# Logstash translate plugin dynamic dictionary path

**URL:** <https://discuss.elastic.co/t/logstash-translate-plugin-dynamic-dictionary-path/129889>\
**Category:** Logstash\
**Created:** [April 27, 2018, 9:04pm UTC](https://discuss.elastic.co/t/logstash-translate-plugin-dynamic-dictionary-path/129889 "2018-04-27T21:04:03Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![krishna\_chaitanya](https://avatars.discourse-cdn.com/v4/letter/k/b5a626/32.png) [@krishna\_chaitanya](https://discuss.elastic.co/u/krishna_chaitanya)\
**Post date:** [April 27, 2018, 9:04pm UTC](https://discuss.elastic.co/t/logstash-translate-plugin-dynamic-dictionary-path/129889/1 "2018-04-27T21:04:03Z")

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Hi,

I am creating a csv file which I want to use as a dictionary inside translate plugin.  
Since the mapping might change the next day, I named my csv file this way:

**my-mapping-_`YYYY-MM-dd`_.csv**

where YYYY, MM, dd are year, month, date respectively.

I would like to read the latest csv file through the translate plugin. So, the logstash configuration used:

```
translate {
    field => "id"
    destination => "name"
    dictionary_path => "/home/my-mapping-%{+YYYY-MM-dd}.csv"
}

```

But, looks like `dictionary_path` parameter is unable to resolve `%{+YYYY-MM-dd}`  
This is the error I got with it:

```
Invalid setting for translate filter plugin:
filter {
    translate {
      # This setting must be a path
      # File does not exist or cannot be opened /home/my-mapping-%{+YYYY-MM-dd}.csv
      dictionary_path => "/home/my-mapping-%{+YYYY-MM-dd}.csv"

```

Any workaround for this problem?

Thanks

---

<div class="post-metadata">

**Author:** ![krishna\_chaitanya](https://avatars.discourse-cdn.com/v4/letter/k/b5a626/32.png) [@krishna\_chaitanya](https://discuss.elastic.co/u/krishna_chaitanya)\
**Post date:** [April 27, 2018, 9:40pm UTC](https://discuss.elastic.co/t/logstash-translate-plugin-dynamic-dictionary-path/129889/2 "2018-04-27T21:40:08Z")

</div>

As a workaround, I am able to achieve this using Environment variables.

`export DATE=$(date +%F)`

Then inside config:

`dictionary_path => "/home/my-mapping-${DATE}.csv"`

Any better solutions are welcome.

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**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:** [April 28, 2018, 3:23pm UTC](https://discuss.elastic.co/t/logstash-translate-plugin-dynamic-dictionary-path/129889/3 "2018-04-28T15:23:24Z")

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Your solution obviously requires you to restart Logstash every day but apart from that it's probably the best available solution at this point.

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<div class="post-metadata">

**Author:** ![krishna\_chaitanya](https://avatars.discourse-cdn.com/v4/letter/k/b5a626/32.png) [@krishna\_chaitanya](https://discuss.elastic.co/u/krishna_chaitanya)\
**Post date:** [April 30, 2018, 4:44pm UTC](https://discuss.elastic.co/t/logstash-translate-plugin-dynamic-dictionary-path/129889/4 "2018-04-30T16:44:27Z")

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Thanks for suggesting about restarting logstash. Didn't occur to mind.

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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 28, 2018, 4:44pm UTC](https://discuss.elastic.co/t/logstash-translate-plugin-dynamic-dictionary-path/129889/5 "2018-05-28T16:44:33Z")

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