There are four phases that basically gets involved in the cloud architecture:
1. Launch phase: it launches the basic services and makes the system ready for communication and for application building
2. Monitor phase: it monitors the services that is being launched and then manages them so that on demand the user will be able to get what he wants.
3. Shutdown phase: it shutdown the services that are not required first and after all the services gets shutdown, and then it closes the system services.
4. Cleanup phase: it clean up the left out processes and services that is being either broken or didn’t get shutdown correctly.