[Hawkular-dev] Hawkular Metrics 0.22.0 - Release

[Stefan Negrea]

Hello,

I am happy to announce release 0.22.0 of Hawkular Metrics. This release is
anchored by performance and compression enhancements.

Here is a list of major changes:

   - *Compression*
      - Prevent OutOfMemoryError on Cassandra when compression job runs (
      HWKMETRICS-520 <https://issues.jboss.org/browse/HWKMETRICS-520>)
      - Avoid compression job executing in a loop when execution falls
      behind (HWKMETRICS-536
      <https://issues.jboss.org/browse/HWKMETRICS-536>)
      - Avoid future executions of compression job from not running if
      Cassandra is shutdown abruptly (HWKMETRICS-518
      <https://issues.jboss.org/browse/HWKMETRICS-518>)
      - Added a flag to disable the compression job; the data will be
      persisted and retrieved without compression (HWKMETRICS-524
      <https://issues.jboss.org/browse/HWKMETRICS-524>)
      - The block size for compression is now configurable (HWKMETRICS-545
      <https://issues.jboss.org/browse/HWKMETRICS-545>)
      - The compression job can now be triggered manually (HWKMETRICS-502
      <https://issues.jboss.org/browse/HWKMETRICS-502>)
   - *Server Clustering*
      - The external alerter is now cluster-aware and will not process the
      same request on multiple nodes (HWKMETRICS-515
      <https://issues.jboss.org/browse/HWKMETRICS-515>)
      - Schema updates are correctly applied when multiple servers are
      started at the same time (HWKMETRICS-514
      <https://issues.jboss.org/browse/HWKMETRICS-514>)
      - Added Cassandra connection information to the status page and
      created an admin version with detailed Cassandra cluster information (
      HWKMETRICS-526 <https://issues.jboss.org/browse/HWKMETRICS-526>)
      - Internal system metrics are now persisted under admin tenant; this
      gives a good overview of the current system load (HWKMETRICS-550
      <https://issues.jboss.org/browse/HWKMETRICS-550>)
   - *REST API*
      - Added endpoint to allow fetching of available tag names (
      HWKMETRICS-532 <https://issues.jboss.org/browse/HWKMETRICS-532>)
      - Fixed an issue where the API would report an internal server error
      on invalid query (HWKMETRICS-543
      <https://issues.jboss.org/browse/HWKMETRICS-543>)
   - *Hawkular Alerting - Updates*
      - End to end performance enhancements
      - Major improvements to REST API documentation
      <http://www.hawkular.org/docs/rest/rest-alerts.html>
      - New cross-tenant endpoints for for fetching alerts
      - Email and webhook action plugins are now packaged in the main
      distribution (HWKMETRICS-552
      <https://issues.jboss.org/browse/HWKMETRICS-552>)

*Hawkular Alerting - included*

   - Version 1.4.0
   <https://issues.jboss.org/projects/HWKALERTS/versions/12331986>
   - Project details and repository: Github
   <https://github.com/hawkular/hawkular-alerts>
   - Documentation: REST API Documentation
   <http://www.hawkular.org/docs/rest/rest-alerts.html>, Examples
   <https://github.com/hawkular/hawkular-alerts/tree/master/examples>,
Developer
   Guide
   <http://www.hawkular.org/community/docs/developer-guide/alerts.html>

*Hawkular Metrics Clients*

   - Python: https://github.com/hawkular/hawkular-client-python
   - Go: https://github.com/hawkular/hawkular-client-go
   - Ruby: https://github.com/hawkular/hawkular-client-ruby
   - Java: https://github.com/hawkular/hawkular-client-java


*Release Links*

Github Release:
https://github.com/hawkular/hawkular-metrics/releases/tag/0.22.0

JBoss Nexus Maven artifacts:
http://origin-repository.jboss.org/nexus/content/repositorie
s/public/org/hawkular/metrics/

Jira release tracker:
https://issues.jboss.org/projects/HWKMETRICS/versions/12332012

A big "Thank you" goes to John Sanda, Matt Wringe, Michael Burman, Joel
Takvorian, Jay Shaughnessy, Lucas Ponce, and Heiko Rupp for their project
contributions.


Thank you,
Stefan Negrea
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