Re: [atomic] How to migrate a Fedora Atomic Host from devicemapper to overlay2

[Micah Abbott <miabbott redhat com>]

On 03/28/2017 09:01 PM, Colin Walters wrote:
> There's some work on `atomic storage migrate`:
> https://trello.com/c/vAunYr5K/310-docker-storage-migrate-images-containers-when-switching-drivers
>
> However, if you just have a fresh system and are OK blowing away
> all of your containers/volumes:
>
> ```
> $ systemctl stop docker
> $ rm /var/lib/docker/* -rf
> $ lvm lvremove atomicos/docker-pool
>   # Reallocate space to the root - tweak how much to your liking
> $ lvm lvextend -r -L +50%FREE atomicos/root

When I tried this, I got an error.  Looks like you need '-l' instead:

$ lvm lvextend -r -l +50%FREE atomicos/root

> $ echo STORAGE_DRIVER=overlay2 >> /etc/sysconfig/docker-storage-setup
> $ rm /etc/sysconfig/docker-storage
> $ systemctl start docker
> ```