# Logstash initialize variables before input

**URL:** https://discuss.elastic.co/t/logstash-initialize-variables-before-input/227684
**Category:** Logstash
**Created:** [April 12, 2020, 3:37pm UTC](https://discuss.elastic.co/t/logstash-initialize-variables-before-input/227684 "2020-04-12T15:37:40Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [April 12, 2020, 3:41pm UTC](https://discuss.elastic.co/t/logstash-initialize-variables-before-input/227684/2 "2020-04-12T15:41:51Z")

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Generate them externally to logstash and use environment variables, or alternatively, see [this](https://discuss.elastic.co/t/rest-api-http-poller-and-ruby-code/176447/2) post.

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