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moby--moby/daemon/network.go
Alessandro Boch 6eb2b903a3 Docker changes for libnetwork vendoring b66c038
Signed-off-by: Alessandro Boch <aboch@docker.com>
2016-05-16 15:04:01 -07:00

243 lines
7 KiB
Go

package daemon
import (
"fmt"
"net"
"strings"
netsettings "github.com/docker/docker/daemon/network"
"github.com/docker/docker/errors"
"github.com/docker/docker/runconfig"
"github.com/docker/engine-api/types"
"github.com/docker/engine-api/types/filters"
"github.com/docker/engine-api/types/network"
"github.com/docker/libnetwork"
)
// 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
}
// FindNetwork function finds a network for a given string that can represent network name or id
func (daemon *Daemon) FindNetwork(idName string) (libnetwork.Network, error) {
// Find by Name
n, err := daemon.GetNetworkByName(idName)
if err != nil && !isNoSuchNetworkError(err) {
return nil, err
}
if n != nil {
return n, nil
}
// Find by id
return daemon.GetNetworkByID(idName)
}
func isNoSuchNetworkError(err error) bool {
_, ok := err.(libnetwork.ErrNoSuchNetwork)
return ok
}
// GetNetworkByID function returns a network whose ID begins with the given prefix.
// It fails with an error if no matching, or more than one matching, networks are found.
func (daemon *Daemon) GetNetworkByID(partialID string) (libnetwork.Network, error) {
list := daemon.GetNetworksByID(partialID)
if len(list) == 0 {
return nil, libnetwork.ErrNoSuchNetwork(partialID)
}
if len(list) > 1 {
return nil, libnetwork.ErrInvalidID(partialID)
}
return list[0], nil
}
// GetNetworkByName function returns a network for a given network name.
func (daemon *Daemon) GetNetworkByName(name string) (libnetwork.Network, error) {
c := daemon.netController
if name == "" {
name = c.Config().Daemon.DefaultNetwork
}
return c.NetworkByName(name)
}
// GetNetworksByID returns a list of networks whose ID partially matches zero or more networks
func (daemon *Daemon) GetNetworksByID(partialID string) []libnetwork.Network {
c := daemon.netController
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
list := []libnetwork.Network{}
l := func(nw libnetwork.Network) bool {
list = append(list, nw)
return false
}
c.WalkNetworks(l)
return list
}
// CreateNetwork creates a network with the given name, driver and other optional parameters
func (daemon *Daemon) CreateNetwork(create types.NetworkCreateRequest) (*types.NetworkCreateResponse, error) {
if runconfig.IsPreDefinedNetwork(create.Name) {
err := fmt.Errorf("%s is a pre-defined network and cannot be created", create.Name)
return nil, errors.NewRequestForbiddenError(err)
}
var warning string
nw, err := daemon.GetNetworkByName(create.Name)
if err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
return nil, err
}
}
if nw != nil {
if create.CheckDuplicate {
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
}
ipam := create.IPAM
v4Conf, v6Conf, err := getIpamConfig(ipam.Config)
if err != nil {
return nil, err
}
nwOptions := []libnetwork.NetworkOption{
libnetwork.NetworkOptionIpam(ipam.Driver, "", v4Conf, v6Conf, ipam.Options),
libnetwork.NetworkOptionEnableIPv6(create.EnableIPv6),
libnetwork.NetworkOptionDriverOpts(create.Options),
libnetwork.NetworkOptionLabels(create.Labels),
}
if create.Internal {
nwOptions = append(nwOptions, libnetwork.NetworkOptionInternalNetwork())
}
n, err := c.NewNetwork(driver, create.Name, "", nwOptions...)
if err != nil {
return nil, err
}
daemon.LogNetworkEvent(n, "create")
return &types.NetworkCreateResponse{
ID: n.ID(),
Warning: warning,
}, nil
}
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
}
// 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 {
container, err := daemon.GetContainer(containerName)
if err != nil {
return err
}
return daemon.ConnectToNetwork(container, 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, network libnetwork.Network, force bool) error {
container, err := daemon.GetContainer(containerName)
if err != nil {
if force {
return daemon.ForceEndpointDelete(containerName, network)
}
return err
}
return daemon.DisconnectFromNetwork(container, network, force)
}
// GetNetworkDriverList returns the list of plugins drivers
// registered for network.
func (daemon *Daemon) GetNetworkDriverList() map[string]bool {
pluginList := make(map[string]bool)
if !daemon.NetworkControllerEnabled() {
return nil
}
c := daemon.netController
networks := c.Networks()
for _, network := range networks {
driver := network.Type()
pluginList[driver] = true
}
return pluginList
}
// DeleteNetwork destroys a network unless it's one of docker's predefined networks.
func (daemon *Daemon) DeleteNetwork(networkID string) error {
nw, err := daemon.FindNetwork(networkID)
if err != nil {
return err
}
if runconfig.IsPreDefinedNetwork(nw.Name()) {
err := fmt.Errorf("%s is a pre-defined network and cannot be removed", nw.Name())
return errors.NewRequestForbiddenError(err)
}
if err := nw.Delete(); err != nil {
return err
}
daemon.LogNetworkEvent(nw, "destroy")
return nil
}
// FilterNetworks returns a list of networks filtered by the given arguments.
// It returns an error if the filters are not included in the list of accepted filters.
func (daemon *Daemon) FilterNetworks(netFilters filters.Args) ([]libnetwork.Network, error) {
if netFilters.Len() != 0 {
if err := netFilters.Validate(netsettings.AcceptedFilters); err != nil {
return nil, err
}
}
nwList := daemon.getAllNetworks()
return netsettings.FilterNetworks(nwList, netFilters)
}