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Mastering CoreOS by Sreenivas Makam

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The CoreOS filesystem

We covered the details of the CoreOS partition table in Chapter 3, CoreOS Autoupdate. The following screenshot shows the default partitioning in the AWS CoreOS cluster:

The CoreOS filesystem

By default, CoreOS uses root partitioning for the Container filesystem. In the preceding table, /dev/xvda9 will be used to store Container images.

Following output shows Docker using Ext4 filesystem with Overlay storage driver in a CoreOS node running in AWS:

The CoreOS filesystem

To get extra storage, external storage can be mounted in CoreOS.

Mounting the AWS EBS volume

Amazon Elastic ...

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