pivotal-cf/rabbit-example-app

Name: rabbit-example-app

Owner: Pivotal Cloud Foundry

Description: Example app to demonstrate how HAProxy reroutes traffic when a node fails

Created: 2015-02-18 15:05:39.0

Updated: 2018-05-22 15:20:18.0

Pushed: 2018-05-22 15:20:16.0

Homepage: null

Size: 5220

Language: Ruby

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README

Installation

Inside the app repository, run the following commands:

 push test-app
 bind-service test-app my_rabbitmq_service
 restage test-app

Development

Install dependencies and run all the specs:

le --local
le exec rspec

The Guard runner is provided for faster feedback from the specs:

le exec guard

Usage

To write messages to the queue:

://test-app.<YOUR_DOMAIN>/write

To read messages from the queue:

://test-app.<YOUR_DOMAIN>/read

While the write and read endpoints will open a websocket, the store endpoint allows you to write and read single messages using HTTP POST and GET requests. For example:

 -XPOST -d 'test' http://test-app.<YOUR-DOMAIN>/store

 -XGET http://test-app.<YOUR-DOMAIN>/store

The queues endpoint allows writing and reading single messages to and from a specific queue using HTTP POST and GET requests:

 -XPOST -d 'test' http://test-app.<YOUR-DOMAIN>/queues/<YOUR-QUEUE-NAME>

 -XGET http://test-app.<YOUR-DOMAIN>/queues/<YOUR-QUEUE-NAME>

If you haveHAProxy allows HTTPS traffic only enabled in CloudFoundry, then

• Replace http with https with http in the above mentioned URL's.
• Ensure you have a rule on your LoadBalancer (or HAProxy), which forwards secure TCP from port 4443 to TCP on port 80.

Demonstration

• Open the URLs to read and write in separate browser tabs, side by side.
• You will see messages being sent & received
• Identify the HAProxy that the writing app is connected to from the IP in the bold color coded URI string
• Using BOSH you can bosh stop rabbitmq-haproxy-partition-default_az_guid <index>
• Observe the writing application fail and then automatically reconnect and continue sending messages
• You could also bosh stop rabbitmq-server-partition-default_az_guid <index> to simulate a RabbitMQ node failing

License

Released under the Apache 2.0 license

(c) 2015, Pivotal Software