📖 ~1 min read
Table of contents
Symptom & Impact
Application fails on boot because required NFS mount is absent, breaking startup dependencies and data access.
Environment & Reproduction
RHEL 7 client with fstab NFS entries boots before network-online target is fully satisfied.
Root Cause Analysis
Mount unit ordering lacks proper dependency on network readiness, so NFS attempts fail early.
Quick Triage
Review systemctl status for mount and network targets, test NFS server reachability through firewalld.
Step-by-Step Diagnosis
Inspect journalctl boot logs, check mount unit dependencies, and validate SELinux context for mount points.
Solution – Primary Fix
Add _netdev and network-online dependency options, reload daemon, and restart mount/service units.
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Solution – Alternative Approaches
Use automount units, delayed service starts, or local cache fallback to reduce boot-time coupling.
Verification & Acceptance Criteria
After reboot, NFS mount is present before application start and no mount failure events remain.
Rollback Plan
Revert fstab and unit override changes, then reload systemd and restore prior boot behavior.
Prevention & Hardening
Test boot dependency graphs, monitor mount latency, and enforce standard NFS unit templates.
Related Errors & Cross-Refs
Related to DNS resolver delays, firewalld NFS service omissions, and service unit ordering mistakes.
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
Consult RHEL NFS client setup docs, systemd mount unit references, and journalctl boot analysis guidance.
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