ztun, err := newZtunnelServer(addr, pods)
	if err != nil {
		panic(err)
	}
	go ztun.Run(ctx)

	// now as a client connect confirm we and get snapshot
	resolvedAddr, err := net.ResolveUnixAddr("unixpacket", addr)
	if err != nil {
		panic(err)
	}
	ztunClient, err := net.DialUnix("unixpacket", nil, resolvedAddr)
	if err != nil {
		panic(err)
	}

	// send hello
	sendHello(ztunClient)

func newZtunnelServer(addr string, pods PodNetnsCache) (*ztunnelServer, error) {
	if addr == "" {
		return nil, fmt.Errorf("addr cannot be empty")
	}

	resolvedAddr, err := net.ResolveUnixAddr("unixpacket", addr)
	if err != nil {
		return nil, fmt.Errorf("failed to resolve unix addr: %w", err)
	}
	// remove potentially existing address