系统是 Ubuntu 18.04。Docker
版本：19.03.8
尝试按照说明在无根模式下运行 docker 后这里我无法做到这一点，运行命令后遇到错误dockerd-rootless.sh --experimental：
INFO[2020-04-25T15:35:33.721952447+02:00] Starting up
WARN[2020-04-25T15:35:33.722001718+02:00] Running experimental build
WARN[2020-04-25T15:35:33.722008008+02:00] Running in rootless mode. Cgroups, AppArmor, and CRIU are disabled.
INFO[2020-04-25T15:35:33.722012842+02:00] Running with RootlessKit integration
INFO[2020-04-25T15:35:33.722794485+02:00] libcontainerd: containerd is still running pid=6091
INFO[2020-04-25T15:35:33.722825212+02:00] parsed scheme: "unix" module=grpc
INFO[2020-04-25T15:35:33.722887823+02:00] scheme "unix" not registered, fallback to default scheme module=grpc
INFO[2020-04-25T15:35:33.722902875+02:00] ccResolverWrapper: sending update to cc: {[{unix:///run/user/1000/docker/containerd/containerd.sock 0 <nil>}] <nil>} module=grpc
INFO[2020-04-25T15:35:33.722917631+02:00] ClientConn switching balancer to "pick_first" module=grpc
failed to start containerd: timeout waiting for containerd to start
[rootlesskit:child ] error: command [/home/vasko/bin/dockerd-rootless.sh --experimental] exited: exit status 1
[rootlesskit:parent] error: child exited: exit status 1