# How to avoid the repetition of code in the output section in Logstash

**URL:** <https://discuss.elastic.co/t/how-to-avoid-the-repetition-of-code-in-the-output-section-in-logstash/205792>\
**Category:** Logstash\
**Created:** [October 30, 2019, 5:31am UTC](https://discuss.elastic.co/t/how-to-avoid-the-repetition-of-code-in-the-output-section-in-logstash/205792 "2019-10-30T05:31:25Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![arunpmohan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/arunpmohan/32/69467_2.png) [@arunpmohan](https://discuss.elastic.co/u/arunpmohan)\
**Post date:** [October 30, 2019, 5:31am UTC](https://discuss.elastic.co/t/how-to-avoid-the-repetition-of-code-in-the-output-section-in-logstash/205792/1 "2019-10-30T05:31:25Z")

</div>

Here is the snippet of my output section of logstash:

```
output {
if ["log_type"] == "syslog" {
if "vcsa-4-westus2" in [message] {
elasticsearch {
        hosts => ["elastic-monitor.service.discover:9200"]
        user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]
        index => "monitor-nsos-photon-%{+YYYY.ww}"
        }
  }

if "vcsa-4-westus2" not in [message] {
elasticsearch {
        hosts => ["elastic-monitor.service.discover:9200"]
        user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]	
        index => "monitor-nsos-vmkernel-%{+YYYY.ww}"
        }
}

else {
elasticsearch {
        hosts => ["elastic-monitor.service.discover:9200"]
        user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]	
        index => "monitor-nsos-pfsense-%{+YYYY.ww}"
        }
}
}

if [beatName] == "filebeat" {
    if [osName] == "vyos"{
                elasticsearch {
                        hosts => ["elastic-monitor.service.discover:9200"]
                        user => ${username}
                        password => ${password}
                        ssl_certificate_verification => false
                        ssl => false
                        cacert => "/home/testuser/ca-demo.pem"
                        hosts => ["https://elastic-monitor.service.discover:9200"]	
                        index => "monitor-nsos-vyos-%{beatName}-%{+YYYY.ww}"
                        }
                 }
    else {
      elasticsearch {
        hosts => ["elastic-monitor.service.discover:9200"]
        user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]	
        index => "monitor-%{beatName}-%{+YYYY.ww}"
        }
    }
}

if [beatName] == "auditbeat" {
    if [osName] == "vyos"{
                elasticsearch {
                        hosts => ["elastic-monitor.service.discover:9200"]
                        user => ${username}
                        password => ${password}
                        ssl_certificate_verification => false
                        ssl => false
                        cacert => "/home/testuser/ca-demo.pem"
                        hosts => ["https://elastic-monitor.service.discover:9200"]	
                        index => "monitor-nsos-vyos-%{beatName}-%{+YYYY.ww}"
                        }
                }
    else {
        elasticsearch {
        hosts => ["elastic-monitor.service.discover:9200"]
        user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]	
        index => "monitor-%{beatName}-%{+YYYY.ww}"
        }
    }
}

if [beatName] == "winlogbeat" {
        elasticsearch {
        hosts => ["elastic-monitor.service.discover:9200"]
        user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]	
        index => "monitor-%{beatName}-%{+YYYY.ww}"
        }
    }
if [logPath] == "radacct" {
elasticsearch {
     hosts => ["elastic-monitor.service.discover:9200"]
     index => "monitor-switch-log-%{+YYYY.ww}"
     user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]	
        index => "monitor-switch-log-%{+YYYY.ww}"
        }
}

if [host][name] == "pfSense" and [type] == "beatsdata" {
elasticsearch {
        hosts => ["elastic-monitor.service.discover:9200"]
        user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]	
        index => "monitor-nsos-pfsense-filebeat-%{+YYYY.ww}"
        }
  }

 if [fields][log_type] == "nexus" or [source_of_log]== "Api_ingestor" or [syslog_field] == "syslog" 
    {
      elasticsearch {
        hosts => ["elastic-monitor.service.discover:9200"]
        user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]	
        index => "monitor-api_ingester-%{+YYYY.ww}"
      }
    }

if [log_type] == "http" {
elasticsearch {
        hosts => ["elastic-monitor.service.discover:9200"]
        user => ${username}
        password => ${password}
        ssl_certificate_verification => false
        ssl => false
        cacert => "/home/testuser/ca-demo.pem"
        hosts => ["https://elastic-monitor.service.discover:9200"]	
        index => "monitor-dev42_log-%{+YYYY.ww}"
      }
}

```

As you can see there is a significant duplication of the below code section  
hosts =\> ["elastic-monitor.service.discover:9200"]  
user =\> {username} password =\> {password}  
ssl\_certificate\_verification =\> false  
ssl =\> false  
cacert =\> "/home/testuser/ca-demo.pem"  
hosts =\> ["[https://elastic-monitor.service.discover:9200](https://elastic-monitor.service.discover:9200)"]

Only the index names are changing. How to avoid this?.  
I tired writing an if condition inside the elasticsearch output, but it was not working. Any ideas?

---

<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [October 30, 2019, 5:59am UTC](https://discuss.elastic.co/t/how-to-avoid-the-repetition-of-code-in-the-output-section-in-logstash/205792/2 "2019-10-30T05:59:23Z")

</div>

If the index name prefix is the only thing differing, you can store the index prefix in a metadata field within your filter block and then use this in a single elasticsearch output block.

```auto
...
else if [logPath] == "radacct" {
  mutate {
    add_field => { "[@metadata][index_prefix]" => "monitor-switch-log" }
  }
}
else if [beatName] == "winlogbeat" {
  ...

```

```auto
elasticsearch {
  ...
  index => "%{[@metadata][index_prefix]}-%{+YYYY.ww}"
}

```

---

<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:** [November 27, 2019, 5:59am UTC](https://discuss.elastic.co/t/how-to-avoid-the-repetition-of-code-in-the-output-section-in-logstash/205792/3 "2019-11-27T05:59:34Z")

</div>

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