π ~1 min read
Table of contents
Symptom & Impact
Manual network edits are reverted after restart.
Environment & Reproduction
Typical on cloud images managed by cloud-init.
Root Cause Analysis
Datasource metadata causes cloud-init to regenerate netplan files.
Quick Triage
Confirm cloud-init ownership of network config.
Step-by-Step Diagnosis
Inspect cloud-init logs and generated network JSON.
Solution – Primary Fix
Disable cloud-init networking and manage netplan directly.
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Solution – Alternative Approaches
Keep cloud-init enabled and update seed userdata network config.
Verification & Acceptance Criteria
Network config remains stable across reboot cycles.
Rollback Plan
Remove disable file and let cloud-init manage network again.
Prevention & Hardening
Define clear ownership between image defaults and runtime config management.
Related Errors & Cross-Refs
Related to DHCP route metrics and stale metadata issues.
Related tutorial: View the step-by-step tutorial for Ubuntu 22.04 LTS.
View all Ubuntu 22.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Ubuntu cloud-init networking behavior documentation.
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