Boot partition too small for snapshotting

[Harald Rudell]

RUnning the 20.04 desktop zfs install, the boot partition is 500 MiB

I run 512 MiB without zfs because the default 234 MiB has been too small for a long time, like two years

500 MiB is too little because snapshotting is taking place. boot cannot hold even two kernels

macOS boots from a single container that can have any number of installations

That would be a better solution for zfs, to have a single pool where any number of bootable installations can coexists, each with their own boot area and encrypted root file system

Get-around:
# delete all boot snapshots so system, upgrades may complete:
zfs list -H -o name -t snapshot -r bpool | xargs -n1 zfs destroy

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
Uname: Linux 5.4.0-48-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Oct 2 13:26:21 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
InstallationDate: Installed on 2020-08-14 (48 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Harald Rudell (harald-rudell)]

With zfs as of 22.04, the boot partition should be 4 GiB to avoid troubles