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Databases & Queues

MQTT Monitoring

MQTT monitoring verifies the broker accepts connections and completes the CONNECT/CONNACK exchange — the control plane of every device fleet and telemetry pipeline.

The broker behind your IoT fleet deserves a check too

What it checks

  • MQTT CONNECT/CONNACK handshake
  • Broker port reachability and latency
  • Acceptance failures under load

Set it up

  1. 1Add an MQTT monitor with host and port
  2. 2Cover internal brokers via the agent
  3. 3Alert the fleet or platform owner

FAQ

Does it subscribe to topics?

The check validates the protocol handshake — broker availability. Topic-level telemetry belongs to your devices' own reporting.

Related check types

PostgreSQL MonitoringThe database answering 'accepting connections' is not the same as healthyMySQL / MariaDB MonitoringConnection refused is how your app learns the DB is down — get there firstRedis MonitoringWhen the cache dies, the database takes the hit

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