Not able to login to WEB GUI since restored OMV via FSARCHIVER

Hello,

Today I have restored my OMV with fsarchiver with this instruction:

Thread

[How-To] Restore OMV system backup made with openmediavault-backup plugin

INTRODUCTION

If you use the Backup plugin (openmediavault-backup) you might have asked: if something goes wrong, how should I restore it?
After all, backup is useless if you don’t know what to do with it, so let’s sort it out!

The Backup plugin offers many backup options, but in this guide, I will be considering fsarchiver, because it’s the one I use and the most convenient: does not waste space and it’s faster than dd (just my 2 cents here, dd team don’t yell at me!). Well, actually the best…

auanasgheps

Jul 3rd 2022

Everything worked fine but since them I am not able to login to the web GUI.

I see the login screen but after I entered the credentials I am recieving the following error (see screenshot):

500 - Internal Server Error

Failed to connect to socket: Permssion denied

Did anyone has an idea how to fix the issue?

Thanks in advanced.

Quote from raulfg3

yes, use omv-firstaid and select apropiate option.

I already tried omv-firstaid and changed the workbench administrator Password & reset failed login attempt counter but it still dont work.

Quote from raulfg3

do you try to clear cache?

I used the command apt-get clean and point 9 (Clear local upload package respository) in omv-firstaid and it still dont work. I have the feeling that something is wrong with the permissions or that the system partition only has read access.

Quote from raulfg3

no, no, clear browser cache eg: crtl+shift +R , or other for your browser.

I also did this and tested it with other browsers and devices but still the same issue.

Quote from chente

Did you check if rootfs is full?

Thread

[How-To] Fix full OS filesystem - GUI login loop

Symptoms

When you try to login to the GUI of OMV you are not being logged in, but the login page shows up again

Check, if a full root filesystem is the problem
ssh into your server (check the new user guide on how to ssh into your server) and run following command
df df will show you the usage of each filesystem
the output of df will look like this:
(Code, 19 lines)

The filesystem dev/sda1 which is mounted on "/" is the OS filesystem. The use of that filesystem is 100% --> the OS filesystem is full.

…

macom

Jul 23rd 2020

I dont see that the rootfs is full (sda2) but loop0 and loop1. to be honest I dont know which filesystems these are

Quote from chente

Did you restore from an Ubuntu system? I ask because inside those two loop devices there is something related to snap.

No I used the OMV Image, based on Debian I think.

Now I have tried to mount the loop devices but I cant create a folder in the mnt folder because the file system is read-only (/mnt). Maybe this is the reason why I cant login to the web UI.

Quote from chente

What I mean is that to restore with fsarchiver you had to do several operations from a PC. Did this PC have Ubuntu installed? Is it possible that Ubuntu has added something unwanted?

I used SystemRescue that I have installed on a bootable USB-Stick to do all the operations.

Quote from raulfg3

try to remount mount -o remount, rw

Then I get the message:

mount: rw: mount point does not exist.

Quote from chente

Sorry, I have no idea why those two loop devices appeared. You will have to wait for help from someone else.

I was able to remove loop0 and loop1. In the past I used snap for 2 applications and these devices remains from there I think.