openstack/ceilometer
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Add notes on moving to Gnocchi

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Change-Id: I819b5cba3be9ce80895f5479059e3bcdf8a701bd
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gordon chung 2016-04-11 12:33:54 -04:00
parent 7fe87e904f
commit 8e7940ad44
2 changed files with 34 additions and 5 deletions
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31
doc/source/install/dbreco.rst
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@ -15,17 +15,18 @@
.. _choosing_db_backend: .. _choosing_db_backend:
===================================== ============================
Choosing a database backend - Legacy Choosing a database backend
===================================== ============================
.. note:: .. note::
Ceilometer's existing database capabilities is intended for post processing Ceilometer's native database capabilities is intended for post processing
and auditing purposes where responsiveness is not a requirement. It and auditing purposes where responsiveness is not a requirement. It
captures the full fidelity of each datapoint and thus is not designed captures the full fidelity of each datapoint and thus is not designed
for low latency use cases. For more responsive use cases, it's recommended for low latency use cases. For more responsive use cases, it's recommended
to store data in an alternative source such as Gnocchi_ to store data in an alternative source such as Gnocchi_. Please see
`Moving from Ceilometer to Gnocchi`_ to find more information.
.. note:: .. note::
@ -65,4 +66,24 @@ PostgreSQL Yes Yes Yes
HBase Yes Yes, except groupby Yes HBase Yes Yes, except groupby Yes
================== ============================= =================== ====== ================== ============================= =================== ======
Moving from Ceilometer to Gnocchi
=================================
Gnocchi represents a fundamental change in how data is represented and stored.
Installation and configuration can be found in :ref:`installing_manually`.
Differences between APIs can be found here_.
There currently exists no migration tool between the services. To transition
to Gnocchi, multiple dispatchers can be enabled in the Collector to capture
data in both the native Ceilometer database and Gnocchi. This will allow you
to test Gnocchi and transition to it fully when comfortable. The following
should be included in addition to the required configurations for each
backend::
[DEFAULT]
meter_dispatchers=database
meter_dispatchers=gnocchi
.. _Gnocchi: http://gnocchi.xyz .. _Gnocchi: http://gnocchi.xyz
.. _here: https://docs.google.com/presentation/d/1PefouoeMVd27p2OGDfNQpx18mY-Wk5l0P1Ke2Vt5LwA/edit?usp=sharing

8
doc/source/webapi/index.rst
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@ -2,6 +2,14 @@
Web API Web API
========= =========
.. note::
Gnocchi provides a more responsive API when statistical capabilities rather
than full-resolution datapoints are required. The REST API for Gnocchi is
captured here_.
.. _here: http://docs.openstack.org/developer/gnocchi/rest.html
.. toctree:: .. toctree::
:maxdepth: 2 :maxdepth: 2