Experimental Quarkiverse Logback Support

[Stuart Douglas]

Hi Everyone,

I have just done a 0.1.0 release of quarkus-logging-logback: https://github.com/quarkiverse/quarkus-logging-logback

This is a bridge between jboss-logging and logback, that allows you to use logback.xml to configure logging, and more importantly use logback appenders in your Quarkus application. This makes it possible to integrate Quarkus applications with 3rd party monitoring solutions that provide logback appenders.

Note that this does not replace jboss-logmanager and the core Quarkus logging system, instead logging events are passed from jboss-logging into the logmanager appender layer (so jboss-logging basically treats logback as an additional appender). Other non-appender configuration such as log levels is supported by translating the configuration into the equivalent quarkus config properties. Because this is not using logback as the actual logging engine we cannot guarantee 'bug for bug' compatibility, however for the main use case (integrating with other products) this should not be an issue.

logback.xml is parsed at build time, so the overhead is minimised as much as possible. Even so we recommend that you only use this if you have a specific need for an appender that is not provided by jboss-logmanager, as including two different logging systems will always add overhead.

This requires the upcoming 2.1.0.Final release, as it requires some capabilities that were not in 2.0.0.Final.

Stuart

[Stephane Epardaud]

Great news!

Since this is the first quarkiverse extension I look at, where do I go to view its docs, if not from its source code?

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Stéphane Épardaud

[George Gastaldi]

Here: https://quarkiverse.github.io/quarkiverse-docs/

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[Erin Schnabel]

could/should be linked from the repo as its website (I did that for micrometer, but not all have or do.. )

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[Stephane Epardaud]

Thanks. I don't see from the docs how I can configure Logback, is there support in quarkus config, or an external file, or am I missing something obvious to existing Logback users?

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Stéphane Épardaud

[Stuart Douglas]

You add logback.xml, it's literally the first line of the docs :-)

If you don't really know about logback.xml then you should just be using normal quarkus logging I think. You should only use this if you really need something from logback, and in that case you should know how to configure it.

Stuart

[Stephane Epardaud]

It is indeed the first line, and I didn't even notice it because there are no examples of such a minimal file, nor any links to docs of it and not even links to Logback. So, IMO this looks very much like the docs someone would write if they wanted to get rid of a problematic use-case while encouraging people not to go down that way ;)

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Stéphane Épardaud

[Sérgio Sousa]

Hi!

Since I'm in the process of upgrading to 2.1.x, and I had a "dirty" hack to use logback (I need to use SiftingAppender to generate file logs per threads / processes), I thought to give this extension a go. The problem I have is that my files using the ch.qos.logback.classic.sift.SiftingAppender are not created / generated.

I tested the simple example in my logback.xml with ch.qos.logback.core.FileAppender and it works just fine. My question is: Am I missing something in configurations or others? Does ch.qos.logback.classic.sift.SiftingAppender supported?

Thanks in advance!

Best regards,

Sérgio Sousa

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[Stuart Douglas]

Do you have a reproducer I can test?

Stuart

[Sérgio Sousa]

Yes, here it is: https://github.com/seseso/quarkus-logback-siftingappender

hitting a curl to the default resource (http://localhost:8080/hello) triggers some logs.

As is, the test.log file is created but neither of the sifting_XXX.log (nor original one sifting.log for that matter) are created.

If you need anything else, please let me know.

Best regards,

Sérgio Sousa

[Stuart Douglas]

Try with 0.3.0 and it should work (might take a while to hit central though, I only just hit the button). I also upped the version to 2.1.1.Final.

Stuart

[Sérgio Sousa]

It worked!

Thanks!

Sérgio Sousa