# Validation of logstash config

**URL:** <https://discuss.elastic.co/t/validation-of-logstash-config/118105>\
**Category:** Logstash\
**Created:** [February 1, 2018, 8:59pm UTC](https://discuss.elastic.co/t/validation-of-logstash-config/118105 "2018-02-01T20:59:51Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Vafa\_Ronaghi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vafa_ronaghi/32/43519_2.png) [@Vafa\_Ronaghi](https://discuss.elastic.co/u/Vafa_Ronaghi)\
**Post date:** [February 1, 2018, 8:59pm UTC](https://discuss.elastic.co/t/validation-of-logstash-config/118105/1 "2018-02-01T20:59:51Z")

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Hello all,  
Following situation:  
I am running a logstash-5.6.4 in a docker container. This is an ansible project in a gitlab.  
Everytime I change something in logstash config, gitlab starts a pipeline to build all required files and  
and perform a deployment into docker container.

Is it possible to validate the configuration with " **--config.test\_and\_exit**" before its getting deployed to docker container ?

I mean is there any possibility within logstash to do this ?

Thanks in forward  
Vafa

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<div class="post-metadata">

**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [February 1, 2018, 9:06pm UTC](https://discuss.elastic.co/t/validation-of-logstash-config/118105/2 "2018-02-01T21:06:02Z")

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That shouldn't be too hard to do. How are you starting the container (how does Logstash access the configuration files)? What image are you using?

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<div class="post-metadata">

**Author:** ![Vafa\_Ronaghi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vafa_ronaghi/32/43519_2.png) [@Vafa\_Ronaghi](https://discuss.elastic.co/u/Vafa_Ronaghi)\
**Post date:** [February 1, 2018, 9:32pm UTC](https://discuss.elastic.co/t/validation-of-logstash-config/118105/3 "2018-02-01T21:32:11Z")

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I use standard loghstash image from elastic in version 5.6.4 .  
I start the container with a systemctl service file which is also getting created during build process.  
Logstash access the configuration within container ,

It is as following:

> ```
> [Unit]
> Description=Logstash 5.6.4
> After=docker.service
> After=appdata-container-logshipper.mount
> Requires=docker.service
> OnFailure=notify-failed@%n
> 
> [Service]
> ExecStartPre=-/usr/bin/docker pull registry/elastic/logstash:5.6.4
> ExecStartPre=-/usr/bin/docker rm --force --volumes %n
> ExecStart=/usr/bin/docker run --name=%n \
> --user root \
> --add-host "redishub:2.57.0.1" \
> --volume /appdata/log/:/logs \
> --volume /appdata/container/logshipper/logstash/config/logstash.yml:/usr/share/logstash/config/logstash.yml:z \
> --volume /appdata/container/logshipper/logstash/config/logstash-jvm.options:/usr/share/logstash/config/jvm.options:z,ro \
> --volume /appdata/container/logshipper/logstash/pipeline:/usr/share/logstash/pipeline:z,ro \
> --volume /appdata/container/logshipper/logstash/patterns:/usr/share/logstash/patterns:z,ro \
> --volume /appdata/container/logshipper/logstash/sincedb:/usr/share/logstash/sincedb:z \
> --env "TZ=Europe/Berlin" \
> --volume /dev/urandom:/dev/random \
> registry/elastic/logstash:5.6.4
> ExecStop=/usr/bin/docker stop %n
> Restart=always
> RestartSec=120
> StartLimitInterval=0
> TimeoutStartSec=10min
> 
> ```

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<div class="post-metadata">

**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [February 2, 2018, 7:15am UTC](https://discuss.elastic.co/t/validation-of-logstash-config/118105/4 "2018-02-02T07:15:37Z")

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You can start a container based on that image and supply your own options, including `--config.test_and_exit`. Make sure you mount the config files into the container but avoid the log and sincedb directory.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 2, 2018, 7:15am UTC](https://discuss.elastic.co/t/validation-of-logstash-config/118105/5 "2018-03-02T07:15:48Z")

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