FreeBSD contributor Allan Jude gives a presentation on ZFS Boot Environments and upgrading remote machines at the latest FOSDEM 19. Click the play button below to tune in:
Using boot environments for atomic in-place upgrades
Describe a system of using ZFS Boot Environments to quickly, safely, and atomically upgrade 100s of remote machines.
Overview:
- How the file system hierarchy is modified to allow the systems to be upgraded in-place
- How we use ZFS to create and deploy the boot environments
- Simplifying the creation of the BEs using poudriere image
- Extending poudriere image to support ZFS
- Using zfsbootcfg to boot a new BE once
- How we determine if the BE “works” and should be promoted to the default
FreeBSD Papers: ZFS Powered Magic Upgrades https://papers.freebsd.org/2019/fosdem/jude-zfs_upgrades/
FOSDEM 2019: https://fosdem.org/2019/schedule/speaker/allan_jude/
