Error while starting mosquitto broker with protocol websockets (docker-container)

[MerzMax]

I use the mosquitto docker container version 2.0.12.

I can't start the broker with the option "protocol websockets" anymore. This is the output of my container:

mqtt_broker_1  | 1631261934: Error: Invalid protocol value (websockets
mqtt_broker_1  | 1631261934: Error found at /mosquitto/config/mosquitto.conf:2.
mqtt_broker_1 exited with code 0

My mosquitto.conf:

listener 9001
protocol websockets

allow_anonymous true
log_type all

[T81]

Same issue here

[ralight]

I've just tested this out as below, and it worked fine. Can you give any hints as to what is different in your situation? Or try it exactly as I did?

[MerzMax]

@ralight If i ececute the the same command, I get the following output:

$ more Mosquitto/mosquitto.conf 
listener 9001
protocol websockets

allow_anonymous true
log_type all
$ docker run -it -p 9001:9001 -v ${PWD}/Mosquitto:/mosquitto/config eclipse-mosquitto:2.0.12
Unable to find image 'eclipse-mosquitto:2.0.12' locally
2.0.12: Pulling from library/eclipse-mosquitto
a0d0a0d46f8b: Pull complete
0923389132a8: Pull complete
Digest: sha256:ce08d3fe69d4170cea2426739af86ac95e683f01dd2c4141da661983a2401364
Status: Downloaded newer image for eclipse-mosquitto:2.0.12
).32308106: Error: Invalid protocol value (websockets
1632308106: Error found at /mosquitto/config/mosquitto.conf:2.

[ralight]

@MerzMax Hmm, very interesting. What platform are you running Docker on?

[MerzMax]

@ralight Windows with wsl 2.

[ralight]

Thanks, I'll get myself set up with Docker on WSL 2 and give it a try, it might not be straight away.

[ralight]

This looks to be a duplicate of #2297, I'm going to close this and track it there if that's ok.