Pods

Pods are the smallest deployable units of computing that you can create and manage in Kubernetes.

A Pod is similar to a set of containers with shared namespaces and shared filesystem volumes.

Init containers are executed before both the sidecar and main application containers, and their successful completion is a prerequisite for the other containers to start. Init containers offer versatility, allowing actions like checking for application dependencies or configuring the environment for main and sidecar containers.

Sidecar containers run concurrently with the main application container and serve various purposes. For instance, in Istio, a sidecar container functions as a traffic proxy for the main container, and it can also handle tasks such as logging and monitoring.