Telemetry Module

The telemetry module sends anonymous data about the cluster back to the Ceph developers to help understand how Ceph is used and what problems users may be experiencing.

This data is visualized on public dashboards that allow the community to quickly see summary statistics on how many clusters are reporting, their total capacity and OSD count, and version distribution trends.

Channels

The telemetry report is broken down into several “channels”, each with a different type of information. Assuming telemetry has been enabled, individual channels can be turned on and off. (If telemetry is off, the per-channel setting has no effect.)

  • basic (default: on): Basic information about the cluster

    • capacity of the cluster

    • number of monitors, managers, OSDs, MDSs, object gateways, or other daemons

    • software version currently being used

    • number and types of RADOS pools and CephFS file systems

    • names of configuration options that have been changed from their default (but not their values)

  • crash (default: on): Information about daemon crashes, including

    • type of daemon

    • version of the daemon

    • operating system (OS distribution, kernel version)

    • stack trace identifying where in the Ceph code the crash occurred

  • device (default: on): Information about device metrics, including

    • anonymized SMART metrics

  • ident (default: off): User-provided identifying information about the cluster

    • cluster description

    • contact email address

The data being reported does not contain any sensitive data like pool names, object names, object contents, hostnames, or device serial numbers.

It contains counters and statistics on how the cluster has been deployed, the version of Ceph, the distribution of the hosts and other parameters which help the project to gain a better understanding of the way Ceph is used.

Data is sent secured to https://telemetry.ceph.com.

Sample report

You can look at what data is reported at any time with the command:

  1. ceph telemetry show

To protect your privacy, device reports are generated separately, and data such as hostname and device serial number is anonymized. The device telemetry is sent to a different endpoint and does not associate the device data with a particular cluster. To see a preview of the device report use the command:

  1. ceph telemetry show-device

Please note: In order to generate the device report we use Smartmontools version 7.0 and up, which supports JSON output. If you have any concerns about privacy with regard to the information included in this report, please contact the Ceph developers.

Channels

Individual channels can be enabled or disabled with:

  1. ceph config set mgr mgr/telemetry/channel_ident false
  2. ceph config set mgr mgr/telemetry/channel_basic false
  3. ceph config set mgr mgr/telemetry/channel_crash false
  4. ceph config set mgr mgr/telemetry/channel_device false
  5. ceph telemetry show
  6. ceph telemetry show-device

Enabling Telemetry

To allow the telemetry module to start sharing data:

  1. ceph telemetry on

Please note: Telemetry data is licensed under the Community Data License Agreement - Sharing - Version 1.0 (https://cdla.io/sharing-1-0/). Hence, telemetry module can be enabled only after you add ‘–license sharing-1-0’ to the ‘ceph telemetry on’ command.

Telemetry can be disabled at any time with:

  1. ceph telemetry off

Interval

The module compiles and sends a new report every 24 hours by default. You can adjust this interval with:

  1. ceph config set mgr mgr/telemetry/interval 72    # report every three days

Status

The see the current configuration:

  1. ceph telemetry status

Manually sending telemetry

To ad hoc send telemetry data:

  1. ceph telemetry send

In case telemetry is not enabled (with ‘ceph telemetry on’), you need to add ‘–license sharing-1-0’ to ‘ceph telemetry send’ command.

Sending telemetry through a proxy

If the cluster cannot directly connect to the configured telemetry endpoint (default telemetry.ceph.com), you can configure a HTTP/HTTPS proxy server with:

  1. ceph config set mgr mgr/telemetry/proxy https://10.0.0.1:8080

You can also include a user:pass if needed:

  1. ceph config set mgr mgr/telemetry/proxy https://ceph:telemetry@10.0.0.1:8080

Contact and Description

A contact and description can be added to the report. This is completely optional, and disabled by default.:

  1. ceph config set mgr mgr/telemetry/contact 'John Doe <john.doe@example.com>'
  2. ceph config set mgr mgr/telemetry/description 'My first Ceph cluster'
  3. ceph config set mgr mgr/telemetry/channel_ident true