Description: A deployment controller is a fundamental component in the Kubernetes ecosystem, especially in the context of container orchestration platforms. Its primary function is to manage the deployment of applications, ensuring that the desired state of applications is maintained over time. This includes creating, updating, and deleting application instances, as well as monitoring their status. Deployment controllers allow developers to define how applications should be deployed, specifying details such as the number of replicas, update strategy, and rollback conditions in case of failures. One of the most notable features of deployment controllers is their ability to perform updates with zero downtime, meaning applications can be continuously updated without interrupting service. Additionally, deployment controllers are responsible for ensuring that the number of running instances matches the desired number, contributing to the high availability and scalability of applications in various environments. In summary, the deployment controller is an essential tool for the efficient management of applications in containerized environments, facilitating the deployment and maintenance of modern applications.
