openstack/ceilometer
Code Issues Proposed changes
68e5bab1f5
ceilometer/install-guide/source/get_started.rst
gord chung 8342ff8968 drop api and storage references from install-guide 
stop telling people how to use deprecated/unmaintained stuff
- remove all db docs detailing mongo install/config
- cleanup get_started.rst
  - remove note about future agents because i don't know what magic
    it's hinting at.
  - add note that collector is optional
- drop all notes about api service and notes about storage
- drop all stuff about configuring api with apache
- replace ceilometer+mongo config notes with ceilometer+gnocchi.
- remove keystone_authtoken config since no more api
- point all distro docs to gnocchi
- add a note to say api+storage is dead.

Change-Id: I494b4e7013ca146ffa640a356cacc4a1a5ee85e8
2017-01-27 16:49:20 +00:00

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Telemetry Data Collection service overview

The Telemetry Data Collection services provide the following functions:

  • Efficiently polls metering data related to OpenStack services.
  • Collects event and metering data by monitoring notifications sent from services.
  • Publishes collected data to various targets including data stores and message queues.

The Telemetry service consists of the following components:

A compute agent (ceilometer-agent-compute)

Runs on each compute node and polls for resource utilization statistics.

A central agent (ceilometer-agent-central)

Runs on a central management server to poll for resource utilization statistics for resources not tied to instances or compute nodes. Multiple agents can be started to scale service horizontally.

A notification agent (ceilometer-agent-notification)

Runs on a central management server(s) and consumes messages from the message queue(s) to build event and metering data.

A collector (ceilometer-collector)

Runs on central management server(s) and dispatches collected telemetry data to a data store or external consumer without modification. This service is optional as the ceilometer-agent-notification service can be configured to provide the equivalent functionality.

These services communicate by using the OpenStack messaging bus. Ceilometer data is designed to be published to various endpoints for storage and analysis.

Note

Ceilometer previously provided a storage and API solution. As of Newton, this functionality is officially deprecated and discouraged. For efficient storage and statistical analysis of Ceilometer data, Gnocchi is recommended.