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In 7.2.3, the default rootfs size is set to (10 or 20 GB).

Document for this user story:

* the default rootfs size
* how to set the container rootfs size as a docker CLI option
* mention that the user can only increase the size and not decrease it

Likely Guide:
Getting Started with Containers

Trello Card:
https://trello.com/c/ViUfjt3y/23-storage-devmapper-per-container-rootfs-sizes-default

Documented in: 

7.7. Increasing the Base Device Size

https://access.qa.redhat.com/documentation/en/red-hat-enterprise-linux-atomic-host/version-7/getting-started-with-containers/#managing_storage_with_docker_formatted_containers

Not everything mentioned in the Trello card has been implemented yet, so I documented it as it is today.

@yoana, I clicked on the link and did not see your changes. What am I missing.

Shishir, can you please also review the changes.

Hey Vivek,

This should be available here: https://access.redhat.com/documentation/en/red-hat-enterprise-linux-atomic-host/version-7/getting-started-with-containers/#increasing_the_base_device_size

Let me know if you can see the changes?

Documented in 7.7. Increasing the Base Device Size:

https://access.redhat.com/documentation/en/red-hat-enterprise-linux-atomic-host/version-7/getting-started-with-containers/#increasing_the_base_device_size

Closing this bug. Vivek, reopen if the text needs more work. If it needs substantial rework or there are new features, please open a new bug for 7.2.6.

The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days