[SOLVED] How do I enrich my event stream with an environment variable in fluentd?

How do I enrich my event stream with an environment variable in fluentd?

I have a source event stream which is coming from a log tail. I'm trying to enrich this by using the filter directive. Some searching mentioned using #{ENV['MYVAR']} would work but I am getting an empty string as the value. The filter is as below:

<filter logtag.mytag>
  @type record_transformer
  enable_ruby
  <record>
    mykey "#{ENV['MYVAR']}"
  </record>
</filter>

Is it possible to add an env variable the way I'm doing it, and if so what am I doing incorrectly? Any help is appreciated.

Solution

Along with what Imran mentioned (set enable_ruby to true), the mistake was that I was using a mac environment and it turns out we have to set the environment variable through launchctl to make it work instead of exporting it in bash profile or /etc/environment like we do in linux.

Command:

sudo launchctl setenv MYVAR varvalue

After doing that, it worked right away.