Overview
The sidecar pattern allows you to add functionality to a service—such as logging, monitoring, or network proxying—without modifying the application code itself. The sidecar shares the same lifecycle and resources (like network and storage) as the main application.
Common Uses
- Service Mesh Proxies: Handling service-to-service communication (e.g., Envoy).
- Log Aggregators: Collecting and shipping logs to a central server.
- Config Managers: Periodically updating configuration files.
Benefits
- Separation of concerns.
- Language independence (the sidecar can be written in a different language than the app).