While containerizing an existing application, a DevOps engineer needs to guarantee that the application container and its accompanying logging sidecar always start, stop, and scale together on the same Kubernetes node, sharing an IP address and storage volumes. Which Kubernetes object should she define to meet this requirement?
A Pod that groups the containers and their shared resources
A Service that exposes the containers on a stable virtual IP
A Namespace that isolates resources and access controls within the cluster
A Deployment that manages desired replica counts for stateless microservices
The correct choice is a Pod. In Kubernetes, a Pod is the smallest deployable unit and can encapsulate one or more tightly coupled containers that share the same network namespace and any mounted volumes, ensuring they always run together. A Service only exposes a stable network endpoint, a Deployment maintains the desired replica count and updates for Pods, and a Namespace serves as a logical cluster partition for resource isolation.
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What is the difference between a Pod and a container in Kubernetes?
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Can a Pod contain more than one container, and why might this be useful?