Deployment Flashcards

What does a blue-green deployment strategy involve?

Answer: Running two identical environments and switching traffic between them

Blue-green deployment maintains two identical production environments, allowing instant traffic switching and easy rollback.

Which HTTP status code indicates a successful deployment health check?

Answer: 200

A 200 OK response from a health check endpoint confirms the service is running and accepting requests.

What is the primary purpose of a Dockerfile's ENTRYPOINT instruction?

Answer: Define the default command that runs when the container starts

ENTRYPOINT specifies the executable that runs when a container is started from the image.

What is canary deployment?

Answer: Gradually rolling out changes to a small percentage of users before full rollout

Canary deployment releases a new version to a small traffic slice first to detect issues before a full rollout.

In a CI/CD pipeline, what is the purpose of a staging environment?

Answer: To mirror production for final testing before release

Staging is a production-like environment used to validate changes in context before they reach real users.

Which command builds a Docker image from a Dockerfile in the current directory?

Answer: docker build -t myapp .

`docker build -t myapp .` builds an image tagged 'myapp' using the Dockerfile in the current directory.

What does 'infrastructure as code' (IaC) mean in deployment?

Answer: Provisioning and managing infrastructure through machine-readable configuration files

IaC means defining servers, networks, and services in versioned config files (e.g., Terraform, CloudFormation) instead of manual processes.