free5gc/udm repository overview

⁠Free5GC Compose

This repository is a docker compose version of free5GC⁠ for stage 3. It's inspire by free5gc-docker-compose⁠ and also reference to docker-free5GC⁠.

You can setup your own config in config⁠ folder and docker-compose.yaml⁠

• Prerequisites⁠
  • GTP5G kernel module⁠
  • Docker⁠
• Start Free5gc⁠
• Troubleshooting⁠
• Integration with external eNB/UE simulators⁠
• Vagrant Box Option⁠
• NF dependencies and ports⁠
• Reference⁠

⁠Prerequisites

⁠GTP5G kernel module

Due to the UPF issue, the host must be using kernel 5.0.0-23-generic. And it should contain gtp5g kernel module.

On you host OS:

git clone https://github.com/PrinzOwO/gtp5g.git
cd gtp5g
make
sudo make install

⁠Docker

• Engine: to install docker on your favorite OS, you can follow instruction here: https://docs.docker.com/engine/install/⁠
• Compose: you also need to install docker compose as detailed here: https://docs.docker.com/compose/install/⁠

⁠Start Free5gc

Because we need to create tunnel interface, we need to use privileged container with root permission.

$ git clone https://github.com/free5gc/free5gc-compose.git
$ cd free5gc-compose
$ make base
$ docker-compose build
$ sudo docker-compose up # Recommend use with tmux to run in frontground
$ sudo docker-compose up -d # Run in backbround if needed

⁠Troubleshooting

Sometimes, you need to drop data from DB:

$ docker exec -it mongodb mongo
> use free5gc
> db.subscribers.drop()
> exit # (Or Ctrl-D)

You can see logs for each service using docker logs command. For example, to access the logs of the SMF you can use:

docker logs smf

Please refer to the wiki⁠ for more troubleshooting information.

⁠Integration with external eNB/UE simulators

The integration with the UERANSIM⁠ eNB/UE simulator is documented here⁠.

You can also refer to this issue⁠ to find out how you can configure the UPF to forward traffic between the UERANSIM⁠ to the DN (eg. internet) in a docker environment.

⁠Vagrant Box Option

You can setup a working environment without the fuss of updating your kernel version just by using a vagrant box. You can follow the instructions provided here: https://github.com/abousselmi/vagrant-free5gc⁠

⁠NF dependencies and ports

⁠Reference

• https://github.com/open5gs/nextepc/tree/master/docker⁠
• https://github.com/abousselmi/docker-free5gc⁠