Notice

This document is for a development version of Ceph.

Telemetry Module

The telemetry module sends anonymous data about the cluster back to the Ceph developers to report how Ceph is used and to report problems experienced by users.

This data is visualized on public dashboards that allow the community to see a summary of statistics including 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. If 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

  • perf (default: off): Various performance metrics of a cluster, which can be used to

    • reveal overall cluster health

    • identify workload patterns

    • troubleshoot issues with latency, throttling, memory management, etc.

    • monitor cluster performance by daemon

The reported data does not contain any sensitive data. This means that the reported data does not include pool names, object names, object contents, hostnames, or device serial numbers.

The reported data contains counters and statistics pertaining to how the cluster has been deployed, the version of Ceph, the distribution of the hosts, and other parameters that help the project develop a better understanding of the way Ceph is used.

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

Individual channels can be enabled or disabled by running the following commands:

ceph telemetry enable channel basic
ceph telemetry enable channel crash
ceph telemetry enable channel device
ceph telemetry enable channel ident
ceph telemetry enable channel perf

ceph telemetry disable channel basic
ceph telemetry disable channel crash
ceph telemetry disable channel device
ceph telemetry disable channel ident
ceph telemetry disable channel perf

Multiple channels can be enabled or disabled at the same time by running the following commands:

ceph telemetry enable channel basic crash device ident perf
ceph telemetry disable channel basic crash device ident perf

All channels can be enabled or disabled at once by running the following commands:

ceph telemetry enable channel all
ceph telemetry disable channel all

Note that telemetry must be on for these commands to take effect.

List all channels with:

ceph telemetry channel ls

NAME      ENABLED    DEFAULT    DESC
basic     ON         ON         Share basic cluster information (size, version)
crash     ON         ON         Share metadata about Ceph daemon crashes (version, stack straces, etc)
device    ON         ON         Share device health metrics (e.g., SMART data, minus potentially identifying info like serial numbers)
ident     OFF        OFF        Share a user-provided description and/or contact email for the cluster
perf      ON         OFF        Share various performance metrics of a cluster

Enabling Telemetry

To allow the telemetry module to share data, run the following command:

ceph telemetry on

Please note: Telemetry data is licensed under the Community Data License Agreement - Sharing - Version 1.0. This means that telemetry module can be enabled only after you add --license sharing-1-0 to the ceph telemetry on command. After telemetry is on, consider enabling channels which are off by default, such as the perf channel. ceph telemetry on output will list the exact command to enable these channels.

Telemetry can be disabled at any time by running the following command:

ceph telemetry off

Sample report

Show reported data by running the following command:

ceph telemetry show

If telemetry is disabled, run the following command to preview a sample report:

ceph telemetry preview

The generation of a sample report for larger clusters might take some time.

To protect sensitive information, device reports are generated separately. Data including hostnames and device serial numbers are 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, run the following command:

ceph telemetry show-device

If telemetry is disabled, run the following command to preview a sample device report:

ceph telemetry preview-device

Note

smartmontools version 7.0 or later must be installed so that JSON output can be specified and parsed. If you have any concerns about privacy with regard to the information included in this report, contact the Ceph developers.

When telemetry is enabled, run the following command to generate both reports in a single output:

ceph telemetry show-all

When telemetry is disabled, run the following command to view both reports in a single output:

ceph telemetry preview-all

Sample report by channel

Run the following command when telemetry is enabled to show the data reported by a specified channel:

ceph telemetry show <channel_name>

Please note: If telemetry is on, and <channel_name> is disabled, the command above will output a sample report by that channel, according to the collections the user is enrolled to. However this data is not reported, since the channel is disabled.

If telemetry is off you can preview a sample report by channel with:

ceph telemetry preview <channel_name>

Collections

Collections represent different aspects of data collected within a channel.

To list all collections, run the following command:

ceph telemetry collection ls

NAME                            STATUS                                               DESC
basic_base                      NOT REPORTING: NOT OPTED-IN                          Basic information about the cluster (capacity, number and type of daemons, version, etc.)
basic_mds_metadata              NOT REPORTING: NOT OPTED-IN                          MDS metadata
basic_pool_flags                NOT REPORTING: NOT OPTED-IN                          Per-pool flags
basic_pool_options_bluestore    NOT REPORTING: NOT OPTED-IN                          Per-pool bluestore config options
basic_pool_usage                NOT REPORTING: NOT OPTED-IN                          Default pool application and usage statistics
basic_rook_v01                  NOT REPORTING: NOT OPTED-IN                          Basic Rook deployment data
basic_stretch_cluster           NOT REPORTING: NOT OPTED-IN                          Stretch Mode information for stretch clusters deployments
basic_usage_by_class            NOT REPORTING: NOT OPTED-IN                          Default device class usage statistics
crash_base                      NOT REPORTING: NOT OPTED-IN                          Information about daemon crashes (daemon type and version, backtrace, etc.)
device_base                     NOT REPORTING: NOT OPTED-IN                          Information about device health metrics
ident_base                      NOT REPORTING: NOT OPTED-IN, CHANNEL ident IS OFF    User-provided identifying information about the cluster
perf_memory_metrics             NOT REPORTING: NOT OPTED-IN, CHANNEL perf IS OFF     Heap stats and mempools for mon and mds
perf_perf                       NOT REPORTING: NOT OPTED-IN, CHANNEL perf IS OFF     Information about performance counters of the cluster

Where:

NAME

Collection name. The prefix indicates the channel to which the collection belongs.

STATUS

Indicates whether the collection metrics are reported. This is determined by the status (enabled or disabled) to which the channel of the collection belongs, along with the enrollment status of the collection (whether the user is opted-in to this collection).

DESC

General description of the collection.

To display any difference between the currenty-enrolled collections and any new or available collections, run the following command:

ceph telemetry diff

To enroll to the most recent collections, run the following command:

ceph telemetry on

Enable a new channel that is currently disabled by running a command of the following form:

ceph telemetry enable channel <channel_name>

Interval

The telemetry module compiles and sends a new report every 24 hours by default. Adjust this interval by running a command of the following form:

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

Status

To print the current configuration of the telemetry module, run a command of the following form:

ceph telemetry status

Manually sending telemetry

To send an ansynchronous, one-time set of telemetry data, run the following command:

ceph telemetry send

If telemetry has not been enabled (by running the command ceph telemetry on), add --license sharing-1-0 to the ceph telemetry send command.

Sending telemetry through a proxy

If the cluster cannot directly connect to the configured telemetry endpoint (default: telemetry.ceph.com), configure an HTTP/HTTPS proxy server by running a command of the following form:

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

Include a colon-separated user and password (user:pass) if needed by running a command of the following form:

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 optional and is disabled by default. Run commands of the following forms to add contacts and descriptions:

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

Leaderboard

To participate in a leaderboard in the public dashboards, run the following command:

ceph config set mgr mgr/telemetry/leaderboard true

The leaderboard displays basic information about the cluster. This includes the cluster’s total storage capacity and the number of OSDs. To add a description of the cluster so that it can more easily be identified on the leaderboard, run a command of the following form:

ceph config set mgr mgr/telemetry/leaderboard_description 'Ceph cluster for Computational Biology at the University of XYZ'

If the ident channel is enabled, its details will not be displayed in the leaderboard.

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