The elements that are included in ubuntu cloud architecture are:

1. Cloud controller: it is the main controller that controls the communication between two nodes and allows the system to communicate with each other.

2. Walrus Storage controller: It controls the storage of the data and resource at one place for easy access.

3. Elastic block storage controller: it uses the elasticity concept and allow the resources to scale up as the demand rises. This block consists of dynamic resources.

4. Cluster controller: it controls the cloud clusters which are made up of mady nodes and contains the configuration of all the nodes from a single point.

5. Node controller: it consists of the hardware resources that is being provided to the web or to the user through cluster controller.