CTS is interconnected with the DNS service to record operations performed by users in real time. Actions and results of the operations are stored in OBS buckets in the form of traces.

After you enable CTS, whenever a DNS API is called, the operation is recorded in a log file, which is then delivered to a specified OBS bucket for storage.

Table 1 and Table 2 list the DNS operations that will be recorded by CTS.

The DNS service involves resources both at the global and region levels. Table 1 lists DNS operations at the global level. Traces of these operations are displayed only in the primary region.

Table 2 lists DNS operations at the region level. Traces of these operations are displayed in the regions where the operations are performed.

**Table 1** Global-level DNS operations that can be recorded by CTS
Operation	Resource Type	Trace Name
Creating a record set for a public zone	publicRecordSet	createPublicRecordSet
Deleting a record set of a public zone	publicRecordSet	deletePublicRecordSet
Modifying a record set of a public zone	publicRecordSet	updatePublicRecordSet
Creating a public zone	publicZone	createPublicZone
Modifying a public zone	publicZone	updatePublicZone
Deleting a public zone	publicZone	deletePublicZone
Adding tags to a public zone	publicZoneTag	createPublicZoneTag
Deleting tags from a public zone	publicZoneTag	deletePublicZoneTag
Adding tags to a record set in a public zone	publicRecordSetTag	createPublicRecordSetTag
Deleting tags of a record set in a public zone	publicRecordSetTag	deletePublicRecordSetTag
Adding tags to a private zone	privateZoneTag	createPrivateZoneTag
Deleting tags from a private zone	privateZoneTag	deletePrivateZoneTag
Adding tags to a record set in a private zone	privateRecordSetTag	createPrivateRecordSetTag
Deleting tags from a record set in a private zone	privateRecordSetTag	deletePrivateRecordSetTag
Adding tags to a PTR record	ptrRecordTag	createPTRRecordSetTag
Deleting tags of a PTR record	ptrRecordTag	deletePTRRecordTag

**Table 2** Region-level DNS operations that can be recorded by CTS
Operation	Resource Type	Trace Name
Creating a record set in a private zone	privateRecordSet	createPrivateRecordSet
Deleting a record set in a private zone	privateRecordSet	deletePrivateRecordSet
Modifying a record set of a private zone	privateRecordSet	updatePrivateRecordSet
Creating a private zone	privateZone	createPrivateZone
Modifying a private zone	privateZone	updatePrivateZone
Deleting a private zone	privateZone	deletePrivateZone
Associating a VPC with a private zone	privateZone	associateRouter
Disassociating a VPC from a private zone	privateZone	disassociateRouter
Configuring a PTR record	ptrRecord	setPTRRecord
Deleting a PTR record	ptrRecord	resetPTRRecord

DNS Operations Recorded by CTS