Ubuntu Wiki

About Me

My name is Christian Brauner.

Contact Information

Contributions

• Launchpad Profile: https://launchpad.net/~cbrauner

• Github Profile: https://github.com/brauner

• maintainer and core-developer of LXD, LXC, LXCFS, go-lxc, and glibc projects
• Reported, fixed, and helped with a lot of bugs. Here's just a very small excerpt:

  • https://bugs.launchpad.net/ubuntu/+source/criu/+bug/1620805

  • https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1645037

  • https://bugs.launchpad.net/apparmor/+bug/1664679

  • https://bugs.launchpad.net/apparmor/+bug/1732725

  • https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1770481

    • Provided upstream fix for this bug: https://github.com/systemd/systemd/commit/af984e137e7f53ca3e2fd885b03a25e17fdd0fad

  • https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1732550

    • Provided a series of upstream fixes for this bug and to improve the situation in general: https://sourceware.org/git/?p=glibc.git&a=search&h=HEAD&st=commit&s=brauner

• Fixed CVE-2016-8649: https://nvd.nist.gov/vuln/detail/CVE-2016-8649

• Fixed CVE-2017-5985: https://nvd.nist.gov/vuln/detail/CVE-2017-5985

• Fixed CVE-2016-10124: https://nvd.nist.gov/vuln/detail/CVE-2016-10124

• Did various work on systemd upstream to improve the experience for Ubuntu and the OSS community in general. This especially included improving handling of cgroups, service isolation mechanisms, and running systemd in containers.
• I've also been focused on doing a lot of kernel work that includes implementing new features and fixing critical bugs:
  • fixing the devpts filesystem:

    • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7d71109df186d630a41280670c8d71d0cf9b0da9

    • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a319b01d9095da6f6c54bd20c1f1300762506255

    • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4e15f760a43c7cb88e2b7ad6882501ccab5de29f

  • namespacing kobject uevents:

    • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=94e5e3087a67c765be98592b36d8d187566478d5

    • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=692ec06d7c92af8ca841a6367648b9b3045344fd

    • https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=26045a7b14bc7a5455e411d820110f66557d6589

    • https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=a3498436b3a0f8ec289e6847e1de40b4123e1639

  • making network namespace interactions faster (benefits LXD + LXC greatly):

    • https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=7c4f63ba824302492985553018881455982241d6

    • https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=c310bfcb6e1be993629c5747accf8e1c65fbb255

    • https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=b61ad68a9fe85d29d5363eb36860164a049723cf

    • https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=5bb8ed075428b71492734af66230aa0c07fcc515

    • https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=7973bfd8758d05c85ee32052a3d7d5d0549e91b4

    • https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=4ff66cae7f10b65b028dc3bdaaad9cc2989ef6ae

  • improving user namespaces (benefits LXD + LXC greatly):

    • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aa4bf44dc851c6bdd4f7b61b5f2c56c84dfe2ff0

    • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6397fac4915ab3002dc15aae751455da1a852f25

In recent years I've work on pidfds (process file descriptors for Linux), idmapped mounts, various vfs and core kernel work. I further improved LXC, LXD, systemd and other projects. I continue to contribute heavily upstream and fix bugs.

All my upstream contributions have been made as a member of the Ubuntu community with my [email protected] email address. I've been an active speaker on a range of conferences representing not just the LXD and LXC projects but also Ubuntu in general.

Future Goals

I plan on improving the container and virtualization experience with LXD, LXC, and Ubuntu in general. Since Ubuntu aims to be the top operating system supporting containers this is something that Ubuntu will heavily benefit from. I'm currently in the process of working on various pieces in the upstream kernel benefiting containers and regular userspace alike.

Testimonials

Note: If you have anything nice to say about this person, please do add it below along with @ SIG @ (no spaces). The @ SIG @ command will sign your name and date/time it after you "Save Changes".

I enthusiastically +1 Christian's application for Ubuntu membership. In the past I have worked with Christian on a number of features and bugs in Linux and lxc, and he has always been knowledgeable, responsive and extremely helpful. He has represented Ubuntu well through his numerous upstream contributions, kernel maintenance and participation in the Linux Plumbers Conference planning committee. His contributions to Ubuntu have been numerous, and I have no doubt that he will continue making Ubuntu better through his upstream work and continued collaboration with Ubuntu.

-- sforshee 2022-02-01 16:00:41