Filebeat allow only specific line or content

[abhi.logs (Abhi)]

Hello,

How can I allow only specific lines and for specific log files as well?
example: I have lots of files in the inputs.d file but for the xyz.log file, I wanna set up the filter only to allow "out of memory" line other events will drop for only xyz.log file

[Andrea_Spacca]

Hello @abhi.logs ,

do you have a single yaml config file that covers only xyz.log in inputs.d?

you could probably use the drop_event processor (Drop events | Filebeat Reference [8.2] | Elastic) with a negative condition on message field containing "out of memory"

[abhi.logs (Abhi)]

Hello @Andrea_Spacca

No I have 4-5 config files inside inputs.d and I just wanna apply to xyz.log file only.

[Andrea_Spacca]

hello @abhi.logs

which one is the input for xyz.log file?
could you share the content?

[abhi.logs (Abhi)]

helllo @Andrea_Spacca
This is xyz.yml file inside inputs.d.like this I have 4-5 *.yml file for different logs

- type: log

  enabled: True

  paths:
    - /var/log/xvy.log
  exclude_files: ['[a-z A-Z]+-[0-9]{4}-[0-9]{2}-[0-9]{2}.json']
  fields:  
    log_type: kernel-log

[Andrea_Spacca]

something like this should work

- type: log

  enabled: True

  paths:
    - /var/log/xvy.log
  exclude_files: ['[a-z A-Z]+-[0-9]{4}-[0-9]{2}-[0-9]{2}.json']
  fields:  
    log_type: kernel-log
  processors:
    - drop_event:
        when:
          not:
            contains:
              message: "out of memory"