telegraf and script command to send to grafana

Question

I have the following inputs in my telegraf.conf that go to Grafana. I can get the simpler first 3 examples to work but cannot get the 4th to work.

[[inputs.exec]]
commands = ["sh -c 'grep -i DatasetVersion /etc/aaa/systemnameX/configfile | cut -d'=' -f2'"]
name_override = "systemnameX"
timeout = "5s"
data_format = "value"
data_type = "string"
[inputs.exec.tags]
type = "dataset_version"

[[inputs.exec]]
commands = ["sh -c 'cat /root/config/OS_Version.txt | tr -d C'"]
name_override = "systemnameX"
timeout = "5s"
data_format = "value"
data_type = "string"
[inputs.exec.tags]
type = "os_version"

[[inputs.exec]]
commands = ["sh -c 'grep -i VERSION= /usr/bin/sw_install | head -1 | cut -d'=' -f2 '"]
name_override = "systemnameX"
timeout = "5s"
data_format = "value"
data_type = "string"
[inputs.exec.tags]
type = "sw_version"

[[inputs.exec]]
commands = ["/sbin/ifconfig eth0 | grep 'inet' | cut -d: -f2 | awk '{print $2}'"]
name_override = "systemnameX"
timeout = "5s"
data_format = "value"
data_type = "string"
[inputs.exec.tags]
type = "ip_address"

This is the error when I run the telegraf test

2021-09-04T06:36:51Z E! Error in plugin [inputs.exec]: exec: exit status 1 for command '/sbin/ifconfig eth0 | grep 'inet' | cut -d: -f2 | awk '{print $2}''

and when I put the exact command into a command line I get the following error:

awk: cmd. line:1: {print
awk: cmd. line:1:       ^ unexpected newline or end of string

Any help about how to fix the awk part would be greatly appreciated.

cheers, Tara

user_5866580 · Answer

I have tried running different permutations and combinations of your /sbin/ifconfig command but its giving me also same error. But I have read the telegraf manual and come up with following approach/steps.

I have tested this in Linux with Telegraf's 1.19.3 version and it worked fine for me.

Steps:

First thing first, don't waste your time(until someone posts an answer here), when we can create a script from your used commands in inputs.exec module of telegraf.
So in spite of running direct command in telegraf conf file create a script(eg: script.bash in my tested case) and place your command there like as follows:

cat /etc/telegraf/script.bash
#!/bin/bash
/sbin/ifconfig eth0 | grep 'inet' | cut -d: -f2 | awk '{print $2}'

OR you can also change your /sbin/ifconfig command to following in a single awk command:

/sbin/ifconfig eth0 | awk '/inet/{print $2}'

Now make following entry in your conf file:

[[inputs.exec]]
commands = ["/etc/telegraf/script.bash" ]
name_override = "systemnameX"
timeout = "5s"
data_format = "value"
data_type = "string"
[inputs.exec.tags]
type = "ip_address"

Restart your telegraf services once and test your status if your telegraf is operating fine or not by following command:

sudo -u telegraf telegraf -test -config /etc/telegraf/telegraf.conf

NOTE: I have created test script in /etc/telegraf/script.bash you can create it wherever you want to, but make sure you are giving absolute complete and correct path in conf file of telegraf.

telegraf and script command to send to grafana

1 Answers