# README

ZeroDT

Package ZeroDT offers a zero downtime restart and a graceful shutdown for HTTP servers. Key features:

supported both stateless and stateful servers
compatible with systemd's socket activation
based on out-of-the-box http.Server
work with any number of servers
not a framework

Example

The simplest way to use ZeroDT is to pass your http.Server to the zerodt.NewApp function and call zerodt.ListenAndServe for an object it returns:

package main

import (
    "io"
    "net/http"
    "time"

    "github.com/ssgreg/zerodt"
)

func hello(w http.ResponseWriter, r *http.Request) {
    io.WriteString(w, "Hello world!")
}

func main() {
    mux := http.NewServeMux()
    mux.HandleFunc("/", hello)

    a := zerodt.NewApp(&http.Server{Addr: ":8081", Handler: mux})
    a.ListenAndServe()
}