Overview
The sidecar pattern allows you to add functionality to an application without modifying its code. The sidecar container shares the same lifecycle, network, and storage as the main application container.
Common Uses
- Proxies: Handling service-to-service communication (e.g., Envoy in a service mesh).
- Logging: Collecting logs from the main application and sending them to a central server (e.g., Fluentd).
- Monitoring: Collecting metrics from the application (e.g., Prometheus exporter).
- Configuration: Periodically refreshing configuration files from a remote source.
Benefits
- Separation of Concerns: Keeps the main application focused on its core logic.
- Reusability: The same sidecar can be used with many different applications.