Even though a luks device key is specified along with the mapper, I am being prompted on reboot for / pwd, where the partition should have been auto unlocked and mounted.
Fstab defined devices -
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a device; this may
# be used with UUID= as a more robust way to name devices that works even if
# disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
/dev/mapper/luks-e5911a93-a7ba-43e7-9464-ce1522530b1a / btrfs subvol=@,defaults,noatime,space_cache,autodefrag 0 1
/dev/mapper/luks-7147bcf4-8a7d-4c44-98d3-d8c56893a692 /home xfs defaults,noatime 0 2
/dev/mapper/luks-f7b780ef-41b9-4062-bc68-3c261ee74303 swap swap defaults,noatime 0 2
and the mapper
# <name> <device> <password> <options>
luks-e5911a93-a7ba-43e7-9464-ce1522530b1a UUID=e5911a93-a7ba-43e7-9464-ce1522530b1a /crypto_keyfile.bin luks
luks-7147bcf4-8a7d-4c44-98d3-d8c56893a692 UUID=7147bcf4-8a7d-4c44-98d3-d8c56893a692 /crypto_keyfile.bin luks
luks-f7b780ef-41b9-4062-bc68-3c261ee74303 UUID=f7b780ef-41b9-4062-bc68-3c261ee74303 /crypto_keyfile.bin luks