This page provides an overview of init containers: specialized containers that run before app containers in a Pod. Init containers can contain utilities or setup scripts not present in an app image.
You can specify init containers in the Pod specification alongside the containers array (which describes app containers).
Understanding init containers A Pod can have multiple containers running apps within it, but it can also have one or more init containers, which are run before the app containers are started.

When a pod is scheduled on a kubernetes node, there are various interactions that result into a pod getting an IP address. This post goes into the details of how a pod gets an IP address and describes the interactions between various components - kubelet, CRI Plugin, Container Runtime and CNI Plugins.

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