Some more info:
/etc/initramfs-tools/initramfs.conf
----
IP=172.21.6.14::172.21.0.254:255.255.0.0:debianmini2:eth0:none:172.21.0
.254
/etc/dropbear/initramfs/dropbear.conf
----
DROPBEAR_OPTIONS="-j -k -p 4222 -s -c cryptroot-unlock"
/etc/default/grub
----
GRUB_CMDLINE_LINUX_DEFAULT="net.ifnames=0 biodevname=0"
blkid
----
/dev/mapper/debianmini2--vg-root:
UUID="20be7a15-6d03-46a2-8443-20dfc41169f7"
BLOCK_SIZE="4096" TYPE="ext4"
/dev/mapper/debianmini2--vg-swap_1:
UUID="62ebe24a-7a5c-4404-8bdf-34890ba19523" TYPE="swap"
/dev/mapper/sda3_crypt:
UUID="FuQkJ0-5MCL-RU6Q-uHit-rYz0-T026-KqSJqy"
TYPE="LVM2_member"
/dev/sda2:
UUID="bed1831f-a943-4166-baa6-468081f2737c"
BLOCK_SIZE="1024" TYPE="ext2"
PARTUUID="527bece0-3c33-4f4f-ba08-c8673b2cc10c"
/dev/sda3:
UUID="82b226e2-f763-4c43-b96c-50ae2dfcaed3"
TYPE="crypto_LUKS"
PARTUUID="64452b8e-edba-46e4-9e11-a42048cd9fcf"
/dev/sda1: UUID="87D1-1F13" BLOCK_SIZE="512"
TYPE="vfat" PARTUUID="a6033d8b-cbb2-4943-b53d-b233330c9d8f"
/etc/fstab
----
/dev/mapper/debianmini2--vg-root / ext4 errors=remount-ro 0 1
# /boot was on /dev/sda2 during installation
UUID=bed1831f-a943-4166-baa6-468081f2737c /boot ext2 defaults 0 2
# /boot/efi was on /dev/sda1 during installation
UUID=87D1-1F13 /boot/efi vfat umask=0077 0 1
/dev/mapper/debianmini2--vg-swap_1 none swap sw 0 0
