Service Fabric - Allocation failed when re-deploy ARM templates for incremental updates

Question

We have Service Fabric running in Both West Us2 and West Europe regions. When re-deploy the ARM templates to make incremental updates, we are now receiving this error in both regions:

Allocation failed. If you are trying to add a new VM to a Virtual Machine Scale Set with a single placement group or update/resize an existing VM in a Virtual Machine Scale Set with a single placement group, please note that such allocation is scoped to a single cluster, and it is possible that the cluster is out of capacity. Please read more about improving likelihood of allocation success at http://aka.ms/allocation-guidance.

Answer 1

Hi Lily S,

Thank you for reaching out to us on the Microsoft Q&A forum.

As you re-deploy the ARM templates to make incremental updates, your VMs also got re-deployed and there might not be enough size currently available in the selected region or zone, to handle this issue you can do either of the processes

1. Alternative VM sizes for the same zone and region: Standard_A2_v2, Standard_A2m_v2, or Standard_D2a_v4
2. Alternative zones for the same VM size and region: Zone 1 and 3

For more information, please refer the below document
Troubleshooting Azure VM allocation failures - Virtual Machines | Microsoft Learn

Hope this helps!