Supportability of adding Azure VMs to an existing availability set
Applies to: ✔️ Linux VMs ✔️ Windows VMs
You may occasionally encounter limitations when you add new virtual machines (VMs) to an existing availability set. Now, you can use the following REST API service to find what VM sizes are supported in your availability set. Select Try it, and then sign in with your Azure account to run the REST API.
Availability Sets - List Available Sizes - REST API
Reference
The following chart shows some common VM series you can mix in the same availability set.
| Series & Availability Set | Second VM | B-Series | D-Series v2 | D-Series v3 | D-Series v4 | D-Series v5 |
|---|---|---|---|---|---|---|
| First VM | ||||||
| B-Series | OK | OK | OK | OK | OK | |
| D-Series v2 | OK | OK | OK | OK | OK | |
| D-Series v3 | OK | OK | OK | OK | OK | |
| D-Series v4 | OK | OK | OK | OK | OK | |
| D-Series v5 | OK | OK | OK | OK | OK |
All other series could not be in the same availability set because they require a specific hardware.
Contact us for help
If you have questions or need help, create a support request, or ask Azure community support. You can also submit product feedback to Azure feedback community.