Date pattern in file input path


(shashwat) #1

Hi,

I am in need to read files from different folders. These folders are maintained daily in the format of dates. e.g. 20170912, 20170911 etc.

I am trying the file input path as "var/opt/data/%{+YYYY}%{+MM}%{+dd}/*.txt" but it is not working.
How can I read files in such a case?

Thanks,


(Magnus Bäck) #2

There's no automatic way of selecting "file of the day". Can't you just use a wildcard and have Logstash read all files as soon as they become available?


#3

Depending on your platform you might be able to set an environment variable to the name and then reference that in the config. For example, I have a nightly job that processes the prior day index. In the script that runs I set

 INDEXDATE=`date --date="-1 day" '+%Y.%m.%d'`

and in the logstash configuration I have an elasticsearch input that reads

index => "logstash-${INDEXDATE}"


(shashwat) #4

Actually , there are other files/folders also in that directory besides these date formatted folders. I do not want to process all that data. I just need to target these date specific folders. For wildcard , either I give something like /var/opt/data/2017*/*.txt . Can you please suggest any better way?


(Magnus Bäck) #5

If you can find a wildcard that matches the files you want to capture and nothing else I'd say go for it. Otherwise you'll have to periodically generate a configuration file with specific paths or use @Badger's solution with an environment variable.


(system) #6

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