| Hi Giles,
changing the ownership of the folder /mosquitto (and recursively all sub folders) inside the container to mosquitto:mosquitto is part of the docker-entrypoint.sh script starting the broker in the container. The intention is to avoid any kind of permission/owership problems.
But the ownership of your file inside the container still looks strange. Could you please try to change permission of the password file to 666 using: sudo chmod 666 /volume1/mosquitto/data/mosquitto.password_file (You may need to execute it with root permission as the folder/file might belong to a userid, which does not exist on the host).
Then give it a new try. This would help to see, if we have a permission problem with the file.
If this does not help please try to view the content (e.g. cat) of the file inside the container using the mosquitto user: su mosquitto less /mosquitto/data/mosquitto.password_file (Use q to quit the less).
Best, Norbert
Many thanks for that explanation. I hadn't realised that a docker image expects certain volumes, I thought you could replace any path with any path.
Anyway, I am now running with:
sudo docker run --rm -i -p 1883:1883 -v /volume1/mosquitto/config:/mosquitto/config -v /volume1/mosquitto/data:/mosquitto/data --name mosqTemp eclipse-mosquitto:latest
but unfortunately I still get:
1646993206: mosquitto version 2.0.14 starting
1646993206: Config loaded from /mosquitto/config/mosquitto.conf.
1646993206: Error: Unable to open pwfile "/mosquitto/data/mosquitto.password_file".
1646993206: Error opening password file "/mosquitto/data/mosquitto.password_file".
in the container I can now see the expected file:
/mosquitto/data # pwd
/mosquitto/data
/mosquitto/data # ls -la
total 4
d--------- 1 mosquitt mosquitt 46 Mar 11 05:52 .
drwxr-xr-x 1 mosquitt mosquitt 26 Nov 17 01:20 ..
---------- 1 mosquitt mosquitt 121 Mar 11 05:52 mosquitto.password_file
Hi Giles,
the mosquitto Docker container is expecting two different volumes to be mounted in the container (as you might be able to check using the "docker image inspect mosquitto:latest“ and check for Volumes) 1. /mosquitto/config 2. /mosquitto/data
If you simply try to mount your local /volume1/mosquitto to the internal /mosquitto still the subfolders config and data will not be visible in the container (as they are overloaded by the docker engine). This is a general pattern in docker engine: All specified volumes have to be mounted individually. You can’t simply mount the folder above.
To fix your problem you would need to mount your local data and config individually into the container: sudo docker run --rm -i -p 1883:1883 -v /volume1/mosquitto/config:/mosquitto/config -v /volume1/mosquitto/data:/mosquitto/data eclipse-mosquitto:latest
Hope this helps.
BTW: Why are there two different folder ? Because the folder contain two different types of data. Config contains seldom modified data, which contains highly sensitive data like usernames and password (hashes). The data folder store temporary data and maybe modified very often. Using two different folders allows to use different backend storages (e.g. different RAID configs).
Best, Norbert
Hi All
I am trying to get mosquitto docker to work with a password file. my run command:
sudo docker run --rm -i -p 1883:1883 -v/volume1/mosquitto:/mosquitto eclipse-mosquitto:latest
my config (/volume1/mosquitto/config/mosquitto.conf):
listener 1883
password_file /mosquitto/data/mosquitto.password_file
container file structure:
volume1/ /config /mosquitto.conf /data /mosquitto.password_file /mqtt_passwd (there are 2 copies of password at 2 different locations)
Within the running container I can see the mqtt_passwd in /mosquitto/ but the mosquitto.password_file is missing from /mosquitto/data - I have no idea how that can happen.
If I change my config to point to the password file at /mosquitto/mqtt_passwd I get the same error:
1646978185: mosquitto version 2.0.14 starting
1646978185: Config loaded from /mosquitto/config/mosquitto.conf.
1646978185: Error: Unable to open pwfile "/mosquitto/mqtt_password".
1646978185: Error opening password file "/mosquitto/mqtt_password".
I am very new to docker and pretty new to linux so I am a bit lost. Any help much appreciated.
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-- Senior Developer | Cedalo GmbH
Tel: +49 173 936 43 63
Cedalo GmbH The company behind Eclipse Mosquitto and Eclipse Streamsheets Geschäftsführer: Philipp Struss, Philip Ackermann, Dr. Stefan Lölkes
Registergericht: Amtsgericht Freiburg, HRB 725414
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-- Senior Developer | Cedalo GmbH
Tel: +49 173 936 43 63
Cedalo GmbH The company behind Eclipse Mosquitto and Eclipse Streamsheets Geschäftsführer: Philipp Struss, Philip Ackermann, Dr. Stefan Lölkes Registergericht: Amtsgericht Freiburg, HRB 725414
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