Docker Engine v29 on Linux: Why data-root No Longer Prevents OS Disk Growth (and How to Fix It)

Would like to supplement in view of restoring the old behavior and keep all container storage on a mounted data disk:

sudo systemctl stop docker.socket docker containerd || true;

sudo mkdir -p /mnt/docker-data /mnt/containerd;

sudo rm -rf /var/lib/containerd;

sudo ln -s /mnt/containerd /var/lib/containerd;

echo '{"data-root": "/mnt/docker-data"}' | sudo tee /etc/docker/daemon.json;

sudo systemctl daemon-reload;

sudo systemctl start containerd docker

This can ensure Docker data > /mnt/docker-data and Containerd images/snapshots > /mnt/containerd