Hello, since a few days I test NR Docker.
I use Portainer.io to manage my containers. It's quite simple.
Now I want to be able to use the serialport node to read what is on the USB port (RFlink card) of my OrangePi.
So I found the place where to bring up the ttyUSB0 port in the container, but there is still a problem of access rights. I don't know how and where to add the node-red user to the diaolout group or maybe launch the container as root?
Would you have any suggestions, solutions to help me.
I read in the documentation that you have to launch the container with the addition of the user to the dialout group,
but I can't find the way to make it work under portainer.io
Syntax error ?
Sorry, I don't know, because everything is hidden by the portainer.io GUI.
Here is the container log, it seems that the additional command is taken into account, at least I have the impression.
I tried to change the User by root, so I lost my flow but still the access problem.
you can always start (run) the container from outside portainer - and then manage it from there (and then maybe see where is sets/saves that extra option)
yes indeed, I will try to understand the dockerfile commands and run it by hand.
I may ask the question in the portainer forum.
I looked in the directory used by portainer, it seems that it uses its DB to store its configuration, no traces of a readable file
Did you use this tool or do you pass the commands by hand?
The command field allows you to specify the docker CMD for your container.
What you need is a way to specify docker run options (more particularly the --group-add option).
I understand that you have created your container by adding the container via portainer.
I did have a quick look and I don't think it is possible to specify docker run options via portainer.
You can of course create an image from a simple container that is adding the dialout group for node-red user (see my earlier post) and select this image in portainer when adding a new container.
What you mention there is the possibility to use a docker-compose file, but I don't think you can add a group to node-red via a docker-compose file.
You need to create a simple image that sets the permission.
So you need to create a Dockerfile with following contents on the host machine where portainer is running.
FROM nodered/node-red
USER root
RUN addgroup node-red dialout
USER node-red
You can a build an docker image based on the above Dockerfile using below command (should be run in the same folder where you have created the above Dockerfile)
[root@nuc-jan test]# docker build -t node-red-with-dialout-permissions .
Sending build context to Docker daemon 2.048kB
Step 1/4 : FROM nodered/node-red:1.2.9-12
---> 9772fc53c59f
Step 2/4 : USER root
---> Using cache
---> f51e7cd902b0
Step 3/4 : RUN addgroup node-red dialout
---> Running in 15b6a066db67
Removing intermediate container 15b6a066db67
---> dfcc57c65d21
Step 4/4 : USER node-red
---> Running in 407d4e0100a9
Removing intermediate container 407d4e0100a9
---> 0e44d20e1653
Successfully built 0e44d20e1653
Successfully tagged node-red-with-dialout-permissions:latest
[root@nuc-jan test]#
Now you can deploy a container using image node-red-with-dialout-permissions:latest in portainer as you used to do.
I have tested this and it works for me as you can see in screenshot below:
It does indeed work. Great
You have to do things on the command line. as often
I'm going to get an arduino to connect to the USB and see if there is a real dialog that goes back to NR.
I'll give you a feedback as soon as I've done the manipulation.
So, if I understand correctly, I can create an image with the nodes I need in my flows in the same way.
One question, what about the configuration-flows-credentials files.
Will they be included in the image or will they be left separately ?
The ones in my case /data that physically point to /var/lib/docker/volumes/node_red_user_data/_data ?
