name : create-custom-log-source.rst **To add a custom source as an Amazon Security Lake source** The following ``create-custom-logsource`` example adds a custom source as a Security Lake source in the designated log provider account and the designated Region. :: aws securitylake create-custom-log-source \ --source-name "VPC_FLOW" \ --event-classes '["DNS_ACTIVITY", "NETWORK_ACTIVITY"]' \ --configuration '{"crawlerConfiguration": {"roleArn": "arn:aws:glue:eu-west-2:123456789012:crawler/E1WG1ZNPRXT0D4"},"providerIdentity": {"principal": "029189416600","externalId": "123456789012"}}' --region "us-east-1" Output:: { "customLogSource": { "attributes": { "crawlerArn": "arn:aws:glue:eu-west-2:123456789012:crawler/E1WG1ZNPRXT0D4", "databaseArn": "arn:aws:glue:eu-west-2:123456789012:database/E1WG1ZNPRXT0D4", "tableArn": "arn:aws:glue:eu-west-2:123456789012:table/E1WG1ZNPRXT0D4" }, "provider": { "location": "amzn-s3-demo-bucket--usw2-az1--x-s3", "roleArn": "arn:aws:iam::123456789012:role/AmazonSecurityLake-Provider-testCustom2-eu-west-2" }, "sourceName": "testCustom2" "sourceVersion": "2.0" } } For more information, see `Adding a custom source <https://docs.aws.amazon.com/security-lake/latest/userguide/custom-sources.html#adding-custom-sources>`__ in the *Amazon Security Lake User Guide*.