📖 ~1 min read
Table of contents
Symptom & Impact
Database service remains failed, causing application downtime and failed transaction processing.
Environment & Reproduction
Often appears after data directory move, backup restore, or filesystem mount changes.
Root Cause Analysis
Ownership mismatch, wrong SELinux label, or stale PID/socket files block service initialization.
Quick Triage
Run `systemctl status mariadb`, inspect data dir perms and context, and check journalctl for InnoDB errors.
Step-by-Step Diagnosis
Validate `my.cnf` paths, test directory access, and correlate AVC denials using audit logs.
Solution – Primary Fix
Set correct ownership and SELinux context, remove stale lock artifacts, then start mariadb service.
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Solution – Alternative Approaches
Temporarily start with safe mode for recovery, then apply permanent path and policy corrections.
Verification & Acceptance Criteria
Service is active, client connections succeed, and no recurring startup failure in journalctl.
Rollback Plan
Restore prior data directory and configuration from backup if new location introduces instability.
Prevention & Hardening
Automate ownership/context checks and include SELinux validation in DB maintenance procedures.
Related Errors & Cross-Refs
`restorecon -Rv /var/lib/mysql && systemctl restart mariadb && journalctl -u mariadb -n 120`
Related tutorial: View the step-by-step tutorial for rhel-7.
View all rhel-7 tutorials on the Tutorials Hub →
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
RHEL 7 database service docs and SELinux practices for MariaDB operational reliability.
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