# Need Help on Logstash filter If-Else Condition

**URL:** <https://discuss.elastic.co/t/need-help-on-logstash-filter-if-else-condition/239333>\
**Category:** Logstash\
**Created:** [June 30, 2020, 3:12pm UTC](https://discuss.elastic.co/t/need-help-on-logstash-filter-if-else-condition/239333 "2020-06-30T15:12:32Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Kim\_Mendoza](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kim_mendoza/32/45388_2.png) [@Kim\_Mendoza](https://discuss.elastic.co/u/Kim_Mendoza)\
**Post date:** [June 30, 2020, 3:12pm UTC](https://discuss.elastic.co/t/need-help-on-logstash-filter-if-else-condition/239333/1 "2020-06-30T15:12:32Z")

</div>

Please check my Logstash filter config. I cannot find my error logs cannot transfer to elasticsearch.

* * *

filter {  
if [fields][logtype] == "access.log" {  
grok {  
match =\> ["message", "%{WORD:host} %{WORD:host}[ "%{NOTSPACE:Domain}"] %{WORD:remote} %{WORD:remote}[(?\<x\_forwarded\_for\>%{IP:clientip}(?:, [^,]+)\*)?%{DATA} [%{MONTHDAY}[./-]%{MONTH}[./-]%{YEAR}:%{TIME} %{ISO8601\_TIMEZONE}] / %{IP:localIP}] %{WORD:request}["%{WORD:request} %{URIPATHPARAM} HTTP/%{NUMBER:httpversion}"] %{WORD:Code} %{WORD:Code}[%{NUMBER:response}]" ]  
overwrite =\> ["message"]  
}  
}

```
    mutate {
            add_field => {"nameserver" => "%{[fields][platform]}-%{[host][name]}"}

          }

```

}

* * *

---

<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:** [July 28, 2020, 3:12pm UTC](https://discuss.elastic.co/t/need-help-on-logstash-filter-if-else-condition/239333/2 "2020-07-28T15:12:38Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.