My logs produce some content that I can see only when appended using (-A 20) or (- A 200). For Ex: While seeing a log from a docker container, I do :
docker logs [container_id] | grep "something" -A 20
Now i have implemnted ELK stack and collecting these logs using filebeats but the issue is I am unable to see those appended logs.
What should be done in the input section of filebeat.yml to get the appended result in kibana ?