rack-amqp devops.pdfwhat rack-amqp is: jackalope (rack app server) amqurl (client with curl syntax)...

RACK-AMQPA NEW RUBY WEBAPP SERVER

WhatRack-AMQP is:

jackalope (rack app server)

amqurl (client with curl syntax)

rack-amqp-client (ruby client lib)

AMQParty (ruby client lib, API-compatible with HTTParty)

Demo

WhatRack-AMQP is:

jackalope (rack app server)

amqurl (client with curl syntax)

rack-amqp-client (ruby client lib)

AMQParty (ruby client lib, API-compatible with HTTParty)

Demo

WHY

SOAMany services communicating with each other

Need direct fetch capabilities (GET, POST), also publish-subscribe

HTTP doesn't do pub/sub

We have all this HTTP infrastructure and code already!

We know HTTP

HTTP in your SOA

seems simple, but it's actually complex

Load Balancers

SSL Everywhere

Fixed IPs or hostnames or service locators

Connection setup / teardown

AMQPOpen standard

Allows any system to connect (Ruby, Java, Haskell, whatever)

Secure by default

Everything is a queue

No load balancing

No fixed locations, just queue names

Persistent connection

HOW

Implements AMQP

Robust messaging for applications

Easy to use

Runs on all major operating systems

Supports a huge number of developer platforms

Open source and commercially supported

AMQP Topologies

Simple-enough config

{ssl_options, [{cacertfile, "/path/to/testca/cacert.pem"}, {certfile, "/path/to/server/cert.pem"}, {keyfile, "/path/to/server/key.pem"}, {verify, verify_peer}, {fail_if_no_peer_cert, false}]},

{default_vhost, <<"/">>}, {default_user, <<"guest">>}, {default_pass, <<"guest">>}, {default_permissions, [<<".*">>, <<".*">>, <<".*">>]},

Simple-enough config

{ssl_options, [{cacertfile, "/path/to/testca/cacert.pem"}, {certfile, "/path/to/server/cert.pem"}, {keyfile, "/path/to/server/key.pem"}, {verify, verify_peer}, {fail_if_no_peer_cert, false}]},

{default_vhost, <<"/">>}, {default_user, <<"guest">>}, {default_pass, <<"guest">>}, {default_permissions, [<<".*">>, <<".*">>, <<".*">>]},

SERVER

The common language for ruby web applications

1 class HelloWorld!2 def call(env)!3 [200, {"Content-Type" => "text/plain"}, ["Hello world!"]]!4 end!5 end

The common language for ruby web applications

1 class HelloWorld!2 def call(env)!3 [200, {"Content-Type" => "text/plain"}, ["Hello world!"]]!4 end!5 end

Response Code Headers Body

Rack-AMQP

#!/usr/bin/env ruby!

require "rack/amqp"!

Rack::AMQP::Server.start rackup_file: File.absolute_path(ARGV[0])

rack-amqp/bin/raqup

class Rack::AMQP::Server! def start! ::AMQP.start(host: 'localhost') do |client|! chan = ::AMQP::Channel.new(client)!! chan.queue("test.simple").subscribe do |metadata, payload|! response, headers = handle_request(metadata, payload)!! message_id = metadata.message_id! reply_to = metadata.reply_to!! amqp_headers = {! routing_key: reply_to, correlation_id: message_id,! type: 'REPLY', app_id: server_agent,! timestamp: Time.now.to_i, headers: headers! }! amqp_headers[:content_type] = type if type = headers['Content-Type']! amqp_headers[:content_encoding] = enc if enc = headers['Content-Encoding']!! chan.direct("").publish(response, amqp_headers)! end!! puts "#{server_agent} running"! end! end!end

AMQP

class Rack::AMQP::Server! def handle_request(meta, body)! headers = meta.headers! http_method = meta.type! path = headers['path']!! parts = path.split(/\?/)! uri = parts[0]! query = parts[1] || ""!! env = default_env! env.update({! 'REQUEST_METHOD' => http_method,! 'PATH_INFO' => uri,! 'QUERY_STRING' => query,! 'REQUEST_PATH' => uri,! })!! response_code, headers, body = app.call(env)!! headers.merge!('X-AMQP-HTTP-Status' => response_code)!! body_chunks = []! body.each { |chunk| body_chunks << chunk }! body.close!! [body_chunks.join, headers]! end!end

Rack

NOT FINISHED!

TODO

Test in staging, test in production

Iron-out performance issues

Load test

Support more curl options for amqurl

Allow config file for jackalope

Thanks!Josh Szmajda

@jszmajda

@rubyhangout

CTO, Optoro

We are hiring ;)

http://www.github.com/joshsz/rack-amqp