[Bug] - dracut[E]: Module 'systemd-pcrphase' depends on 'tpm2-tss', which can't be installed

[daniejstriata]

Describe the bug
I get this error updating with the latest dracut package:
dracut[E]: Module 'systemd-pcrphase' depends on 'tpm2-tss', which can't be installed

To Reproduce
Steps to reproduce the behavior:

1. run os update:
   yum update --releasever=2023.6.20241111 --best --allowerasing
   look for the dracut error.

[elsaco]

@daniejstriata what can't be installed, systemd-pcrphase or tpm2-tss?

The package tpm2-tss is available and installs okay on the 2023.6 release:

[ec2-user@ip-x-x-x-x ~]$ sudo dnf install tpm2-tss
Last metadata expiration check: 0:00:13 ago on Fri Nov 15 16:35:02 2024.
Dependencies resolved.
========================================================================================================================
 Package                   Architecture            Version                           Repository                    Size
========================================================================================================================
Installing:
 tpm2-tss                  x86_64                  4.0.2-1.amzn2023                  amazonlinux                  410 k

Transaction Summary
========================================================================================================================
Install  1 Package

Total download size: 410 k
Installed size: 1.6 M
Is this ok [y/N]: y
Downloading Packages:
tpm2-tss-4.0.2-1.amzn2023.x86_64.rpm                                                    2.2 MB/s | 410 kB     00:00
------------------------------------------------------------------------------------------------------------------------
Total                                                                                   1.8 MB/s | 410 kB     00:00
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                                1/1
  Running scriptlet: tpm2-tss-4.0.2-1.amzn2023.x86_64                                                               1/1
  Installing       : tpm2-tss-4.0.2-1.amzn2023.x86_64                                                               1/1
  Running scriptlet: tpm2-tss-4.0.2-1.amzn2023.x86_64                                                               1/1
  Verifying        : tpm2-tss-4.0.2-1.amzn2023.x86_64                                                               1/1

Installed:
  tpm2-tss-4.0.2-1.amzn2023.x86_64

Complete!

Is systemd-pcrphase a package you added to your system? It's not available in the amazonlinux repo.

[daniejstriata]

This is a clean install that was upgraded. If Dracut has new dependencies them is should be installed by the upgrade.

[elsaco]

The new dracut-102 package has modules not available in dracut-055, one being systemd-pcrphase. Use dracut --list-modules to see the difference. However, systemd-pcrphase can't be added to the initrd image:

[ec2-user@ip-172-x-x-x ~]$ sudo dracut --add systemd-pcrphase --force
dracut[E]: Module 'systemd-pcrphase' depends on 'tpm2-tss', which can't be installed
dracut[E]: Module 'systemd-pcrphase' cannot be installed.

I think is because the instance I'm using is not UEFI, so there's no TPM support.

On a dracut-055 instance the above command can't find the module, it's not there:

[ec2-user@ip-172-x-x-x ~]$ sudo dracut --add systemd-pcrphase --force
dracut: dracut module 'systemd-pcrphase' cannot be found or installed.