Dracut /etc/crypttab Support in Initramfs

[nick_0189]

Hello everyone,

In summary: Generally, when will Dracut use a crypttab file in the initramfs?

I'm trying to understand the documentation for Dracut and how I should configure it for my installation. Specifically, I don't understand the relationship between `/etc/crypttab` and Dracut. Dracut includes an option for parsing a crypttab file (`man dracut.cmdline`, `rd.luks.crypttab`), but crypttab seems to really be more of a systemd thing and I can't get Dracut to unlock root with a crypttab file embedded in the initramfs at `/etc/crypttab` - a custom module or cmdline arguments are required to unlock it. Does it unlocking root from information in a crypttab file work for anyone else? How much support does Dracut actually have for a crypttab file, since it is mentioned only briefly in the documentation and in the code?

In the source code here it looks like Dracut parses a crypttab file when the `rd.hostonly` option is passed, but why does it seem like it actually doesn't support a crypttab file the way I think it does?

I can't find anything specifically stating that Dracut doesn't support a crypttab file, and I can't find anything specifically outlining the extent to which Dracut supports a crypttab file. It's confusing to me. Any clarification would be helpful.


Thank you.