Juju sockets proof-of-concept

README.md

This is a proof of concept demonstrating local socket communication with Juju using generally available command line utilities and commands from a remote shell via 'juju ssh' or 'juju run'.

main.go

package main

import (
	"fmt"
	"log"
	"net"
	"time"

	"github.com/juju/juju/juju/sockets"
)

func main() {
	l, err := sockets.Listen(socketPath)
	if err != nil {
		panic(err)
	}
	log.Println("listening on:", socketPath)
	for {
		c, err := l.Accept()
		if err != nil {
			panic(err)
		}
		handle(c)
	}
}

func handle(c net.Conn) {
	defer c.Close()
	err := c.SetDeadline(time.Now().Add(3 * time.Second))
	if err != nil {
		log.Printf("failed to set deadline: %v", err)
		return
	}
	_, err = fmt.Fprintf(c, "%v\n", time.Now())
	if err != nil {
		log.Printf("failed to write response: %v", err)
		return
	}
	log.Println("ok")
}

main_unix.go

// +build !windows

package main

var socketPath = "/var/tmp/socky.sock"

main_windows.go

// +build windows

package main

var socketPath = `\\.\pipe\socky`