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Add an extra veth interface to Docker
package main
import (
"fmt"
"log"
"net"
"github.com/milosgajdos83/tenus"
)
func main() {
// CREATE BRIDGE AND BRING IT UP
br, err := tenus.NewBridgeWithName("vethbridge")
if err != nil {
log.Fatal(err)
}
brIp, brIpNet, err := net.ParseCIDR("10.0.41.1/16")
if err != nil {
log.Fatal(err)
}
if err := br.SetLinkIp(brIp, brIpNet); err != nil {
fmt.Println(err)
}
if err = br.SetLinkUp(); err != nil {
fmt.Println(err)
}
// CREATE VETH PAIR
veth, err := tenus.NewVethPairWithOptions("myveth01", tenus.VethOptions{PeerName: "myveth02"})
if err != nil {
log.Fatal(err)
}
// ASSIGN IP ADDRESS TO THE HOST VETH INTERFACE
vethHostIp, vethHostIpNet, err := net.ParseCIDR("10.0.41.2/16")
if err != nil {
log.Fatal(err)
}
if err := veth.SetLinkIp(vethHostIp, vethHostIpNet); err != nil {
fmt.Println(err)
}
// ADD MYVETH01 INTERFACE TO THE MYBRIDGE BRIDGE
myveth01, err := net.InterfaceByName("myveth01")
if err != nil {
log.Fatal(err)
}
if err = br.AddSlaveIfc(myveth01); err != nil {
fmt.Println(err)
}
if err = veth.SetLinkUp(); err != nil {
fmt.Println(err)
}
// PASS VETH PEER INTERFACE TO A RUNNING DOCKER BY PID
pid, err := tenus.DockerPidByName("vethdckr", "/var/run/docker.sock")
if err != nil {
fmt.Println(err)
}
if err := veth.SetPeerLinkNsPid(pid); err != nil {
log.Fatal(err)
}
// ALLOCATE AND SET IP FOR THE NEW DOCKER INTERFACE
vethGuestIp, vethGuestIpNet, err := net.ParseCIDR("10.0.41.5/16")
if err != nil {
log.Fatal(err)
}
if err := veth.SetPeerLinkNetInNs(pid, vethGuestIp, vethGuestIpNet, nil); err != nil {
log.Fatal(err)
}
}
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