Hello @pierre-gilles,
On my rasp, to install mqtt, I just need to click on install in the mqtt configuration and it works
On my nas, after installing Gladys, checking that it was working well, I do the same action and I always have the message « An error occurred while saving the configuration. » whether the option « Use a broker in a Docker container. » is enabled or not.
But the fact that gladys cannot manage my docker alone, I find it logical, so I start a manual installation of mosquito
And I have an error « Request failed with status code 400 » that bothers me…
But by writing this post, I realize that my mapping is wrong, I correct it and Mosquitto is installed.
I still have my link between Gladys and mqqt.
By disabling the option « Use a broker in a Docker container », while Mosquitto is indeed in a docker but NOT the gladys docker, the connection chain is set up!
I have reparameterized node-red to land on the right mqqt, I have modified your examples « lamp, cpu and bitcoin » and EVERYTHING IS OK!
As feared, it came from my docker skills and perhaps the « Use a broker in a Docker container » parameter which can be misleading
Maybe it should be put « …in a local docker container »
So, everything is on the docker of my NAS, one for gladys, one for mqqt, one for node-red. I have gained a rasp in my installation.
Thank you again, your follow-up allowed me to review the configuration and find my mistake.
Have a good day