Comment 60 for bug 1977919

For those who can't update, because the machine starts docker at startup and so crashes before you can get a shell open to upgrade to 1031, here's my method (on gcp)

stop and edit machine to detach disk
attach to another machine boot that and mount somewhere
edit <mountpath>/boot/grub/grub.cfg and add single as a kernel commandline parameter
shutdown temp box and detach disk
reattach disk to original machine and boot
connect via serial console
sudo systemctl disable docker
remove single from grub.cfg and reboot
ssh in and update to latest kernel and reboot
sudo systemctl enable docker