Apache Karaf Decanter 2.3.0, the new alerting service
Apache Karaf Decanter 2.3.0 will be released soon. This release brings lot of fixes, improvements and new features. In this blog post, we will focus on one major refactoring done in this version: the alerting service. Goodbye checker, welcome alerting service Before Karaf Decanter 2.3.0, the alert rules where defined in a configuration file named etc/org.apache.karaf.decanter.alerting.checker.cfg . The configuration were simple and looked like. For instance: message.warn=match:.*foobar.* But the checker has three limitations: it’s not possible to define a check on several attributes at same time. For instance, it’s not possible to have a rule with something like if message == 'foo' and other == 'bar' . it’s not possible to have “time scoped” rule. For instance, I want to have an alert only if a counter is great than a value for x minutes. A bit related to previous point, the recoverable alerts are not perfect in the checker. It should be a configuration of the alert rul