Why Docker?

Docker allows you to deploy software in isolated containers, complete with all their dependencies. This means you don’t need to worry about library conflicts, system packages, or compiling from source—just pull the image and run.

The Docker images provided by jketterl on Docker Hub are built specifically for OpenWebRX and include all necessary requirements out of the box. Images are available for a range of hardware types, and there’s even a comprehensive “full” variant that supports multiple SDR devices.

These images are built for multiple architectures:

• x86_64 (most desktops/laptops)
• armv7l and aarch64 (perfect for Raspberry Pi and similar single-board computers)

Quick Start for Raspberry Pi

If you haven’t installed Docker yet, the easiest way is to run:

curl -sSL https://get.docker.com | sh

Once Docker is installed, you’re just two commands away from getting OpenWebRX up and running:

docker volume create openwebrx-settings
docker run --device /dev/bus/usb -p 8073:8073 \
  -v openwebrx-settings:/var/lib/openwebrx \
  --tmpfs=/tmp/openwebrx \
  jketterl/openwebrx:stable

This setup does the following:

• Maps USB access so your SDR hardware can be used inside the container
• Creates a persistent volume for OpenWebRX settings
• Offloads temporary files to memory (tmpfs) to reduce SD card wear, which is especially important on Raspberry Pi

Docker Compose Option

If you prefer docker-compose, here’s a minimal docker-compose.yml setup:

version: "3"
services:
  openwebrx:
    image: jketterl/openwebrx:stable
    volumes:
      - ./openwebrx/settings:/var/lib/openwebrx
    ports:
      - "8073:8073"
    devices:
      - "/dev/bus/usb/002/002:/dev/bus/usb/002/002"
    tmpfs:
      - "/tmp/openwebrx"

Make sure to adjust the USB device path according to your system. You can check your SDR device’s path using lsusb and ls /dev/bus/usb.

Troubleshooting: USB Device Access

Some users run into issues when the SDR device cannot be accessed inside the Docker container. This usually shows up as an error like:

usb_claim_interface error -6

This happens when the Linux kernel loads its own drivers for your SDR, preventing access from within Docker.

To solve this, you’ll need to blacklist the appropriate kernel modules on your host system. Here’s a quick reference:

On Debian-based systems:

Create a file in /etc/modprobe.d/, such as sdr-blacklist.conf, and add lines like:

blacklist dvb_usb_rtl28xxu

After that, run sudo update-initramfs -u and reboot your system to apply the changes.

Final Notes

This containerized approach to running OpenWebRX is efficient, maintainable, and easy to back up or migrate. It’s ideal for both newcomers and experienced users alike. The Docker images by jketterl are actively maintained and support a variety of SDR hardware, making them a solid choice for any SDR setup.

If you’re looking to get your SDR receiver online with minimal configuration and maximum flexibility, this is the way to go. Visit https://github.com/jketterl/openwebrx

The post OpenWebRX Using Docker on Raspberry Pi and Other Devices appeared on Hamradio.my - Amateur Radio, Tech Insights and Product Reviews by 9M2PJU.