Virtual Machine Scale Set in Failed Provisioning state due to failed installaiton of DependencyAgentLinux

Question

All the virtual machine scale sets for my AKS cluster nodepools are in failed State due to unsuccessful extension installations. They OS is Linux with size Standard_D32s_v5 (2 instances).

The following error log is provided

The handler for VM extension type 'Microsoft.Azure.Monitoring.DependencyAgent.DependencyAgentLinux' has reported terminal failure for VM extension 'DependencyAgentLinux' with error message: '[ExtensionOperationError] Non-zero exit code: 51, /var/lib/waagent/Microsoft.Azure.Monitoring.DependencyAgent.DependencyAgentLinux-9.10.18.4770/bin/time-limit 870 scripts/install.sh >/dev/null [stdout] [stderr] Unsupported distribution: Ubuntu 22.04.5 LTS The Dependency Agent was not installed. See https://aka.ms/ServiceMapTroubleshooting (exit code = 0x00000033) for assistance. '. 'Install handler failed for the extension. More information on troubleshooting is available at https://aka.ms/VMExtensionDependencyAgentLinuxTroubleshoot'

Uninstalling the extension fails. Even though the extension is not displayed anymore, the VMSS cannot be restarted and it remains in a failed state. The extension also doesn't appear anymore in az vmss extension list --resource-group $GROUP --vmss-name $VMSS.

Is it possible to disable the installation of the extensions? It's automatically installed since Cluster Insights are enabled, from what I understand.

Answer 1

@Matthaios Vasalakis

I am wondering how your configuration is setup. When I created a new AKS cluster and enabled Container Insights I did not face any issues. DependencyAgentLinux is not compatible with Ubuntu 22.04 which explains the error, but I am unsure how this extension is being enabled. Please share the configuration so I can reproduce and escalate this if needed.

Please let me know if you are still facing issues and I will be happy to assist.