Possible to output fluentd system logs in JSON format?

[jmo...@zendesk.com]

I was looking through the docs about the logs that fluentd itself generates: https://docs.fluentd.org/v0.12/articles/logging

When I look at the logs it's generating, I see lines like this:

2017-12-19 20:21:29 +0000 [warn]: buffer flush took longer time than slow_flush_log_threshold: plugin_id="object:3fcf14b0f6f8" elapsed_time=38.915493082 slow_flush_log_threshold=20.0

Is it possible to configure fluentd to output its own logs in JSON format?

I'm forwarding all the logs to a EFK stack, and it would be great if those values like elapsed_time and slow_flush_log_threshold were something I could easily index and search on.

In theory I could try to reverse-engineer regexs to parse those logs and extract the values, but it would be a lot easier to just get those logs in a structured way.

Thanks,

Jon

[Mr. Fiber]

Capturing fluentd logs with <match fluent.**> is one approach: https://docs.fluentd.org/v0.12/articles/logging#capture-fluentd-logs

You can process fluentd logs by plugins.

In v1.0, you can use <log> directive in <system> to change log format: https://github.com/fluent/fluentd/pull/1644

I forgot to add this parameter to logging article. I will do it.

Thanks,

Masahiro 

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[Jon Moter]

Perfect, thank you!

Any word when the fluentd daemonset will support v1.0, so I can run that in my Kubernetes clusters?