vm image

[thetredev]

The following optimizations have been made (manually, for testing/debugging):

• [x] Disabled the following services: cloud-init cloud-init-local cloud-finish cloud-config cloud-config.service systemd-networkd-wait-online.service
• [x] Default systemd target set to multi-user.target
• [x] Installed kernel 6.7 from Debian backports and installed package non-free-firmware/firmware-linux to minimize firmware/compatibility issues with the host (kernel 6.8)
• [x] Removed default kernel image 6.1 after reboot from last step
• [x] Removed cloud-init, ran apt autoremove --purge afterwards
• [x] Disabled IPv6: apply net.ipv6.conf.all.disable_ipv6=1 via sysctl

All of this reduced the boot time from more than 20s to 10-15s, given the image is already unpacked by LXD.

[thetredev]

To properly do this I should look into distrobuilder:

• https://linuxcontainers.org/distrobuilder/docs/latest/tutorials/use/
• https://github.com/lxc/lxc-ci/blob/main/images/debian.yaml