RHQ 4 released

The RHQ project[1] is happy to release version 4 of our open source server monitoring and management framework.
RHQ provides the ability to monitor and manage PostgreSQL servers and has been showcased at PGDay.EU in Stuttgart last december.

After ten months of hard work, RHQ 4 has been released on April 29, 2011. The most prominent change to previous versions is a huge rewrite of most parts of the UI into GWT (Google Web Toolkit).
Other notable changes include:
• support for Postgres 9.0 as a backend database
• support for deleting agent plugins
• support for executing an RHQ CLI script when an alert fires (for more info, see this blog[2])
• improved authorization for content repositories - public/private repos, repo owners, and MANAGE_REPOSITORIES privileges
• Much improved MySQL agent plug-in (by Steve Milidge)
• New logfile alert-sender (by Steve Milidge)

To see the full list of changes, browse the release notes [3], which also contain a link to the download [4].

RHQ is written in Java and provides a general framework for monitoring, alerting, central tracking of configuration, executing operations on managed resources, and performing other management tasks. RHQ is designed in a way that allows administrators to adapt RHQ to their specific IT environment by adding plug-ins or content that can be used to manage resources. Some of these features include:
• The actual functionality to talk to managed resources is provided by plug-ins and can thus be extended to whatever resources or frameworks are out there. RHQ provides a series of default resource plug-ins that covers a variety of common resources, includingM Windows, Linux, JBossAS, Apache httpd and Tomcat, MySQL, and Postgres.
• Sending alert notifications is governed by plug-ins, so that it is easy, for example, to integrate RHQ with company-wide ticketing systems. Alert sender plug-ins for email and for logfiles are provided by default, as well as a sender that can run arbitrary scripts in the RHQ command-line language.
• RHQ also offers the possibility to roll out software ("bundles") to groups of managed servers.
• To store metric data, configurations, bundles, and other data, RHQ uses either Oracle or Postgres as its backend database.Administrators can access RHQ via a GWT-based UI or a command-line client.

To see the full list of changes, browse the release notes [3], which also contain a link to the download [4].

[1]: http://rhq-project.org
[2]: link to blog
[3]: http://rhq-project.org/display/RHQ/Release+Notes+4.0.0
[4]: http://sourceforge.net/projects/rhq/files/rhq/rhq-4.0.0/

Heiko (on behalf of the RHQ team)

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