# IMS Operations Recorded by CTS

#### Scenarios

Cloud Trace Service (CTS) is a log audit service provided by the public cloud and intended for cloud security. It allows you to collect, store, and query cloud resource operation records and use these records for security analysis, compliance auditing, resource tracking, and fault locating.

You can use CTS to record IMS operations for later querying, auditing, and backtracking.

#### Prerequisites

You need to enable CTS before using it. If it is not enabled, IMS operations cannot be recorded. After being enabled, CTS automatically creates a tracker to record all your operations. The tracker stores only the operations of the last seven days. To store the operations for a longer time, store trace files in OBS buckets.

#### IMS Operations Recorded by CTS

Table 1 IMS operations that can be recorded by CTS
Operation | Resource Type | Trace Name
--- | --- | ---
Creating an Image | ims | createImage
Modifying an image | ims | updateImage
Deleting images in a batch | ims | deleteImage
Replicating an image | ims | copyImage
Exporting an image | ims | exportImage
Adding a tenant that can use a shared image | ims | addMember
Modifying tenants that can use a shared image | ims | updateMember
Deleting tenants from the group where the members can use a shared image | ims | deleteMemeber

Table 2 Relationship between IMS operations and native OpenStack APIs
Operation | Trace Name | Service Type | Resource Type | OpenStack Component
--- | --- | --- | --- | ---
Creating an Image | createImage | IMS | image | glance
Modifying/Uploading an image | updateImage | IMS | image | glance
Deleting an image | deleteImage | IMS | image | glance
Tagging an image | addTag | IMS | image | glance
Deleting an image tag | deleteTag | IMS | image | glance
Adding a tenant that can use a shared image | addMember | IMS | image | glance
Modifying information about a tenant that can use a shared image | updateMember | IMS | image | glance
Deleting a tenant from the group where the members can use a shared image | deleteMember | IMS | image | glance

Parent topic: Auditing Key Operations