Introduction to the Sidecar Pattern

The Sidecar Pattern is a popular design pattern. A helper service is attached to a primary application service. The helper adds extra features, or it handles cross-cutting concerns. Cross-cutting concerns are jobs that every service needs, such as logging, retries and encryption. This pattern takes its name from the concept of a motorcycle sidecar, where the sidecar is attached to and operates alongside the motorcycle.

What a Sidecar Is

A sidecar is a helper process that handles specific tasks. It runs on its own, and it is still deployed as part of one larger unit