It is recommended currently to only use fedostree inside a non-essential, disposable virtual machine (or a similar physical machine).
First, install the ostree package, of course; make sure you have ostree 2013.7 or newer.
yum install ostree
Now, this bit of one time initialization will both create /ostree for you, as well as /ostree/deploy/fedostree.
ostree admin os-init fedostree
This step tells OSTree how to find the repository you built on the server. You only need to do this once.
ostree remote add --set=gpg-verify=false fedostree http://rpm-ostree.cloud.fedoraproject.org/repo
At this point, we have only initialized configuration. Let's start by downloading the "minimal" install (just @core):
ostree pull fedostree fedostree/20/minimal-x86_64
This step extracts the root filesystem, and updates the bootloader configuration:
ostree admin deploy --os=fedostree fedostree/20/minimal-x86_64
We need to do some initial setup before we actually boot the system. Copy in the storage configuration:
cp /etc/fstab /ostree/deploy/fedostree/current/etc
And set a root password:
chroot /ostree/deploy/fedostree/current passwd
And there is one final (manual) step: You must copy your system's kernel arguments from /boot/grub2/grub.cfg and add them to /boot/loader/entries/ostree-fedora-0.conf, on the options line. This step may be automated further in the future.
IMPORTANT NOTE: You must use selinux=0 for now.
Remember, at this point there is no impact on your installed system except for additional disk space in the `/boot/loader` and `/ostree` directories.
Reboot, and get a GRUB prompt. At the prompt, press `c`. Now, enter:
insmod blscfg bls_import
Then press `Esc`. You should have an additional boot menu entry, named `ostree:fedora:0`. Nagivate to it and press `Enter`.
To upgrade, run as root
ostree admin upgrade
Note that in our demo so far, we did not install `yum` (or even `rpm`). Getting these to work fully is the next phase of the `yum-ostree` development.
But with OSTree, it's possible to atomically transition between different complete bootable filesystem trees. Let's now try the standard-docker-io tree:
ostree pull fedostree fedostree/20/standard-docker-io-x86_64
If you look at the fedostree-make-trees script you can see this tree contains @core, @standard, and finally docker-io.
Like above, let's now deploy it:
ostree admin deploy --os=fedostree fedostree/20/standard-docker-io-x86_64 systemctl reboot