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fuel-plugin-lma-collector
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StackLight 0.10.0 documentation updates 

Fixed bullets indentation

Change-Id: Ibdda7597cf2188abad44b3b0761220bef5217d08
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Patrick Petit 2016-06-10 18:46:21 +02:00 committed by Simon Pasquier
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doc/user/source/releases.rst
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@ -6,6 +6,48 @@ Release Notes
Version 0.10.0
--------------
* Changes
* Separate processing pipeline for logs and metrics
Prior to StackLight version 0.10.0, there was one instance of the *hekad*
process running to process both the logs and the metrics. Starting with StackLight
version 0.10.0, the processing of logs and notifications is separated
from the processing of metrics into two different *hekad* instances.
This allows for better performance and flow control mechanisms when the
maximum buffer size on disk has reached a limit. With the *hekad* instance
processing the metrics, the buffering policy mandates to drop the metrics
when the maximum buffer size is reached. With the *hekad* instance
processing the logs, the buffering policy mandates to block the
entire processing pipeline. This way, one can avoid
losing logs (and notifications) in cases when the Elasticsearch
server has been inaccessible for a long period of time.
As a result, the StackLight collector has now two services running
on a node:
* The **log_collector** service
* The **metric_collector** service
* Metrics derived from logs are now aggregated
To avoid flooding the *metric_collector* with bursts of metrics derived
from logs, the *log_collector* service sends aggregated metrics
by bulk to the *metric_collector* service.
An example of aggregated metric derived from logs is the
`openstack_<service>_http_response_time_stats
<http://fuel-plugin-lma-collector.readthedocs.io/en/latest/appendix_b.html#api-response-times>`_.
* Diagnostic tool
A diagnostic tool is now available to help diagnose problems.
The diagnostic tool checks that the toolchain is properly installed
and configured across the entire StackLight LMA toolchain. Please check the
the `Troubleshooting Chapter
<http://fuel-plugin-lma-collector.readthedocs.io/en/latest/configuration.html#troubleshooting>`_
of the User Guide for more information.
* Bug fixes
Version 0.9.0
-------------