GwIP, err)
+			return fmt.Errorf("gateway %s is not a valid ipv4 address: %v", s.GwIP, err)
 		}
 		err = jinfo.SetGateway(v4gw)
 		if err != nil {
@@ -63,7 +63,7 @@ func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo,
 		}
 		v6gw, _, err := net.ParseCIDR(s.GwIP)
 		if err != nil {
-			return fmt.Errorf("gatway %s is not a valid ipv6 address: %v", s.GwIP, err)
+			return fmt.Errorf("gateway %s is not a valid ipv6 address: %v", s.GwIP, err)
 		}
 		err = jinfo.SetGatewayIPv6(v6gw)
 		if err != nil {

vendor/github.com/docker/libnetwork/drivers/macvlan/macvlan_network.go

@@ -72,7 +72,7 @@ func (d *driver) CreateNetwork(nid string, option map[string]interface{}, nInfo
 	err = d.storeUpdate(config)
 	if err != nil {
 		d.deleteNetwork(config.ID)
-		logrus.Debugf("encoutered an error rolling back a network create for %s : %v", config.ID, err)
+		logrus.Debugf("encountered an error rolling back a network create for %s : %v", config.ID, err)
 		return err
 	}
 
@@ -96,7 +96,7 @@ func (d *driver) createNetwork(config *configuration) error {
 				return err
 			}
 			config.CreatedSlaveLink = true
-			// notify the user in logs they have limited comunicatins
+			// notify the user in logs they have limited communications
 			if config.Parent == getDummyName(stringid.TruncateID(config.ID)) {
 				logrus.Debugf("Empty -o parent= and --internal flags limit communications to other containers inside of network: %s",
 					config.Parent)

vendor/github.com/docker/libnetwork/drivers/macvlan/macvlan_setup.go

@@ -30,7 +30,7 @@ func createMacVlan(containerIfName, parent, macvlanMode string) (string, error)
 	// Get the link for the master index (Example: the docker host eth iface)
 	parentLink, err := ns.NlHandle().LinkByName(parent)
 	if err != nil {
-		return "", fmt.Errorf("error occoured looking up the %s parent iface %s error: %s", macvlanType, parent, err)
+		return "", fmt.Errorf("error occurred looking up the %s parent iface %s error: %s", macvlanType, parent, err)
 	}
 	// Create a macvlan link
 	macvlan := &netlink.Macvlan{
@@ -173,7 +173,7 @@ func createDummyLink(dummyName, truncNetID string) error {
 	}
 	parentDummyLink, err := ns.NlHandle().LinkByName(dummyName)
 	if err != nil {
-		return fmt.Errorf("error occoured looking up the %s parent iface %s error: %s", macvlanType, dummyName, err)
+		return fmt.Errorf("error occurred looking up the %s parent iface %s error: %s", macvlanType, dummyName, err)
 	}
 	// bring the new netlink iface up
 	if err := ns.NlHandle().LinkSetUp(parentDummyLink); err != nil {

vendor/github.com/docker/libnetwork/drivers/overlay/encryption.go

@@ -601,7 +601,7 @@ func (n *network) maxMTU() int {
 	mtu -= vxlanEncap
 	if n.secure {
 		// In case of encryption account for the
-		// esp packet espansion and padding
+		// esp packet expansion and padding
 		mtu -= pktExpansion
 		mtu -= (mtu % 4)
 	}

vendor/github.com/docker/libnetwork/drivers/overlay/joinleave.go

@@ -47,18 +47,10 @@ func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo,
 		return fmt.Errorf("couldn't get vxlan id for %q: %v", s.subnetIP.String(), err)
 	}
 
-	if err := n.joinSandbox(false); err != nil {
+	if err := n.joinSandbox(s, false, true); err != nil {
 		return fmt.Errorf("network sandbox join failed: %v", err)
 	}
 
-	if err := n.joinSubnetSandbox(s, false); err != nil {
-		return fmt.Errorf("subnet sandbox join failed for %q: %v", s.subnetIP.String(), err)
-	}
-
-	// joinSubnetSandbox gets called when an endpoint comes up on a new subnet in the
-	// overlay network. Hence the Endpoint count should be updated outside joinSubnetSandbox
-	n.incEndpointCount()
-
 	sbox := n.sandbox()
 
 	overlayIfName, containerIfName, err := createVethPair()

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

@@ -39,7 +39,7 @@ var (
 type networkTable map[string]*network
 
 type subnet struct {
-	once      *sync.Once
+	sboxInit  bool
 	vxlanName string
 	brName    string
 	vni       uint32
@@ -63,7 +63,7 @@ type network struct {
 	endpoints endpointTable
 	driver    *driver
 	joinCnt   int
-	once      *sync.Once
+	sboxInit  bool
 	initEpoch int
 	initErr   error
 	subnets   []*subnet
@@ -150,7 +150,6 @@ func (d *driver) CreateNetwork(id string, option map[string]interface{}, nInfo d
 		id:        id,
 		driver:    d,
 		endpoints: endpointTable{},
-		once:      &sync.Once{},
 		subnets:   []*subnet{},
 	}
 
@@ -193,7 +192,6 @@ func (d *driver) CreateNetwork(id string, option map[string]interface{}, nInfo d
 		s := &subnet{
 			subnetIP: ipd.Pool,
 			gwIP:     ipd.Gateway,
-			once:     &sync.Once{},
 		}
 
 		if len(vnis) != 0 {
@@ -277,7 +275,7 @@ func (d *driver) DeleteNetwork(nid string) error {
 			logrus.Warnf("Failed to delete overlay endpoint %.7s from local store: %v", ep.id, err)
 		}
 	}
-	// flush the peerDB entries
+
 	doPeerFlush = true
 	delete(d.networks, nid)
 
@@ -304,29 +302,54 @@ func (d *driver) RevokeExternalConnectivity(nid, eid string) error {
 	return nil
 }
 
-func (n *network) incEndpointCount() {
-	n.Lock()
-	defer n.Unlock()
-	n.joinCnt++
-}
-
-func (n *network) joinSandbox(restore bool) error {
+func (n *network) joinSandbox(s *subnet, restore bool, incJoinCount bool) error {
 	// If there is a race between two go routines here only one will win
 	// the other will wait.
-	n.once.Do(func() {
-		// save the error status of initSandbox in n.initErr so that
-		// all the racing go routines are able to know the status.
+	networkOnce.Do(networkOnceInit)
+
+	n.Lock()
+	// If non-restore initialization occurred and was successful then
+	// tell the peerDB to initialize the sandbox with all the peers
+	// previously received from networkdb.  But only do this after
+	// unlocking the network.  Otherwise we could deadlock with
+	// on the peerDB channel while peerDB is waiting for the network lock.
+	var doInitPeerDB bool
+	defer func() {
+		n.Unlock()
+		if doInitPeerDB {
+			n.driver.initSandboxPeerDB(n.id)
+		}
+	}()
+
+	if !n.sboxInit {
 		n.initErr = n.initSandbox(restore)
-	})
+		doInitPeerDB = n.initErr == nil && !restore
+		// If there was an error, we cannot recover it
+		n.sboxInit = true
+	}
 
-	return n.initErr
-}
+	if n.initErr != nil {
+		return fmt.Errorf("network sandbox join failed: %v", n.initErr)
+	}
 
-func (n *network) joinSubnetSandbox(s *subnet, restore bool) error {
-	s.once.Do(func() {
-		s.initErr = n.initSubnetSandbox(s, restore)
-	})
-	return s.initErr
+	subnetErr := s.initErr
+	if !s.sboxInit {
+		subnetErr = n.initSubnetSandbox(s, restore)
+		// We can recover from these errors, but not on restore
+		if restore || subnetErr == nil {
+			s.initErr = subnetErr
+			s.sboxInit = true
+		}
+	}
+	if subnetErr != nil {
+		return fmt.Errorf("subnet sandbox join failed for %q: %v", s.subnetIP.String(), subnetErr)
+	}
+
+	if incJoinCount {
+		n.joinCnt++
+	}
+
+	return nil
 }
 
 func (n *network) leaveSandbox() {
@@ -337,15 +360,14 @@ func (n *network) leaveSandbox() {
 		return
 	}
 
-	// We are about to destroy sandbox since the container is leaving the network
-	// Reinitialize the once variable so that we will be able to trigger one time
-	// sandbox initialization(again) when another container joins subsequently.
-	n.once = &sync.Once{}
-	for _, s := range n.subnets {
-		s.once = &sync.Once{}
-	}
-
 	n.destroySandbox()
+
+	n.sboxInit = false
+	n.initErr = nil
+	for _, s := range n.subnets {
+		s.sboxInit = false
+		s.initErr = nil
+	}
 }
 
 // to be called while holding network lock
@@ -478,7 +500,7 @@ func (n *network) generateVxlanName(s *subnet) string {
 		id = n.id[:5]
 	}
 
-	return "vx-" + fmt.Sprintf("%06x", n.vxlanID(s)) + "-" + id
+	return fmt.Sprintf("vx-%06x-%v", s.vni, id)
 }
 
 func (n *network) generateBridgeName(s *subnet) string {
@@ -491,7 +513,7 @@ func (n *network) generateBridgeName(s *subnet) string {
 }
 
 func (n *network) getBridgeNamePrefix(s *subnet) string {
-	return "ov-" + fmt.Sprintf("%06x", n.vxlanID(s))
+	return fmt.Sprintf("ov-%06x", s.vni)
 }
 
 func checkOverlap(nw *net.IPNet) error {
@@ -513,7 +535,7 @@ func checkOverlap(nw *net.IPNet) error {
 }
 
 func (n *network) restoreSubnetSandbox(s *subnet, brName, vxlanName string) error {
-	sbox := n.sandbox()
+	sbox := n.sbox
 
 	// restore overlay osl sandbox
 	Ifaces := make(map[string][]osl.IfaceOption)
@@ -542,7 +564,7 @@ func (n *network) setupSubnetSandbox(s *subnet, brName, vxlanName string) error
 			deleteInterfaceBySubnet(n.getBridgeNamePrefix(s), s)
 		}
 		// Try to delete the vxlan interface by vni if already present
-		deleteVxlanByVNI("", n.vxlanID(s))
+		deleteVxlanByVNI("", s.vni)
 
 		if err := checkOverlap(s.subnetIP); err != nil {
 			return err
@@ -556,24 +578,24 @@ func (n *network) setupSubnetSandbox(s *subnet, brName, vxlanName string) error
 		// it must a stale namespace from previous
 		// life. Destroy it completely and reclaim resourced.
 		networkMu.Lock()
-		path, ok := vniTbl[n.vxlanID(s)]
+		path, ok := vniTbl[s.vni]
 		networkMu.Unlock()
 
 		if ok {
-			deleteVxlanByVNI(path, n.vxlanID(s))
+			deleteVxlanByVNI(path, s.vni)
 			if err := syscall.Unmount(path, syscall.MNT_FORCE); err != nil {
 				logrus.Errorf("unmount of %s failed: %v", path, err)
 			}
 			os.Remove(path)
 
 			networkMu.Lock()
-			delete(vniTbl, n.vxlanID(s))
+			delete(vniTbl, s.vni)
 			networkMu.Unlock()
 		}
 	}
 
 	// create a bridge and vxlan device for this subnet and move it to the sandbox
-	sbox := n.sandbox()
+	sbox := n.sbox
 
 	if err := sbox.AddInterface(brName, "br",
 		sbox.InterfaceOptions().Address(s.gwIP),
@@ -581,13 +603,30 @@ func (n *network) setupSubnetSandbox(s *subnet, brName, vxlanName string) error
 		return fmt.Errorf("bridge creation in sandbox failed for subnet %q: %v", s.subnetIP.String(), err)
 	}
 
-	err := createVxlan(vxlanName, n.vxlanID(s), n.maxMTU())
+	err := createVxlan(vxlanName, s.vni, n.maxMTU())
 	if err != nil {
 		return err
 	}
 
 	if err := sbox.AddInterface(vxlanName, "vxlan",
 		sbox.InterfaceOptions().Master(brName)); err != nil {
+		// If adding vxlan device to the overlay namespace fails, remove the bridge interface we
+		// already added to the namespace. This allows the caller to try the setup again.
+		for _, iface := range sbox.Info().Interfaces() {
+			if iface.SrcName() == brName {
+				if ierr := iface.Remove(); ierr != nil {
+					logrus.Errorf("removing bridge failed from ov ns %v failed, %v", n.sbox.Key(), ierr)
+				}
+			}
+		}
+
+		// Also, delete the vxlan interface. Since a global vni id is associated
+		// with the vxlan interface, an orphaned vxlan interface will result in
+		// failure of vxlan device creation if the vni is assigned to some other
+		// network.
+		if deleteErr := deleteInterface(vxlanName); deleteErr != nil {
+			logrus.Warnf("could not delete vxlan interface, %s, error %v, after config error, %v", vxlanName, deleteErr, err)
+		}
 		return fmt.Errorf("vxlan interface creation failed for subnet %q: %v", s.subnetIP.String(), err)
 	}
 
@@ -619,6 +658,7 @@ func (n *network) setupSubnetSandbox(s *subnet, brName, vxlanName string) error
 	return nil
 }
 
+// Must be called with the network lock
 func (n *network) initSubnetSandbox(s *subnet, restore bool) error {
 	brName := n.generateBridgeName(s)
 	vxlanName := n.generateVxlanName(s)
@@ -633,10 +673,8 @@ func (n *network) initSubnetSandbox(s *subnet, restore bool) error {
 		}
 	}
 
-	n.Lock()
 	s.vxlanName = vxlanName
 	s.brName = brName
-	n.Unlock()
 
 	return nil
 }
@@ -677,11 +715,7 @@ func (n *network) cleanupStaleSandboxes() {
 }
 
 func (n *network) initSandbox(restore bool) error {
-	n.Lock()
 	n.initEpoch++
-	n.Unlock()
-
-	networkOnce.Do(networkOnceInit)
 
 	if !restore {
 		if hostMode {
@@ -711,12 +745,7 @@ func (n *network) initSandbox(restore bool) error {
 	}
 
 	// this is needed to let the peerAdd configure the sandbox
-	n.setSandbox(sbox)
-
-	if !restore {
-		// Initialize the sandbox with all the peers previously received from networkdb
-		n.driver.initSandboxPeerDB(n.id)
-	}
+	n.sbox = sbox
 
 	// If we are in swarm mode, we don't need anymore the watchMiss routine.
 	// This will save 1 thread and 1 netlink socket per network
@@ -734,7 +763,7 @@ func (n *network) initSandbox(restore bool) error {
 		tv := syscall.NsecToTimeval(soTimeout.Nanoseconds())
 		err = nlSock.SetReceiveTimeout(&tv)
 	})
-	n.setNetlinkSocket(nlSock)
+	n.nlSocket = nlSock
 
 	if err == nil {
 		go n.watchMiss(nlSock, key)
@@ -836,7 +865,6 @@ func (d *driver) restoreNetworkFromStore(nid string) *network {
 	if n != nil {
 		n.driver = d
 		n.endpoints = endpointTable{}
-		n.once = &sync.Once{}
 		d.networks[nid] = n
 	}
 	return n
@@ -844,11 +872,11 @@ func (d *driver) restoreNetworkFromStore(nid string) *network {
 
 func (d *driver) network(nid string) *network {
 	d.Lock()
-	defer d.Unlock()
 	n, ok := d.networks[nid]
 	if !ok {
 		n = d.restoreNetworkFromStore(nid)
 	}
+	d.Unlock()
 
 	return n
 }
@@ -869,26 +897,12 @@ func (d *driver) getNetworkFromStore(nid string) *network {
 func (n *network) sandbox() osl.Sandbox {
 	n.Lock()
 	defer n.Unlock()
-
 	return n.sbox
 }
 
-func (n *network) setSandbox(sbox osl.Sandbox) {
-	n.Lock()
-	n.sbox = sbox
-	n.Unlock()
-}
-
-func (n *network) setNetlinkSocket(nlSk *nl.NetlinkSocket) {
-	n.Lock()
-	n.nlSocket = nlSk
-	n.Unlock()
-}
-
 func (n *network) vxlanID(s *subnet) uint32 {
 	n.Lock()
 	defer n.Unlock()
-
 	return s.vni
 }
 
@@ -997,7 +1011,6 @@ func (n *network) SetValue(value []byte) error {
 				subnetIP: subnetIP,
 				gwIP:     gwIP,
 				vni:      vni,
-				once:     &sync.Once{},
 			}
 			n.subnets = append(n.subnets, s)
 		} else {
@@ -1023,7 +1036,10 @@ func (n *network) writeToStore() error {
 }
 
 func (n *network) releaseVxlanID() ([]uint32, error) {
-	if len(n.subnets) == 0 {
+	n.Lock()
+	nSubnets := len(n.subnets)
+	n.Unlock()
+	if nSubnets == 0 {
 		return nil, nil
 	}
 
@@ -1039,14 +1055,17 @@ func (n *network) releaseVxlanID() ([]uint32, error) {
 		}
 	}
 	var vnis []uint32
+	n.Lock()
 	for _, s := range n.subnets {
 		if n.driver.vxlanIdm != nil {
-			vni := n.vxlanID(s)
-			vnis = append(vnis, vni)
-			n.driver.vxlanIdm.Release(uint64(vni))
+			vnis = append(vnis, s.vni)
 		}
+		s.vni = 0
+	}
+	n.Unlock()
 
-		n.setVxlanID(s, 0)
+	for _, vni := range vnis {
+		n.driver.vxlanIdm.Release(uint64(vni))
 	}
 
 	return vnis, nil
@@ -1054,7 +1073,7 @@ func (n *network) releaseVxlanID() ([]uint32, error) {
 
 func (n *network) obtainVxlanID(s *subnet) error {
 	//return if the subnet already has a vxlan id assigned
-	if s.vni != 0 {
+	if n.vxlanID(s) != 0 {
 		return nil
 	}
 
@@ -1067,7 +1086,7 @@ func (n *network) obtainVxlanID(s *subnet) error {
 			return fmt.Errorf("getting network %q from datastore failed %v", n.id, err)
 		}
 
-		if s.vni == 0 {
+		if n.vxlanID(s) == 0 {
 			vxlanID, err := n.driver.vxlanIdm.GetID(true)
 			if err != nil {
 				return fmt.Errorf("failed to allocate vxlan id: %v", err)

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

@@ -105,17 +105,6 @@ func Init(dc driverapi.DriverCallback, config map[string]interface{}) error {
 		logrus.Warnf("Failure during overlay endpoints restore: %v", err)
 	}
 
-	// If an error happened when the network join the sandbox during the endpoints restore
-	// we should reset it now along with the once variable, so that subsequent endpoint joins
-	// outside of the restore path can potentially fix the network join and succeed.
-	for nid, n := range d.networks {
-		if n.initErr != nil {
-			logrus.Infof("resetting init error and once variable for network %s after unsuccessful endpoint restore: %v", nid, n.initErr)
-			n.initErr = nil
-			n.once = &sync.Once{}
-		}
-	}
-
 	return dc.RegisterDriver(networkType, d, c)
 }
 
@@ -151,14 +140,10 @@ func (d *driver) restoreEndpoints() error {
 			return fmt.Errorf("could not find subnet for endpoint %s", ep.id)
 		}
 
-		if err := n.joinSandbox(true); err != nil {
+		if err := n.joinSandbox(s, true, true); err != nil {
 			return fmt.Errorf("restore network sandbox failed: %v", err)
 		}
 
-		if err := n.joinSubnetSandbox(s, true); err != nil {
-			return fmt.Errorf("restore subnet sandbox failed for %q: %v", s.subnetIP.String(), err)
-		}
-
 		Ifaces := make(map[string][]osl.IfaceOption)
 		vethIfaceOption := make([]osl.IfaceOption, 1)
 		vethIfaceOption = append(vethIfaceOption, n.sbox.InterfaceOptions().Master(s.brName))
@@ -166,10 +151,10 @@ func (d *driver) restoreEndpoints() error {
 
 		err := n.sbox.Restore(Ifaces, nil, nil, nil)
 		if err != nil {
+			n.leaveSandbox()
 			return fmt.Errorf("failed to restore overlay sandbox: %v", err)
 		}
 
-		n.incEndpointCount()
 		d.peerAdd(ep.nid, ep.id, ep.addr.IP, ep.addr.Mask, ep.mac, net.ParseIP(d.advertiseAddress), false, false, true)
 	}
 	return nil

vendor/github.com/docker/libnetwork/drivers/overlay/peerdb.go

@@ -7,7 +7,8 @@ import (
 	"sync"
 	"syscall"
 
-	"github.com/docker/libnetwork/common"
+	"github.com/docker/libnetwork/internal/caller"
+	"github.com/docker/libnetwork/internal/setmatrix"
 	"github.com/docker/libnetwork/osl"
 	"github.com/sirupsen/logrus"
 )
@@ -59,7 +60,7 @@ func (p *peerEntryDB) UnMarshalDB() peerEntry {
 
 type peerMap struct {
 	// set of peerEntry, note they have to be objects and not pointers to maintain the proper equality checks
-	mp common.SetMatrix
+	mp setmatrix.SetMatrix
 	sync.Mutex
 }
 
@@ -170,7 +171,7 @@ func (d *driver) peerDbAdd(nid, eid string, peerIP net.IP, peerIPMask net.IPMask
 	pMap, ok := d.peerDb.mp[nid]
 	if !ok {
 		d.peerDb.mp[nid] = &peerMap{
-			mp: common.NewSetMatrix(),
+			mp: setmatrix.NewSetMatrix(),
 		}
 
 		pMap = d.peerDb.mp[nid]
@@ -297,7 +298,7 @@ func (d *driver) peerOpRoutine(ctx context.Context, ch chan *peerOperation) {
 }
 
 func (d *driver) peerInit(nid string) {
-	callerName := common.CallerName(1)
+	callerName := caller.Name(1)
 	d.peerOpCh <- &peerOperation{
 		opType:     peerOperationINIT,
 		networkID:  nid,
@@ -331,7 +332,7 @@ func (d *driver) peerAdd(nid, eid string, peerIP net.IP, peerIPMask net.IPMask,
 		l2Miss:     l2Miss,
 		l3Miss:     l3Miss,
 		localPeer:  localPeer,
-		callerName: common.CallerName(1),
+		callerName: caller.Name(1),
 	}
 }
 
@@ -384,7 +385,7 @@ func (d *driver) peerAddOp(nid, eid string, peerIP net.IP, peerIPMask net.IPMask
 		return fmt.Errorf("couldn't get vxlan id for %q: %v", s.subnetIP.String(), err)
 	}
 
-	if err := n.joinSubnetSandbox(s, false); err != nil {
+	if err := n.joinSandbox(s, false, false); err != nil {
 		return fmt.Errorf("subnet sandbox join failed for %q: %v", s.subnetIP.String(), err)
 	}
 
@@ -422,7 +423,7 @@ func (d *driver) peerDelete(nid, eid string, peerIP net.IP, peerIPMask net.IPMas
 		peerIPMask: peerIPMask,
 		peerMac:    peerMac,
 		vtepIP:     vtep,
-		callerName: common.CallerName(1),
+		callerName: caller.Name(1),
 		localPeer:  localPeer,
 	}
 }
@@ -491,7 +492,7 @@ func (d *driver) peerFlush(nid string) {
 	d.peerOpCh <- &peerOperation{
 		opType:     peerOperationFLUSH,
 		networkID:  nid,
-		callerName: common.CallerName(1),
+		callerName: caller.Name(1),
 	}
 }
 

vendor/github.com/docker/libnetwork/drivers/remote/api/api.go

@@ -150,7 +150,7 @@ type JoinRequest struct {
 	Options    map[string]interface{}
 }
 
-// InterfaceName is the struct represetation of a pair of devices with source
+// InterfaceName is the struct representation of a pair of devices with source
 // and destination, for the purposes of putting an endpoint into a container.
 type InterfaceName struct {
 	SrcName   string

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

@@ -54,7 +54,7 @@ type IPAMNotifyFunc func(name string, driver ipamapi.Ipam, cap *ipamapi.Capabili
 // DriverNotifyFunc defines the notify function signature when a new network driver gets registered.
 type DriverNotifyFunc func(name string, driver driverapi.Driver, capability driverapi.Capability) error
 
-// New retruns a new driver registry handle.
+// New returns a new driver registry handle.
 func New(lDs, gDs interface{}, dfn DriverNotifyFunc, ifn IPAMNotifyFunc, pg plugingetter.PluginGetter) (*DrvRegistry, error) {
 	r := &DrvRegistry{
 		drivers:      make(driverTable),

vendor/github.com/docker/libnetwork/internal/caller/caller.go

@@ -1,4 +1,4 @@
-package common
+package caller
 
 import (
 	"runtime"
@@ -11,7 +11,7 @@ func callerInfo(i int) string {
 	if ok {
 		f := runtime.FuncForPC(ptr)
 		if f != nil {
-			// f.Name() is like: github.com/docker/libnetwork/common.MethodName
+			// f.Name() is like: github.com/docker/libnetwork/caller.MethodName
 			tmp := strings.Split(f.Name(), ".")
 			if len(tmp) > 0 {
 				fName = tmp[len(tmp)-1]
@@ -22,8 +22,8 @@ func callerInfo(i int) string {
 	return fName
 }
 
-// CallerName returns the name of the function at the specified level
+// Name returns the name of the function at the specified level
 // level == 0 means current method name
-func CallerName(level int) string {
+func Name(level int) string {
 	return callerInfo(2 + level)
 }

vendor/github.com/docker/libnetwork/internal/setmatrix/setmatrix.go

@@ -1,4 +1,4 @@
-package common
+package setmatrix
 
 import (
 	"sync"

vendor/github.com/docker/libnetwork/iptables/firewalld.go

@@ -66,7 +66,7 @@ func newConnection() (*Conn, error) {
 	return c, nil
 }
 
-// Innitialize D-Bus connection.
+// Initialize D-Bus connection.
 func (c *Conn) initConnection() error {
 	var err error
 

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

@@ -477,7 +477,7 @@ func raw(args ...string) ([]byte, error) {
 	return filterOutput(startTime, output, args...), err
 }
 
-// RawCombinedOutput inernally calls the Raw function and returns a non nil
+// RawCombinedOutput internally calls the Raw function and returns a non nil
 // error if Raw returned a non nil error or a non empty output
 func RawCombinedOutput(args ...string) error {
 	if output, err := Raw(args...); err != nil || len(output) != 0 {

vendor/github.com/docker/libnetwork/ipvs/netlink.go

@@ -100,7 +100,7 @@ func fillService(s *Service) nl.NetlinkRequestData {
 	return cmdAttr
 }
 
-func fillDestinaton(d *Destination) nl.NetlinkRequestData {
+func fillDestination(d *Destination) nl.NetlinkRequestData {
 	cmdAttr := nl.NewRtAttr(ipvsCmdAttrDest, nil)
 
 	nl.NewRtAttrChild(cmdAttr, ipvsDestAttrAddress, rawIPData(d.Address))
@@ -134,7 +134,7 @@ func (i *Handle) doCmdwithResponse(s *Service, d *Destination, cmd uint8) ([][]b
 		}
 
 	} else {
-		req.AddData(fillDestinaton(d))
+		req.AddData(fillDestination(d))
 	}
 
 	res, err := execute(i.sock, req, 0)

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

@@ -9,11 +9,11 @@ import (
 	"time"
 
 	"github.com/docker/docker/pkg/stringid"
-	"github.com/docker/libnetwork/common"
 	"github.com/docker/libnetwork/config"
 	"github.com/docker/libnetwork/datastore"
 	"github.com/docker/libnetwork/driverapi"
 	"github.com/docker/libnetwork/etchosts"
+	"github.com/docker/libnetwork/internal/setmatrix"
 	"github.com/docker/libnetwork/ipamapi"
 	"github.com/docker/libnetwork/netlabel"
 	"github.com/docker/libnetwork/netutils"
@@ -88,7 +88,7 @@ type NetworkInfo interface {
 type EndpointWalker func(ep Endpoint) bool
 
 // ipInfo is the reverse mapping from IP to service name to serve the PTR query.
-// extResolver is set if an externl server resolves a service name to this IP.
+// extResolver is set if an external server resolves a service name to this IP.
 // Its an indication to defer PTR queries also to that external server.
 type ipInfo struct {
 	name        string
@@ -104,9 +104,9 @@ type svcMapEntry struct {
 }
 
 type svcInfo struct {
-	svcMap     common.SetMatrix
-	svcIPv6Map common.SetMatrix
-	ipMap      common.SetMatrix
+	svcMap     setmatrix.SetMatrix
+	svcIPv6Map setmatrix.SetMatrix
+	ipMap      setmatrix.SetMatrix
 	service    map[string][]servicePorts
 }
 
@@ -1353,7 +1353,7 @@ func (n *network) updateSvcRecord(ep *endpoint, localEps []*endpoint, isAdd bool
 	}
 }
 
-func addIPToName(ipMap common.SetMatrix, name, serviceID string, ip net.IP) {
+func addIPToName(ipMap setmatrix.SetMatrix, name, serviceID string, ip net.IP) {
 	reverseIP := netutils.ReverseIP(ip.String())
 	ipMap.Insert(reverseIP, ipInfo{
 		name:      name,
@@ -1361,7 +1361,7 @@ func addIPToName(ipMap common.SetMatrix, name, serviceID string, ip net.IP) {
 	})
 }
 
-func delIPToName(ipMap common.SetMatrix, name, serviceID string, ip net.IP) {
+func delIPToName(ipMap setmatrix.SetMatrix, name, serviceID string, ip net.IP) {
 	reverseIP := netutils.ReverseIP(ip.String())
 	ipMap.Remove(reverseIP, ipInfo{
 		name:      name,
@@ -1369,14 +1369,14 @@ func delIPToName(ipMap common.SetMatrix, name, serviceID string, ip net.IP) {
 	})
 }
 
-func addNameToIP(svcMap common.SetMatrix, name, serviceID string, epIP net.IP) {
+func addNameToIP(svcMap setmatrix.SetMatrix, name, serviceID string, epIP net.IP) {
 	svcMap.Insert(name, svcMapEntry{
 		ip:        epIP.String(),
 		serviceID: serviceID,
 	})
 }
 
-func delNameToIP(svcMap common.SetMatrix, name, serviceID string, epIP net.IP) {
+func delNameToIP(svcMap setmatrix.SetMatrix, name, serviceID string, epIP net.IP) {
 	svcMap.Remove(name, svcMapEntry{
 		ip:        epIP.String(),
 		serviceID: serviceID,
@@ -1399,9 +1399,9 @@ func (n *network) addSvcRecords(eID, name, serviceID string, epIP, epIPv6 net.IP
 	sr, ok := c.svcRecords[n.ID()]
 	if !ok {
 		sr = svcInfo{
-			svcMap:     common.NewSetMatrix(),
-			svcIPv6Map: common.NewSetMatrix(),
-			ipMap:      common.NewSetMatrix(),
+			svcMap:     setmatrix.NewSetMatrix(),
+			svcIPv6Map: setmatrix.NewSetMatrix(),
+			ipMap:      setmatrix.NewSetMatrix(),
 		}
 		c.svcRecords[n.ID()] = sr
 	}
@@ -1654,7 +1654,7 @@ func (n *network) ipamAllocateVersion(ipVer int, ipam ipamapi.Ipam) error {
 					return types.BadRequestErrorf("non parsable secondary ip address (%s:%s) passed for network %s", k, v, n.Name())
 				}
 				if !d.Pool.Contains(ip) {
-					return types.ForbiddenErrorf("auxilairy address: (%s:%s) must belong to the master pool: %s", k, v, d.Pool)
+					return types.ForbiddenErrorf("auxiliary address: (%s:%s) must belong to the master pool: %s", k, v, d.Pool)
 				}
 				// Attempt reservation in the container addressable pool, silent the error if address does not belong to that pool
 				if d.IPAMData.AuxAddresses[k], _, err = ipam.RequestAddress(d.PoolID, ip, nil); err != nil && err != ipamapi.ErrIPOutOfRange {
@@ -2036,7 +2036,7 @@ func (n *network) ResolveService(name string) ([]*net.SRV, []net.IP) {
 
 	logrus.Debugf("Service name To resolve: %v", name)
 
-	// There are DNS implementaions that allow SRV queries for names not in
+	// There are DNS implementations that allow SRV queries for names not in
 	// the format defined by RFC 2782. Hence specific validations checks are
 	// not done
 	parts := strings.Split(name, ".")
@@ -2126,7 +2126,7 @@ func (n *network) lbEndpointName() string {
 func (n *network) createLoadBalancerSandbox() (retErr error) {
 	sandboxName := n.lbSandboxName()
 	// Mark the sandbox to be a load balancer
-	sbOptions := []SandboxOption{OptionLoadBalancer()}
+	sbOptions := []SandboxOption{OptionLoadBalancer(n.id)}
 	if n.ingress {
 		sbOptions = append(sbOptions, OptionIngress())
 	}

vendor/github.com/docker/libnetwork/networkdb/cluster.go

@@ -243,7 +243,7 @@ func (nDB *NetworkDB) clusterLeave() error {
 }
 
 func (nDB *NetworkDB) triggerFunc(stagger time.Duration, C <-chan time.Time, f func()) {
-	// Use a random stagger to avoid syncronizing
+	// Use a random stagger to avoid synchronizing
 	randStagger := time.Duration(uint64(rnd.Int63()) % uint64(stagger))
 	select {
 	case <-time.After(randStagger):

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

@@ -58,7 +58,7 @@ type NetworkDB struct {
 	// List of all peer nodes which have left
 	leftNodes map[string]*node
 
-	// A multi-dimensional map of network/node attachmemts. The
+	// A multi-dimensional map of network/node attachments. The
 	// first key is a node name and the second key is a network ID
 	// for the network that node is participating in.
 	networks map[string]map[string]*network
@@ -153,7 +153,7 @@ type network struct {
 	entriesNumber int
 }
 
-// Config represents the configuration of the networdb instance and
+// Config represents the configuration of the networkdb instance and
 // can be passed by the caller.
 type Config struct {
 	// NodeID is the node unique identifier of the node when is part of the cluster

vendor/github.com/docker/libnetwork/networkdb/networkdb.pb.go

@@ -48,7 +48,7 @@ type MessageType int32
 
 const (
 	MessageTypeInvalid MessageType = 0
-	// NetworEvent message type is used to communicate network
+	// NetworkEvent message type is used to communicate network
 	// attachments on the node.
 	MessageTypeNetworkEvent MessageType = 1
 	// TableEvent message type is used to communicate any table
@@ -66,7 +66,7 @@ const (
 	// which is a pack of many message of above types, packed into
 	// a single compound message.
 	MessageTypeCompound MessageType = 5
-	// NodeEvent message type is used to communicare node
+	// NodeEvent message type is used to communicate node
 	// join/leave events in the cluster
 	MessageTypeNodeEvent MessageType = 6
 )

vendor/github.com/docker/libnetwork/networkdb/networkdb.proto

@@ -19,7 +19,7 @@ enum MessageType {
 
 	INVALID = 0 [(gogoproto.enumvalue_customname) = "MessageTypeInvalid"];
 
-	// NetworEvent message type is used to communicate network
+	// NetworkEvent message type is used to communicate network
 	// attachments on the node.
 	NETWORK_EVENT = 1 [(gogoproto.enumvalue_customname) = "MessageTypeNetworkEvent"];
 
@@ -42,7 +42,7 @@ enum MessageType {
 	// a single compound message.
 	COMPOUND = 5 [(gogoproto.enumvalue_customname) = "MessageTypeCompound"];
 
-	// NodeEvent message type is used to communicare node
+	// NodeEvent message type is used to communicate node
 	// join/leave events in the cluster
 	NODE_EVENT = 6 [(gogoproto.enumvalue_customname) = "MessageTypeNodeEvent"];
 }

vendor/github.com/docker/libnetwork/networkdb/networkdbdiagnostic.go

@@ -6,8 +6,8 @@ import (
 	"net/http"
 	"strings"
 
-	"github.com/docker/libnetwork/common"
 	"github.com/docker/libnetwork/diagnostic"
+	"github.com/docker/libnetwork/internal/caller"
 	"github.com/sirupsen/logrus"
 )
 
@@ -37,7 +37,7 @@ func dbJoin(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("join cluster")
 
 	if len(r.Form["members"]) < 1 {
@@ -70,7 +70,7 @@ func dbPeers(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("network peers")
 
 	if len(r.Form["nid"]) < 1 {
@@ -104,7 +104,7 @@ func dbClusterPeers(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("cluster peers")
 
 	nDB, ok := ctx.(*NetworkDB)
@@ -127,7 +127,7 @@ func dbCreateEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	unsafe, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("create entry")
 
 	if len(r.Form["tname"]) < 1 ||
@@ -176,7 +176,7 @@ func dbUpdateEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	unsafe, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("update entry")
 
 	if len(r.Form["tname"]) < 1 ||
@@ -224,7 +224,7 @@ func dbDeleteEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("delete entry")
 
 	if len(r.Form["tname"]) < 1 ||
@@ -261,7 +261,7 @@ func dbGetEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	unsafe, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("get entry")
 
 	if len(r.Form["tname"]) < 1 ||
@@ -307,7 +307,7 @@ func dbJoinNetwork(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("join network")
 
 	if len(r.Form["nid"]) < 1 {
@@ -339,7 +339,7 @@ func dbLeaveNetwork(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("leave network")
 
 	if len(r.Form["nid"]) < 1 {
@@ -371,7 +371,7 @@ func dbGetTable(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	unsafe, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("get table")
 
 	if len(r.Form["tname"]) < 1 ||
@@ -419,7 +419,7 @@ func dbNetworkStats(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 	_, json := diagnostic.ParseHTTPFormOptions(r)
 
 	// audit logs
-	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": common.CallerName(0), "url": r.URL.String()})
+	log := logrus.WithFields(logrus.Fields{"component": "diagnostic", "remoteIP": r.RemoteAddr, "method": caller.Name(0), "url": r.URL.String()})
 	log.Info("network stats")
 
 	if len(r.Form["nid"]) < 1 {

vendor/github.com/docker/libnetwork/osl/interface_linux.go

@@ -289,6 +289,16 @@ func (n *networkNamespace) AddInterface(srcName, dstPrefix string, options ...If
 
 	// Configure the interface now this is moved in the proper namespace.
 	if err := configureInterface(nlh, iface, i); err != nil {
+		// If configuring the device fails move it back to the host namespace
+		// and change the name back to the source name. This allows the caller
+		// to properly cleanup the interface. Its important especially for
+		// interfaces with global attributes, ex: vni id for vxlan interfaces.
+		if nerr := nlh.LinkSetName(iface, i.SrcName()); nerr != nil {
+			logrus.Errorf("renaming interface (%s->%s) failed, %v after config error %v", i.DstName(), i.SrcName(), nerr, err)
+		}
+		if nerr := nlh.LinkSetNsFd(iface, ns.ParseHandlerInt()); nerr != nil {
+			logrus.Errorf("moving inteface %s to host ns failed, %v, after config error %v", i.SrcName(), nerr, err)
+		}
 		return err
 	}
 

vendor/github.com/docker/libnetwork/osl/kernel/knobs.go

@@ -2,7 +2,7 @@ package kernel
 
 type conditionalCheck func(val1, val2 string) bool
 
-// OSValue represents a tuple, value defired, check function when to apply the value
+// OSValue represents a tuple, value defined, check function when to apply the value
 type OSValue struct {
 	Value   string
 	CheckFn conditionalCheck

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

@@ -14,6 +14,11 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
+const (
+	// DefaultResolvConf points to the default file used for dns configuration on a linux machine
+	DefaultResolvConf = "/etc/resolv.conf"
+)
+
 var (
 	// Note: the default IPv4 & IPv6 resolvers are set to Google's Public DNS
 	defaultIPv4Dns = []string{"nameserver 8.8.8.8", "nameserver 8.8.4.4"}
@@ -50,15 +55,7 @@ type File struct {
 
 // Get returns the contents of /etc/resolv.conf and its hash
 func Get() (*File, error) {
-	resolv, err := ioutil.ReadFile("/etc/resolv.conf")
-	if err != nil {
-		return nil, err
-	}
-	hash, err := ioutils.HashData(bytes.NewReader(resolv))
-	if err != nil {
-		return nil, err
-	}
-	return &File{Content: resolv, Hash: hash}, nil
+	return GetSpecific(DefaultResolvConf)
 }
 
 // GetSpecific returns the contents of the user specified resolv.conf file and its hash

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

@@ -35,7 +35,7 @@ type Resolver interface {
 }
 
 // DNSBackend represents a backend DNS resolver used for DNS name
-// resolution. All the queries to the resolver are forwared to the
+// resolution. All the queries to the resolver are forwarded to the
 // backend resolver.
 type DNSBackend interface {
 	// ResolveName resolves a service name to an IPv4 or IPv6 address by searching

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

@@ -84,6 +84,7 @@ type sandbox struct {
 	ingress            bool
 	ndotsSet           bool
 	oslTypes           []osl.SandboxType // slice of properties of this sandbox
+	loadBalancerNID    string            // NID that this SB is a load balancer for
 	sync.Mutex
 	// This mutex is used to serialize service related operation for an endpoint
 	// The lock is here because the endpoint is saved into the store so is not unique
@@ -467,7 +468,7 @@ func (sb *sandbox) ResolveService(name string) ([]*net.SRV, []net.IP) {
 
 	logrus.Debugf("Service name To resolve: %v", name)
 
-	// There are DNS implementaions that allow SRV queries for names not in
+	// There are DNS implementations that allow SRV queries for names not in
 	// the format defined by RFC 2782. Hence specific validations checks are
 	// not done
 	parts := strings.Split(name, ".")
@@ -1098,8 +1099,8 @@ func OptionDNSOptions(options string) SandboxOption {
 	}
 }
 
-// OptionUseDefaultSandbox function returns an option setter for using default sandbox to
-// be passed to container Create method.
+// OptionUseDefaultSandbox function returns an option setter for using default sandbox
+// (host namespace) to be passed to container Create method.
 func OptionUseDefaultSandbox() SandboxOption {
 	return func(sb *sandbox) {
 		sb.config.useDefaultSandBox = true
@@ -1169,8 +1170,9 @@ func OptionIngress() SandboxOption {
 
 // OptionLoadBalancer function returns an option setter for marking a
 // sandbox as a load balancer sandbox.
-func OptionLoadBalancer() SandboxOption {
+func OptionLoadBalancer(nid string) SandboxOption {
 	return func(sb *sandbox) {
+		sb.loadBalancerNID = nid
 		sb.oslTypes = append(sb.oslTypes, osl.SandboxTypeLoadBalancer)
 	}
 }

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

@@ -81,7 +81,9 @@ func (sb *sandbox) buildHostsFile() error {
 	}
 
 	// This is for the host mode networking
-	if sb.config.originHostsPath != "" {
+	if sb.config.useDefaultSandBox && len(sb.config.extraHosts) == 0 {
+		// We are working under the assumption that the origin file option had been properly expressed by the upper layer
+		// if not here we are going to error out
 		if err := copyFile(sb.config.originHostsPath, sb.config.hostsPath); err != nil && !os.IsNotExist(err) {
 			return types.InternalErrorf("could not copy source hosts file %s to %s: %v", sb.config.originHostsPath, sb.config.hostsPath, err)
 		}
@@ -190,8 +192,13 @@ func (sb *sandbox) setupDNS() error {
 		return err
 	}
 
-	// This is for the host mode networking
-	if sb.config.originResolvConfPath != "" {
+	// When the user specify a conainter in the host namespace and do no have any dns option specified
+	// we just copy the host resolv.conf from the host itself
+	if sb.config.useDefaultSandBox &&
+		len(sb.config.dnsList) == 0 && len(sb.config.dnsSearchList) == 0 && len(sb.config.dnsOptionsList) == 0 {
+
+		// We are working under the assumption that the origin file option had been properly expressed by the upper layer
+		// if not here we are going to error out
 		if err := copyFile(sb.config.originResolvConfPath, sb.config.resolvConfPath); err != nil {
 			if !os.IsNotExist(err) {
 				return fmt.Errorf("could not copy source resolv.conf file %s to %s: %v", sb.config.originResolvConfPath, sb.config.resolvConfPath, err)
@@ -204,7 +211,12 @@ func (sb *sandbox) setupDNS() error {
 		return nil
 	}
 
-	currRC, err := resolvconf.Get()
+	originResolvConfPath := sb.config.originResolvConfPath
+	if originResolvConfPath == "" {
+		// if not specified fallback to default /etc/resolv.conf
+		originResolvConfPath = resolvconf.DefaultResolvConf
+	}
+	currRC, err := resolvconf.GetSpecific(originResolvConfPath)
 	if err != nil {
 		if !os.IsNotExist(err) {
 			return err
@@ -241,7 +253,7 @@ func (sb *sandbox) setupDNS() error {
 		sb.setExternalResolvers(newRC.Content, types.IPv4, false)
 	} else {
 		// If the host resolv.conf file has 127.0.0.x container should
-		// use the host restolver for queries. This is supported by the
+		// use the host resolver for queries. This is supported by the
 		// docker embedded DNS server. Hence save the external resolvers
 		// before filtering it out.
 		sb.setExternalResolvers(currRC.Content, types.IPv4, true)
@@ -271,7 +283,7 @@ func (sb *sandbox) updateDNS(ipv6Enabled bool) error {
 	)
 
 	// This is for the host mode networking
-	if sb.config.originResolvConfPath != "" {
+	if sb.config.useDefaultSandBox {
 		return nil
 	}
 

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

@@ -5,7 +5,7 @@ import (
 	"net"
 	"sync"
 
-	"github.com/docker/libnetwork/common"
+	"github.com/docker/libnetwork/internal/setmatrix"
 )
 
 var (
@@ -54,7 +54,7 @@ type service struct {
 	// associated with it. At stable state the endpoint ID expected is 1
 	// but during transition and service change it is possible to have
 	// temporary more than 1
-	ipToEndpoint common.SetMatrix
+	ipToEndpoint setmatrix.SetMatrix
 
 	deleted bool
 

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

@@ -5,7 +5,7 @@ package libnetwork
 import (
 	"net"
 
-	"github.com/docker/libnetwork/common"
+	"github.com/docker/libnetwork/internal/setmatrix"
 	"github.com/sirupsen/logrus"
 )
 
@@ -139,7 +139,7 @@ func newService(name string, id string, ingressPorts []*PortConfig, serviceAlias
 		ingressPorts:  ingressPorts,
 		loadBalancers: make(map[string]*loadBalancer),
 		aliases:       serviceAliases,
-		ipToEndpoint:  common.NewSetMatrix(),
+		ipToEndpoint:  setmatrix.NewSetMatrix(),
 	}
 }
 

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

@@ -27,7 +27,7 @@ import (
 
 func init() {
 	reexec.Register("fwmarker", fwMarker)
-	reexec.Register("redirecter", redirecter)
+	reexec.Register("redirector", redirector)
 }
 
 // Populate all loadbalancers on the network that the passed endpoint
@@ -431,7 +431,7 @@ func programIngress(gwIP net.IP, ingressPorts []*PortConfig, isDelete bool) erro
 // DOCKER-USER so the user is able to filter packet first.
 // The second rule should be jump to INGRESS-CHAIN.
 // This chain has the rules to allow access to the published ports for swarm tasks
-// from local bridge networks and docker_gwbridge (ie:taks on other swarm netwroks)
+// from local bridge networks and docker_gwbridge (ie:taks on other swarm networks)
 func arrangeIngressFilterRule() {
 	if iptables.ExistChain(ingressChain, iptables.Filter) {
 		if iptables.Exists(iptables.Filter, "FORWARD", "-j", ingressChain) {
@@ -668,7 +668,7 @@ func addRedirectRules(path string, eIP *net.IPNet, ingressPorts []*PortConfig) e
 
 	cmd := &exec.Cmd{
 		Path:   reexec.Self(),
-		Args:   append([]string{"redirecter"}, path, eIP.String(), ingressPortsFile),
+		Args:   append([]string{"redirector"}, path, eIP.String(), ingressPortsFile),
 		Stdout: os.Stdout,
 		Stderr: os.Stderr,
 	}
@@ -680,8 +680,8 @@ func addRedirectRules(path string, eIP *net.IPNet, ingressPorts []*PortConfig) e
 	return nil
 }
 
-// Redirecter reexec function.
-func redirecter() {
+// Redirector reexec function.
+func redirector() {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()