A Google Cloud Platform (GCP) Persistent Disk volume provides block storage for a GCP Compute Engine virtual machine (VM) instance.

You must configure cloud connections to monitor this entity. See Configure Google Cloud Platform Connection.

Cisco Cloud Observability displays GCP entities on the Observe page. Metrics are displayed for specific entity instances in the list and detail views.

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Detail View 

To display the detail view of a GCP Persistent Disk volume:

  1. Navigate to the Observe page.
  2. Under Database & Storage, click a Storage group.
  3. The Storage list view now displays. Click the GCP tab to display only GCP storage entities.
  4. Click a volume Name to display the detail view for the selected instance.
    The detail view displays metrics, key performance indicators, and properties (attributes) related to the instance you selected.

Metrics and Key Performance Indicators 

Cisco Cloud Observability displays the following metrics and key performance indicators (KPIs) for Persistent Disk volumes. See Google Cloud metrics.

GCP does not provide metrics for Persistent Disks shared between multiple Compute Engine Instance VMs.

Display NameSource MetricDescription

Disk I/O Bytes (By)

instance/disk/read_bytes_count

  • Count of bytes read from disk.
  • Sampled every 60 seconds.
  • After sampling, data is not visible for up to 240 seconds.
  • Linux only.
instance/disk/write_bytes_count
  • Count of bytes written to disk.
  • Sampled every 60 seconds.
  • After sampling, data is not visible for up to 240 seconds.
  • Linux only.

Disk Operations (Count)

instance/disk/read_ops_count
  • Count of disk read IO operations.
  • Sampled every 60 seconds.
  • After sampling, data is not visible for up to 240 seconds.
  • Linux only.
instance/disk/write_ops_count
  • Count of disk write IO operations.
  • Sampled every 60 seconds.
  • After sampling, data is not visible for up to 240 seconds.
  • Linux only.

Properties (Attributes)

Cisco Cloud Observability displays the following properties for Persistent Disk volumes.

Display NameProperty NameDescription
Disk ID

cloud.disk.id

The unique disk ID.

Name

cloud.disk.name

The disk name.

Created At

cloud.disk.created_at

The date and time when the disk was created, in date-time format.

Last Attached At

gcp.disk.last_attached_at

The date and time when the disk was last attached, in date-time format.

Self Link

gcp.disk.self_link

The server-defined fully-qualified URL for this resource.

State

cloud.disk.state

The state of the disk.

Type

cloud.disk.type

The type of the disk.

Kind

gcp.disk.kind

The type of the resource. For disks, the value is always compute#disk.

Zone

cloud.availability_zone

Represents the zone where the resource is running.

Source Image

gcp.disk.source_image

The source image of the disk.

Size

cloud.disk.size

The size of the disk.

Retention and Purge Time-To-Live (TTL)

For all cloud and infrastructure entities, the retention TTL is 180 minutes (3 hours) and the purge TTL is 525,600 minutes (365 days). 

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