Design a Container Storage Layer · System Design Interview

Design a Container Storage LayerDesign how a host stores image layers and gives each container a writable filesystem on top of them, without copying an image for every container.What it has to do

Many containers run from the same image without each holding its own copy of it

A container can write to its filesystem without changing the image or any other container

Data that has to outlive a container is kept somewhere the container’s removal does not touch

Scale

Containers per host: 400

Distinct images on a host: 60

Out of scope

Pulling images over the network

Backup of volumes

Distributed or network-attached storage

Practise this challengeAll system design challenges

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