ICOtronic CAN Test Container

Description

Script and Dockerfile to test basic CAN communication with the ICOtronic system

Note: the Docker container requires a Linux host, since we need a way to “connect” the CAN adapter to the Docker container.

Requirements

• Hardware:
  • Peak CAN adapter
  • Power Injector
  • Stationary Transceiver Unit (STU)
• Software:
  • Docker (Linux host)

Docker

Build

Please run the following command in the root of the repository:

docker build -t icocantest .

Run

Below we will describe two different options to “connect” the CAN adapter to the running container:

1. Using host networking
2. Using network namespaces

Host Networking

1. Run Docker container:

   docker run --rm --network host -it --name icocantest icocantest

2. Run script inside Docker container:

   python cantest/test.py

Network Namespaces

1. Run Docker container:

   docker run -itd --rm --name icocantest icocantest

2. Map CAN adapter into Docker container

   export DOCKERPID="$(docker inspect -f '{{ .State.Pid }}' icocantest)"
   sudo ip link set can0 netns "$DOCKERPID"
   sudo nsenter -t "$DOCKERPID" -n ip link set can0 type can bitrate 1000000
   sudo nsenter -t "$DOCKERPID" -n ip link set can0 up

3. Execute script:

   docker exec icocantest python cantest/test.py

4. Cleanup:

   docker stop icocantest