Cloudron dashboard not responding - box and cloudron-firewall failing

[flexplore]

Hi,

I’m running Cloudron on a VPS and I can no longer access the Cloudron dashboard.

The dashboard shows:
“This app is currently not responding. Please try refreshing the page in a few minutes.”

From the server terminal, it looks like there may be an issue with the firewall/kernel configuration. The services box and cloudron-firewall do not seem to start correctly.

What I already tried:

• Full server reboot
• Manual restart of Cloudron services from terminal
• Generated a Cloudron support login with cloudron-support --owner-login

Important constraint:
Reinstalling the server is not an option because I need to keep the existing data and apps.

Goal:
I need help diagnosing the firewall/kernel issue and restoring access to the Cloudron dashboard without data loss.

Could someone tell me which logs or commands I should check next?

Thanks.

[james]

Hello @flexplore
Please post the output of cloudron-support --troubleshoot and make sure you are not affected by https://forum.cloudron.io/topic/15442/ubuntu-24.04-kernel-6.8.0-110-regression-affecting-cloudron

[flexplore]

Hi James,

Here is the output of cloudron-support --troubleshoot:

Vendor: QEMU Product: Standard PC
Linux: 6.8.0-111-generic
Ubuntu: noble 24.04
Cloudron: 9.1.7
Execution environment: kvm

[OK] node version is correct
[OK] IPv6 is enabled and public IPv6 address is working

Docker is down. Trying to restart docker...

Job for docker.service failed because the control process exited with error code.
See "systemctl status docker.service" and "journalctl -xeu docker.service" for details.

So Cloudron is already on 9.1.7, but Docker cannot start.

What should I check next to safely restore Docker/Cloudron without data loss?

[james]

Hello @flexplore
Can you please post the output of systemctl status docker.service and journalctl -xeu docker.service so I can take a look at the log to understand why the docker.service is not starting correctly?

[flexplore]

Hi James,

Here are all the details I have so far.

Cloudron environment:

Vendor: QEMU Product: Standard PC
Linux: 6.8.0-111-generic
Ubuntu: noble 24.04
Cloudron: 9.1.7
Execution environment: kvm
Processor: AMD EPYC 9354P 32-Core Processor
BIOS: pc-i440fx-11.0
RAM: 8131480KB
Disk: /dev/sda1 53G

Output of cloudron-support --troubleshoot:

[OK] node version is correct
[OK] IPv6 is enabled and public IPv6 address is working

Docker is down. Trying to restart docker...

Job for docker.service failed because the control process exited with error code.
See "systemctl status docker.service" and "journalctl -xeu docker.service" for details.

Output of systemctl status docker.service:

docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; preset: enabled)
Drop-In: /etc/systemd/system/docker.service.d/cloudron.conf
Active: failed (Result: exit-code) since Wed 2026-05-20 06:24:24 UTC; 3 days ago
TriggeredBy: docker.socket
Main PID: 1480807 (code=exited, status=1/FAILURE)

docker.service: Scheduled restart job, restart counter is at 3.
docker.service: Start request repeated too quickly.
docker.service: Failed with result 'exit-code'.
Failed to start docker.service - Docker Application Container Engine.

Output of journalctl -xeu docker.service:

dockerd[1480807]: 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: log-driver: (from flag: journald, from file: json-file)

docker.service: Main process exited, code=exited, status=1/FAILURE
docker.service: Failed with result 'exit-code'.
Failed to start docker.service - Docker Application Container Engine.
docker.service: Start request repeated too quickly.

So Docker cannot start because log-driver seems to be defined twice:

• as a systemd flag: journald
• in /etc/docker/daemon.json: json-file

Cloudron is already on 9.1.7, but Docker is down.

What is the safest Cloudron-compatible fix here without data loss?
Should I remove the log-driver entry from /etc/docker/daemon.json, or should the Cloudron systemd override be changed?

Thanks.