Rootless Docker Setup on Ubuntu 22.04: Failed to Start Application Container Engine
In this article, we will provide a detailed guide on how to set up Rootless Docker on Ubuntu 22.04, including troubleshooting steps for the error message "Failed to start Application Container Engine" during the setup process.
Prerequisites
- Operating System: Ubuntu 22.04
- Docker: 25.0.1
Setup Rootless Docker
To set up Rootless Docker on Ubuntu 22.04, follow the instructions provided in the official Docker documentation:
- Create a new user group for Rootless Docker:
sudo groupadd docker- Add the current user to the new group:
sudo usermod -aG docker $USER- Log out and log back in for the group change to take effect.
- Install the required dependencies:
sudo apt-get update && sudo apt-get install -y libseccomp2 libapparmor1- Clone the Rootless Docker repository:
git clone https://github.com/docker/docker-rootless.git- Navigate to the cloned repository:
cd docker-rootless- Run the setup script:
sudo ./scripts/install.shTroubleshooting
If you encounter the error message "Failed to start Application Container Engine" during the setup process, follow these troubleshooting steps:
- Check that the required dependencies are installed:
sudo apt-get update && sudo apt-get install -y libseccomp2 libapparmor1- Check that the Docker daemon is running:
sudo systemctl --user status docker- Check that the Docker daemon is configured to start automatically:
sudo systemctl --user is-enabled docker- Check that the current user is a member of the Docker group:
id -nG $USER- Check that the Rootless Docker daemon is running:
ps -ef | grep dockerd-rootlessRootless Docker provides a secure and isolated environment for running Docker containers without requiring root access. By following the steps outlined in this article, you should be able to set up Rootless Docker on Ubuntu 22.04 and troubleshoot any errors that may arise during the setup process.
References
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