Virtual Machine Scale Set VM Extensions - Create Or Update

PUT https://management.azure.com/subscriptions/{subscription-id}/resourceGroups/myResourceGroup/providers/Microsoft.Compute/virtualMachineScaleSets/myvmScaleSet/virtualMachines/0/extensions/myVMExtension?api-version=2026-04-01

{
  "properties": {
    "autoUpgradeMinorVersion": true,
    "publisher": "extPublisher",
    "type": "extType",
    "typeHandlerVersion": "1.2",
    "settings": {
      "UserName": "xyz@microsoft.com"
    }
  }
}

import com.azure.core.management.serializer.SerializerFactory;
import com.azure.core.util.serializer.SerializerEncoding;
import com.azure.resourcemanager.compute.fluent.models.VirtualMachineScaleSetVMExtensionInner;
import java.io.IOException;

/**
 * Samples for VirtualMachineScaleSetVMExtensions CreateOrUpdate.
 */
public final class Main {
    /*
     * x-ms-original-file: 2026-04-01/virtualMachineScaleSetExamples/VirtualMachineScaleSetVMExtension_Create.json
     */
    /**
     * Sample code: Create VirtualMachineScaleSet VM extension.
     * 
     * @param manager Entry point to ComputeManager.
     */
    public static void createVirtualMachineScaleSetVMExtension(com.azure.resourcemanager.compute.ComputeManager manager)
        throws IOException {
        manager.serviceClient().getVirtualMachineScaleSetVMExtensions().createOrUpdate("myResourceGroup",
            "myvmScaleSet", "0", "myVMExtension",
            new VirtualMachineScaleSetVMExtensionInner().withPublisher("extPublisher").withTypePropertiesType("extType")
                .withTypeHandlerVersion("1.2").withAutoUpgradeMinorVersion(true)
                .withSettings(SerializerFactory.createDefaultManagementSerializerAdapter()
                    .deserialize("{\"UserName\":\"xyz@microsoft.com\"}", Object.class, SerializerEncoding.JSON)),
            com.azure.core.util.Context.NONE);
    }
}

To use the Azure SDK library in your project, see this documentation. To provide feedback on this code sample, open a GitHub issue

from azure.identity import DefaultAzureCredential

from azure.mgmt.compute import ComputeManagementClient

"""
# PREREQUISITES
    pip install azure-identity
    pip install azure-mgmt-compute
# USAGE
    python virtual_machine_scale_set_vm_extension_create.py

    Before run the sample, please set the values of the client ID, tenant ID and client secret
    of the AAD application as environment variables: AZURE_CLIENT_ID, AZURE_TENANT_ID,
    AZURE_CLIENT_SECRET. For more info about how to get the value, please see:
    https://docs.microsoft.com/azure/active-directory/develop/howto-create-service-principal-portal
"""


def main():
    client = ComputeManagementClient(
        credential=DefaultAzureCredential(),
        subscription_id="SUBSCRIPTION_ID",
    )

    response = client.virtual_machine_scale_set_vm_extensions.begin_create_or_update(
        resource_group_name="myResourceGroup",
        vm_scale_set_name="myvmScaleSet",
        instance_id="0",
        vm_extension_name="myVMExtension",
        extension_parameters={
            "properties": {
                "autoUpgradeMinorVersion": True,
                "publisher": "extPublisher",
                "settings": {"UserName": "xyz@microsoft.com"},
                "type": "extType",
                "typeHandlerVersion": "1.2",
            }
        },
    ).result()
    print(response)


# x-ms-original-file: 2026-04-01/virtualMachineScaleSetExamples/VirtualMachineScaleSetVMExtension_Create.json
if __name__ == "__main__":
    main()

To use the Azure SDK library in your project, see this documentation. To provide feedback on this code sample, open a GitHub issue

package armcompute_test

import (
	"context"
	"log"

	"github.com/Azure/azure-sdk-for-go/sdk/azcore/to"
	"github.com/Azure/azure-sdk-for-go/sdk/azidentity"
	"github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/compute/armcompute/v8"
)

// Generated from example definition: 2026-04-01/virtualMachineScaleSetExamples/VirtualMachineScaleSetVMExtension_Create.json
func ExampleVirtualMachineScaleSetVMExtensionsClient_BeginCreateOrUpdate() {
	cred, err := azidentity.NewDefaultAzureCredential(nil)
	if err != nil {
		log.Fatalf("failed to obtain a credential: %v", err)
	}
	ctx := context.Background()
	clientFactory, err := armcompute.NewClientFactory("{subscription-id}", cred, nil)
	if err != nil {
		log.Fatalf("failed to create client: %v", err)
	}
	poller, err := clientFactory.NewVirtualMachineScaleSetVMExtensionsClient().BeginCreateOrUpdate(ctx, "myResourceGroup", "myvmScaleSet", "0", "myVMExtension", armcompute.VirtualMachineScaleSetVMExtension{
		Properties: &armcompute.VirtualMachineExtensionProperties{
			AutoUpgradeMinorVersion: to.Ptr(true),
			Publisher:               to.Ptr("extPublisher"),
			Type:                    to.Ptr("extType"),
			TypeHandlerVersion:      to.Ptr("1.2"),
			Settings: map[string]any{
				"UserName": "xyz@microsoft.com",
			},
		},
	}, nil)
	if err != nil {
		log.Fatalf("failed to finish the request: %v", err)
	}
	res, err := poller.PollUntilDone(ctx, nil)
	if err != nil {
		log.Fatalf("failed to poll the result: %v", err)
	}
	// You could use response here. We use blank identifier for just demo purposes.
	_ = res
	// If the HTTP response code is 200 as defined in example definition, your response structure would look as follows. Please pay attention that all the values in the output are fake values for just demo purposes.
	// res = armcompute.VirtualMachineScaleSetVMExtensionsClientCreateOrUpdateResponse{
	// 	VirtualMachineScaleSetVMExtension: armcompute.VirtualMachineScaleSetVMExtension{
	// 		Name: to.Ptr("myVMExtension"),
	// 		Type: to.Ptr("Microsoft.Compute/virtualMachineScaleSets/virtualMachines/extensions"),
	// 		ID: to.Ptr("/subscriptions/{subscriptionId}/resourceGroups/myResourceGroup/providers/Microsoft.Compute/virtualMachineScaleSets/myvmScaleSet/virtualMachines/0/extensions/myVMExtension"),
	// 		Properties: &armcompute.VirtualMachineExtensionProperties{
	// 			AutoUpgradeMinorVersion: to.Ptr(true),
	// 			ProvisioningState: to.Ptr("Creating"),
	// 			Publisher: to.Ptr("extPublisher"),
	// 			Type: to.Ptr("extType"),
	// 			TypeHandlerVersion: to.Ptr("1.2"),
	// 			Settings: map[string]any{
	// 				"UserName": "xyz@microsoft.com",
	// 			},
	// 		},
	// 	},
	// }
}

To use the Azure SDK library in your project, see this documentation. To provide feedback on this code sample, open a GitHub issue

const { ComputeManagementClient } = require("@azure/arm-compute");
const { DefaultAzureCredential } = require("@azure/identity");

/**
 * This sample demonstrates how to the operation to create or update the VMSS VM extension.
 *
 * @summary the operation to create or update the VMSS VM extension.
 * x-ms-original-file: 2026-04-01/virtualMachineScaleSetExamples/VirtualMachineScaleSetVMExtension_Create.json
 */
async function createVirtualMachineScaleSetVMExtension() {
  const credential = new DefaultAzureCredential();
  const subscriptionId = "{subscription-id}";
  const client = new ComputeManagementClient(credential, subscriptionId);
  const result = await client.virtualMachineScaleSetVMExtensions.createOrUpdate(
    "myResourceGroup",
    "myvmScaleSet",
    "0",
    "myVMExtension",
    {
      autoUpgradeMinorVersion: true,
      publisher: "extPublisher",
      typePropertiesType: "extType",
      typeHandlerVersion: "1.2",
      settings: { UserName: "xyz@microsoft.com" },
    },
  );
  console.log(result);
}

To use the Azure SDK library in your project, see this documentation. To provide feedback on this code sample, open a GitHub issue