func createVethPair(handle string, wshdPID int, containerIP string, containerIPAddressMask int, containerMTU int) (string, error) {
hostIfName := fmt.Sprintf("o-%s-0", handle)
containerIfName := fmt.Sprintf("o-%s-1", handle)
vethCreator := devices.VethCreator{}
hostIf, containerIf, err := vethCreator.Create(hostIfName, containerIfName)
if err != nil {
if !strings.Contains(err.Error(), "Network interface already exists") {
return "", err
}
hostIf, err = net.InterfaceByName(hostIfName)
if err != nil {
return "", err
}
containerIf, err = net.InterfaceByName(containerIfName)
if err != nil && !strings.Contains(err.Error(), "no such network interface") {
return "", err
}
}
link := devices.Link{}
if containerIf != nil {
err = link.SetNs(containerIf, wshdPID)
if err != nil {
return "", err
}
fmt.Printf("container if: %+v\n", containerIf)
}
if hostIf != nil {
fmt.Printf("host if: %+v\n", hostIf)
}
err = runInNamespace(handle, fmt.Sprintf("ip addr add %s/%d dev %s", containerIP, containerIPAddressMask, containerIfName))
if err != nil && !strings.Contains(err.Error(), "RTNETLINK answers: File exists") {
return "", err
}
err = runInNamespace(handle, fmt.Sprintf("ip link set %s up", containerIfName))
if err != nil {
return "", err
}
err = runInNamespace(handle, fmt.Sprintf("ip link set dev %s mtu %d", containerIfName, containerMTU))
if err != nil {
return "", err
}
return hostIfName, nil
}
package devices_test
import (
"fmt"
"net"
"github.com/cloudfoundry-incubator/garden-linux/network/devices"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("Veth Pair Creation", func() {
var (
v devices.VethCreator
hostName, containerName string
)
f := func(i *net.Interface, _ error) *net.Interface {
return i
}
l := func(_, _ interface{}, e error) error {
return e
}
BeforeEach(func() {
hostName = fmt.Sprintf("doesntexist-h-%d", GinkgoParallelNode())
containerName = fmt.Sprintf("doesntexist-c-%d", GinkgoParallelNode())
})
AfterEach(func() {