What is a container registry, and why is it used in deployments?

What is a container registry, and why is it used in deployments?

• A. Provides real-time logging for container workloads.
• B. Stores, versions, and distributes container images; enables trusted pulls via signing and access controls.
• C. Runs containerized apps directly from source code without images.
• D. Provides version control for container images with access control.

Answer: (B)

A container registry is a centralized place to store built container images, keep track of their versions, and distribute them to environments during deployment. When you build an image, you push it to the registry with a tag and a digest; during deployment, the orchestrator pulls that exact image so every instance runs the same code, ensuring consistent, reproducible deployments. Security features like image signing and access controls let you verify the image hasn’t been tampered with and control who can push or pull images, which is essential in production. This combination of storage, versioning, distribution, and trust is why registries are used in deployments. Real-time logging, running apps directly from source code, and separate version control for images describe other aspects of the system, not the registry’s core role.

A container registry is a centralized place to store built container images, keep track of their versions, and distribute them to environments during deployment. When you build an image, you push it to the registry with a tag and a digest; during deployment, the orchestrator pulls that exact image so every instance runs the same code, ensuring consistent, reproducible deployments. Security features like image signing and access controls let you verify the image hasn’t been tampered with and control who can push or pull images, which is essential in production. This combination of storage, versioning, distribution, and trust is why registries are used in deployments. Real-time logging, running apps directly from source code, and separate version control for images describe other aspects of the system, not the registry’s core role.