Certified Kubernetes Application Developer (CKAD) Practice Test

How does the ambassador pattern benefit a primary container?

1. It increases the number of replicas for scaling

2. It acts as a proxy to external resources

3. It improves the container's security features

4. It stores configuration settings for the primary container

The correct answer is: It acts as a proxy to external resources

The ambassador pattern is a design pattern used in microservices architecture that allows a container, known as an ambassador, to act as a proxy. This proxy serves as an intermediary between the primary container and external resources or services. By handling communication and managing interactions with external components, such as databases, other services, or the internet, the ambassador simplifies the primary container’s responsibilities and reduces its complexity. The ambassador pattern is especially beneficial when dealing with various networking concerns, such as retries, load balancing, or service discovery. By routing requests through the ambassador, the primary container can focus on its main functionality without being burdened by the details of external communication. This approach also enhances modularity and separation of concerns since each container can be dedicated to a specific function—whether that’s handling core business logic in the primary container or managing network interactions in the ambassador container. Consequently, this facilitates easier maintenance, better scalability, and more manageable testing of the application components.