guestfs: eliminate rescue initramfs images from base images

dracut-config-rescue generates the "rescue" images in the /boot
partition (at least on Fedora hosts). This is a waste of space since
these are ultimately throwaway VMs.

Uninstall dracut-config-rescue from the base images, and delete any
already-generated images , thus saving space for more "make linux"
invocations.

Signed-off-by: Jeff Layton <[email protected]>
Signed-off-by: Luis Chamberlain <[email protected]>

Author: jtlayton

playbooks/roles/base_image/templates/virt-builder.j2

@@ -13,6 +13,12 @@ copy-in {{ guestfs_distro_source_and_dest_file }}:{{ target_dir }}
 {% endif %}
 
 install sudo,qemu-guest-agent,python3,bash
+
+# get rid of any rescue initramfs images, and prevent new ones from being generated
+uninstall dracut-config-rescue
+delete /boot/*rescue*
+delete /boot/loader/entries/*rescue*
+
 run-command useradd {{ kdevops_uid }} -s /bin/bash -m kdevops
 append-line /etc/sudoers.d/kdevops:kdevops   ALL=(ALL)       NOPASSWD: ALL
 edit /etc/default/grub:s/^GRUB_CMDLINE_LINUX_DEFAULT=.*/GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0"/