102 lines
2.7 KiB
Markdown
102 lines
2.7 KiB
Markdown
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"fedostree"
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===========
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This project uses [rpm-ostree](https://github.com/cgwalters/rpm-ostree)
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to commit multiple comps groups
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Pulling and booting from a client machine
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-----------------------------------------
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First, install the ostree package, of course; make sure you have
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ostree 2013.7 or newer.
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yum install ostree
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Now, this bit of one time initialization will both
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create `/ostree` for you, as well as `/ostree/deploy/fedostree`.
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ostree admin os-init fedostree
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This step tells OSTree how to find the repository you built on
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the server. You only need to do this once.
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ostree remote add fedostree http://http://209.132.184.226/repo
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Now, since we did not GPG sign our repo above, we need to disable GPG
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verification. Add `gpg-verify=false` in the `[remote]` section.
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nano /ostree/repo/config
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At this point, we have only initialized configuration. Let's start
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by downloading the "minimal" install (just @core):
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ostree pull fedostree fedora/20/minimal
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This step extracts the root filesystem, and updates the bootloader
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configuration:
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ostree admin deploy --os=fedostree fedora/20/minimal
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We need to do some initial setup before we actually boot the system.
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Copy in the storage configuration:
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cp /etc/fstab /ostree/deploy/fedostree/current
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And set a root password:
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chroot /ostree/deploy/fedostree/current passwd
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And there is one final (manual) step: You must copy your system's
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kernel arguments from `/boot/grub2/grub.cfg` and add them to
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`/boot/loader/entries/ostree-fedora-0.conf`, on the `options`
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line. This step may be automated further in the future.
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IMPORTANT NOTE: You must use selinux=0 for now.
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Booting the system
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------------------
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Remember, at this point there is no impact on your installed system
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except for additional disk space in the `/boot/loader` and `/ostree`
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directories.
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Reboot, and get a GRUB prompt. At the prompt, press `c`. Now, enter:
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insmod blscfg
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bls_import
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Then press `Esc`. You should have an additional boot menu entry,
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named `ostree:fedora:0`. Nagivate to it and press `Enter`.
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Inside the system
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-----------------
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To upgrade, run as root:
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ostree admin upgrade
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Note that in our demo so far, we did not install `yum` (or even
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`rpm`). Getting these to work fully is the next phase of the
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`yum-ostree` development.
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Switching trees
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---------------
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Remember, with OSTree, it's possible to atomically transition between
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different complete bootable filesystem trees. Let's now try the
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"standard-docker-io" tree:
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ostree pull fedostree fedora/20/standard-docker-io
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If you look at the [http://209.132.184.226/fedora-ostree-ci](script),
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you can see this tree contains `@core`, `@standard`, and finally
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`docker-io`.
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Like above, let's now deploy it:
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ostree admin deploy --os=fedostree fedora/20/standard-docker-io
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systemctl reboot
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