# Managing ElastiCache Amazon SNS notifications You can configure ElastiCache to send notifications for important cluster events using Amazon Simple Notification Service (Amazon SNS). In these examples, you will configure a cluster with the Amazon Resource Name (ARN) of an Amazon SNS topic to receive notifications. **Note** This topic assumes that you've signed up for Amazon SNS and have set up and subscribed to an Amazon SNS topic. For information on how to do this, see the [Amazon Simple Notification Service Developer Guide](https://docs.aws.amazon.com/sns/latest/dg/). By default, the `API modify-replication-group` affects all groups in a Region and not just the current specified group. If you want to configure one specific group in a Region differently than the other groups, you can use the `--notification-topic-arn` option to create a separate topic for that group. ## Adding an Amazon SNS topic The following sections show you how to add an Amazon SNS topic using the AWS Console, the AWS CLI, or the ElastiCache API. ### Adding an Amazon SNS topic (Console) The following procedure shows you how to add an Amazon SNS topic for a cluster. When using Valkey or Redis OSS to add an Amazon SNS topic for a replication group in step 2, instead of choosing a cluster, choose a replication group. Then follow the same remaining steps. **Note** This process can also be used to modify the Amazon SNS topic. **To add or modify an Amazon SNS topic for a cluster (Console)** 1. Sign in to the AWS Management Console and open the ElastiCache console at [ https://console.aws.amazon.com/elasticache/](https://console.aws.amazon.com/elasticache/). 1. In ** Clusters**, choose the cluster for which you want to add or modify an Amazon SNS topic ARN. 1. Choose **Modify**. 1. In **Modify Cluster** under **Topic for SNS Notification**, choose the SNS topic you want to add, or choose **Manual ARN input** and type the ARN of the Amazon SNS topic. 1. Choose **Modify**. ### Adding an Amazon SNS topic (AWS CLI) To add or modify an Amazon SNS topic for a cluster, use the AWS CLI command `modify-cache-cluster`. The following code example adds an Amazon SNS topic arn to *my-cluster*. For Linux, macOS, or Unix: ``` aws elasticache modify-cache-cluster \ --cache-cluster-id my-cluster \ --notification-topic-arn arn:aws:sns:us-west-2:123456789xxx:ElastiCacheNotifications ``` For Windows: ``` aws elasticache modify-cache-cluster ^ --cache-cluster-id my-cluster ^ --notification-topic-arn arn:aws:sns:us-west-2:123456789xx:ElastiCacheNotifications ``` For more information, see [modify-cache-cluster](https://docs.aws.amazon.com/cli/latest/reference/elasticache/modify-cache-cluster.html). ### Adding an Amazon SNS topic (ElastiCache API) To add or modify an Amazon SNS topic for a cluster, call the `ModifyCacheCluster` action with the following parameters: + `CacheClusterId``=my-cluster` + `TopicArn``=arn%3Aaws%3Asns%3Aus-west-2%3A565419523791%3AElastiCacheNotifications` **Example** ``` 1. https://elasticache.amazon.com/ 2. ?Action=ModifyCacheCluster 3. &ApplyImmediately=false 4. &CacheClusterId=my-cluster 5. &NotificationTopicArn=arn%3Aaws%3Asns%3Aus-west-2%3A565419523791%3AElastiCacheNotifications 6. &Version=2014-12-01 7. &SignatureVersion=4 8. &SignatureMethod=HmacSHA256 9. &Timestamp=20141201T220302Z 10. &X-Amz-Algorithm=&AWS;4-HMAC-SHA256 11. &X-Amz-Date=20141201T220302Z 12. &X-Amz-SignedHeaders=Host 13. &X-Amz-Expires=20141201T220302Z 14. &X-Amz-Credential= 15. &X-Amz-Signature= ``` For more information, see [ModifyCacheCluster](https://docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_ModifyCacheCluster.html). ## Enabling and disabling Amazon SNS notifications You can turn notifications on or off for a cluster. The following procedures show you how to disable Amazon SNS notifications. ### Enabling and disabling Amazon SNS notifications (Console) **To disable Amazon SNS notifications using the AWS Management Console** 1. Sign in to the AWS Management Console and open the ElastiCache console at [ https://console.aws.amazon.com/elasticache/](https://console.aws.amazon.com/elasticache/). 1. To see a list of your clusters running Memcached, in the navigation pane choose **Memcached**. To see a list of your clusters running Valkey or Redis OSS, in the navigation pane choose **Valkey** or **Redis OSS**. 1. Choose the box to the left of the cluster you want to modify notification for. 1. Choose **Modify**. 1. In **Modify Cluster** under **Topic for SNS Notification**, choose *Disable Notifications*. 1. Choose **Modify**. ### Enabling and disabling Amazon SNS notifications (AWS CLI) To disable Amazon SNS notifications, use the command `modify-cache-cluster` with the following parameters: For Linux, macOS, or Unix: ``` aws elasticache modify-cache-cluster \ --cache-cluster-id my-cluster \ --notification-topic-status inactive ``` For Windows: ``` aws elasticache modify-cache-cluster ^ --cache-cluster-id my-cluster ^ --notification-topic-status inactive ``` **Note** When the cluster belongs to a replication group, you must use the CLI command `modify-replication-group` to enable or disable SNS notifications. ### Enabling and disabling Amazon SNS notifications (ElastiCache API) To disable Amazon SNS notifications, call the `ModifyCacheCluster` action with the following parameters: + `CacheClusterId``=my-cluster` + `NotificationTopicStatus``=inactive` This call returns output similar to the following: **Example** ``` 1. https://elasticache.us-west-2.amazonaws.com/ 2. ?Action=ModifyCacheCluster 3. &ApplyImmediately=false 4. &CacheClusterId=my-cluster 5. &NotificationTopicStatus=inactive 6. &Version=2014-12-01 7. &SignatureVersion=4 8. &SignatureMethod=HmacSHA256 9. &Timestamp=20141201T220302Z 10. &X-Amz-Algorithm=&AWS;4-HMAC-SHA256 11. &X-Amz-Date=20141201T220302Z 12. &X-Amz-SignedHeaders=Host 13. &X-Amz-Expires=20141201T220302Z 14. &X-Amz-Credential= 15. &X-Amz-Signature= ```