Small utility to get consumer lag from Kafka-stored consumer offsets.

There are 2 type of usage.

1. Using command line args:

   kafka-consumer-lag --brokers kafka01.home:6667,kafka02.home:6667 --topic topic_name --group-id consumer_group_id

The output of the command will be:

consumer_group_id topic_name consumer_group_id 123

Where 123 is an aggregated lag.

1. Using stdin:

   echo "consumer_group_id1 topic_name1" >> tmp.txt
   echo "consumer_group_id2 topic_name2" >> tmp.txt
   cat tmp.txt | kafka-consumer-lag --brokers kafka01.home:6667,kafka02.home:6667

The output of the command will be:

consumer_group_id1 topic_name1 123
consumer_group_id2 topic_name2 321

Also there is “timelag” command available:

kafka-consumer-lag --brokers kafka01.home:6667,kafka02.home:6667 --topic topic_name --group-id consumer_group_id --command lag_and_time

The output of the command will be:

consumer_group_id topic_name 456 123

Where 456 is lag in messages and 123 is lag in seconds for the last consumed message.

Compile for ubuntu:

env GOOS=linux GOARCH=amd64 go build -o kafka-consumer-lag-ubuntu