# Creating required IAM resources for homogeneous data migrations in Amazon DMS
<a name="dm-iam-resources"></a>

To run homogeneous data migrations, you must create an IAM policy and an IAM role in your account to interact with other Amazon services. In this section, you create these required IAM resources.

**Topics**
+ [Creating an IAM policy for homogeneous data migrations in Amazon DMS](#dm-resources-iam-policy)
+ [Creating an IAM role for homogeneous data migrations in Amazon DMS](#dm-resources-iam-role)

## Creating an IAM policy for homogeneous data migrations in Amazon DMS
<a name="dm-resources-iam-policy"></a>

To access your databases and to migrate data, with Amazon DMS, you can create a serverless environment for homogeneous data migrations. Also, Amazon DMS stores logs, metrics, and progress for each data migration in Amazon CloudWatch. To create a data migration project, Amazon DMS needs access to these services.

In this step, you create an IAM policy that provides Amazon DMS with access to Amazon EC2 and CloudWatch resources. Next, create an IAM role and attach this policy.

**To create an IAM policy for homogeneous data migrations in Amazon DMS**

1. Sign in to the Amazon Web Services Management Console and open the IAM console at [https://console.amazonaws.cn/iam/](https://console.amazonaws.cn/iam/).

1. In the navigation pane, choose **Policies**.

1. Choose **Create policy**.

1. In the **Create policy** page, choose the **JSON** tab.

1. Paste the following JSON into the editor.

------
#### [ JSON ]

****  

   ```
   {
       "Version":"2012-10-17",		 	 	 
       "Statement": [
           {
               "Effect": "Allow",
               "Action": [
                   "ec2:DescribeVpcs"
               ],
               "Resource": "*"
           },
           {
               "Effect": "Allow",
               "Action": [
                   "logs:CreateLogGroup"
               ],
               "Resource": "arn:aws-cn:logs:*:*:log-group:dms-data-migration-*"
           },
           {
               "Effect": "Allow",
               "Action": [
                   "logs:CreateLogStream",
                   "logs:PutLogEvents"
               ],
               "Resource": "arn:aws-cn:logs:*:*:log-group:dms-data-migration-*:log-stream:dms-data-migration-*"
           },
           {
               "Effect": "Allow",
               "Action": "cloudwatch:PutMetricData",
               "Resource": "*"
           }
       ]
   }
   ```

------

1. Choose **Next**.

1. Enter **HomogeneousDataMigrationsPolicy** for **Policy name**, and choose **Create policy**.

## Creating an IAM role for homogeneous data migrations in Amazon DMS
<a name="dm-resources-iam-role"></a>

In this step, you create an IAM role that provides Amazon DMS with access to Amazon Secrets Manager, Amazon EC2, and CloudWatch.

When creating an IAM role, you must also create a `dms-vpc-role`. For more information, see [Creating an IAM role for Amazon DMS to manage Amazon VPC](https://docs.amazonaws.cn/AmazonRDS/latest/UserGuide/USER_DMS_migration-IAM.dms-vpc-role.html) in the *Amazon Relational Database Service User Guide*.

**To create an IAM role for homogeneous data migrations in Amazon DMS**

1. Sign in to the Amazon Web Services Management Console and open the IAM console at [https://console.amazonaws.cn/iam/](https://console.amazonaws.cn/iam/).

1. In the navigation pane, choose **Roles**.

1. Choose **Create role**.

1. On the **Select trusted entity** page, for **Trusted entity type**, choose **Amazon Service**. For **Use cases for other Amazon services**, choose **DMS**.

1. Select the **DMS** check box and choose **Next**.

1. On the **Add permissions** page, choose **HomogeneousDataMigrationsPolicy** that you created before.

1. On the **Name, review, and create** page, enter **HomogeneousDataMigrationsRole** for **Role name**, and choose **Create role**.

1. Choose **Update policy**.