[Hawkular-dev] Hawkular Metrics 0.3.4 - Release & Beyond

[John Sanda]

 I do think it makes sense to move it into the hawkular commons repo. I can plan on do doing that soon.

> On May 31, 2015, at 9:02 AM, Gary Brown <gbrown at redhat.com> wrote:
> 
> Congratulations on the release.
> 
> Is the task queue mechanism going to be moved into Hawkular Commons repo, so it can be reused by other hawkular components?
> 
> Regards
> Gary
> 
> ----- Original Message -----
>> Hello Everybody,
>> 
>> I am happy to announce release 0.3.4 of Hawkular Metrics. The release is
>> anchored by stability improvements and Docker + Kubernetes work.
>> 
>> Here are the release highlights:
>> 
>> 1) InfluxDB Compatibility Layer
>> - pretty printing of query results with the 'pretty' query parameter
>> - absolute moment operands in queries (ex: select * from test where time >
>> 1501560s and time < 4560546h)
>> - various fixes which allow to integrate nicely with Grafana (declaring
>> Hawkular Metrics as an InfluxDB 0.8 datasource)
>> 
>> 2) RxJavaMigration
>> - big refactoring to use RxJava instead of Guava's ListenableFuture
>> - RxJava provides a much richer API for building asynchronous programs
>> 
>> 3) Server Start-up
>> - the server no longer requires Cassandra to be started first
>> - any client requests will get back a 503 response code if the server has
>> not fully initialized due to Cassandra being down at start up time
>> 
>> 4) Docker and Kubernetes
>> - all project docker images are now available in Docker Hub! Get them here:
>>    https://registry.hub.docker.com/u/hawkular/hawkular-metrics/
>>    https://registry.hub.docker.com/u/hawkular/hawkular-cassandra/
>> - improved replication controller support now means that both the
>> Hawkular-Metrics and Cassandra images can be scaled up or down
>> - various other smaller improvements, including better support for when
>> containers startup
>> 
>> 5) REST API (IMPORTANT!)
>> - tenantId header was renamed to Hawkular-Tenant
>> - tenantId header fallback was removed
>> - GET {id}/tags only returns the tags, not the whole definition anymore
>> - GET {id} returns the metric definition (see HWKMETRICS-110 [1] for known
>> issue)
>> 
>> 6) UI Explorer
>> - was removed from the project
>> - discussions are underway to find a new home for the functionality and code
>> (probably hawkular-ui-components)
>> - npm is no longer required to compile the project
>> 
>> 7) Task Queue
>> - a generic task queue was designed and developed as part of this release
>> - provides functionality for scheduling and executing background tasks or
>> jobs
>> - task execution is
>>    scalable - automatically distributed among Hawkular Metrics servers
>>    durable - Tasks are persisted
>>    fault tolerant - Tasks are rescheduled for future execution when there is
>>    a failure
>> - it will serve as the foundation for
>>    computing/storing aggregated metrics (i.e., rollups)
>>    deleting metrics
>>    changing data retention
>> - this functionality will be basis for any background task based design for
>> the project
>> 
>> 
>> Github Release:
>> https://github.com/hawkular/hawkular-metrics/releases/tag/0.3.4
>> 
>> JBoss Nexus Maven artifacts:
>> http://origin-repository.jboss.org/nexus/content/repositories/public/org/hawkular/metrics/
>> 
>> Jira release tracker:
>> https://issues.jboss.org/browse/HWKMETRICS/fixforversion/12327259/
>> 
>> 
>> Hawkular Metrics 0.3.5 and Beyond
>> 1) Gauge Aggregates - Long-term storage of numeric metrics at the expense of
>> losing some fidelity. With task queue released in 0.3.4, the expectation is
>> to start the actual implementation 0.3.5.
>> 2) Update REST testing - while the current set of tests is a good gauge for
>> regressions, the overall coverage is still low. The plan for 0.3.5 is to
>> increase coverage.
>> 3) Improved Docker and Kubernetes support - this is a long term goal for the
>> project
>> 4) RXJava - the initial transition from Guava was done in 0.3.4. Future
>> releases will build upon this foundation.
>> 
>> 
>> A big "Thank  you" goes to John Sanda, Thomas Segismont, Mike Thompson, Matt
>> Wringe, Michael Burman, and Heiko Rupp for their project contributions.
>> Special mentions go to Jeeva Kandasamy and Jirka  Kremser for their project
>> help.
>> 
>> 
>> [1] https://issues.jboss.org/browse/HWKMETRICS-110
>> 
>> Thank you,
>> Stefan Negrea
>> 
>> Software Engineer
>> 
>> _______________________________________________
>> hawkular-dev mailing list
>> hawkular-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/hawkular-dev
>> 
> _______________________________________________
> hawkular-dev mailing list
> hawkular-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/hawkular-dev