Delete "external" volume once build completed?

[hswong3i]

Refer to #55, I found that the created ISO file under /var/lib/libvirt/images are not deleted once build completed or killed, e.g.:

# ls -al /var/lib/libvirt/images
total 4675616
drwxr-xr-x 2 root root         4096 May 14 18:28 .
drwxr-xr-x 7 root root         4096 May 14 00:16 ..
-rw------- 1 root libvirt 797966336 May 14 17:34 packer-chgambijs9f3qa70okrg-ua-cdrom
-rw------- 1 root libvirt 797966336 May 14 17:37 packer-chganqqjs9f3uqi2nntg-ua-cdrom
-rw------- 1 root libvirt 797966336 May 14 17:43 packer-chgaqaijs9f3j9e53r2g-ua-cdrom
-rw------- 1 root libvirt 797966336 May 14 17:45 packer-chgariqjs9f3li6td620-ua-cdrom
-rw------- 1 root libvirt 797966336 May 14 17:46 packer-chgas32js9f3naheds80-ua-cdrom
-rw------- 1 root libvirt 797966336 May 14 18:21 packer-chgbcgqjs9f4hmrbakng-ua-cdrom

As shown, how may time I retry the build, how may time the ISO being copied from packer cache and keep afterward :-(

[thomasklein94]

As coded here, During normal exit conditions, every volume created by the plugin should get deleted except for the artifact.

Can you share the output and logs for a build that fails to clean up afterwards?