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fuel-plugin-lma-collector/doc/user/source/release_notes.rst

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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 the logs and notifications is separated from the processing of the metrics in two different hekad instances. This allows for better performance and control of the flow 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, we can avoid losing logs (and notifications) when the Elasticsearch server is inaccessible for a long period of time. As a result, the StackLight collector has now two processes running on the node:

      • One for the log_collector service
      • One for the metric_collector service

    • Metrics derived from logs are aggregated by the log_collector service.

      To avoid flooding the metric_collector with bursts of metrics derived from logs, the log_collector service sends 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 LMA toolchain. Please check the Diagnostic Tool section of the User Guide for more information.

  • Bug fixes

Version 0.9.0

  • Changes
    • Upgrade to Heka 0.10.0.
    • Collect libvirt metrics on compute nodes.
    • Detect spikes of errors in the OpenStack services logs.
    • Report OpenStack workers status per node.
    • Support multi-environment deployments.
    • Add support for Sahara logs and notifications.
  • Bug fixes
    • Reconnect to the local RabbitMQ instance if the connection has been lost (#1503251).
    • Enable buffering for Elasticsearch, InfluxDB, Nagios and TCP outputs to reduce congestion in the Heka pipeline (#1488717, #1557388).
    • Return the correct status for Nova when Midonet is used (#1531541).
    • Return the correct status for Neutron when Contrail is used (#1546017).
    • Increase the maximum number of file descriptors (#1543289).
    • Avoid spawning several hekad processes (#1561109).
    • Remove the monitoring of individual queues of RabbitMQ (#1549721).
    • Rotate hekad logs every 30 minutes if necessary (#1561603).

Version 0.8.0

  • Support for alerting in two different modes:
    • Email notifications.
    • Integration with Nagios.
  • Upgrade to InfluxDB 0.9.5.
  • Upgrade to Grafana 2.5.
  • Management of the LMA collector service by Pacemaker on the controller nodes for improved reliability.
  • Monitoring of the LMA toolchain components (self-monitoring).
  • Support for configurable alarm rules in the Collector.

Version 0.7.0

  • Initial release of the plugin. This is a beta version.