# Pass Envt Variables to Logstash config file **URL:** \ **Category:** Logstash\ **Created:** [September 29, 2020, 2:23pm UTC](https://discuss.elastic.co/t/pass-envt-variables-to-logstash-config-file/250375 "2020-09-29T14:23:35Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![tusharnemade](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tusharnemade](https://discuss.elastic.co/u/tusharnemade)\ **Post date:** [September 29, 2020, 2:23pm UTC](https://discuss.elastic.co/t/pass-envt-variables-to-logstash-config-file/250375/1 "2020-09-29T14:23:36Z")
Hello Team I am having Logstash v7.8.0 installed along with Elasticsearch v7.8.0. My Requirement is 1. to run multiple logstash instances using pipelines via individual "conf" files. 2. These conf files , are having variables which are unique across the executions and I need to set them before running logstash. 3. My Logstash will run with the help of scheduler in interval of time period say 1 hour. I am not able to achieve : to have variables set before scheduler hitting logstash to read "conf" file and run it. I am using shell script to be executed before logstash runs.. but its not working. How to run shell script via logstash pipeline so that , I can have variables in respective "conf" files only and multiple times as its a scheduler run throughout the day. Thanks Tushar Nemade ---
**Author:** ![willemdh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/willemdh/32/16922_2.png) [@willemdh](https://discuss.elastic.co/u/willemdh)\ **Post date:** [September 29, 2020, 2:24pm UTC](https://discuss.elastic.co/t/pass-envt-variables-to-logstash-config-file/250375/2 "2020-09-29T14:24:59Z")
Try putting your env vars in /etc/default/logstash ---
**Author:** ![tusharnemade](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tusharnemade](https://discuss.elastic.co/u/tusharnemade)\ **Post date:** [September 29, 2020, 2:29pm UTC](https://discuss.elastic.co/t/pass-envt-variables-to-logstash-config-file/250375/3 "2020-09-29T14:29:36Z")
Hello I have configure logstash in my folder, its not rpm installation. Could you please help me where i can save my variables in manual installation.. And do i need to same then in a file ? and what should be name and how to call it in execution.. Thanks Tushar Nemade ---
**Author:** ![tusharnemade](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tusharnemade](https://discuss.elastic.co/u/tusharnemade)\ **Post date:** [September 29, 2020, 3:12pm UTC](https://discuss.elastic.co/t/pass-envt-variables-to-logstash-config-file/250375/4 "2020-09-29T15:12:25Z")
Hello I understand now , the file itself is /etc/default/logstash. My another query is , if I am having dynamic variable values ,which are changing as per every 1 hour of duration .. and logstash is running multiple instances via its own input plugin -\> elasticsearch --\> scheduler ... making sure /etc/default/logstash file is updated with latest variable will be a challenge in non-ideal / error situation. If there any way we can have shell script executed before logstash starts input / filter / output stuff from its conf file. Thanks Tushar Nemade ---
**Author:** ![tusharnemade](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tusharnemade](https://discuss.elastic.co/u/tusharnemade)\ **Post date:** [September 30, 2020, 3:46am UTC](https://discuss.elastic.co/t/pass-envt-variables-to-logstash-config-file/250375/5 "2020-09-30T03:46:18Z")
Hi Can someone please help me.. Thanks Tushar Nemade ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [October 28, 2020, 3:46am UTC](https://discuss.elastic.co/t/pass-envt-variables-to-logstash-config-file/250375/6 "2020-10-28T03:46:25Z")
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