Cloud infrastructure consists of servers, storage devices, network, cloud management software, deployment software, and platform virtualization.
Hypervisor is a firmware or low-level program that acts as a Virtual Machine Manager. It allows to share the single physical instance of cloud resources between several tenants.
It helps to maintain and configure the infrastructure.
It helps to deploy and integrate the application on the cloud.
It is the key component of cloud infrastructure. It allows to connect cloud services over the Internet. It is also possible to deliver network as a utility over the Internet, which means, the customer can customize the network route and protocol.
The server helps to compute the resource sharing and offers other services such as resource allocation and de-allocation, monitoring the resources, providing security etc.
Cloud keeps multiple replicas of storage. If one of the storage resources fails, then it can be extracted from another one, which makes cloud computing more reliable.
Fundamental constraints that cloud infrastructure should implement are shown in the following diagram:
Virtualization is the key to share resources in cloud environment. But it is not possible to satisfy the demand with single resource or server. Therefore, there must be transparency in resources, load balancing and application, so that we can scale them on demand.
Scaling up an application delivery solution is not that easy as scaling up an application because it involves configuration overhead or even re-architecting the network. So, application delivery solution is need to be scalable which will require the virtual infrastructure such that resource can be provisioned and de-provisioned easily.
To achieve transparency and scalability, application solution delivery will need to be capable of intelligent monitoring.
The mega data center in the cloud should be securely architected. Also the control node, an entry point in mega data center, also needs to be secure.