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Beth Dean
d35522aee4
updated telempostd description, kept at high level, will provide more detail in other documentation. Also changed |CL| to |CL-ATTR| for first instance.
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3.1 KiB
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85 lines
3.1 KiB
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.. _telemetry-about:
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Telemetrics
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###########
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One of the key features of |CL-ATTR| is telemetry, which is used to
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monitor system health. Telemetry enables developers to observe and proactively
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address issues before end users are impacted.
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*Telemetrics* is a combination word made from:
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* *Telemetry* which is sensing and reporting data.
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* *Analytics* which is using visualization and statistical inferencing to make
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sense of the reported data.
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|CL| telemetry reports system-level debug/crash information using specialized probes. The
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probes monitor system tasks such as :abbr:`swupd (software updater)`, kernel
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oops, machine error checks, and BIOS error report table for unhandled hardware
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failures. Telemetry enables real-time issue reporting to allow system
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developers to quickly focus on an issue and monitor corrective actions.
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|CL| telemetry is fully customizable and can be used during software development
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for debugging purposes. You can use **libtelemetry** in your code to create custom
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telemetry records. You can also use **telem-record-gen** in script files or call
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it from another program.
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Architecture
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************
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|CL| telemetry has two fundamental components, which are shown in figure 1:
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* Client: generates and delivers records to the backend server via the network.
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* Backend: captures records sent from the client and displays the cumulative
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content through a specialized interface.
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.. note::
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If you want to capture your own records for analysis, you must set up
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your own backend server.
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.. figure:: figures/telemetry-about-1.png
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:scale: 75%
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:alt: Clear Linux Telemetry Architecture.
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Figure 1: Clear Linux Telemetry Architecture.
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The telemetry client provides the front end of a complete telemetrics solution
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and includes the following components:
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* **telemprobd**, a daemon that prepares the telemetry records and spools them on disk prior to delivery
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* **telempostd**, a daemon that sends the records to the telemetry backend server or leaves them on disk until deleting after the record expires.
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* **probes**, that collect specific types of data from the operating system.
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* **libtelemetry**, that telemetrics probes use to create telemetrics records and
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send them to the telemprobd daemon for further processing.
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The telemetry backend provides the server-side component of a complete telemetrics solution and
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consists of:
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* Nginx web server.
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* Two Flask apps:
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* Collector, an ingestion web app for records received from telemetrics-client probes.
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* TelemetryUI, a web app that exposes several views to visualize the telemetry data
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and also provides a REST API to perform queries.
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* PostgreSQL as the underlying database server.
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The default telemetry backend server reports back to the |CL| development team
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and is not viewable outside the Intel firewall. If you want to collect your
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own records, then you must set up your own telemetry backend server.
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Next steps
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**********
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To put this concept into practice, see the following resources:
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* :ref:`telemetry-enable`
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* :ref:`telemetry-backend`
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* `Telemetry feature description`_
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.. _`Telemetry feature description`:
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https://clearlinux.org/features/telemetry
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