CODEWITHSUNDEEP
rabbitmqmqttmosquittobridgebroker
Dennis
Dennis

Reputation: 3678

How to conditionally forward messages between two bridged MQTT broker?

I have a MQTT Broker (mosquitto) located at site A and another broker (mosquitto or RabbitMQ) at cloud. In order for data to be forwarded to cloud, I plan to bridged them and TLS-ed for data security.

  1. At site A, software are communicate internally through MQTT and I DO NOT wish sensitive data be send to the cloud. (e.g: topic with "user/password")

  2. Non-sensitive information such as "user/age", "user/gender" is send to cloud for statistical analysis.

How to configure broker at site A to bridged and conditionally only forward certain topic/message to the cloud broker (while maintaining internal messaging)?

Upvotes: 2

Views: 2817

Answers (1)

hardillb
hardillb

Reputation: 59816

There is no negative matching or programmatic matching in mosquitto so you have 2 options:

  1. Totally separate the topic tree for the sensitive data and use a wildcard bridge configuration to send all the non sensitive data to the remote broker

    • user/age
    • user/gender

    • security/password

      connection cloud
address cloud.broker.foo
topic user/# out

  2. Add individual topic bridge configurations for each topic you wish to bridge.

    connection cloud
address cloud.broker.foo
topic user/age out
topic user/gender out

Upvotes: 1

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