<p>I'm currently looking through an Istio and Kubernetes talk and mention the management of services along with the use of sidecars. I'm not sure what that is.</p>

<p>I think of them as helper containers.  A pod can have 1 or more containers. A container should do only one thing, like a web server or load balancer.  So if you need some extra work to be done inside the pod, like github sync or data processing, you create an additional container AKA sidecar.</p>
