CentOS Stream 10 – Common Problem 090 – Diagnosis and Fix

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

cgroup v2 limits not applied to legacy services on CentOS Stream 10 disrupts services and slows incident response until the root cause is resolved.

Environment & Reproduction

Services using legacy cgroup v1 directives ignore MemoryMax under unified cgroup v2.

systemctl show  -p MemoryMax,CPUQuota
mount | grep cgroup

Root Cause Analysis

Misalignment between kernel configuration and CentOS Stream 10 defaults causes the failure path described above.

Quick Triage

Confirm package state, service status, and recent changes before deeper diagnostics.

systemctl status
rpm -qa | grep -i 
journalctl -p err -b --no-pager | tail -100

Step-by-Step Diagnosis

Capture detailed logs, configuration deltas, and runtime state to isolate the failing component.

systemd-cgls
stat -fc %T /sys/fs/cgroup
systemctl cat 

Solution – Primary Fix

Apply the targeted configuration change and restart the relevant services to restore expected behavior.

sudo systemctl edit 
# Add: [Service]nMemoryMax=2GnCPUQuota=200%
sudo systemctl daemon-reload
sudo systemctl restart 

Solution – Alternative Approaches

Drop legacy CPUShares/MemoryLimit settings and rely on cgroup v2 controllers.

Verification & Acceptance Criteria

Validate the fix with deterministic checks and ensure no regressions in dependent services.

systemctl show  -p MemoryCurrent
systemd-cgtop

Rollback Plan

Revert configuration and restart services to return to the previous known-good state.

systemctl revert 
systemctl restart 

Prevention & Hardening

Audit unit files for cgroup v1 directives during migration.

Automate patch management and compliance across your fleet with our DevOps services.

Related Errors & Cross-Refs

Related: cgroupv2, unified hierarchy, MemoryMax; see also adjacent topics in the CentOS Stream 10 common problems series.

Related tutorial: View the step-by-step tutorial for centos-stream-10.

View all centos-stream-10 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

CentOS Stream documentation, Red Hat upstream guides, and CentOS Stream 10 release notes covering this subsystem.