Why would you deploy Cloud Foundry on OpenStack rather than only using OpenStack?

When setting up a scalable and high available web application on OpenStack you usually care about the following things:

  • Create a couple of virtual machines
  • Install multiple instances of the web application on different virtual machines. They must run on different machines since you want to have a failover instance in case one virtual machine crashes.
  • Install and configure a load balancer that monitors the instances of the web application and distributes load to working application instances.
  • Usually the web application depends on other services like databases, message queues.. Those services must be installed and configured so that they are high available as well
  • You must ensure that all your software components are up to date (update operation system, application dependencies, the application itself, the databases, …)
  • Adding additional instances of the web application is hard because you have to create a new virtual machine install the web application by hand and reconfigure the load balancer so that the load balancer knows about the new application instance.
  • In case one application instance fails, you must repair it by hand.

using Cloud Foundry deploying and scaling different kind of web applications is very simple. Using Cloud Foundry the actions mentioned above are automated.

  • Just upload the application source code with one command, Cloud Foundry will detect which kind of application is deployed and will install all dependencies automatically.
  • Adding or removing application instances is also just one command.
  • Further, Cloud Foundry will share its available servers to multiple applications.

Author: Aditya Bhuyan

I am an IT Professional with close to two decades of experience. I mostly work in open source application development and cloud technologies. I have expertise in Java, Spring and Cloud Foundry.

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