104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
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package network
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import (
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"fmt"
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"github.com/dotcloud/docker/pkg/libcontainer"
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"github.com/dotcloud/docker/pkg/libcontainer/utils"
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"log"
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)
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type Veth struct {
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}
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func (v *Veth) Create(n *libcontainer.Network, nspid int) (libcontainer.Context, error) {
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log.Printf("creating veth network")
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var (
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bridge string
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prefix string
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exists bool
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)
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if bridge, exists = n.Context["bridge"]; !exists {
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return nil, fmt.Errorf("bridge does not exist in network context")
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}
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if prefix, exists = n.Context["prefix"]; !exists {
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return nil, fmt.Errorf("veth prefix does not exist in network context")
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}
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name1, name2, err := createVethPair(prefix)
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if err != nil {
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return nil, err
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}
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context := libcontainer.Context{
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"vethHost": name1,
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"vethChild": name2,
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}
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log.Printf("veth pair created %s <> %s", name1, name2)
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if err := SetInterfaceMaster(name1, bridge); err != nil {
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return context, err
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}
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if err := SetMtu(name1, n.Mtu); err != nil {
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return context, err
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}
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if err := InterfaceUp(name1); err != nil {
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return context, err
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}
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log.Printf("setting %s inside %d namespace", name2, nspid)
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if err := SetInterfaceInNamespacePid(name2, nspid); err != nil {
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return context, err
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}
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return context, nil
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}
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func (v *Veth) Initialize(config *libcontainer.Network, context libcontainer.Context) error {
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var (
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vethChild string
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exists bool
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)
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if vethChild, exists = context["vethChild"]; !exists {
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return fmt.Errorf("vethChild does not exist in network context")
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}
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if err := InterfaceDown(vethChild); err != nil {
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return fmt.Errorf("interface down %s %s", vethChild, err)
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}
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if err := ChangeInterfaceName(vethChild, "eth0"); err != nil {
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return fmt.Errorf("change %s to eth0 %s", vethChild, err)
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}
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if err := SetInterfaceIp("eth0", config.Address); err != nil {
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return fmt.Errorf("set eth0 ip %s", err)
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}
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if err := SetMtu("eth0", config.Mtu); err != nil {
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return fmt.Errorf("set eth0 mtu to %d %s", config.Mtu, err)
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}
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if err := InterfaceUp("eth0"); err != nil {
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return fmt.Errorf("eth0 up %s", err)
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}
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if err := SetMtu("lo", config.Mtu); err != nil {
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return fmt.Errorf("set lo mtu to %d %s", config.Mtu, err)
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}
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if err := InterfaceUp("lo"); err != nil {
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return fmt.Errorf("lo up %s", err)
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}
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if config.Gateway != "" {
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if err := SetDefaultGateway(config.Gateway); err != nil {
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return fmt.Errorf("set gateway to %s %s", config.Gateway, err)
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}
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}
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return nil
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}
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// createVethPair will automatically generage two random names for
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// the veth pair and ensure that they have been created
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func createVethPair(prefix string) (name1 string, name2 string, err error) {
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name1, err = utils.GenerateRandomName(prefix, 4)
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if err != nil {
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return
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}
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name2, err = utils.GenerateRandomName(prefix, 4)
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if err != nil {
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return
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}
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if err = CreateVethPair(name1, name2); err != nil {
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return
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}
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return
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}
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