title: Relabelling in prometheus
body: <p>I am trying to relabel after copying the existing metrics for Kafka only for below match</p>
  
  <p>Kafka_log_size{partition=“1”, topic=“ab_bc_cd_12345_ef_001”,} 10</p>
  
  <p>I want output as :
  Kafka_log_size{partition=“1”, topic=“ab_bc_cd_12345_ef_001”,} 10
  Kafka_log_size_uniq{partition=“1”, uniq=“12345”,} 10</p>
  
  <p>From reading multiple articles , it seems this can be achieved by relabeling . But not sure how to start with please advise . Thanks</p>