Enable Amazon RDS Storage AutoScaling

01 Sign in to AWS Management Console.

02 Navigate to the RDS dashboard at https://console.aws.amazon.com/rds/.

03 In the left navigation panel, under Amazon RDS, click Databases.

04 Choose the RDS database instance that you want to examine and click on the resource name (link) available in the DB identifier column.

05 On the instance details page, select Configuration tab and check the Storage autoscaling configuration attribute value available in the Storage section. If the attribute value is set to Disabled, the RDS Storage AutoScaling feature is not enabled for the selected Amazon RDS database instance.

06 Repeat step no. 4 and 5 to check the RDS Storage AutoScaling status for other database instances provisioned in the current region.

07 Change the AWS region from the navigation bar and repeat the process for other regions.

01 Run describe-db-instances command (OSX/Linux/UNIX) using custom query filters to list the names (identifiers) of all RDS database instances available in the selected AWS region:

aws rds describe-db-instances
	--region us-east-1
	--output table
	--query 'DBInstances[*].DBInstanceIdentifier'

02 The command output should return a table with the requested RDS instance names:

-----------------------------
|    DescribeDBInstances    |
+---------------------------+
|   cc-mysql-db-instance    |
|   cc-aurora-db-instance   |
+---------------------------+

03 Execute describe-db-instances command (OSX/Linux/UNIX) using the name of the database instance that you want to examine as identifier parameter and custom query filters to get the maximum allocated storage threshold configured for the RDS Storage AutoScaling feature, for the selected RDS database instance:

aws rds describe-db-instances
	--region us-east-1
	--db-instance-identifier cc-mysql-db-instance
	--query 'DBInstances[*].MaxAllocatedStorage'

04 The command output should return the maximum storage threshold configured:

[]

05 Repeat step no. 3 and 4 to determine the RDS Storage AutoScaling status for other database instances available in the selected region.

06 Change the AWS region by updating the --region command parameter value and repeat steps no. 1 – 5 to perform the audit process for other regions.

01 Sign in to AWS Management Console.

02 Navigate to the RDS dashboard at https://console.aws.amazon.com/rds/.

03 In the left navigation panel, under Amazon RDS, click Databases.

04 Select the RDS database instance that you want to reconfigure (see Audit section part I to identify the right resource).

05 Click the Modify button from the RDS dashboard top menu.

06 On the Modify DB Instance: <instance-identifier> page, within Instance specifications section, perform the following commands:

1. Under Storage autoscaling, select Enable storage autoscaling checkbox to activate the RDS Storage AutoScaling feature for the selected database instance.
2. For Maximum storage threshold, provide the maximum storage threshold required by planned workload of the selected database instance.
3. Click Continue to continue the reconfiguration process.

07 Within the Summary of modifications section, carefully review the configuration changes that you want to apply to the instance.

08 In the Scheduling of modifications section, perform one of the following actions based on your requirements:

1. Select Apply during the next scheduled maintenance window to apply the changes automatically during the next scheduled maintenance window.
2. Select Apply immediately to apply the changes right away. With this option any pending modifications will be asynchronously applied as soon as possible, regardless of the maintenance window setting for this RDS database instance. Note that any changes available in the pending modifications queue are also applied. If any of the pending modifications require downtime, choosing this option can cause unexpected downtime for your application.

09 Click Modify DB Instance to apply the configuration changes. Once the Storage AutoScaling feature is enabled, Amazon RDS would start a storage modification for the specified database instance when these factors apply:

• Free available space is less than 10 percent of the allocated instance storage.
• The low-storage condition lasts at least 5 minutes.
• At least 6 hours have passed since the last storage modification.

The additional storage is in increments of whichever of the following is greater:

• 5 GiB.
• 10 percent of currently allocated instance storage.
• Storage growth prediction based on the "FreeStorageSpace" metrics change in the past hour.

10 Repeat steps no. 4 – 9 to enable RDS Storage AutoScaling for other Amazon RDS database instances provisioned in the current region.

11 Change the AWS region from the navigation bar and repeat the process for other regions.

01 Run modify-db-instance command (OSX/Linux/UNIX) to enable the Amazon RDS Storage AutoScaling feature for the selected database instance (see Audit section part II to identify the right instance) by setting the upper limit on storage size, in GiB, using the --max-allocated-storage parameter. The following command example makes use of --apply-immediately parameter to apply the configuration changes asynchronously, as soon as possible. Any changes available in the pending modifications queue are also applied with this request. If any of the pending modifications require downtime, choosing this option can cause unexpected downtime for your application. If you skip adding the --apply-immediately parameter to the command request, Amazon RDS service will apply your changes during the next maintenance window:

aws rds modify-db-instance
	--region us-east-1
	--db-instance-identifier cc-mysql-db-instance
	--max-allocated-storage 150
	--apply-immediately

02 The command output should return the new configuration metadata for the modified RDS database instance:

{
    "DBInstance": {
        "PubliclyAccessible": false,
        "LicenseModel": "general-public-license",
        "InstanceCreateTime": "2020-01-08T10:02:29.921Z",
        "PendingModifiedValues": {},
        "Engine": "mysql",
        "LatestRestorableTime": "2020-01-08T11:10:00Z",
        "DBInstanceStatus": "available",
        "IAMDatabaseAuthenticationEnabled": false,
        "EngineVersion": "5.7.22",

        ...

        "MaxAllocatedStorage": 60,

        ...

        "DeletionProtection": false,
        "AvailabilityZone": "us-east-1a",
        "DomainMemberships": [],
        "StorageType": "gp2",
        "CACertificateIdentifier": "rds-ca-2019",
        "StorageEncrypted": true,
        "AssociatedRoles": [],
        "DBInstanceClass": "db.m3.medium",
        "DBInstanceIdentifier": "cc-mysql-db-instance"
    }
}

03 Repeat step no. 1 and 2 to enable RDS Storage AutoScaling for other Amazon RDS database instances available in the selected region.

04 Change the AWS region by updating the --region command parameter value and repeat the entire process for other regions.