EC2 Time Sync & Chrony Configuration Diagnostics
Data strictly extracted from official AWS troubleshooting documentation. Click the symptom below to get the targeted CLI remediation commands.
🚨 Step 1: What specific error symptom are you experiencing?
Please click the most accurate description:
Quick Reference Table
| # | Scenario | Key Error Signal | Primary Fix |
|---|---|---|---|
| 1 | Smeared vs Unsmeared Time Server Conflict | server 169.254.169.123 mixed with non-smeared sources | systemctl restart systemd-timesyncd.service |
| 2 | Mixed IPv4/IPv6 NTP Endpoint Conflict | server fd00:ec2::123 used alongside IPv4 entry | Use only one entry in chrony.conf — IPv4 or IPv6, not both |
| 3 | Chrony Time Sources Unreachable | ^? source state flag in chronyc sources -v | N/A |