a7000fd1ca
Rather use the term "samples" as having both is confusing. Note: this does *not* change the API, just the terminology in the code. bug 1104492 Signed-off-by: Angus Salkeld <asalkeld@redhat.com> Change-Id: If8cf89db60b52815db8e0acbf466400d0e9238c6
3.1 KiB
Glossary
- agent
-
Software service running on the OpenStack infrastructure measuring usage and sending the results to the
collector. - API server
-
HTTP REST API service for ceilometer.
- ceilometer
-
From WikiPedia1:
A ceilometer is a device that uses a laser or other light source to determine the height of a cloud base.
- central agent
-
Software service running on a central management node within the OpenStack infrastructure measuring usage and sending the results to the
collector. - collector
-
Software service running on the OpenStack infrastructure monitoring notifications from other OpenStack components and samples from the ceilometer agent and recording the results in the database.
- compute agent
-
Software service running on a compute node within the OpenStack infrastructure measuring usage and sending the results to the
collector. - data store
-
Storage system for recording data collected by ceilometer.
- meter
-
The measurements tracked for a resource. For example, an instance has a number of meters, such as duration of instance, CPU time used, number of disk io requests, etc. Three types of meters are defined in ceilometer: * Cumulative: Increasing over time (e.g. disk I/O) * Gauge: Discrete items (e.g. floating IPs, image uploads) and fluctuating values (e.g. number of Swift objects) * Delta: Incremental change to a counter over time (e.g. bandwidth delta)
- non-repudiable
-
From WikiPedia2:
Non-repudiation refers to a state of affairs where the purported maker of a statement will not be able to successfully challenge the validity of the statement or contract. The term is often seen in a legal setting wherein the authenticity of a signature is being challenged. In such an instance, the authenticity is being "repudiated".
- project
-
The OpenStack tenant or project.
- resource
-
The OpenStack entity being metered (e.g. instance, volume, image, etc.).
- sample
-
Data sample for a particular meter.
- source
-
The origin of metering data. This field is set to "openstack" by default. It can be configured to a different value using the counter_source field in the ceilometer.conf file.
- user
-
An OpenStack user.