LUKS encryption on root partition LVM

Hello Team,

Greetings to you!

We have a requirement to encrypt the root partition using LUKS encryption.
We tried creating the LUKS and copied the root content again then added /etc/crypttab entry and rebuild using dracut -f command but during boot time it is again going into dracut shell. Is there any good article or steps which can take me to achieve this task. I am really new to RHEL and LVM so it is taking more time to understand the functionality. It will be great help in case if I get good solution to achieve this.

I am trying it with RHEL 8.

Thanks&Regards,
Gobi S.