# Help for new logstash filter : docker metadata
**URL:** https://discuss.elastic.co/t/help-for-new-logstash-filter-docker-metadata/24237
**Category:** Logstash
**Created:** [June 24, 2015, 7:16am UTC](https://discuss.elastic.co/t/help-for-new-logstash-filter-docker-metadata/24237 "2015-06-24T07:16:48Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@tgermain](https://discuss.elastic.co/u/tgermain)
#### Post date: [June 24, 2015, 7:16am UTC](https://discuss.elastic.co/t/help-for-new-logstash-filter-docker-metadata/24237/1 "2015-06-24T07:16:48Z")
(from [https://github.com/elastic/logstash/issues/3494](https://github.com/elastic/logstash/issues/3494) )
Hi,
I'm trying to adapt this fluentd filter ([https://github.com/fabric8io/fluent-plugin-docker\_metadata\_filter](https://github.com/fabric8io/fluent-plugin-docker_metadata_filter)) into a logstash filter.
It does not seam really hard. The plugin basically do :
1. extract the id of the container from the path of it's logfile
2. call the docker api to get metadata with `Docker::Container.get(container_id).info`
3. put those metadata into fields
Since I don't have any Ruby background, I'm struggling to adapt the code and to test it.
Any help would be welcome.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 5:36am UTC](https://discuss.elastic.co/t/help-for-new-logstash-filter-docker-metadata/24237/2 "2017-07-06T05:36:39Z")