Dynamic security changes not persisted to disk across restarts

[yobyot]

No matter where I place the Dynamic Security JSON file nor how I change its ownership and permissions, Mosquitto 2.0.18 will not persist any settings across restarts. IOW, it simply does not write the changes to the JSON file.

Please see the annotated screenshots below which document this sequence:

1. Issue mosquitto_ctrl dynsec listClients (I'm using an options file for authentication). Confirm admin client exists.
2. Issue ...createClient... to create client "iotClient"
3. Confirm new client exists via mosquitto_ctrl.
4. Restart Mosquitto.
5. Issue ...listClients`. Client added above is not listed.

You can see in the VS code terminal that the user specified in mosquitto.conf owns the JSON file. I've also included a screenshot of the JSON file before step 4 above.

At this point, the client exists but has not been persisted to the JSON file.

I've also included a screenshot of the log file, which appears to show that the $CONTROL/dynamic-security/v1 topic is receving the requests from mostquitto_ctrl.

[mrchipset]

Hi, @yobyot. I have tried the 2.0.18 mosquitto compiled from source code. I haven't caught your problem.
It seems this problem is caused by the write permission on your dynamic-security.json. You can try to set the mosquitto runtime user to root evaluate this problem. Another possible way is to use chown mosquitto:mosquitto /etc/mosquitto/dynamic-security.json .
Hope that helps.

[yobyot]

Thanks, @mrchipset.