Why Cloud Native?

The expression ā€œCloud Nativeā€ represents a modern way of running online services using cloud infrastructure, containers, and orchestration, all powered by the amazing worldwide ecosystem of Open Source software.

TheĀ Cloud Native Computing Foundation, itself part of the largerĀ Linux Foundation, has thisĀ main goal:

The Foundation’s mission is to make cloud native computing ubiquitous. The CNCF Cloud Native Definition v1.0 says:

Cloud native technologies empower organizations to build and run scalable applications in modern, dynamic environments such as public, private, and hybrid clouds. Containers, service meshes, microservices, immutable infrastructure, and declarative APIs exemplify this approach.

But what does ā€œCloud Nativeā€ mean? In this context, the word ā€œCloudā€ doesn’t necessarily mean ā€œhyperscalerā€ (that is, AWS, Google Cloud, Azure, or others). Many organizations have their internal cloud infrastructure and use the Cloud Native principles to deploy new innovative services following the DevOps philosophy.

Cloud-Native Apps

A Cloud-Native application follows a fewĀ distinctive characteristics:

  • It isĀ automatable; applications are standardized in such a way that they are tested, deployed, and to a certain degree managed automatically by machines. This goal is largely achieved throughĀ Kubernetes.
  • It isĀ flexible; containerized applications can be executed without any changes in various environments, from a small laptop to the largest hyperscalers.
  • It isĀ resilient and scalable; Cloud Native applications are highly available, thanks to redundancy, graceful degradation, and continuous monitoring.
  • It isĀ dynamic; applications can scale up and down automatically, following the demand of users, and also respecting budgets and capacity plans.
  • It isĀ observable; so that applications report all telemetry data required to monitor their functionality in real-time, allowing teams to react proactively to issues and plan capacity and costs.
  • It isĀ distributed; applications are no longer deployed as monolithic instances, but rather as a network of cooperative microservices.

Well-designed Cloud-Native applications require a careful design of their microservices, with clear boundaries of responsibility and quality metrics, usually matching the structure of the organization creating them, followingĀ Conway’s Law.

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