Multi-Container Pod Example: Sidecar Container
Explore how sidecar containers work within multi-container Kubernetes pods to augment main application containers. Understand the setup, deployment, and real-time syncing of content through a practical sidecar example that watches a GitHub repository and updates a shared volume. This lesson enables you to deploy and manage sidecar containers for dynamic web content updates in Kubernetes pods.
We'll cover the following...
Introduction to a sidecar container
Sidecar containers run alongside the main application container for the entire lifecycle of the Pod. We currently define them as regular containers under the spec.containers section of the Pod YAML, and their job is to augment the main application container or provide a secondary support service.
Note: At the time of writing, Kubernetes doesn’t have API support for sidecar containers. However, Kubernetes 1.28 introduced alpha support for a potential solution.
The following YAML file defines a multi-container Pod with both containers mounting the same shared volume. Listing the main app container as the ...