Microsoft Azure

Cases

1. IL-0136 A deployment that cleared an internal service's caches at peak traffic sent 20 times the normal load to the Azure OpenAI metadata backend in Sweden Central, and health checks that depended on its database restarted instances in a loop for almost six hoursMicrosoft Azure · 2026

   Root cause Faulty deployment

2. IL-0145 A power sag and chiller failure in one Australia East availability zone took down the AKS control plane's compute and its non-zone-redundant SQL Database operation queue, blocking AKS create, update and delete operations in Australia East and Australia SoutheastMicrosoft Azure · 2023

   Root cause Cloud provider outage

3. IL-0144 A systemd security update installed by unattended-upgrades lost the DNS configuration of Ubuntu 18.04 VMs, so AKS kubelets could not resolve registry names and pods failed with ImagePullBackOffMicrosoft Azure · 2022

   Root cause Breaking change in an upgrade

4. IL-0146 New AKS clusters with Azure CNI in Central India lost tunnel connectivity because VMs began getting MAC addresses with a 06 prefix, which exposed a dormant bug in bridge-mode Azure CNIMicrosoft Azure · 2020

   Root cause Software defect

5. IL-0149 Upgrades of AKS clusters on Virtual Machine Scale Sets failed with a 'platform image is not available' error after a service update left a backend service unhealthyMicrosoft Azure · 2019

   Root cause Faulty deployment