Addressing stale AWS Config items in the ServiceNow CMDB

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Addressing stale AWS Config items in the ServiceNow CMDB - AWS Service Management Connector

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Note

ServiceNow administrators are the target audience for this section.

In addition to the AWS Config settings, AWS SMC for ServiceNow now exposes a global API to identify stale config items from the AWS Config integration.

Stale Config items are the existing AWS Config items that did not update during the most recent sync for the same source (such as account, Region, and Aggregator name).

Note

This feature requires you to enable the creation relationship to sync the status setting in the AWS Config System Properties in the ServiceNow scoped app.

The script includes x_126749_aws_sc.AwsSmc and exposes a public API. You can use this script to access any application scope, including global scope. As an example, run this script:



   x_126749_aws_sc.AwsSmc.asSyncUser().getStaleConfigItems().forAll(function(object)
{
  gs.info(
       object.accountNumber + '/' + object.region + ' '
       + (object.aggregatorName ? 'aggregator: ' + object.aggregatorName + ' ' :
'')
       + 'ci: ' + object.ci.name
       + ' - ' + object.ci.getDisplayValue('install_status')
  );
});

As a background script, it would log the following:


Info: 11111111/us-east-1 ci: i-1234567fg6j8 - Installed
Info: 11111111/us-west-1 ci: i-9876541fdgfd - Installed
Info: 22222222/eu-west-1 aggregator: all-dev ci: i-1df5235ftt55 - Installed

Each object contains the properties below:

Property	Type	Description
`accountNumber`	String	The account number from which the stale config item originates.
`region`	String	The Region from which the stale config item originates.
`aggregatorName`	String	The Aggregator name (if applicable) from which the stale config item originates.
`lastSynced`	`GlideDateTime`	The `GlideDateTime` of the when the last synchronization occurred.
`CI`	`GlideRecord`	The `GlideRecord` of the stale config item.

Optionally, you can also pass an options object as the second argument to the forAll method that allows you to customize the search for stale items.

Property	Type	Description
`lowerTimeLimit`	`GlideDateTime`	The threshold `GlideDateTime` from when you should search items. Any stale item last updated prior to that date does not return.
`upperTimeLimit`	`GlideDateTime`	The threshold `GlideDateTime` until you should search for items. Any item last updated after that date does not return.
`excludeStatus`	Number	The `install_status` to filter on.

Timestamps of sync resources:

LastSyncTimeField(default checked_in): The start of the current sync process.
first_discovered (for new records): The current time. We set the LastDiscoveredField (default last_discovered) to the configurationItemCaptureTime of the resource, if it exists or is undefined.

Additional notes on stale records

When AWS Service Management Connector reads AWS Config records that refer to other resources, it often creates a relationship to those resources.

In some cases, the related resource does not have an entry in the ServiceNow CMDB. In these cases, the Connector creates a record for that relationship, with an install status of absent. When the Connector reads the AWS Config record for the related resource, that record populates.

To see active resources, you should filter ServiceNow records synced from AWS Config by an install status of not Absent.

Disclaimer

Because the script compares items linked to stale sync records, it is unable to identify stale resources synced before the installation of this SMC version. When switching to sync with an Aggregator or switching from Aggregator sync to non-Aggregator sync, the script also fails to detect items that became stale between the last non-Aggregator sync and the first Aggregator sync.