Are there any restrictions for applications running on Cloud Foundry?

The restrictions for applications running on Cloud Foundry are the following.

(1) Applications should be written in the languages supported by the platform. Please refer to service descriptions for further information. Applications written in other languages can also be run by using Buildpacks or Docker images.

(2) Applications should be web applications. Inbound traffic should be only http(s). Outbound traffic is unrestricted.

(3) No permanent data write-ins are available on local disks. You can use them for logs or temporary work space. It's because changing the number of instances or switching instances are considered to be normal operations.

(4) Round robin is the only available load balancing method. Please be careful of the method of session management.