Add Timestamp to a log value

[Kris]

Hallo and thank you in advance,

we use Zabbix to monitor a bunch of Logfiles via agent(active) and logrt these values are then displayed in a Grafana dashboard.
Unfortunately, some of the logs do not have a timestamp in front of the extracted value. Instead the Date and Time is in a different row or non-existend

for example:
------------------------------------------------------------------
1142 kopiert (109,5GB -> 109,5GB), 1 verschoben, 226 gelöscht
finished 18:16:19 29.07.2020
------------------------------------------------------------------

Is there a possibility to add the timestamp at the beginning of the value via preprocessing?

[Kris]

Is there some way to do this? Do I need to provide more information?

[Kris]

I guess the best way is using JavaScript in Preprocessing:

function(value){
  var today = new Date();
  var date = today.getFullYear()+'-'+(today.getMonth()+1)+'-'+today.getDate();
  var time = today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds();
  var dateTime = date+' '+time
  return dateTime+' '+value

}