# SNMP inputs custom tag **URL:** \ **Category:** Telegraf\ **Tags:** telegraf\ **Created:** [September 16, 2024, 3:11pm UTC](https://community.influxdata.com/t/snmp-inputs-custom-tag/37025 "2024-09-16T15:11:06Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![romgo](https://avatars.discourse-cdn.com/v4/letter/r/ecc23a/32.png) [@romgo](https://community.influxdata.com/u/romgo)\ **Post date:** [September 16, 2024, 3:11pm UTC](https://community.influxdata.com/t/snmp-inputs-custom-tag/37025/1 "2024-09-16T15:11:06Z")
Hello, I am pretty much new to telegraf. Currently I have a bash script gathering some SNMP data from a remote host, and inject the results into influxDB with curl. This is working fine, but I wanted to migrate this script to telegraf instead. My current script do something like : ```auto UPTIME=$(snmpget -Oqv -v 2c -c community server sysptime) /usr/bin/curl --silent --request POST 'http://127.0.0.1:8086/write?db=mydb' --data-binary 'uptime,host=server value='$UPTIME'' ``` But with telegraf, I am able to get the data injected, but I’m not able to find a very simple way to add a tag with hostname of the server. ```auto [[inputs.snmp]] agents = ["server:161"] community = "public" [[inputs.snmp.field]] name = "uptime" oid = "sysuptime" ``` I tried different configuration like this one : ```auto [[inputs.snmp]] agents = ["server:161"] community = "public" [[inputs.snmp.field]] name = ["uptime", "server"] oid = "sysuptime" is_tag = true ``` but it doesn’t works. Thank you for your help. ---
**Author:** ![srebhan](https://sea1.discourse-cdn.com/flex023/user_avatar/community.influxdata.com/srebhan/32/8572_2.png) [@srebhan](https://community.influxdata.com/u/srebhan)\ **Post date:** [September 16, 2024, 3:20pm UTC](https://community.influxdata.com/t/snmp-inputs-custom-tag/37025/2 "2024-09-16T15:20:11Z")
@romgo the host tag is usually automatically added if you didn’t set `omit_hostname = true` in the [`agent` section](https://github.com/influxdata/telegraf/blob/master/docs/CONFIGURATION.md#agent) of your config… ---
**Author:** ![Hipska](https://sea1.discourse-cdn.com/flex023/user_avatar/community.influxdata.com/hipska/32/3877_2.png) [@Hipska](https://community.influxdata.com/u/Hipska)\ **Post date:** [September 16, 2024, 3:25pm UTC](https://community.influxdata.com/t/snmp-inputs-custom-tag/37025/3 "2024-09-16T15:25:04Z")
There’s also the `agent_host` tag by default. (run telegraf with `--test` to see what’s actually collected) You can also retrieve the hostname from the snmp device using this example: ```toml [[inputs.snmp.field]] oid = "RFC1213-MIB::sysUpTime.0" name = "sysUptime" conversion = "float(2)" [[inputs.snmp.field]] oid = "RFC1213-MIB::sysName.0" name = "sysName" is_tag = true ``` Adding a fixed tag is possible by adding this: ```toml [inputs.snmp.tags] server = "my hostname" ``` ---
**Author:** ![romgo](https://avatars.discourse-cdn.com/v4/letter/r/ecc23a/32.png) [@romgo](https://community.influxdata.com/u/romgo)\ **Post date:** [September 16, 2024, 3:30pm UTC](https://community.influxdata.com/t/snmp-inputs-custom-tag/37025/4 "2024-09-16T15:30:27Z")
I use telegraf 1.31.3, my conf : ```auto root@server ~ cat /etc/telegraf/telegraf.conf | grep omit omit_hostname = false ``` but when I query th data I don’t see the hostname ? ```auto > select gpu_core_temp from "snmp" limit 10; name: snmp time gpu_core_temp ---- ------------- 1726476285000000000 28 1726476290000000000 28 1726476300000000000 28 1726476310000000000 28 1726476320000000000 28 1726476330000000000 28 1726476340000000000 28 1726476350000000000 28 1726476360000000000 28 1726476370000000000 28 ``` thanks ! ---
**Author:** ![srebhan](https://sea1.discourse-cdn.com/flex023/user_avatar/community.influxdata.com/srebhan/32/8572_2.png) [@srebhan](https://community.influxdata.com/u/srebhan)\ **Post date:** [September 16, 2024, 6:46pm UTC](https://community.influxdata.com/t/snmp-inputs-custom-tag/37025/5 "2024-09-16T18:46:18Z")
Well if you only select one field you will only see that field… 😃 Try ```auto > select * from "snmp" limit 10; ``` ---
**Author:** ![romgo](https://avatars.discourse-cdn.com/v4/letter/r/ecc23a/32.png) [@romgo](https://community.influxdata.com/u/romgo)\ **Post date:** [September 17, 2024, 7:52am UTC](https://community.influxdata.com/t/snmp-inputs-custom-tag/37025/6 "2024-09-17T07:52:14Z")
thank you ! Indeed this was a PEBKAC issue ! Sorry 😅 I have a field agent\_host which do the job : > select gpu\_fan\_speed,agent\_host from “snmp” limit 10 side question : is there any good practice with regards on how to organize data within databases ? currently my snmp database mix various data coming from snmp, could this be an issue some how ? Regards ---
**Author:** ![Hipska](https://sea1.discourse-cdn.com/flex023/user_avatar/community.influxdata.com/hipska/32/3877_2.png) [@Hipska](https://community.influxdata.com/u/Hipska)\ **Post date:** [September 17, 2024, 7:57am UTC](https://community.influxdata.com/t/snmp-inputs-custom-tag/37025/7 "2024-09-17T07:57:24Z")
That’s why I said to use `--test`, then you see what metrics actually would be sent to InfluxDB. It’s not really a database like you know ‘relational’ databases, it’s a ‘time series’ database; so you have a bucket, with metrics (in this case you name it `snmp`) which can have different tags and fields. There’s no big issue with that, depending on how you query your data afterwards. If you’re just beginning with snmp and telegraf, I advise to also look at this blog post: [Telegraf Best Practices: SNMP Plugin | InfluxData](https://www.influxdata.com/blog/telegraf-best-practices-snmp-plugin/) ---
**Author:** ![romgo](https://avatars.discourse-cdn.com/v4/letter/r/ecc23a/32.png) [@romgo](https://community.influxdata.com/u/romgo)\ **Post date:** [September 17, 2024, 8:05am UTC](https://community.influxdata.com/t/snmp-inputs-custom-tag/37025/8 "2024-09-17T08:05:53Z")
> [@Hipska](#): > > post Thank you. I did give a try with --test, but I got too much data, and I was note sure that this will no affect current running telegraf service. I will review the blog post thanks.