Don't install Linux sources on our instances
We shouldn't be installing linux-headers-*
in our instances and we should tell apt
to don't even think about installing it. It just linearly consumes disk space for something we don't even need.
At Gitter I did this by removing the package at provisioning time and adding it to Unattended-Upgrade::Package-Blacklist
in /etc/apt.conf.d/50unattended-upgrades
.