For greater flexibility, Cloud Native applications are based on a microservice-oriented architecture: services that are independent of each other and that communicate with each other. Thus, the resources for certain services can be scaled up, while others are not, according to need and capacity. The application adapts to use. For example, some applications will require a large number of users. There may be redundancy of services which are purely web accesses, while in other applications, the problem will be elsewhere. The advantage of the microservice is to be able to adapt the load as needed.
The Cloud Native solution offers communications APIs and in particular REST APIs, which allow exchanges with the rest of the world, particularly in the case of exchanges between microservices or f ront-end layers.
It optimizes the flows exchanged. The flows will pass through external networks. Their volume must be minimized to optimize response times and reduce costs.The application should be designed to minimize these costs. For example, on a rich client, very large volumes of data are often retrieved, while the client only needs a few lines. An application intended for a Cloud will attempt to optimize the number of elements transferred by working in the form of a virtual grid.
The application should be designed to be automatically tested and deployed through a continuous integration chain. Manual interventions are limited and deployments can be performed in multi-node mode, in an automated manner. This is the CI/CD approach. This approach is based on modern and dynamic languages that meet the requirements of the Cloud. Beyond the application itself, the tool core must also know how to address the Cloud.
Finally, another feature of the Cloud Native application is the management of the multi-tenant function. As the application is deployed for multiple clients that share its use, it is essential to be able to physically segregate each customer’s data. It is inconceivable to mix data from several customers. In many applications, data separation is purely logical; a simple key separates the data. In the event of an intrusion, the person who will manage to break in will have access to all the data of all the customers. A good cloud application will isolate the data domains of each of the customers. Everything is split and separated physically..