Microsoft Azure DNS Fault with Ubuntu 18.04 LTS Servers
Incident Report for Pax8
Resolved
This incident will be closed as it is isolated to a particular OS and version. If you are impacted by this bug, please visit the Ubuntu Launchpad Bug Tracker for workarounds - https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1988119
Posted Sep 01, 2022 - 09:59 NZST
Monitoring
There is a known issue with Microsoft Azure and Ubuntu 18.04 LTS servers that have been updated recently where DNS resolution is broken.
Updates can be seen here - https://azure.status.microsoft/en-us/status via Microsoft.

Users of Ubuntu 18.04 LTS are recommended to review the Ubuntu bug page and apply the recommended fix.
Posted Aug 31, 2022 - 11:14 NZST
This incident affected: Microsoft Azure (Australia East, Australia Southeast).