# If condition in logstash filter - not working

**URL:** <https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577>\
**Category:** Logstash\
**Created:** [January 17, 2019, 7:08am UTC](https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577 "2019-01-17T07:08:17Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![gogularaja.sr](https://avatars.discourse-cdn.com/v4/letter/g/a88e57/32.png) [@gogularaja.sr](https://discuss.elastic.co/u/gogularaja.sr)\
**Post date:** [January 17, 2019, 7:08am UTC](https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577/1 "2019-01-17T07:08:17Z")

</div>

input {  
beats{  
port =\> 5044  
}  
}

########################################################################

filter {  
if [prospector.type] == "log" {  
}  
}

################################################################

output{  
if [prospector.type] == "log" {  
elasticsearch {  
hosts =\> ["localhost:9200"]  
index =\> "loglinux"  
}  
}  
}

I am using this above filter, but it is not working.

My Filebeat version : 6.5  
My Logstash version : 6.5.4

---

<div class="post-metadata">

**Author:** ![A\_B](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/a_b/32/17104_2.png) [@A\_B](https://discuss.elastic.co/u/A_B)\
**Post date:** [January 17, 2019, 7:40am UTC](https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577/2 "2019-01-17T07:40:13Z")

</div>

At least one thing you need to do is to separate the key levels with square brackets like this example from my Logstash config

```
  if [fields][index_type] == "postfix-maillog" {

```

So `if [prospector.type] == "log" {`  
should be `if [prospector][type] == "log" {`

---

<div class="post-metadata">

**Author:** ![gogularaja.sr](https://avatars.discourse-cdn.com/v4/letter/g/a88e57/32.png) [@gogularaja.sr](https://discuss.elastic.co/u/gogularaja.sr)\
**Post date:** [January 17, 2019, 8:42am UTC](https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577/3 "2019-01-17T08:42:17Z")

</div>

Ok Thanks. It works.

May i know, how to define multiple prospector type in filebeat configuration.

My Filebeat config.

filebeat.inputs:

- type: log  
enabled: true  
paths:
  - /var/log/auth.log

If i change the name of "type: log", it is throwing the error message. And unable to restart the filebeat service.

---

<div class="post-metadata">

**Author:** ![A\_B](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/a_b/32/17104_2.png) [@A\_B](https://discuss.elastic.co/u/A_B)\
**Post date:** [January 17, 2019, 8:50am UTC](https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577/4 "2019-01-17T08:50:29Z")

</div>

[The documentation](https://www.elastic.co/guide/en/beats/filebeat/current/configuration-filebeat-options.html) is quite good

_prospector_ is deprecated. They are called _input_ in later versions of Filebeat, just FYI.

What type are you trying to configure?

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<div class="post-metadata">

**Author:** ![gogularaja.sr](https://avatars.discourse-cdn.com/v4/letter/g/a88e57/32.png) [@gogularaja.sr](https://discuss.elastic.co/u/gogularaja.sr)\
**Post date:** [January 17, 2019, 10:32am UTC](https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577/5 "2019-01-17T10:32:51Z")

</div>

I am trying to configure like this in filebeat,

filebeat.inputs:

- type: log\_one  
enabled: true  
paths:

- type: log\_two  
enabled: true  
paths:

But it is not working.  
Also need to know, how to configure "if-condition" for this in logstash.

---

<div class="post-metadata">

**Author:** ![A\_B](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/a_b/32/17104_2.png) [@A\_B](https://discuss.elastic.co/u/A_B)\
**Post date:** [January 17, 2019, 10:44am UTC](https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577/6 "2019-01-17T10:44:55Z")

</div>

Looks like `type` is not what you expect 🙂 Did you read the documentation link I posted?

What you need to do is something like

```
filebeat.inputs:
- type: log
  paths:
    - /var/log/auth1.log
  fields:
    log_type: auth1
  fields_under_root: true
- type: log
  paths:
    - /var/log/auth2.log
  fields:
    log_type: auth2
  fields_under_root: true

```

This will create field `log_type` for all records with value `auth1`for the first input and value `auth2`for the second input.

---

<div class="post-metadata">

**Author:** ![gogularaja.sr](https://avatars.discourse-cdn.com/v4/letter/g/a88e57/32.png) [@gogularaja.sr](https://discuss.elastic.co/u/gogularaja.sr)\
**Post date:** [January 17, 2019, 10:52am UTC](https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577/7 "2019-01-17T10:52:01Z")

</div>

Ok Thanks a lot.

It works....

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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:** [February 14, 2019, 10:55am UTC](https://discuss.elastic.co/t/if-condition-in-logstash-filter-not-working/164577/8 "2019-02-14T10:55:41Z")

</div>

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