On my first tries with the Debian installer, I am struggling with the limited resources for installing to encrypted disks. I am using the same technique I have used with Ubuntu, but failing at the last step:
I create my luks disk(s) before-hand, then run the installer. I find I have to anna-install cryptsetup-udeb, as there is no such choice in "Load Installer Modules". Dropping to a shell, opening the disk, and re-detecting hard drives allows me to carry out the installation (as long as there's a filesystem in the mapped device), but on reboot I'm at an initramfs without cryptsetup. So I use a debian-live to pivot into the system to create a crypttab. I find I also have to install cryptsetup. Then I run update-initramfs. Here is where I'm stuck. The new initramfs still does not include cryptsetup. Why is it not recognizing the crypttab?
I have tried other approaches eg, during installation doing adding an apt-install cryptsetup (after "Select and Install Software") and then editing crypttab, but to no avail.
/D
PS. I pivot like this, in case I'm missing something:
mount root & boot devices in /target
for f in dev dev/pts sys proc; do sudo mount -B /$f /target/$f; done
chroot /target