After dietpi update docker is not starting

[nofax]

Creating a bug report/issue

x I have searched the existing open and closed issues

Required Information

• DietPi version |
  G_DIETPI_VERSION_CORE=9
  G_DIETPI_VERSION_SUB=16
  G_DIETPI_VERSION_RC=3
  G_GITBRANCH=‘master’
  G_GITOWNER=‘MichaIng’
  G_LIVE_PATCH_STATUS[0]=‘applied’
• Distro version | bookworm 0
• Kernel version | Linux sdcon2 6.12.34+rpt-rpi-v8 #1 SMP PREEMPT Debian 1:6.12.34-1+rpt1~bookworm (2025-06-26) aarch64 GNU/Linux
• Architecture | arm64
• SBC model | RPi 4 Model B (aarch64)
• Power supply used | Raspberry standard power supply

Additional Information (if applicable)

Docker Engine - Community
Version: 28.3.3

/etc/docker/daemon.json
{
“data-root”: “/mnt/dietpi_userdata/docker-data”,
“log-driver”: “journald”,
“log-level”: “warn”,
“debug”: false
}

Actual behaviour

Hi all,

after todays DietPi update Docker is not starting.
I found a similar error description here: 15826
Unfortunately, I have not yet been able to find a solution to my problem.
Hope someone can help.

Extra details

Error Log:
Aug 25 19:30:21 sdcon2 systemd[1]: docker.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
Aug 25 19:30:21 sdcon2 systemd[1]: docker.service: Failed with result ‘exit-code’.

[Joulinar]

share the service log

journalctl -u docker -u containerd

[nofax]

@Joulinar

journalctl -u docker -u containerd

service_log-2025-08-25.txt (1,0 MB)

[Joulinar]

can you try to start docker manually in debug mod? Maybe this is giving some more information

dockerd --debug

[nofax]

funny and magic… - today I’ve rebooted the machine as the days before and docker is starting.

root@sdcon2:~# docker info
Client: Docker Engine - Community
Version: 28.3.3
Context: default
Debug Mode: false

Server:
Containers: 2
Running: 1
Paused: 0
Stopped: 1
Images: 2
Server Version: 28.3.3
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Using metacopy: false
Native Overlay Diff: true
userxattr: false
Logging Driver: journald
Cgroup Driver: systemd
Cgroup Version: 2
…
Hope it will continue.

THX Joulinar for your support

[nofax]

… dockerd --debug
is saying:
root@sdcon2:~# dockerd --debug
unable to configure the Docker daemon with file /etc/docker/daemon.json: the following directives are specified both as a flag and in the configuration file: debug: (from flag: true, from file: false)