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Fix issue #4681 - No loopback interface within container when networking is disabled.

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Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion)

Remove loopback code from veth strategy

Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion)

Looback strategy: Get rid of uneeded code in Create
Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion)

Use append when building network strategy list

Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion)

Swap loopback and veth strategies in Networks list

Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion)

Revert "Swap loopback and veth strategies in Networks list"

This reverts commit 3b8b2c8454171d79bed5e9a80165172617e92fc7.

Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion)

When initializing networks, only return from the loop if there is an error

Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion)
This commit is contained in:
Timothy Hobbs 2014-03-16 01:01:31 +01:00
parent dce2f20bec
commit 1cad0a1d6c
4 changed files with 31 additions and 8 deletions
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24
libcontainer/network/loopback.go Normal file
View file

@ -0,0 +1,24 @@
package network
import (
"fmt"
"github.com/dotcloud/docker/pkg/libcontainer"
)
// Loopback is a network strategy that provides a basic loopback device
type Loopback struct {
}
func (l *Loopback) Create(n *libcontainer.Network, nspid int, context libcontainer.Context) error {
return nil
}
func (l *Loopback) Initialize(config *libcontainer.Network, context libcontainer.Context) error {
if err := SetMtu("lo", config.Mtu); err != nil {
return fmt.Errorf("set lo mtu to %d %s", config.Mtu, err)
}
if err := InterfaceUp("lo"); err != nil {
return fmt.Errorf("lo up %s", err)
}
return nil
}

1
libcontainer/network/strategy.go
View file

@ -11,6 +11,7 @@ var (
var strategies = map[string]NetworkStrategy{ var strategies = map[string]NetworkStrategy{
"veth": &Veth{}, "veth": &Veth{},
"loopback": &Loopback{},
} }
// NetworkStrategy represents a specific network configuration for // NetworkStrategy represents a specific network configuration for

6
libcontainer/network/veth.go
View file

@ -68,12 +68,6 @@ func (v *Veth) Initialize(config *libcontainer.Network, context libcontainer.Con
if err := InterfaceUp("eth0"); err != nil { if err := InterfaceUp("eth0"); err != nil {
return fmt.Errorf("eth0 up %s", err) return fmt.Errorf("eth0 up %s", err)
} }
if err := SetMtu("lo", config.Mtu); err != nil {
return fmt.Errorf("set lo mtu to %d %s", config.Mtu, err)
}
if err := InterfaceUp("lo"); err != nil {
return fmt.Errorf("lo up %s", err)
}
if config.Gateway != "" { if config.Gateway != "" {
if err := SetDefaultGateway(config.Gateway); err != nil { if err := SetDefaultGateway(config.Gateway); err != nil {
return fmt.Errorf("set gateway to %s %s", config.Gateway, err) return fmt.Errorf("set gateway to %s %s", config.Gateway, err)

6
libcontainer/nsinit/init.go
View file

@ -134,7 +134,11 @@ func setupNetwork(container *libcontainer.Container, context libcontainer.Contex
if err != nil { if err != nil {
return err return err
} }
return strategy.Initialize(config, context)
err1 := strategy.Initialize(config, context)
if err1 != nil {
return err1
}
} }
return nil return nil
} }