# Nested fields in syslog output plugin

**URL:** <https://discuss.elastic.co/t/nested-fields-in-syslog-output-plugin/267268>\
**Category:** Logstash\
**Created:** [March 15, 2021, 1:17pm UTC](https://discuss.elastic.co/t/nested-fields-in-syslog-output-plugin/267268 "2021-03-15T13:17:26Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![dsv](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dsv/32/47173_2.png) [@dsv](https://discuss.elastic.co/u/dsv)\
**Post date:** [March 15, 2021, 1:17pm UTC](https://discuss.elastic.co/t/nested-fields-in-syslog-output-plugin/267268/1 "2021-03-15T13:17:26Z")

</div>

Hey guys, i'm not able to send a nested field in the syslog output plugin.  
`syslog {`  
` host => "1.7.3.9"`  
` rfc => "rfc5424"`  
` codec => cef`  
` {`  
` delimiter => "|"`  
` fields => [`  
` "[destination][ip]",`  
` "message"`  
` ]`  
` }`  
` }`  
Not nested fields like message works good.

I've tried in syslog output fields array:  
` [destination][ip]`  
` destination.ip`  
` %{destination.ip}`  
` %{[destination.ip]}`  
` %{[destination][ip]}`

In the elasticsearch JSON documents the destination.ip field looks like:  
`"destination": {`  
` "domain": "mysrv.mydomain",`  
` "port": 80,`  
` "ip": "12.1.2.1"`  
` }`  
Thanks

Regards,  
Sergey

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [March 15, 2021, 2:59pm UTC](https://discuss.elastic.co/t/nested-fields-in-syslog-output-plugin/267268/2 "2021-03-15T14:59:54Z")

</div>

```
input { generator { count => 1 lines => ['foo'] } }
filter { mutate { add_field => { "[destination][ip]" => "12.1.2.1" } } }
output { stdout { codec => cef { delimiter => "|" fields => ["[destination][ip]", "message" ] } } }

```

results in

```
 [2021-03-15T10:56:07,552][INFO][logstash.agent] Pipelines running {:count=>1, :running_pipelines=>[:main], :non_running_pipelines=>[]}
 CEF:0|Elasticsearch|Logstash|1.0|Logstash|Logstash|6|destinationip=12.1.2.1 message=foo|[2021-03-15T10:56:07,718][INFO][logstash.javapipeline...

```

I suspect you want delimiter =\> '\n', rather than delimiter =\> "|".

---

<div class="post-metadata">

**Author:** ![dsv](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dsv/32/47173_2.png) [@dsv](https://discuss.elastic.co/u/dsv)\
**Post date:** [March 15, 2021, 4:54pm UTC](https://discuss.elastic.co/t/nested-fields-in-syslog-output-plugin/267268/3 "2021-03-15T16:54:33Z")

</div>

Great thanks!  
I really missed my [destination][ip] can be rarely nonzero.  
`fields => ["[destination][ip]" ]` works!  
Delimiter "|" is ok for me.

---

<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:** [April 12, 2021, 4:54pm UTC](https://discuss.elastic.co/t/nested-fields-in-syslog-output-plugin/267268/4 "2021-04-12T16:54:59Z")

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