Some hosts, such as the Raspberry Pis built using default Fedora images,
do not have proper filesystem separation, but use a single volume for
the entire filesystem. These hosts cannot have the root filesystem
mounted read-only, since all the writable data are also stored there.
When Jenkins runs configuration policy jobs, it always tries to remount
the root filesystem as read-only on every machine that it configured.
For these hosts with a single volume, this step fails, causing the job
to be marked as failed. To avoid this, I have added a new group,
*rw-root*; hosts in this group will be omitted from the final remount
step.
Dustin
276ac7e5fb