This release concludes the changes made in the area of collecting and reporting metrics that have been started in 0.8. In particular,
- the meter types, names and tags used by Hono for reporting status information have been revised and adapted to provide more relevant information for monitoring a Hono installation.
- Hono's protocol adapters and services by default expose an HTTP endpoint that can be used by a Prometheus back end to scrape metrics.
- the Graphite based legacy metrics format is still supported but users are encouraged to use the Prometheus back end instead.
The MQTT protocol adapter now supports
- publishing of command messages to devices using QoS 1 which allows back end applications that send commands to an MQTT device to be notified of a successful attempt to deliver a command to a device.
- authentication of devices using X.509 client certificates. The client certificates are validated using a trust anchor that can be configured at the tenant level.
Release Date
Release Type
Minor release
New & Noteworthy URL
| Name | Date | Description |
|---|---|---|
| M1 | 2018/12/21 | Java 11, use Prometheus instead of InfluxDB as default metrics back end, lots of bugfixes, support on-the-fly hashing of clear text passwords during registration |
| M2 | 2019/01/23 | support X.509 client certificate based authentication of MQTT devices, extend tracing to Device Registry |
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