// SetupVeth sets up a virtual ethernet link. // Should be in container netns. func SetupVeth(contVethName string, mtu int, hostNS *os.File) (hostVeth, contVeth netlink.Link, err error) { var hostVethName string hostVethName, contVeth, err = makeVeth(contVethName, mtu) if err != nil { return } if err = netlink.LinkSetUp(contVeth); err != nil { err = fmt.Errorf("failed to set %q up: %v", contVethName, err) return } hostVeth, err = netlink.LinkByName(hostVethName) if err != nil { err = fmt.Errorf("failed to lookup %q: %v", hostVethName, err) return } if err = netlink.LinkSetUp(hostVeth); err != nil { err = fmt.Errorf("failed to set %q up: %v", contVethName, err) return } if err = netlink.LinkSetNsFd(hostVeth, int(hostNS.Fd())); err != nil { err = fmt.Errorf("failed to move veth to host netns: %v", err) return } return }
// SetupVeth sets up a virtual ethernet link. // Should be in container netns. // TODO(eyakubovich): get rid of entropy and ask kernel to pick name via pattern func SetupVeth(entropy, contVethName string, mtu int, hostNS *os.File) (hostVeth, contVeth netlink.Link, err error) { // NetworkManager (recent versions) will ignore veth devices that start with "veth" hostVethName := RandomVethName(entropy) hostVeth, err = makeVeth(hostVethName, contVethName, mtu) if err != nil { err = fmt.Errorf("failed to make veth pair: %v", err) return } if err = netlink.LinkSetUp(hostVeth); err != nil { err = fmt.Errorf("failed to set %q up: %v", hostVethName, err) return } contVeth, err = netlink.LinkByName(contVethName) if err != nil { err = fmt.Errorf("failed to lookup %q: %v", contVethName, err) return } if err = netlink.LinkSetUp(contVeth); err != nil { err = fmt.Errorf("failed to set %q up: %v", contVethName, err) return } if err = netlink.LinkSetNsFd(hostVeth, int(hostNS.Fd())); err != nil { err = fmt.Errorf("failed to move veth to host netns: %v", err) return } return }