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Role of containers

Containerization is an approach to software development in which an application or service, its dependencies, and its configuration (abstracted as deployment manifest files) are packaged together as a container image. You can test the containerized application as a unit, and deploy them as a container image instance to the host Operating System (OS).

Attached below is a screenshot of a host that hosts conatiners, the applications/services are running inside containers(docker containers here) and the containers are running inside Docker which is running on the OS/VM.

Docker: Docker is a set of platform as a service products that use OS-level virtualization to deliver software in packages called containers.

A container is an instance of a docker image.



*Containerizing an application is not the only way to deploy microservices. You could deploy microservices as individual services in Azure App Service, or via virtual machines, or any number of ways but Conatiners is one of the best tools for microservice architectures to be deployed with

  • Another benefit of containerization is scalability. You can scale out quickly by creating new containers for short-term tasks. From an application point of view, instantiating an image (creating a container) is similar to instantiating a process like a service or a web app.



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