ansible/roles/azure/tasks/assign_msi_single_vmss.yml

---
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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#

- name: Assign User assigned Identity to Single VMSS
  azure_rm_resource:
    resource_group: "{{ resource_group }}"
    provider: Compute
    resource_type: virtualMachineScaleSets
    resource_name: "{{ vmss_name }}"
    api_version: '2019-03-01'
    body:
     location: "{{ location }}"
     identity:
       type: UserAssigned
       userAssignedIdentities: "{{ UserAssignedIdentityArr|join('') }}"