This is an environment variable, but I can't get it to work? The tag save is, ${HOSTNAME}, not the environment variable value. https://www.elastic.co/guide/en/logstash/current/environment-variables.html#_setting_the_value_of_a_tag filter { mutate { add_tag => ["${HOSTNAME}"] } ... }

@magnusbaeck , With the help of elastic support, we figured this out. Turns out it was 2 easy changes to get it working. I am not saying that it was easy figuring this out, because it wasn't easy! mutate { add_tag => ["${HOSTNAME}"] } Add xpack.management.pipeline.id: to logstash.yml Create …

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Why doesn't add_tag => ["${HOSTNAME}"] work?

Elastic Stack Logstash

magnusbaeck (Magnus Bäck) April 24, 2018, 7:47pm 11

But now logstash logs an error!

Namely....?

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Why doesn't add_tag => ["${HOSTNAME}"] work?

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