Using environment variables

[goncalobsantos]

I am trying to execute a conf file and get the following error:
Connecion refused - failed to open TCP connection

The error does not occur when I export the http and https_proxy variables before executing the conf file.

I've read in the documentation for Logstash that: " You can set environment variable references in the configuration for Logstash plugins by using ${var}"

However I don't understand what this means? I assume that I need to edit my conf file to add a reference to these variables, but I am not sure how to do this.

[aaron-nimocks]

Run printenv in your terminal. These are your enviromoment variables you can use. So if you want to use USER in logstash you would use ${USER} and that would be replaced by the value when you start your pipeline.

[goncalobsantos]

Thank you. That was helpful!

I've defined the HTTP and HTTPS_PROXY variable for the logstash user.

If I undestood correctly, I should now edit my conf file. However, I'm not sure about the syntax.

The example provided in the documentation uses the tcp_port variable. I assume that for the http, I still need to add:

http {
proxy => "${HTTP_PROXY}"
}

within the scope of input. Is this the correct syntax?

[aaron-nimocks]

@goncalobsantos

${HTTP_PROXY}

That looks corerct.