2.8 KiB
"fedostree"
This project uses rpm-ostree to commit multiple comps groups
Pulling and booting from a client 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 fedostree http://http://209.132.184.226/repo
Now, the repository is not GPG signed (yet), so we need to disable GPG
verification. Add gpg-verify=false in the [remote] section.
nano /ostree/repo/config
At this point, we have only initialized configuration. Let's start by downloading the "minimal" install (just @core):
ostree pull fedostree fedora/20/minimal
This step extracts the root filesystem, and updates the bootloader configuration:
ostree admin deploy --os=fedostree fedora/20/minimal
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.
Booting the system
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.
Inside the system
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.
Switching trees
Remember, 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 fedora/20/standard-docker-io
If you look at the http://209.132.184.226/fedora-ostree-ci,
you can see this tree contains @core, @standard, and finally
docker-io.
Like above, let's now deploy it:
ostree admin deploy --os=fedostree fedora/20/standard-docker-io
systemctl reboot