Cocaine (Configurable Omnipotent Custom Applications Integrated Network Engine) was an open-source PaaS system for creating custom cloud hosting apps that are similar to Bluemix, Google App Engine, or Heroku.

[1] Andrey Sibiryov, the original developer of Cocaine, got the idea from Heroku, another cloud PaaS.

This changed, however, when Yandex discovered an internal need for a scalable platform that could cope with millions of requests-per-second (RPS).

There are services that do this, which from the programmer's point of view are native modules for the programming language the code is written in.

Additionally, apps are tested in isolated cloud environments, preventing errors from affecting the physical system or other applications.