README

GO_REUSEPORT

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GO_REUSEPORT is a little expirement to create a net.Listener that supports SO_REUSEPORT socket option.

For now, Darwin and Linux (from 3.9) systems are supported. I'll be pleased if you'll test other systems and tell me the results. documentation on godoc.org.

Example

package main

import (
  "fmt"
  "html"
  "net/http"
  "os"
  "runtime"
  "github.com/kavu/go_reuseport"
)

func main() {
  listener, err := reuseport.Listen("tcp", "localhost:8881")
  if err != nil {
    panic(err)
  }
  defer listener.Close()

  server := &http.Server{}
  http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    fmt.Println(os.Getgid())
    fmt.Fprintf(w, "Hello, %q\n", html.EscapeString(r.URL.Path))
  })

  panic(server.Serve(listener))
}

Now you can run several instances of this tiny server without Address already in use errors.

Thanks

Inspired by Artur Siekielski post about SO_REUSEPORT.

Documentation

Overview

    Package reuseport provides a function that returns a net.Listener powered by a net.FileListener with a SO_REUSEPORT option set to the socket.

    Index

    Examples

    Constants

    This section is empty.

    Variables

    This section is empty.

    Functions

    func Listen

    func Listen(proto, addr string) (l net.Listener, err error)

      Listen function is an alias for NewReusablePortListener.

      func ListenPacket

      func ListenPacket(proto, addr string) (l net.PacketConn, err error)

        ListenPacket is an alias for NewReusablePortPacketConn.

        func NewReusablePortListener

        func NewReusablePortListener(proto, addr string) (l net.Listener, err error)

          NewReusablePortListener returns net.FileListener that created from a file discriptor for a socket with SO_REUSEPORT option.

          Example
          Output:
          
          

          func NewReusablePortPacketConn

          func NewReusablePortPacketConn(proto, addr string) (l net.PacketConn, err error)

            NewReusablePortPacketConn returns net.FilePacketConn that created from a file discriptor for a socket with SO_REUSEPORT option.

            Types

            This section is empty.