<p>Associates the specified KMS key with the specified log group.</p> <p>Associating a KMS key with a log group overrides any existing associations between the log group and a KMS key. After a KMS key is associated with a log group, all newly ingested data for the log group is encrypted using the KMS key. This association is stored as long as the data encrypted with the KMS keyis still within CloudWatch Logs. This enables CloudWatch Logs to decrypt this data whenever it is requested.</p> <important> <p>CloudWatch Logs supports only symmetric KMS keys. Do not use an associate an asymmetric KMS key with your log group. For more information, see <a href="https://docs.aws.amazon.com/kms/latest/developerguide/symmetric-asymmetric.html">Using Symmetric and Asymmetric Keys</a>.</p> </important> <p>It can take up to 5 minutes for this operation to take effect.</p> <p>If you attempt to associate a KMS key with a log group but the KMS key does not exist or the KMS key is disabled, you receive an <code>InvalidParameterException</code> error. </p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}