Multi-Container Pods: Init Containers
Explore how init containers in Kubernetes ensure essential setup tasks run to completion before main application containers start. Understand their role in environment preparation within multi-container pods, and differentiate them from sidecar containers that run alongside main applications. Gain insights into practical examples of init containers for initializing connectivity and cloning repositories, enhancing your Kubernetes deployment skills.
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Init containers are a special type of container defined in the Kubernetes API. We run them in the same Pod as application containers, but Kubernetes guarantees they’ll start and complete before the main app container starts. It also guarantees they’ll only run once.
The purpose of init containers is to prepare and initialize the environment so it’s ready for application containers.
Consider a couple of quick examples.
We have an application that should only ...