/var/lib/cobbler/kickstarts/pxerescue.ks is in maas-provision-common 2.2.2-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | # Rescue Boot Template
# Set the language and language support
lang en_US
langsupport en_US
# Set the keyboard
keyboard "us"
# Network kickstart
network --bootproto dhcp
# Rescue method (only NFS/FTP/HTTP currently supported)
url --url=$tree
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