problem

rng-tools is a hard dependency of both cloudstack-management and cloudstack-agent

The current packaging/suse15/cloud.spec still runs this in the post-install scripts for both management and agent (lines 469 and 533):

/usr/bin/systemctl enable --now rngd > /dev/null 2>&1 || true

If rngd.service doesn't exist and rng-tools is inactive right after a fresh CloudStack install.

versions

ACS 4.22.x
ACS 4.23.0
Management and hypervisor os
SUSE Linux Enterprise Server 15 SP7 (kernel 6.4.0-150700.53.81-default),

The steps to reproduce the bug

On SLES 15 SP7 with the CloudStack SUSE repo configured

zypper install cloudstack-agent # or cloudstack-management

systemctl list-unit-files | grep -i rng
systemctl status rngd --no-pager
systemctl status rng-tools --no-pager

cskvm1-sles-sap:~ # systemctl status rng-tools --no-pager
○ rng-tools.service - Start the rngd daemon
Loaded: loaded (/usr/lib/systemd/system/rng-tools.service; disabled; preset: disabled)
Active: inactive (dead)
cskvm1-sles-sap:~ # systemctl status rng-tools --no-pager
○ rng-tools.service - Start the rngd daemon
Loaded: loaded (/usr/lib/systemd/system/rng-tools.service; disabled; preset: disabled)
Active: inactive (dead)

What to do about it?

rng-tools.service should be enabled and active (running) after the CloudStack package is installed.

workaround

systemctl enable --now rng-tools