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package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"sort"
"strconv"
"strings"
"sync"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/container"
clustertypes "github.com/docker/docker/daemon/cluster/provider"
internalnetwork "github.com/docker/docker/daemon/network"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/libnetwork"
lncluster "github.com/docker/docker/libnetwork/cluster"
"github.com/docker/docker/libnetwork/driverapi"
"github.com/docker/docker/libnetwork/ipamapi"
"github.com/docker/docker/libnetwork/netlabel"
"github.com/docker/docker/libnetwork/networkdb"
"github.com/docker/docker/libnetwork/options"
networktypes "github.com/docker/docker/libnetwork/types"
"github.com/docker/docker/opts"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/runconfig"
"github.com/docker/go-connections/nat"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// PredefinedNetworkError is returned when user tries to create predefined network that already exists.
type PredefinedNetworkError string
func (pnr PredefinedNetworkError) Error() string {
return fmt.Sprintf("operation is not permitted on predefined %s network ", string(pnr))
}
// Forbidden denotes the type of this error
func (pnr PredefinedNetworkError) Forbidden() {}
// NetworkControllerEnabled checks if the networking stack is enabled.
// This feature depends on OS primitives and it's disabled in systems like Windows.
func (daemon *Daemon) NetworkControllerEnabled() bool {
return daemon.netController != nil
}
// NetworkController returns the network controller created by the daemon.
func (daemon *Daemon) NetworkController() libnetwork.NetworkController {
return daemon.netController
}
// FindNetwork returns a network based on:
// 1. Full ID
// 2. Full Name
// 3. Partial ID
// as long as there is no ambiguity
func (daemon *Daemon) FindNetwork(term string) (libnetwork.Network, error) {
listByFullName := []libnetwork.Network{}
listByPartialID := []libnetwork.Network{}
for _, nw := range daemon.getAllNetworks() {
if nw.ID() == term {
return nw, nil
}
if nw.Name() == term {
listByFullName = append(listByFullName, nw)
}
if strings.HasPrefix(nw.ID(), term) {
listByPartialID = append(listByPartialID, nw)
}
}
switch {
case len(listByFullName) == 1:
return listByFullName[0], nil
case len(listByFullName) > 1:
return nil, errdefs.InvalidParameter(errors.Errorf("network %s is ambiguous (%d matches found on name)", term, len(listByFullName)))
case len(listByPartialID) == 1:
return listByPartialID[0], nil
case len(listByPartialID) > 1:
return nil, errdefs.InvalidParameter(errors.Errorf("network %s is ambiguous (%d matches found based on ID prefix)", term, len(listByPartialID)))
}
// Be very careful to change the error type here, the
// libnetwork.ErrNoSuchNetwork error is used by the controller
// to retry the creation of the network as managed through the swarm manager
return nil, errdefs.NotFound(libnetwork.ErrNoSuchNetwork(term))
}
// GetNetworkByID function returns a network whose ID matches the given ID.
// It fails with an error if no matching network is found.
func (daemon *Daemon) GetNetworkByID(id string) (libnetwork.Network, error) {
c := daemon.netController
if c == nil {
return nil, errors.Wrap(libnetwork.ErrNoSuchNetwork(id), "netcontroller is nil")
}
return c.NetworkByID(id)
}
// GetNetworkByName function returns a network for a given network name.
// If no network name is given, the default network is returned.
func (daemon *Daemon) GetNetworkByName(name string) (libnetwork.Network, error) {
c := daemon.netController
if c == nil {
return nil, libnetwork.ErrNoSuchNetwork(name)
}
if name == "" {
name = c.Config().Daemon.DefaultNetwork
}
return c.NetworkByName(name)
}
// GetNetworksByIDPrefix returns a list of networks whose ID partially matches zero or more networks
func (daemon *Daemon) GetNetworksByIDPrefix(partialID string) []libnetwork.Network {
c := daemon.netController
if c == nil {
return nil
}
list := []libnetwork.Network{}
l := func(nw libnetwork.Network) bool {
if strings.HasPrefix(nw.ID(), partialID) {
list = append(list, nw)
}
return false
}
c.WalkNetworks(l)
return list
}
// getAllNetworks returns a list containing all networks
func (daemon *Daemon) getAllNetworks() []libnetwork.Network {
c := daemon.netController
if c == nil {
return nil
}
return c.Networks()
}
type ingressJob struct {
create *clustertypes.NetworkCreateRequest
ip net.IP
jobDone chan struct{}
}
var (
ingressWorkerOnce sync.Once
ingressJobsChannel chan *ingressJob
ingressID string
)
func (daemon *Daemon) startIngressWorker() {
ingressJobsChannel = make(chan *ingressJob, 100)
go func() {
//nolint: gosimple
for {
select {
case r := <-ingressJobsChannel:
if r.create != nil {
daemon.setupIngress(r.create, r.ip, ingressID)
ingressID = r.create.ID
} else {
daemon.releaseIngress(ingressID)
ingressID = ""
}
close(r.jobDone)
}
}
}()
}
// enqueueIngressJob adds a ingress add/rm request to the worker queue.
// It guarantees the worker is started.
func (daemon *Daemon) enqueueIngressJob(job *ingressJob) {
ingressWorkerOnce.Do(daemon.startIngressWorker)
ingressJobsChannel <- job
}
// SetupIngress setups ingress networking.
// The function returns a channel which will signal the caller when the programming is completed.
func (daemon *Daemon) SetupIngress(create clustertypes.NetworkCreateRequest, nodeIP string) (<-chan struct{}, error) {
ip, _, err := net.ParseCIDR(nodeIP)
if err != nil {
return nil, err
}
done := make(chan struct{})
daemon.enqueueIngressJob(&ingressJob{&create, ip, done})
return done, nil
}
// ReleaseIngress releases the ingress networking.
// The function returns a channel which will signal the caller when the programming is completed.
func (daemon *Daemon) ReleaseIngress() (<-chan struct{}, error) {
done := make(chan struct{})
daemon.enqueueIngressJob(&ingressJob{nil, nil, done})
return done, nil
}
func (daemon *Daemon) setupIngress(create *clustertypes.NetworkCreateRequest, ip net.IP, staleID string) {
controller := daemon.netController
controller.AgentInitWait()
if staleID != "" && staleID != create.ID {
daemon.releaseIngress(staleID)
}
if _, err := daemon.createNetwork(create.NetworkCreateRequest, create.ID, true); err != nil {
// If it is any other error other than already
// exists error log error and return.
if _, ok := err.(libnetwork.NetworkNameError); !ok {
logrus.Errorf("Failed creating ingress network: %v", err)
return
}
// Otherwise continue down the call to create or recreate sandbox.
}
_, err := daemon.GetNetworkByID(create.ID)
if err != nil {
logrus.Errorf("Failed getting ingress network by id after creating: %v", err)
}
}
func (daemon *Daemon) releaseIngress(id string) {
controller := daemon.netController
if id == "" {
return
}
n, err := controller.NetworkByID(id)
if err != nil {
logrus.Errorf("failed to retrieve ingress network %s: %v", id, err)
return
}
if err := n.Delete(libnetwork.NetworkDeleteOptionRemoveLB); err != nil {
logrus.Errorf("Failed to delete ingress network %s: %v", n.ID(), err)
return
}
}
// SetNetworkBootstrapKeys sets the bootstrap keys.
func (daemon *Daemon) SetNetworkBootstrapKeys(keys []*networktypes.EncryptionKey) error {
err := daemon.netController.SetKeys(keys)
if err == nil {
// Upon successful key setting dispatch the keys available event
daemon.cluster.SendClusterEvent(lncluster.EventNetworkKeysAvailable)
}
return err
}
// UpdateAttachment notifies the attacher about the attachment config.
func (daemon *Daemon) UpdateAttachment(networkName, networkID, containerID string, config *network.NetworkingConfig) error {
if daemon.clusterProvider == nil {
return fmt.Errorf("cluster provider is not initialized")
}
if err := daemon.clusterProvider.UpdateAttachment(networkName, containerID, config); err != nil {
return daemon.clusterProvider.UpdateAttachment(networkID, containerID, config)
}
return nil
}
// WaitForDetachment makes the cluster manager wait for detachment of
// the container from the network.
func (daemon *Daemon) WaitForDetachment(ctx context.Context, networkName, networkID, taskID, containerID string) error {
if daemon.clusterProvider == nil {
return fmt.Errorf("cluster provider is not initialized")
}
return daemon.clusterProvider.WaitForDetachment(ctx, networkName, networkID, taskID, containerID)
}
// CreateManagedNetwork creates an agent network.
func (daemon *Daemon) CreateManagedNetwork(create clustertypes.NetworkCreateRequest) error {
_, err := daemon.createNetwork(create.NetworkCreateRequest, create.ID, true)
return err
}
// CreateNetwork creates a network with the given name, driver and other optional parameters
func (daemon *Daemon) CreateNetwork(create types.NetworkCreateRequest) (*types.NetworkCreateResponse, error) {
resp, err := daemon.createNetwork(create, "", false)
if err != nil {
return nil, err
}
return resp, err
}
func (daemon *Daemon) createNetwork(create types.NetworkCreateRequest, id string, agent bool) (*types.NetworkCreateResponse, error) {
if runconfig.IsPreDefinedNetwork(create.Name) {
return nil, PredefinedNetworkError(create.Name)
}
var warning string
nw, err := daemon.GetNetworkByName(create.Name)
if err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
return nil, err
}
}
if nw != nil {
// check if user defined CheckDuplicate, if set true, return err
// otherwise prepare a warning message
if create.CheckDuplicate {
if !agent || nw.Info().Dynamic() {
return nil, libnetwork.NetworkNameError(create.Name)
}
}
warning = fmt.Sprintf("Network with name %s (id : %s) already exists", nw.Name(), nw.ID())
}
c := daemon.netController
driver := create.Driver
if driver == "" {
driver = c.Config().Daemon.DefaultDriver
}
nwOptions := []libnetwork.NetworkOption{
libnetwork.NetworkOptionEnableIPv6(create.EnableIPv6),
libnetwork.NetworkOptionDriverOpts(create.Options),
libnetwork.NetworkOptionLabels(create.Labels),
libnetwork.NetworkOptionAttachable(create.Attachable),
libnetwork.NetworkOptionIngress(create.Ingress),
libnetwork.NetworkOptionScope(create.Scope),
}
if create.ConfigOnly {
nwOptions = append(nwOptions, libnetwork.NetworkOptionConfigOnly())
}
if create.IPAM != nil {
ipam := create.IPAM
v4Conf, v6Conf, err := getIpamConfig(ipam.Config)
if err != nil {
return nil, err
}
nwOptions = append(nwOptions, libnetwork.NetworkOptionIpam(ipam.Driver, "", v4Conf, v6Conf, ipam.Options))
}
if create.Internal {
nwOptions = append(nwOptions, libnetwork.NetworkOptionInternalNetwork())
}
if agent {
nwOptions = append(nwOptions, libnetwork.NetworkOptionDynamic())
nwOptions = append(nwOptions, libnetwork.NetworkOptionPersist(false))
}
if create.ConfigFrom != nil {
nwOptions = append(nwOptions, libnetwork.NetworkOptionConfigFrom(create.ConfigFrom.Network))
}
if agent && driver == "overlay" {
nodeIP, exists := daemon.GetAttachmentStore().GetIPForNetwork(id)
if !exists {
return nil, fmt.Errorf("Failed to find a load balancer IP to use for network: %v", id)
}
nwOptions = append(nwOptions, libnetwork.NetworkOptionLBEndpoint(nodeIP))
}
n, err := c.NewNetwork(driver, create.Name, id, nwOptions...)
if err != nil {
if _, ok := err.(libnetwork.ErrDataStoreNotInitialized); ok {
//nolint: golint
return nil, errors.New("This node is not a swarm manager. Use \"docker swarm init\" or \"docker swarm join\" to connect this node to swarm and try again.")
}
return nil, err
}
daemon.pluginRefCount(driver, driverapi.NetworkPluginEndpointType, plugingetter.Acquire)
if create.IPAM != nil {
daemon.pluginRefCount(create.IPAM.Driver, ipamapi.PluginEndpointType, plugingetter.Acquire)
}
daemon.LogNetworkEvent(n, "create")
return &types.NetworkCreateResponse{
ID: n.ID(),
Warning: warning,
}, nil
}
func (daemon *Daemon) pluginRefCount(driver, capability string, mode int) {
var builtinDrivers []string
if capability == driverapi.NetworkPluginEndpointType {
builtinDrivers = daemon.netController.BuiltinDrivers()
} else if capability == ipamapi.PluginEndpointType {
builtinDrivers = daemon.netController.BuiltinIPAMDrivers()
}
for _, d := range builtinDrivers {
if d == driver {
return
}
}
if daemon.PluginStore != nil {
_, err := daemon.PluginStore.Get(driver, capability, mode)
if err != nil {
logrus.WithError(err).WithFields(logrus.Fields{"mode": mode, "driver": driver}).Error("Error handling plugin refcount operation")
}
}
}
func getIpamConfig(data []network.IPAMConfig) ([]*libnetwork.IpamConf, []*libnetwork.IpamConf, error) {
ipamV4Cfg := []*libnetwork.IpamConf{}
ipamV6Cfg := []*libnetwork.IpamConf{}
for _, d := range data {
iCfg := libnetwork.IpamConf{}
iCfg.PreferredPool = d.Subnet
iCfg.SubPool = d.IPRange
iCfg.Gateway = d.Gateway
iCfg.AuxAddresses = d.AuxAddress
ip, _, err := net.ParseCIDR(d.Subnet)
if err != nil {
return nil, nil, fmt.Errorf("Invalid subnet %s : %v", d.Subnet, err)
}
if ip.To4() != nil {
ipamV4Cfg = append(ipamV4Cfg, &iCfg)
} else {
ipamV6Cfg = append(ipamV6Cfg, &iCfg)
}
}
return ipamV4Cfg, ipamV6Cfg, nil
}
// UpdateContainerServiceConfig updates a service configuration.
func (daemon *Daemon) UpdateContainerServiceConfig(containerName string, serviceConfig *clustertypes.ServiceConfig) error {
ctr, err := daemon.GetContainer(containerName)
if err != nil {
return err
}
ctr.NetworkSettings.Service = serviceConfig
return nil
}
// ConnectContainerToNetwork connects the given container to the given
// network. If either cannot be found, an err is returned. If the
// network cannot be set up, an err is returned.
func (daemon *Daemon) ConnectContainerToNetwork(containerName, networkName string, endpointConfig *network.EndpointSettings) error {
ctr, err := daemon.GetContainer(containerName)
if err != nil {
return err
}
return daemon.ConnectToNetwork(ctr, networkName, endpointConfig)
}
// DisconnectContainerFromNetwork disconnects the given container from
// the given network. If either cannot be found, an err is returned.
func (daemon *Daemon) DisconnectContainerFromNetwork(containerName string, networkName string, force bool) error {
ctr, err := daemon.GetContainer(containerName)
if err != nil {
if force {
return daemon.ForceEndpointDelete(containerName, networkName)
}
return err
}
return daemon.DisconnectFromNetwork(ctr, networkName, force)
}
// GetNetworkDriverList returns the list of plugins drivers
// registered for network.
func (daemon *Daemon) GetNetworkDriverList() []string {
if !daemon.NetworkControllerEnabled() {
return nil
}
pluginList := daemon.netController.BuiltinDrivers()
managedPlugins := daemon.PluginStore.GetAllManagedPluginsByCap(driverapi.NetworkPluginEndpointType)
for _, plugin := range managedPlugins {
pluginList = append(pluginList, plugin.Name())
}
pluginMap := make(map[string]bool)
for _, plugin := range pluginList {
pluginMap[plugin] = true
}
networks := daemon.netController.Networks()
for _, nw := range networks {
if !pluginMap[nw.Type()] {
pluginList = append(pluginList, nw.Type())
pluginMap[nw.Type()] = true
}
}
sort.Strings(pluginList)
return pluginList
}
// DeleteManagedNetwork deletes an agent network.
// The requirement of networkID is enforced.
func (daemon *Daemon) DeleteManagedNetwork(networkID string) error {
n, err := daemon.GetNetworkByID(networkID)
if err != nil {
return err
}
return daemon.deleteNetwork(n, true)
}
// DeleteNetwork destroys a network unless it's one of docker's predefined networks.
func (daemon *Daemon) DeleteNetwork(networkID string) error {
n, err := daemon.GetNetworkByID(networkID)
if err != nil {
return errors.Wrap(err, "could not find network by ID")
}
return daemon.deleteNetwork(n, false)
}
func (daemon *Daemon) deleteNetwork(nw libnetwork.Network, dynamic bool) error {
if runconfig.IsPreDefinedNetwork(nw.Name()) && !dynamic {
err := fmt.Errorf("%s is a pre-defined network and cannot be removed", nw.Name())
return errdefs.Forbidden(err)
}
if dynamic && !nw.Info().Dynamic() {
if runconfig.IsPreDefinedNetwork(nw.Name()) {
// Predefined networks now support swarm services. Make this
// a no-op when cluster requests to remove the predefined network.
return nil
}
err := fmt.Errorf("%s is not a dynamic network", nw.Name())
return errdefs.Forbidden(err)
}
if err := nw.Delete(); err != nil {
return errors.Wrap(err, "error while removing network")
}
// If this is not a configuration only network, we need to
// update the corresponding remote drivers' reference counts
if !nw.Info().ConfigOnly() {
daemon.pluginRefCount(nw.Type(), driverapi.NetworkPluginEndpointType, plugingetter.Release)
ipamType, _, _, _ := nw.Info().IpamConfig()
daemon.pluginRefCount(ipamType, ipamapi.PluginEndpointType, plugingetter.Release)
daemon.LogNetworkEvent(nw, "destroy")
}
return nil
}
// GetNetworks returns a list of all networks
func (daemon *Daemon) GetNetworks(filter filters.Args, config types.NetworkListConfig) ([]types.NetworkResource, error) {
networks := daemon.getAllNetworks()
list := make([]types.NetworkResource, 0, len(networks))
var idx map[string]libnetwork.Network
if config.Detailed {
idx = make(map[string]libnetwork.Network)
}
for _, n := range networks {
nr := buildNetworkResource(n)
list = append(list, nr)
if config.Detailed {
idx[nr.ID] = n
}
}
var err error
list, err = internalnetwork.FilterNetworks(list, filter)
if err != nil {
return nil, err
}
if config.Detailed {
for i := range list {
np := &list[i]
buildDetailedNetworkResources(np, idx[np.ID], config.Verbose)
list[i] = *np
}
}
return list, nil
}
func buildNetworkResource(nw libnetwork.Network) types.NetworkResource {
r := types.NetworkResource{}
if nw == nil {
return r
}
info := nw.Info()
r.Name = nw.Name()
r.ID = nw.ID()
r.Created = info.Created()
r.Scope = info.Scope()
r.Driver = nw.Type()
r.EnableIPv6 = info.IPv6Enabled()
r.Internal = info.Internal()
r.Attachable = info.Attachable()
r.Ingress = info.Ingress()
r.Options = info.DriverOptions()
r.Containers = make(map[string]types.EndpointResource)
buildIpamResources(&r, info)
r.Labels = info.Labels()
r.ConfigOnly = info.ConfigOnly()
if cn := info.ConfigFrom(); cn != "" {
r.ConfigFrom = network.ConfigReference{Network: cn}
}
peers := info.Peers()
if len(peers) != 0 {
r.Peers = buildPeerInfoResources(peers)
}
return r
}
func buildDetailedNetworkResources(r *types.NetworkResource, nw libnetwork.Network, verbose bool) {
if nw == nil {
return
}
epl := nw.Endpoints()
for _, e := range epl {
ei := e.Info()
if ei == nil {
continue
}
sb := ei.Sandbox()
tmpID := e.ID()
key := "ep-" + tmpID
if sb != nil {
key = sb.ContainerID()
}
r.Containers[key] = buildEndpointResource(tmpID, e.Name(), ei)
}
if !verbose {
return
}
services := nw.Info().Services()
r.Services = make(map[string]network.ServiceInfo)
for name, service := range services {
tasks := []network.Task{}
for _, t := range service.Tasks {
tasks = append(tasks, network.Task{
Name: t.Name,
EndpointID: t.EndpointID,
EndpointIP: t.EndpointIP,
Info: t.Info,
})
}
r.Services[name] = network.ServiceInfo{
VIP: service.VIP,
Ports: service.Ports,
Tasks: tasks,
LocalLBIndex: service.LocalLBIndex,
}
}
}
func buildPeerInfoResources(peers []networkdb.PeerInfo) []network.PeerInfo {
peerInfo := make([]network.PeerInfo, 0, len(peers))
for _, peer := range peers {
peerInfo = append(peerInfo, network.PeerInfo{
Name: peer.Name,
IP: peer.IP,
})
}
return peerInfo
}
func buildIpamResources(r *types.NetworkResource, nwInfo libnetwork.NetworkInfo) {
id, opts, ipv4conf, ipv6conf := nwInfo.IpamConfig()
ipv4Info, ipv6Info := nwInfo.IpamInfo()
r.IPAM.Driver = id
r.IPAM.Options = opts
r.IPAM.Config = []network.IPAMConfig{}
for _, ip4 := range ipv4conf {
if ip4.PreferredPool == "" {
continue
}
iData := network.IPAMConfig{}
iData.Subnet = ip4.PreferredPool
iData.IPRange = ip4.SubPool
iData.Gateway = ip4.Gateway
iData.AuxAddress = ip4.AuxAddresses
r.IPAM.Config = append(r.IPAM.Config, iData)
}
if len(r.IPAM.Config) == 0 {
for _, ip4Info := range ipv4Info {
iData := network.IPAMConfig{}
iData.Subnet = ip4Info.IPAMData.Pool.String()
if ip4Info.IPAMData.Gateway != nil {
iData.Gateway = ip4Info.IPAMData.Gateway.IP.String()
}
r.IPAM.Config = append(r.IPAM.Config, iData)
}
}
hasIpv6Conf := false
for _, ip6 := range ipv6conf {
if ip6.PreferredPool == "" {
continue
}
hasIpv6Conf = true
iData := network.IPAMConfig{}
iData.Subnet = ip6.PreferredPool
iData.IPRange = ip6.SubPool
iData.Gateway = ip6.Gateway
iData.AuxAddress = ip6.AuxAddresses
r.IPAM.Config = append(r.IPAM.Config, iData)
}
if !hasIpv6Conf {
for _, ip6Info := range ipv6Info {
if ip6Info.IPAMData.Pool == nil {
continue
}
iData := network.IPAMConfig{}
iData.Subnet = ip6Info.IPAMData.Pool.String()
iData.Gateway = ip6Info.IPAMData.Gateway.String()
r.IPAM.Config = append(r.IPAM.Config, iData)
}
}
}
func buildEndpointResource(id string, name string, info libnetwork.EndpointInfo) types.EndpointResource {
er := types.EndpointResource{}
er.EndpointID = id
er.Name = name
ei := info
if ei == nil {
return er
}
if iface := ei.Iface(); iface != nil {
if mac := iface.MacAddress(); mac != nil {
er.MacAddress = mac.String()
}
if ip := iface.Address(); ip != nil && len(ip.IP) > 0 {
er.IPv4Address = ip.String()
}
if ipv6 := iface.AddressIPv6(); ipv6 != nil && len(ipv6.IP) > 0 {
er.IPv6Address = ipv6.String()
}
}
return er
}
// clearAttachableNetworks removes the attachable networks
// after disconnecting any connected container
func (daemon *Daemon) clearAttachableNetworks() {
for _, n := range daemon.getAllNetworks() {
if !n.Info().Attachable() {
continue
}
for _, ep := range n.Endpoints() {
epInfo := ep.Info()
if epInfo == nil {
continue
}
sb := epInfo.Sandbox()
if sb == nil {
continue
}
containerID := sb.ContainerID()
if err := daemon.DisconnectContainerFromNetwork(containerID, n.ID(), true); err != nil {
logrus.Warnf("Failed to disconnect container %s from swarm network %s on cluster leave: %v",
containerID, n.Name(), err)
}
}
if err := daemon.DeleteManagedNetwork(n.ID()); err != nil {
logrus.Warnf("Failed to remove swarm network %s on cluster leave: %v", n.Name(), err)
}
}
}
// buildCreateEndpointOptions builds endpoint options from a given network.
func buildCreateEndpointOptions(c *container.Container, n libnetwork.Network, epConfig *network.EndpointSettings, sb libnetwork.Sandbox, daemonDNS []string) ([]libnetwork.EndpointOption, error) {
var (
bindings = make(nat.PortMap)
pbList []networktypes.PortBinding
exposeList []networktypes.TransportPort
createOptions []libnetwork.EndpointOption
)
defaultNetName := runconfig.DefaultDaemonNetworkMode().NetworkName()
if (!serviceDiscoveryOnDefaultNetwork() && n.Name() == defaultNetName) ||
c.NetworkSettings.IsAnonymousEndpoint {
createOptions = append(createOptions, libnetwork.CreateOptionAnonymous())
}
if epConfig != nil {
ipam := epConfig.IPAMConfig
if ipam != nil {
var (
ipList []net.IP
ip, ip6, linkip net.IP
)
for _, ips := range ipam.LinkLocalIPs {
if linkip = net.ParseIP(ips); linkip == nil && ips != "" {
return nil, errors.Errorf("Invalid link-local IP address: %s", ipam.LinkLocalIPs)
}
ipList = append(ipList, linkip)
}
if ip = net.ParseIP(ipam.IPv4Address); ip == nil && ipam.IPv4Address != "" {
return nil, errors.Errorf("Invalid IPv4 address: %s)", ipam.IPv4Address)
}
if ip6 = net.ParseIP(ipam.IPv6Address); ip6 == nil && ipam.IPv6Address != "" {
return nil, errors.Errorf("Invalid IPv6 address: %s)", ipam.IPv6Address)
}
createOptions = append(createOptions,
libnetwork.CreateOptionIpam(ip, ip6, ipList, nil))
}
for _, alias := range epConfig.Aliases {
createOptions = append(createOptions, libnetwork.CreateOptionMyAlias(alias))
}
for k, v := range epConfig.DriverOpts {
createOptions = append(createOptions, libnetwork.EndpointOptionGeneric(options.Generic{k: v}))
}
}
if c.NetworkSettings.Service != nil {
svcCfg := c.NetworkSettings.Service
var vip string
if svcCfg.VirtualAddresses[n.ID()] != nil {
vip = svcCfg.VirtualAddresses[n.ID()].IPv4
}
var portConfigs []*libnetwork.PortConfig
for _, portConfig := range svcCfg.ExposedPorts {
portConfigs = append(portConfigs, &libnetwork.PortConfig{
Name: portConfig.Name,
Protocol: libnetwork.PortConfig_Protocol(portConfig.Protocol),
TargetPort: portConfig.TargetPort,
PublishedPort: portConfig.PublishedPort,
})
}
createOptions = append(createOptions, libnetwork.CreateOptionService(svcCfg.Name, svcCfg.ID, net.ParseIP(vip), portConfigs, svcCfg.Aliases[n.ID()]))
}
if !containertypes.NetworkMode(n.Name()).IsUserDefined() {
createOptions = append(createOptions, libnetwork.CreateOptionDisableResolution())
}
// configs that are applicable only for the endpoint in the network
// to which container was connected to on docker run.
// Ideally all these network-specific endpoint configurations must be moved under
// container.NetworkSettings.Networks[n.Name()]
if n.Name() == c.HostConfig.NetworkMode.NetworkName() ||
(n.Name() == defaultNetName && c.HostConfig.NetworkMode.IsDefault()) {
if c.Config.MacAddress != "" {
mac, err := net.ParseMAC(c.Config.MacAddress)
if err != nil {
return nil, err
}
genericOption := options.Generic{
netlabel.MacAddress: mac,
}
createOptions = append(createOptions, libnetwork.EndpointOptionGeneric(genericOption))
}
}
// Port-mapping rules belong to the container & applicable only to non-internal networks
portmaps := getSandboxPortMapInfo(sb)
if n.Info().Internal() || len(portmaps) > 0 {
return createOptions, nil
}
if c.HostConfig.PortBindings != nil {
for p, b := range c.HostConfig.PortBindings {
bindings[p] = []nat.PortBinding{}
for _, bb := range b {
bindings[p] = append(bindings[p], nat.PortBinding{
HostIP: bb.HostIP,
HostPort: bb.HostPort,
})
}
}
}
portSpecs := c.Config.ExposedPorts
ports := make([]nat.Port, len(portSpecs))
var i int
for p := range portSpecs {
ports[i] = p
i++
}
nat.SortPortMap(ports, bindings)
for _, port := range ports {
expose := networktypes.TransportPort{}
expose.Proto = networktypes.ParseProtocol(port.Proto())
expose.Port = uint16(port.Int())
exposeList = append(exposeList, expose)
pb := networktypes.PortBinding{Port: expose.Port, Proto: expose.Proto}
binding := bindings[port]
for i := 0; i < len(binding); i++ {
pbCopy := pb.GetCopy()
newP, err := nat.NewPort(nat.SplitProtoPort(binding[i].HostPort))
var portStart, portEnd int
if err == nil {
portStart, portEnd, err = newP.Range()
}
if err != nil {
return nil, errors.Wrapf(err, "Error parsing HostPort value (%s)", binding[i].HostPort)
}
pbCopy.HostPort = uint16(portStart)
pbCopy.HostPortEnd = uint16(portEnd)
pbCopy.HostIP = net.ParseIP(binding[i].HostIP)
pbList = append(pbList, pbCopy)
}
if c.HostConfig.PublishAllPorts && len(binding) == 0 {
pbList = append(pbList, pb)
}
}
var dns []string
if len(c.HostConfig.DNS) > 0 {
dns = c.HostConfig.DNS
} else if len(daemonDNS) > 0 {
dns = daemonDNS
}
if len(dns) > 0 {
createOptions = append(createOptions,
libnetwork.CreateOptionDNS(dns))
}
createOptions = append(createOptions,
libnetwork.CreateOptionPortMapping(pbList),
libnetwork.CreateOptionExposedPorts(exposeList))
return createOptions, nil
}
// getSandboxPortMapInfo retrieves the current port-mapping programmed for the given sandbox
func getSandboxPortMapInfo(sb libnetwork.Sandbox) nat.PortMap {
pm := nat.PortMap{}
if sb == nil {
return pm
}
for _, ep := range sb.Endpoints() {
pm, _ = getEndpointPortMapInfo(ep)
if len(pm) > 0 {
break
}
}
return pm
}
func getEndpointPortMapInfo(ep libnetwork.Endpoint) (nat.PortMap, error) {
pm := nat.PortMap{}
driverInfo, err := ep.DriverInfo()
if err != nil {
return pm, err
}
if driverInfo == nil {
// It is not an error for epInfo to be nil
return pm, nil
}
if expData, ok := driverInfo[netlabel.ExposedPorts]; ok {
if exposedPorts, ok := expData.([]networktypes.TransportPort); ok {
for _, tp := range exposedPorts {
natPort, err := nat.NewPort(tp.Proto.String(), strconv.Itoa(int(tp.Port)))
if err != nil {
return pm, fmt.Errorf("Error parsing Port value(%v):%v", tp.Port, err)
}
pm[natPort] = nil
}
}