Masking systemd services in a guest

In the previous post I told you how to get cloud-init to work in non-cloud environments.

What if you need to disable cloud-init entirely?

With systemd services and guestfish this is easy:

$ guestfish -a disk.img -i \
     ln-sf /dev/null /etc/systemd/system/cloud-init.service

Why not use this opportunity to get rid of tmp-on-tmpfs at the same time:

$ guestfish -a disk.img -i \
     ln-sf /dev/null /etc/systemd/system/tmp.mount

Systemd’s design of mapping services to files also makes it easy to list the available services in a guest:

$ virt-ls -a /tmp/fedora-19.img -R /lib/systemd/system