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  • Patches for Ganeti

    This repository contains our patches for ganeti which we apply on top of the already patched debian package. We retrieve the package source from debian, add some patches, build, and copy to our debian repository. After installation from our repository, we need to pin those to prevent updating from debian's regular sources. See apt's documentation on pinning.

    Interesting Links

    Rebuilding an existing package is described here: https://wiki.debian.org/BuildingTutorial

    More information on building: https://wiki.debian.org/HowToPackageForDebian

    The ganeti package uses quilt to manage its patches. See this tutorial: https://raphaelhertzog.com/2012/08/08/how-to-use-quilt-to-manage-patches-in-debian-packages/

    Rebuilding Ganeti

    It boils down to the following steps:

    • apt-get source ganeti
    • cd ganeti-2.15.2/debian
    • quilt import ../remove_blockdev_from_movable_list.patch and others
    • dch -n creates a new changelog entry
    • debuild -b -uc -us builds the package

    At least according to my zsh history.

    If you are building from an already changed version, but without that particular changelog, use:

    • dch --auto-nmr --newversion $newversion

    Ideally, you copy the old changelog to the new one. Look up the old version number! Add "Non-maintainer upload." manually to your list of changes.

    Patch Details

    fix_ceph_showmap.patch

    Fixes an incompatibility with current ceph versions.

    See also: https://github.com/ganeti/ganeti/issues/1233

    increase_max_disk_count.patch

    sigh

    There is a constant number of allowed disks that may be attached to a VM. We increase this limit.

    remove_blockdev_from_mirrored_list.patch and remove_blockdev_from_movable_list.patch

    Removes block devices from lists of mirrored and movable devices. This prevents such VMs from being migrated.

    This may not solve the general case, but is makes it compatible with our usage.

    add_rbd_cache_support.patch

    Add caching support for rbd devices. This was disabled for arbritrary external storage. But this does not make sense for rbd.