Migrate a Batch pool with low-priority compute nodes or create a Batch pool with Spot instances

Question

Migrate a Batch pool with low-priority compute nodes or create a Batch pool with Spot instances

Daniel-4204 65

I received the “Migrate a Batch pool with low-priority compute nodes or create a Batch pool with Spot instances” email, listing affected Azure Batch resources across multiple subscriptions. I have reviewed the support documentation and confirmed that all child link prerequisites are satisfied.

At this point, I believe I’m at the final step of the migration process. However, when examining the affected resource, I’m unclear on how changing the available settings satisfies the migration requirement.

Specifically, in the resource settings, I noticed that the field “Target Spot/low-priority nodes” combines both low-priority and Spot instances into a single line item. Given that they are merged into one field, I don’t see an explicit option to migrate low-priority nodes to Spot instances; only a numerical value representing the total number of nodes.

How should I proceed to ensure the migration is correctly applied? Has anyone encountered this issue before and can offer guidance?

Thanks in advance for any insights!

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Markapuram Sudheer Reddy 1,670 Reputation points Microsoft External Staff

2025-03-07T20:17:21.8266667+00:00

Hi Daniel-4204,

Thank You for reaching out to Microsoft Q&A forum.

Ensure your Batch account uses the user subscription pool allocation mode to support Spot instances. Because of transition phase, the combined field "Target Spot/low-priority nodes" allows you to manage both types of nodes during this transition. So, migrate the workloads to be transitioned to Spot instances for continue operating.

https://learn.microsoft.com/en-us/azure/batch/batch-account-create-portal

https://learn.microsoft.com/en-us/azure/batch/low-priority-vms-retirement-migration-guide

If the information is helpful, please click on "Upvote"

If you have any queries, please do let us know, we will help you.
Markapuram Sudheer Reddy 1,670 Reputation points Microsoft External Staff

2025-03-11T00:29:53.94+00:00

Hi Daniel-4204,

I wanted to follow up regarding above response to your query.

If you have any questions, please do let us know, we will help you.
Markapuram Sudheer Reddy 1,670 Reputation points Microsoft External Staff

2025-03-12T00:14:25.4666667+00:00

Hi Daniel-4204,

I wanted to follow up regarding above response to your query.

If you have any questions, please do let us know, we will help you.
Daniel-4204 65 Reputation points

2025-03-14T14:35:00.04+00:00

Hi @Markapuram Sudheer Reddy

I have followed / completed all of the steps, including accpepting marketplace terms.

https://learn.microsoft.com/en-us/azure/batch/low-priority-vms-retirement-migration-guide

https://learn.microsoft.com/en-us/azure/batch/batch-account-create-portal

How can I visually confirm that my Low Priority Nodes have successfully transitioned to Spot Nodes after accepting the Marketplace terms, and prereqs outlined in the links above? How do I verify if the migration was successful when the field for Low Priority and Spot VMs is a shared field?
Daniel-4204 65 Reputation points

2025-03-14T14:55:11.91+00:00

Hi @Markapuram Sudheer Reddy

How do I confirm (visually) that the Low Priority Nodes are indeed now, "Spot" nodes since accepting the terms? I’m still unsure how to definitively confirm whether the migration has successfully taken place. Any insights would be appreciated.

This is a test account. If this will work, I have 2 accounts in a production environment to replicate these steps in.
Daniel-4204 65 Reputation points

2025-03-18T13:20:31.0733333+00:00

@Markapuram Sudheer Reddy Thank you for following up to my inquiry. I was unable to respond the days you replied. I have privided a response and still need assistance. How do I confirm (visually) that the Low Priority Nodes are indeed now, "Spot" nodes since accepting the terms as shown in my response above?

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Markapuram Sudheer Reddy 1,670 Reputation points Microsoft External Staff

2025-03-07T20:17:21.8266667+00:00

Hi Daniel-4204,

Thank You for reaching out to Microsoft Q&A forum.

Ensure your Batch account uses the user subscription pool allocation mode to support Spot instances. Because of transition phase, the combined field "Target Spot/low-priority nodes" allows you to manage both types of nodes during this transition. So, migrate the workloads to be transitioned to Spot instances for continue operating.

https://learn.microsoft.com/en-us/azure/batch/batch-account-create-portal

https://learn.microsoft.com/en-us/azure/batch/low-priority-vms-retirement-migration-guide

If the information is helpful, please click on "Upvote"

If you have any queries, please do let us know, we will help you.
Markapuram Sudheer Reddy 1,670 Reputation points Microsoft External Staff

2025-03-11T00:29:53.94+00:00

Hi Daniel-4204,

I wanted to follow up regarding above response to your query.

If you have any questions, please do let us know, we will help you.
Markapuram Sudheer Reddy 1,670 Reputation points Microsoft External Staff

2025-03-12T00:14:25.4666667+00:00

Hi Daniel-4204,

I wanted to follow up regarding above response to your query.

If you have any questions, please do let us know, we will help you.
Daniel-4204 65 Reputation points

2025-03-14T14:35:00.04+00:00

Hi @Markapuram Sudheer Reddy

I have followed / completed all of the steps, including accpepting marketplace terms.

https://learn.microsoft.com/en-us/azure/batch/low-priority-vms-retirement-migration-guide

https://learn.microsoft.com/en-us/azure/batch/batch-account-create-portal

How can I visually confirm that my Low Priority Nodes have successfully transitioned to Spot Nodes after accepting the Marketplace terms, and prereqs outlined in the links above? How do I verify if the migration was successful when the field for Low Priority and Spot VMs is a shared field?
Daniel-4204 65 Reputation points

2025-03-14T14:55:11.91+00:00

Hi @Markapuram Sudheer Reddy

How do I confirm (visually) that the Low Priority Nodes are indeed now, "Spot" nodes since accepting the terms? I’m still unsure how to definitively confirm whether the migration has successfully taken place. Any insights would be appreciated.

This is a test account. If this will work, I have 2 accounts in a production environment to replicate these steps in.
Daniel-4204 65 Reputation points

2025-03-18T13:20:31.0733333+00:00

@Markapuram Sudheer Reddy Thank you for following up to my inquiry. I was unable to respond the days you replied. I have privided a response and still need assistance. How do I confirm (visually) that the Low Priority Nodes are indeed now, "Spot" nodes since accepting the terms as shown in my response above?

Answer 1

Hello Daniel-4204, there are two ways to ensure the migration from Low-Priority nodes to Spot instances is correctly applied and visually confirm the migration in Azure.

As you rightly pointed out that Azure Batch now treats Spot and Low-Priority nodes as the same field, the verification can be done either from CLI or Portal.

Your first question- How Should I Proceed to Ensure the Migration is Correctly Applied?

Answer- If you are trying this from CLI the run the below command


az batch pool show \

    --account-name <your-batch-account-name> \

    --account-endpoint "https://<your-batch-account-name>.<region>.batch.azure.com" \

    --pool-id <your-pool-id> \

    --query "{PoolID:id, VMSize:vmSize, SpotNodes:scaleSettings.targetLowPriorityNodes}"

If the migration is in progress you should see

enter image description here

Once completed you will see along with the spot nodes

enter image description here

and from portal you already know where to check from as you have already highlighted in your screenshot-

enter image description here

Second question- How to Visually Confirm the Migration from Low-Priority to Spot Instances?

Answer- Again this can be verified from CLI


az batch node list \

    --account-name <your-batch-account-name> \

    --account-endpoint "https://<your-batch-account-name>.<region>.batch.azure.com" \

    --pool-id <your-pool-id> \

    --query "[].{ID:id, State:state, SchedulingState:schedulingState}"

or from portal

enter image description here

If nodes exist in "idle" or "running", the migration was successful.

Therefore, to understand if things are working as intended, confirm that the pool is using Spot instances using az batch pool show then you can check spot quotas using az vm list-usage and request an increase if needed and finally visually verify migration in Portal under Pools > Scale > Target Spot/Low-Priority Nodes.

enter image description here

Microsoft document

Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

Daniel-4204 65 Reputation points

2025-03-19T18:14:51.62+00:00

@Arko Thank you for clarifying these points. May I suggest asking the document owners to update the support documentation regarding how to verify the migration status? I imagine this would greatly assist those tasked with completing the migration by September 30th, particularly in understanding the Shared Value of Spot/LowPriority and steps for CLI and Portal for confirming that the migration was successful.

Thank you again

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Migrate a Batch pool with low-priority compute nodes or create a Batch pool with Spot instances

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