a740cd779e
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
34 lines
962 B
Go
34 lines
962 B
Go
package network
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"syscall"
|
|
|
|
"github.com/dotcloud/docker/pkg/libcontainer"
|
|
"github.com/dotcloud/docker/pkg/system"
|
|
)
|
|
|
|
// crosbymichael: could make a network strategy that instead of returning veth pair names it returns a pid to an existing network namespace
|
|
type NetNS struct {
|
|
}
|
|
|
|
func (v *NetNS) Create(n *libcontainer.Network, nspid int, context libcontainer.Context) error {
|
|
context["nspath"] = n.Context["nspath"]
|
|
return nil
|
|
}
|
|
|
|
func (v *NetNS) Initialize(config *libcontainer.Network, context libcontainer.Context) error {
|
|
nspath, exists := context["nspath"]
|
|
if !exists {
|
|
return fmt.Errorf("nspath does not exist in network context")
|
|
}
|
|
f, err := os.OpenFile(nspath, os.O_RDONLY, 0)
|
|
if err != nil {
|
|
return fmt.Errorf("failed get network namespace fd: %v", err)
|
|
}
|
|
if err := system.Setns(f.Fd(), syscall.CLONE_NEWNET); err != nil {
|
|
return fmt.Errorf("failed to setns current network namespace: %v", err)
|
|
}
|
|
return nil
|
|
}
|