Enable ipv6 for azure-iot-edge user-defined network

[AlesterRune]

We have a Raspberry Pi that we use as an edge device. One of our modules needs to communicate over IPv6 in the local network. Since the module is automatically connected to the "azure-iot-edge" network in Docker, I'd like a method to easily enable IPv6 on this network.

To achieve this, I tried following the steps described in the IPv6Configuration documentation. For me, this worked only for the default bridge network but not for the "azure-iot-edge" network. I also checked the networking documentation and attempted to configure the network using the mentioned /etc/aziot/edged/config.yaml file. However, this file did not exist initially, and when I manually added it, it seemed to be completely ignored.

The only way I have been able to get IPv6 to work for the "azure-iot-edge" network so far is by completely removing it and manually recreating it with IPv6 enabled. This also required me to manually disconnect and later reconnect all modules. This does not feel like the correct way to achieve this. I would assume there should be a way to configure this either from the module definition in the IoT Hub or by adding some configuration on the device.

[bilalsellak]

Can you please provide the following information:

Device Information
Host OS:
Architecture:
Container OS:
Runtime Versions
aziot-edged:
Edge Agent:
Edge Hub:
Docker/Moby:

[jlian]

@AlesterRune any updates?

[jlian]

@AlesterRune any updates?

[AlesterRune]

@bilalsellak @jlian

Can you please provide the following information:

We moved away from the Edge Module for this specific case about two months ago, as there were other issues when running the deployed application in a Docker container. Therefore, I'm not 100% sure what the specs were back then, but they should have been something along the lines of:

Host OS: Raspberry Pi OS (Build with pi-gen)
Architecture: arm64
Container OS: linux/arm/v7,linux/arm/v8

Runtime
(These are the Versions we're using currently on Ubuntu; they may have been different on the old OS)

aziot-edged: 1.5.16
Edge Agent: mcr.microsoft.com/azureiotedge-agent:1.5
Edge Hub: mcr.microsoft.com/azureiotedge-hub:1.5
Docker/Moby: 28.0.3-1

[kevin-vitro]

I was able to get this working with a very similar setup. Here is what I ended up doing:

in /etc/docker/daemon.json:

{
"ipv6": true,
*Whatever other info you have*
}

in /etc/aziot/config.toml inspired by this:

**Append to the bottom**

[moby_runtime]
uri = "unix:///var/run/docker.sock"

[moby_runtime.network]
name = "azure-iot-edge"
ipv6 = true

Once this was done:

1. Apply the configuration: sudo iotedge config apply
2. I stopped iotedge sudo iotedge system stop
3. Restart docker (to make sure the daemon.json update applies) sudo systemctl restart docker
4. I deleted the azure-iot-edge network from docker docker network rm azure-iotedge
5. restarted iotedge sudo iotedge system restart