# How to Filter Desired Container Logs in Docker Integration in Fleet？

**URL:** <https://discuss.elastic.co/t/how-to-filter-desired-container-logs-in-docker-integration-in-fleet/329030>\
**Category:** Elastic Agent\
**Created:** [March 31, 2023, 8:43am UTC](https://discuss.elastic.co/t/how-to-filter-desired-container-logs-in-docker-integration-in-fleet/329030 "2023-03-31T08:43:41Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![XYYYYY](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xyyyyy/32/119267_2.png) [@XYYYYY](https://discuss.elastic.co/u/XYYYYY)\
**Post date:** [March 31, 2023, 8:43am UTC](https://discuss.elastic.co/t/how-to-filter-desired-container-logs-in-docker-integration-in-fleet/329030/1 "2023-03-31T08:43:42Z")

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Hello everyone, I am a newcomer using elastic agent. I have tried to collect container logs using Docker integration, but I have a wide variety of container logs. I only want to obtain a few of them. How can I achieve this?

I am currently trying to use the Condition option in Collect Docker Container Logs to set the container filter I want, but I am not sure how to input to filter out the container I want, or use additional Processors. I hope you can answer. Thank you.

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/3/8/386b7216987b1a4bf1d576dd19e07e9fad431fd2.png)

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**Author:** ![XYYYYY](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xyyyyy/32/119267_2.png) [@XYYYYY](https://discuss.elastic.co/u/XYYYYY)\
**Post date:** [March 31, 2023, 9:02am UTC](https://discuss.elastic.co/t/how-to-filter-desired-container-logs-in-docker-integration-in-fleet/329030/2 "2023-03-31T09:02:15Z")

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The current situation is that I am trying to use wildcards or regular expressions to implement this function, because I can obtain the container name I want through container.image.name. The names of the container logs I want to collect start with a fixed format (ed) , so I wonder if this can be done, and how to achieve it?

 ![de18cdb54a14b4fc9abac1338f6990f](https://us1.discourse-cdn.com/elastic/original/3X/3/4/3430d8a3a5cdacb1ebf95e8e05865832226fb746.png)

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**Author:** ![stephenb](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/stephenb/32/40856_2.png) [@stephenb](https://discuss.elastic.co/u/stephenb)\
**Post date:** [April 3, 2023, 1:53am UTC](https://discuss.elastic.co/t/how-to-filter-desired-container-logs-in-docker-integration-in-fleet/329030/3 "2023-04-03T01:53:02Z")

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Hi @XYYYYY Welcome to the community!

Please take a look at this...

EDIT Fixed Image

 ![image (2)](https://us1.discourse-cdn.com/elastic/original/3X/6/3/63a01ac1c7fdfeaadf4d0375cb2e72bc4ebe39f1.png)

See how conditions work [here](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html) with [specific examples here.](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#condition-examples)

and what variables the k8s provider populates [here](http://elastic.co/guide/en/fleet/master/kubernetes-provider.html#_provider_for_pod_resources)

As far as I can tell the condition does not support Regex but it supports a lot, if you can give some samples / examples perhaps we can help

> ##### Condition syntax
> 
> The conditions supported by Elastic Agent are based on [EQL](https://www.elastic.co/guide/en/elasticsearch/reference/master/eql-syntax.html)'s boolean syntax, but add support for variables from providers and functions to manipulate the values.
> 
> **Supported operators:**
> 
> - Full PEMDAS math support for `+ - * / %`.
> - Relational operators `< <= >= > == !=`
> - Logical operators `and` and `or`
> 
> **Functions:**
> 
> - Array functions [`arrayContains`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#arrayContains-function)
> - Dict functions [`hasKey`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#hasKey-function) (not in EQL)
> - Length functions [`length`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#length-function)
> - Math functions [`add`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#add-function), [`subtract`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#subtract-function), [`multiply`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#multiply-function), [`divide`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#divide-function), [`modulo`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#modulo-function)
> - String functions [`concat`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#concat-function), [`endsWith`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#endsWith-function), [`indexOf`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#indexOf-function), [`match`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#match-function), [`number`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#number-function), [`startsWith`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#startsWith-function), [`string`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#string-function), [`stringContains`](https://www.elastic.co/guide/en/fleet/master/dynamic-input-configuration.html#stringContains-function)

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<div class="post-metadata">

**Author:** ![XYYYYY](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xyyyyy/32/119267_2.png) [@XYYYYY](https://discuss.elastic.co/u/XYYYYY)\
**Post date:** [April 3, 2023, 2:10am UTC](https://discuss.elastic.co/t/how-to-filter-desired-container-logs-in-docker-integration-in-fleet/329030/4 "2023-04-03T02:10:33Z")

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Thank you very much for your reply! which made me feel the good atmosphere and friendliness of this community. I will read it carefully and hope it can solve my problem 😃 😃 😃

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**Author:** ![XYYYYY](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xyyyyy/32/119267_2.png) [@XYYYYY](https://discuss.elastic.co/u/XYYYYY)\
**Post date:** [April 3, 2023, 9:16am UTC](https://discuss.elastic.co/t/how-to-filter-desired-container-logs-in-docker-integration-in-fleet/329030/5 "2023-04-03T09:16:54Z")

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Please take a look at my configuration here. If I only want to obtain the container log with the image name beginning with "ed" in the docker, and whether this writing is correct, I observe that it does not seem to be effective

Perhaps I shouldn't use `stringContains (${docker. name}, 'ed')`

Should use `arrayContains (${docker. name}, 'ed *')`？

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/2/6/268e885384c15599531171c95d56ab37c0e087c9.png)

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<div class="post-metadata">

**Author:** ![XYYYYY](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xyyyyy/32/119267_2.png) [@XYYYYY](https://discuss.elastic.co/u/XYYYYY)\
**Post date:** [April 3, 2023, 9:20am UTC](https://discuss.elastic.co/t/how-to-filter-desired-container-logs-in-docker-integration-in-fleet/329030/6 "2023-04-03T09:20:10Z")

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I have noticed that there is a time difference between us. I am currently working in the afternoon. Due to work restrictions, I can only log in to the community during working hours. I hope you can understand. Thank you very much 🙂

This is my current docker filestream configuration

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/8/9/89e575a6e5ea61b9cc7068398a5d09a0300f756e.png)

```auto
    "docker-filestream": {
      "enabled": true,
      "streams": {
        "docker.container_logs": {
          "enabled": true,
          "vars": {
            "condition": "stringContains(${docker.name}, 'ed')",
            "paths": [
              "/var/lib/docker/containers/${docker.container.id}/*-json.log"
            ],
            "additionalParsersConfig": "# - ndjson:\n# target: json\n# ignore_decoding_error: true\n# - multiline:\n# type: pattern\n# pattern: '^\\['\n# negate: true\n# match: after\n",
            "containerParserStream": "all",
            "processors": "- rename:\r\n fields:\r\n - from: \"container.image\"\r\n to: \"container.image.name\"\r\n ignore_missing: true\r\n fail_on_error: false"
          }
        }
      }
    }

```

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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:** [May 1, 2023, 9:20am UTC](https://discuss.elastic.co/t/how-to-filter-desired-container-logs-in-docker-integration-in-fleet/329030/7 "2023-05-01T09:20:50Z")

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