Can't start docker on raspberry pi2B

This is the result :

root@DietPi:~# systemctl status docker -l
● docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; disabled; vendor preset:
enabled)
Drop-In: /lib/systemd/system/docker.service.d
└─dietpi-simple.conf
Active: failed (Result: exit-code) since Fri 2019-09-13 16:18:30 B
ST; 5s ago
Docs: https://docs.docker.com
Process: 1101 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd
/containerd.sock (code=exited, status=1/FAILURE)
Main PID: 1101 (code=exited, status=1/FAILURE)
CPU: 1.330s

Sep 13 16:18:28 DietPi systemd[1]: docker.service: Failed with result ‘e
xit-code’.
Sep 13 16:18:30 DietPi systemd[1]: docker.service: Service hold-off time over, s
cheduling restart.
Sep 13 16:18:30 DietPi systemd[1]: Stopped Docker Application Container Engine.
Sep 13 16:18:30 DietPi systemd[1]: docker.service: Start request repeate
d too quickly.
Sep 13 16:18:30 DietPi systemd[1]: Failed to start Docker Application Co
ntainer Engine.
Sep 13 16:18:30 DietPi systemd[1]: docker.service: Unit entered failed s
–More–
tate.e–
Sep 13 16:18:30 DietPi systemd[1]: docker.service: Failed with result ‘e
xit-code’.
Warning: docker.service changed on disk. Run 'systemctl daemon-reload
’ to reload units.
root@DietPi:~#

'systemctl daemon-reload does not help