Migrate bojimans (netbox) to bullseye

Migrate the inventory (netbox) server to bullseye.

Plan:

• Check in vagrant everything is fine...

• Point of attention, netbox service relies on python3-venv, so we need to rebuild the venv after the upgrade

• Actual migration [1]

• Recreate the venv with the new python3 version (3.9) and ensure the netbox service starts ok

• Fix whatever is broken (puppet agent --test is failing after reboot for some reasons)

• Inventory update for that node

• [1]

task=#3802
puppet agent --test
cd /etc
git add .
git commit -m "Commit left-over change prior to trigger dist-upgrade to bullseye"
# finally disable puppet
puppet agent --disable "$task: dist-upgrade to bullseye"
$CMD install -y python3  # keep python3.7 around during migration
sed -i -e 's/buster/bullseye/;s,bullseye/updates,bullseye-security,' /etc/apt/sources.list.d/*
git status
git diff
grep bullseye-security /etc/apt/sources.list.d/debian-security.list
git add .
git commit -m "$task: Migrate sources.list to bullseye"
apt update
CMD="apt -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold"
export DEBIAN_FRONTEND=noninteractive
$CMD upgrade -y
$CMD dist-upgrade -y
rm -rf /opt/netbox/.upgrade_done
/opt/netbox/upgrade.sh  # will rebuild the venv
systemctl status netbox  # should still be ok
reboot

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Migrated from T3802 (view on Phabricator)