Issues testing dockerfile

[stevenveenma]

I tested this dockerfile approach today. I succeeded in spinning up a docker container and running a Python script. The script receives MQTT messages processed them and than writes these to influxdb. I have some issues and observations:

• Using a local version of python I can use localhost to write influxdb. But using the dockerfile writing to influxdb failed. I tried different options: 'localhost', 'influxdb' and '172.18.0.3' but no results.
• I succeeded in installing several dependencies, but Pandas could not be installed. I will dive in this myself.
• The name of the container in portainer is weird. The names are fantasy-like and don't have a relation with the name of the dockerfile. First I thought I was hacked but then I realize its the dockerfile.
• I have several python files all with the same dependencies. With this approach I install the dependencies (libraries) multiple times. Isn't is possible to make a container for all files and run the whole set at once?

[gcgarner]

Hi Steve

FYI i've added a python container to the IOTstack project.

1. you can try adding --network="host" to the first docker run, this will allow you to use "localhost" to resolve the ports (like localhost:1883 for mqtt) .
2. I also could not install pandas, I suspect python doesnt have buildutils or a related package that is stopping it.
3. you need to specify a name docker run --name MyPython to give it a name
4. if you have several different containers that you want to run from the same base then you only need to build one with all the requirements, then specify a new container name for each container

[stevenveenma]

Thanks for your quick reply! I tried suggestion 1. The first docker run syntax is:
docker run -it --rm --name mypython cv --network="host"
Unfortunately this gives an error:
docker: Error response from daemon: OCI runtime create failed: container_linux.go:346: starting container process caused "exec: \"--network=host\": executable file not found in $PATH": unknown.