**To create a logger definition version**

The following ``create-logger-definition-version`` example creates a logger definition version and associates it with a logger definition. The version defines four logging configurations: 1) system component logs on the file system of the core device, 2) user-defined Lambda function logs on the file system of the core device, 3) system component logs in Amazon CloudWatch Logs, and 4) user-defined Lambda function logs in Amazon CloudWatch Logs. Note: For CloudWatch Logs integration, your group role must grant appropriate permissions. ::

    aws greengrass create-logger-definition-version \
        --logger-definition-id "a454b62a-5d56-4ca9-bdc4-8254e1662cb0" \
        --loggers "[{\"Id\":\"1\",\"Component\":\"GreengrassSystem\",\"Level\":\"ERROR\",\"Space\":10240,\"Type\":\"FileSystem\"},{\"Id\":\"2\",\"Component\":\"Lambda\",\"Level\":\"INFO\",\"Space\":10240,\"Type\":\"FileSystem\"},{\"Id\":\"3\",\"Component\":\"GreengrassSystem\",\"Level\":\"WARN\",\"Type\":\"AWSCloudWatch\"},{\"Id\":\"4\",\"Component\":\"Lambda\",\"Level\":\"INFO\",\"Type\":\"AWSCloudWatch\"}]"

Output::

   {
    "Arn": "arn:aws:greengrass:us-west-2:123456789012:/greengrass/definition/loggers/a454b62a-5d56-4ca9-bdc4-8254e1662cb0/versions/49aedb1e-01a3-4d39-9871-3a052573f1ea",
    "Version": "49aedb1e-01a3-4d39-9871-3a052573f1ea",
    "CreationTimestamp": "2019-07-24T00:04:48.523Z",
    "Id": "a454b62a-5d56-4ca9-bdc4-8254e1662cb0"
   }

For more information, see `Monitoring with AWS IoT Greengrass Logs <https://docs.aws.amazon.com/greengrass/latest/developerguide/greengrass-logs-overview.html>`__ in the *AWS IoT Greengrass Developer Guide*.