DIAMOND ⋄

Runlevels for your web application

Diamond provides a UNIX socket for administrators to gracefully shutdown an application, such as a web server.

Apart from only shutting down, the admin can change gears, triggering functions and killing/starting listeners.

The "KICK" feature allows upgrading a program with minimal downtime, kicking the old running process gracefully.

If diamond-admin doesn't run on your platform (bsd?) you can still use the client library!

⚡ telinit 3

Using diamond-admin

You can open admin interface by using no arguments:

diamond-admin -s diamond.sock

Start all listeners and http servers

diamond-admin -s diamond.sock RUNLEVEL 3

Stop all listeners, cut http connections

diamond-admin -s diamond.sock RUNLEVEL 1

Using the library

Diamond requires a recent version of Go

// New creates a new admin socket and starts listening for commands
s, err := diamond.New("/tmp/diamond.socket")
if err != nil {
    log.Fatalln(err)
}

// Add variety of http handlers and their addr to listen on
// They won't start listening right away, so they could be
// occupied by other servers
s.AddHTTPHandler(":8080", http.HandlerFunc(myHandler))
s.AddHTTPHandler(":8081", http.HandlerFunc(handler2))
s.AddHTTPHandler(":8082", handler3)

// start in multiuser mode, serving http
// without calling Runlevel(3) you must
// connect via socket and issue the RUNLEVEL 3 command
s.Runlevel(3) 

// serve forever
log.Fatalln(s.Wait())

See the examples

Read more:

aerth.github.io/diamond

github.com/aerth/diamond

CAUTION

API may change without notice! (it already has two times!)

Contributing

Submit new issue or pull request

Old version

import "gopkg.in/aerth/diamond.v1"