MySQL/MariaDB/PostgreSQL/MongoDB master-slave replication. Business+.
engine_kind routing
- mysql_binlog — MySQL/MariaDB binlog
- pg_streaming — PG WAL streaming
- pg_logical — PG logical (selected tables)
- mongo_replica_set — Mongo replica set
Do NOT import legacy replication
Customer's "wild" pre-existing replications shouldn't be imported (config may conflict, state machine inconsistent). Correct flow: dump → NK new instance → import → set up replication.
Status + monitoring
seconds_behind_master / last_io_error / last_sql_error / state (running/behind/broken). Lag over threshold triggers alert.