Hi all,

I am just not solid enough on Linux to know how to handle what I am seeing, so please forgive the somewhat noob question.  I appear to have a lot of space on all of my physical drives.  That said, my docker containers will no longer update because I get an error that my docker volume is full.  On my Dashboard I see a "Docker vdisk" that is red and at 98% capacity (see Pic1 attached), so that must be it.  It is 20GB in size, and 18.9GB appears allocated (See Pic2 attached) when I hover my mouse over it.  When I go into the unraid console and do a "df -T" I see that the "/dev/loop2" device is 98% full, so that's also it (See Pic3 attached) and that it is mounted to /var/lib/docker.  My question is, what is this device, and how do I access it to either increase its size with gparted, or clean it up and delete stuff from it so I can continue to update my containers?  Thanks so much for considering.

First thing you want to do is go to Docker and then hit Container Size.  It likely won't add up to the right amount, but you'll probably see a container that is significantly larger than others.

 

This is usually caused by misconfiguration of the settings within the container.  IE: You've inadvertently set a downloader to download the files directly into the container instead of outside of it with the result of your image file filling up.

 

For what it's worth, to expand the size of the image, in Settings, Docker disable the service then enter in a higher value for the image size and re-enable.  It will automatically expand the vdisk to match

@Squid - thanks so much for the help.  I was able to easily expand the vdisk, and was then able to update all of my docker containers, so, problem solved for now.  That said, I didn't see anything that stood out as a container significantly larger than the others, though 8 of my containers are over 1GB in size, while the remainder are under 500MB.  Does anything in the attached look off to you, or do I just have quite a few containers, and just needed a bigger vdisk to accommodate, so I am now ok?  Thanks again.