# Conditional IF in logstash's filter

**URL:** <https://discuss.elastic.co/t/conditional-if-in-logstashs-filter/85779>\
**Category:** Logstash\
**Created:** [May 15, 2017, 2:15pm UTC](https://discuss.elastic.co/t/conditional-if-in-logstashs-filter/85779 "2017-05-15T14:15:43Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Beuhlet\_Reseau](https://avatars.discourse-cdn.com/v4/letter/b/e95f7d/32.png) [@Beuhlet\_Reseau](https://discuss.elastic.co/u/Beuhlet_Reseau)\
**Post date:** [May 15, 2017, 2:15pm UTC](https://discuss.elastic.co/t/conditional-if-in-logstashs-filter/85779/1 "2017-05-15T14:15:43Z")

</div>

Hello, i work on conditional filter in logstash.

Currently it's not working ☹

Here a few example of line in my file :

```
20170415020000;Nb_RQ_live-C-FWK-WRK-DM-2;server5;2
20170415020000;Nb_RQ_live-C-FWK-WRK-DM-2;server2;5
20170415020000;Nb_RQ_live-C-FWK-WRK-DM-1;7

20170415021000;RAM_process-C-FWK-RQ-3;server5;POV;901.906
20170415021000;RAM_process-C-FWK-RQ-3;server2;POV;846.59
20170415021000;RAM_process-C-FWK-RQ-3;server5;CORB;3246.39
20170415021000;RAM_process-C-FWK-RQ-3;server2;CORB;2996.37

20170415021000;LU_Total_Refresh-C-FWK_STP-3;server5;POV;8
20170415021000;LU_Total_Terminate-C-FWK_STP-3;server5;POV;0
20170415021000;LU_Number_Delete-C-FWK_STP-3;server5;POV;0

```

So, i use this to parse my file (not complet) :

```
filter {
if [type] == "q_compteur" {
 if [message] =~ /^"Nb_RQ_live-C-FWK-WRK-DM-2"/ {
    csv {
      columns => ["RQ_live_date", "Name_RQ_live", "server", "Nb_RQ_live"]
        separator => ";"
        }

    mutate {
        remove_field => ["message", "tags", "host", "path"]
        convert => {
                   "Nb_RQ_live" => "integer"
                   }
           }

    date {
      match => ["RQ_live_date" , "YYYYMMddHHmmss"]
      remove_field => ["RQ_live_date"]
         }
                                                                                  }
                                                                                  
    else if [message] =~ /^"Nb_RQ_live-C-FWK-WRK-DM-1"/ {
    csv {
      columns => ["RQ_live_date", "Name_RQ_live_total", "Nb_RQ_live_total"]
        separator => ";"
        }

    mutate {
        remove_field => ["message", "tags", "host", "path"]
        convert => {
                   "Nb_RQ_live_total" => "integer"
                   }
           }

    date {
      match => ["RQ_live_date" , "YYYYMMddHHmmss"]
      remove_field => ["RQ_live_date"]
         }
                                                                                  }                                                                              
                                                                                  
    else if [message] =~ /^"LU_Total_Refresh-C-FWK_STP-3"/ {
    csv {
      columns => ["LU_refresh_date", "Name_LU_refresh", "server", "Type_refresh", "Nb_refresh"]
        separator => ";"
        }

    mutate {
        remove_field => ["message", "tags", "host", "path"]
        convert => {
                   "Nb_refresh" => "integer"
                   }
           }

    date {
      match => ["LU_refresh_date" , "YYYYMMddHHmmss"]
      remove_field => ["LU_refresh_date"]
         }
                                                                                  }
    else if [message] =~ /^"LU_Number_Delete-C-FWK_STP-3"/ {[..........]

```

Is the good method ? I have other lines in file but i don't need.

---

<div class="post-metadata">

**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:** [May 15, 2017, 2:51pm UTC](https://discuss.elastic.co/t/conditional-if-in-logstashs-filter/85779/2 "2017-05-15T14:51:42Z")

</div>

> if [message] =~ /^"Nb\_RQ\_live-C-FWK-WRK-DM-2"/ {

This condition will never be true because none of your log lines begin with "Nb\_RQ\_live-C-FWK-WRK-DM-2". Perhaps you should say

```
if [message] =~ /;Nb_RQ_live-C-FWK-WRK-DM-2;/ {

```

instead.

---

<div class="post-metadata">

**Author:** ![Beuhlet\_Reseau](https://avatars.discourse-cdn.com/v4/letter/b/e95f7d/32.png) [@Beuhlet\_Reseau](https://discuss.elastic.co/u/Beuhlet_Reseau)\
**Post date:** [May 17, 2017, 12:07pm UTC](https://discuss.elastic.co/t/conditional-if-in-logstashs-filter/85779/3 "2017-05-17T12:07:57Z")

</div>

It's very bizare , because it's seems to perform with this syntax !

I will change for your syntaxe but currently it's good.

You find good my method ?

=\> Match line with IF  
=\> ELSE IF for other matching  
=\> Others lines are drop (at the end **else {{drop}}** )

EDIT : NOO, i use it for match line excuse me :

`if [message] =~ "\bSession_PolicyManager_G5R2-C-PM-GX-REQ-3-Schema-Type-NbSession\b" {`

I believe it said all line with this characters are matched

---

<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:** [June 14, 2017, 12:07pm UTC](https://discuss.elastic.co/t/conditional-if-in-logstashs-filter/85779/4 "2017-06-14T12:07:57Z")

</div>

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