How to run heroku restart from inside of a rails app?

Question

I understand that from the console I can run heroku restart . What I'd like to do is to have a button in my app (admin console), where pushing that button runs a heroku restart . Does anyone know how to do that and if it's possible? So the code would look something like this:

<button id="heroku_restart">Restart</button>

$("#heroku_restart").click(function() {
    $.post('/restart', {}).done(function(response) {
        alert(response)
    })
})

class AdminsController

    # this is the action mapped to the route /restart
    def restart 
        # code for heroku restart
    end
end

Answer 1

So per @vpibano, as of this writing, doing it with the platform-api is a breeze. Here's the action POSTed to by a button on my website:

def restart
    heroku = PlatformAPI.connect_oauth(ENV["heroku_oauth_token"]) 
    heroku.dyno.restart_all("lastmingear")
    render nothing: true
end

Answer 2

As per the description mentioned in the post, the one way of doing it is :

1) First locate the server.pid file

pid_file = Rails.root.join("tmp", "pids", "server.opid")

2) Now, truncate the contents of the file

File.open(pid_file, "w") {|f| f.truncate(0)}

3) Finally, run the server using Kernel module:

Kernel.exec("rails s")

Note: As rightly, mentioned by @vpibano you will need authentication to access your app.

This is not a working model but a way to achieve the requirement.

Hope it helps!!