curl 'http://my-connect-cluster-connect-api:8083/connectors' -X POST -i -H "Content-Type:application/json" -d '{
  "name": "mongodb-connector",
  "config": {
    "connector.class": "io.debezium.connector.mongodb.MongoDbConnector",
    "mongodb.hosts": "MainRepSet/mongod-0.mongodb-service.kafka.svc.cluster.local:27017,mongod-1.mongodb-service.kafka.svc.cluster.local:27017,mongod-2.mongodb-service.kafka.svc.cluster.local:27017",
    "mongodb.name": "MainRepSet",
    "collection.whitelist": "springdatabase[.]*",
    "mongodb.user": "springuser",
    "mongodb.password": "password"
  }
}'

2019-01-29 13:13:40,170 ERROR Error while reading the 'shards' collection in the 'config' database: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=mongod-2.mongodb-service.kafka.svc.cluster.local:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSecurityException: Exception authenticating MongoCredential{mechanism=null, userName='springuser', source='admin', password=<hidden>, mechanismProperties={}}}, caused by {com.mongodb.MongoCommandException: Command failed with error 18: 'Authentication failed.' on server mongod-2.mongodb-service.kafka.svc.cluster.local:27017. The full response is { "operationTime" : { "$timestamp" : { "t" : 1548767616, "i" : 1 } }, "ok" : 0.0, "errmsg" : "Authentication failed.", "code" : 18, "codeName" : "AuthenticationFailed", "$clusterTime" : { "clusterTime" : { "$timestamp" : { "t" : 1548767616, "i" : 1 } }, "signature" : { "hash" : { "$binary" : "M7qA9dMzPj1sC8lfT681vT57oPw=", "$type" : "00" }, "keyId" : { "$numberLong" : "6651444731228192769" } } } }}},

db.createUser({user:"springuser",pwd:"password",roles:[{role:"readWrite",db:"springdatabase"}]})