# redshift-cluster-maintenancesettings-check
<a name="redshift-cluster-maintenancesettings-check"></a>

Checks if Amazon Redshift clusters have the specified maintenance settings. The rule is NON\$1COMPLIANT if the automatic upgrades to major version is disabled. 



**Identifier:** REDSHIFT\$1CLUSTER\$1MAINTENANCESETTINGS\$1CHECK

**Resource Types:** AWS::Redshift::Cluster

**Trigger type:** Configuration changes

**AWS Region:** All supported AWS regions except Mexico (Central) Region

**Parameters:**

allowVersionUpgradeType: booleanDefault: true  
Allow version upgrade is enabled.

preferredMaintenanceWindow (Optional)Type: String  
Scheduled maintenance window for clusters (for example, Mon:09:30-Mon:10:00).

automatedSnapshotRetentionPeriod (Optional)Type: intDefault: 1  
Number of days to retain automated snapshots.

## Proactive Evaluation
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 For steps on how to run this rule in proactive mode, see [Evaluating Your Resources with AWS Config Rules](./evaluating-your-resources.html#evaluating-your-resources-proactive). For this rule to return COMPLIANT in proactive mode, the resource configuration schema for the [StartResourceEvaluation](https://docs.aws.amazon.com/config/latest/APIReference/API_StartResourceEvaluation.html) API needs to include the following inputs, encoded as a string: 

```
"ResourceConfiguration":
...
{
    "AutomatedSnapshotRetentionPeriod": Integer*,
    "PreferredMaintenanceWindow": String*,
    "AllowVersionUpgrade": BOOLEAN*
} 
...
```

\$1For more information on valid values for these inputs, see [AutomatedSnapshotRetentionPeriod](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-redshift-cluster.html#cfn-redshift-cluster-automatedsnapshotretentionperiod), [PreferredMaintenanceWindow](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-redshift-cluster.html#cfn-redshift-cluster-preferredmaintenancewindow), and [AllowVersionUpgrade](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-redshift-cluster.html#cfn-redshift-cluster-allowversionupgrade) in the AWS CloudFormation User Guide.

 For more information on proactive evaluation, see [Evaluation Mode](./evaluate-config-rules.html). 

## AWS CloudFormation template
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To create AWS Config managed rules with AWS CloudFormation templates, see [Creating AWS Config Managed Rules With AWS CloudFormation Templates](aws-config-managed-rules-cloudformation-templates.md).