**To validate configuration settings**

The following command validates a CloudWatch custom metrics config document::

  aws elasticbeanstalk validate-configuration-settings --application-name my-app --environment-name my-env --option-settings file://options.json

``options.json`` is a JSON document that includes one or more configuration settings to validate::

  [
      {
          "Namespace": "aws:elasticbeanstalk:healthreporting:system",
          "OptionName": "ConfigDocument",
          "Value": "{\"CloudWatchMetrics\": {\"Environment\": {\"ApplicationLatencyP99.9\": null,\"InstancesSevere\": 60,\"ApplicationLatencyP90\": 60,\"ApplicationLatencyP99\": null,\"ApplicationLatencyP95\": 60,\"InstancesUnknown\": 60,\"ApplicationLatencyP85\": 60,\"InstancesInfo\": null,\"ApplicationRequests2xx\": null,\"InstancesDegraded\": null,\"InstancesWarning\": 60,\"ApplicationLatencyP50\": 60,\"ApplicationRequestsTotal\": null,\"InstancesNoData\": null,\"InstancesPending\": 60,\"ApplicationLatencyP10\": null,\"ApplicationRequests5xx\": null,\"ApplicationLatencyP75\": null,\"InstancesOk\": 60,\"ApplicationRequests3xx\": null,\"ApplicationRequests4xx\": null},\"Instance\": {\"ApplicationLatencyP99.9\": null,\"ApplicationLatencyP90\": 60,\"ApplicationLatencyP99\": null,\"ApplicationLatencyP95\": null,\"ApplicationLatencyP85\": null,\"CPUUser\": 60,\"ApplicationRequests2xx\": null,\"CPUIdle\": null,\"ApplicationLatencyP50\": null,\"ApplicationRequestsTotal\": 60,\"RootFilesystemUtil\": null,\"LoadAverage1min\": null,\"CPUIrq\": null,\"CPUNice\": 60,\"CPUIowait\": 60,\"ApplicationLatencyP10\": null,\"LoadAverage5min\": null,\"ApplicationRequests5xx\": null,\"ApplicationLatencyP75\": 60,\"CPUSystem\": 60,\"ApplicationRequests3xx\": 60,\"ApplicationRequests4xx\": null,\"InstanceHealth\": null,\"CPUSoftirq\": 60}},\"Version\": 1}"
      }
  ]

If the options that you specify are valid for the specified environment, Elastic Beanstalk returns an empty Messages array::

  {
      "Messages": []
  }

If validation fails, the response will include information about the error::

  {
      "Messages": [
          {
              "OptionName": "ConfigDocumet",
              "Message": "Invalid option specification (Namespace: 'aws:elasticbeanstalk:healthreporting:system', OptionName: 'ConfigDocumet'): Unknown configuration setting.",
              "Namespace": "aws:elasticbeanstalk:healthreporting:system",
              "Severity": "error"
          }
      ]
  }


For more information about namespaces and supported options, see `Option Values`_ in the *AWS Elastic Beanstalk Developer Guide*.

.. _`Option Values`: http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/command-options.html