In DM-27399 we showed how to send Kafka JMX metrics to InfluxDB using the Telegraf Prometheus input plugin.

We'll use that to monitor Mirror Maker 2 metrics. From KIP-382 there are these metrics available:

• replication-latency-ms(-avg/-min/-max): timespan between each record's timestamp and downstream ACK
• record-bytes(-avg/-min/-max): size of each record being replicated
• record-age-ms(-avg/-min/-max): age of each record when consumed
• record-count: number of records replicated
• checkpoint-latency-ms(-avg/-min/-max): timestamp between consumer group commit and downstream checkpoint ACK