úlfurinn
I’m a big fan of AMQP, it’s the current hammer solution to all my nails problems.
I’m developing a personal convention in my projects of having a push hook to automatically deploy the published branch. Instead of dealing with user privileges to let the hook process touch the application directory, I run a small daemon that subscribes to a message queue, and the hook does nothing except sending a message.
My current setup involves simply using the default direct exchange.
The hook then becomes:
EM.run do
connection = AMQP.connect(host: 'my.broker.host',
vhost: '/my-vhost',
user: 'my-user',
password: 'my-password')
channel = AMQP::Channel.new connection
ex = channel.direct ""
ex.publish '{"action":"generate"}', routing_key: "my-project" do
connection.disconnect { EM.stop }
end
end
And the daemon
$0 = "My project generator"
Dir.chdir "/var/www/my-project"
Dante.run "my-project", pid_path: '/var/www/my-project-generator.pid', user: 'www-data', group: 'www-data' do
EM.run do
connection = AMQP.connect host: "my.broker.host", vhost: "/my-vhost", user: "my-user", password: "my-password"
channel = AMQP::Channel.new connection
queue = channel.queue "my-project", auto_delete: true
queue.subscribe do |payload|
message = Oj.load payload
case message["action"]
when "generate"
`my-deploy-script`
end
end
end
end
Dante daemons are started like so:
sudo /var/www/my-project-generator.rb -d
See gist for full code.