Zwift

Hello fellow zwifters, here is a docker image for running zwift on linux. It uses the companion app by zwift for linking up smart trainers and other bluetooth/ant devices. The reason why I made this solution was so i could run multiple zwift instances on one machine at the same time.

The container comes pre-installed with zwift, so no setup is required, simply pull and run. It should also now support all manner of graphics cards that has gl rendering.

If you find this image useful, then feel free add me on zwift and give me a ride on from time to time.

Prerequisites

• Docker or Podman
• nvidia-container-toolkit if you have nvidia proprietary driver
• ATI, Intel and Nouveau drivers should work out of the box (not tested)

Install

sudo bash -c "$(curl -fsSL https://raw.githubusercontent.com/netbrain/zwift/master/bin/install.sh)"

This will put the zwift.sh script on your $PATH

RUN

After installation, simply run:

zwift

Configuration options

Key	Default	Description
USER	$USER	Used in creating the zwift volume zwift-$USER
IMAGE	docker.io/netbrain/zwift	The image to use
VERSION	latest	The image version/tag to use
DONT_PULL		If set, don't pull for new image version
CONTAINER_TOOL		Defaults to podman if installed, else docker

These environment variables can be used to alter the execution of the zwift bash script.

Examples:

DONT_PULL=1 zwift will prevent docker/podman pull before launch

CONTAINER_TOOL=docker zwift will launch zwift with docker even if podman is installed

USER=Fred zwift perfect if your neighbor fred want's to try zwift, and you don't want to mess up your zwift config.

How can I persist my login information so i don't need to login on every startup?

To authenticate through Zwift automatically, the credentials must be present in the zwift volume. docker volume ls or podman volume ls should have a zwift-$USER volume. A file named .zwift-credentials must contain the following lines:

ZWIFT_USERNAME=username
ZWIFT_PASSWORD=password

where username is your Zwift account email, and password your Zwift account password, respectively. Note that if your password contains special characters such as ; you will need to escape them using \.

copy this file into your zwift volume zwift-$USER:

# docker
docker run -v zwift-$USER:/data --name zwift-copy-op busybox true
docker cp .zwift-credentials zwift-copy-op:/data
docker rm zwift-copy-op

# podman
podman unshare
cp .zwift-credentials $(podman volume mount zwift-$USER)
exit

The credentials will be used to authenticate before launching the Zwift app, and the user should be logged in automatically in the game.

How do I connect my trainer, heart rate monitor, etc?

You can use your phone as a bridge.

For example, your Wahoo Kickr and Apple Watch conect to the Zwift Companion app on your iPhone; then the Companion app connects over wifi to your PC running Zwift.

How can I add custom .zwo files?

The folder's name that receives .zwo files is dynamic based on your user's numeric ID. This example works considering you have a single user in the same docker volume. After you've downloaded/created your .zwo files use the following script to copy it to the correct folder:

# docker
docker run -v zwift-$USER:/data --name zwift-copy-op busybox ls /data/Workouts | xargs -I {} docker cp my-workouts-file.zwo zwift-copy-op:/data/Workouts/{}
docker rm zwift-copy-op

#podman
@TBD

If you have multiple users at the same volume you might want to find out which IDs exist in your setup and map the ID for each user to copy correctly to the corresponding user. An example of this would be:

# docker
docker run -v zwift-$USER:/data --name zwift-copy-op busybox true
docker cp my-workouts-file.zwo zwift-copy-op:/data/Workouts/1234
docker rm zwift-copy-op

#podman
@TBD

How can I build the image myself?

docker build -t netbrain/zwift .
docker run --gpus all \
 --privileged \
 --name zwift \
 -e DISPLAY=$DISPLAY \
 -v /tmp/.X11-unix:/tmp/.X11-unix \
netbrain/zwift

After install and update is complete stop the container docker stop zwift and proceed with comitting a new version.

export VERSION=1.20.0                               # Or whatever the latest version is
docker commit zwift netbrain/zwift:$VERSION         # Create a new image with the latest update
docker rm zwift                                     # Remove the no longer needed container

How can I fetch the image from docker hub?

https://hub.docker.com/r/netbrain/zwift

docker pull netbrain/zwift:$VERSION # or simply latest

How can I update Zwift?

The zwift.sh script will update zwift by checking for new image versions on every launch, however if you are not using this then you will have to pull netbrain/zwift:latest from time to time in order to be on the latest version.

There is a github action in place that will update zwift on a scheduled basis and publish new versions to docker hub.

How can I modify the image to use with zoffline?

Run the zwift.sh script and open a bash in the running container

docker ps -a
docker exec -it <container-id> bash

In the container bash, run

wget https://raw.githubusercontent.com/zoffline/zwift-offline/master/ssl/cert-zwift-com.pem
cat cert-zwift-com.pem >> .wine/drive_c/Program\ Files\ \(x86\)/Zwift/data/cacert.pem
openssl x509 -in cert-zwift-com.pem -inform PEM -out cert-zwift-com.crt
sudo mkdir /usr/local/share/ca-certificates/extra
sudo mv cert-zwift-com.crt /usr/local/share/ca-certificates/extra
sudo update-ca-certificates
exit

Commit the changes to a new image

docker commit <container-id> zoffline-client

Edit ZOFFLINE_IP in the zoffline.sh script (if server is not running on the same machine) and run it to launch Zwift.

Contibute

If you would like to contribute, then please by all means I'll accept PR's. A good starting point would be to see if there's any open issues that you feel capable of doing. Let me know if I can help with anything.

Alternative's to this repository

• Install zwift using wine directly or a framework like lutris. You will however have to manage installation and updates yourself
• Use scrcpy to mirror android device to your linux screen
  • Enable developer options on your android device
  • Pair your computer to the device using adb pair documentation
    • ./srccpy.sh adb pair ip:port see my container solution
  • Mirror the android device screen onto your linux screen using scrcpy.
    • ./srccpy.sh scrcpy --tcpip=ip:port
  • If you require sound aswell, there's also a sndcpy project (doesn't support wireless though, but the abovementioned can be modified to use usb)
• Using redroid to install zwift apk onto a android emulator (not tested)
• Using a virual machine with pci passthrough
  • https://looking-glass.io/
  • https://wiki.archlinux.org/title/PCI_passthrough_via_OVMF
  • https://github.com/VGPU-Community-Drivers/vGPU-Unlock-patcher (if you have a nvidia card you can eat your cake, and have it too by creating vgpus for vm's that leverage the host gpu, no dedicated gpu required)