Solved Cannot update due to one tiny app filling up 20GB drive

[jdaviescoates]

I can't update one of my Cloudrons to 7.3.5, I'm guessing because it doesn't have enough spare disk space.

But I don't understand why so much disk space is being taken up? I've literally only got Uptime Kuma installed, but it's taking up nearly all the space on my drive?

That can't be right, surely?

[jdaviescoates]

Seems to all be this overlay stuff?

[jdaviescoates]

Does Cloudron really need more than 20GB disk space just to run one tiny app?

[BrutalBirdie]

@jdaviescoates can you please share the output of

docker images

?

[nebulon]

So the minimum disk size for Cloudron is actually 20Gb. The platform comes with various things to cater to more apps. For a single app installed, this may be overhead, but its not really targetted to run only one app.

[jdaviescoates]

@nebulon said in Cannot update due to one tiny app filling up 20GB drive:

So the minimum disk size for Cloudron is actually 20Gb.

Well, it seems maybe 20GB isn't actually enough as updates don't seem to work when you only have 20GB

[jdaviescoates]

@BrutalBirdie said in Cannot update due to one tiny app filling up 20GB drive:

@jdaviescoates can you please share the output of

docker images

?

# docker images
REPOSITORY                                 TAG                         IMAGE ID       CREATED         SIZE
cloudron/louislam.uptimekuma.app           20230119-084851-244567a80   b19e8e86a8f4   9 days ago      3.54GB
registry-1.docker.io/cloudron/mail         3.7.4                       8889742c287e   2 months ago    3.09GB
cloudron/mail                              <none>                      8889742c287e   2 months ago    3.09GB
registry-1.docker.io/cloudron/postgresql   4.3.5                       71cd99ca14d2   2 months ago    2.57GB
registry-1.docker.io/cloudron/redis        3.3.1                       96a9f9f44027   3 months ago    2.24GB
registry-1.docker.io/cloudron/mongodb      4.2.2                       cebe87db8404   3 months ago    2.39GB
registry-1.docker.io/cloudron/mysql        3.2.2                       7b470da9b31f   3 months ago    2.57GB
registry-1.docker.io/cloudron/postgresql   4.3.4                       cded91e9730b   3 months ago    2.57GB
registry-1.docker.io/cloudron/graphite     3.2.0                       37d3f884026e   3 months ago    2.3GB
registry-1.docker.io/cloudron/mail         3.7.0                       44d872dafe25   3 months ago    2.98GB
cloudron/sftp                              3.6.1                       2ab2a10df10d   9 months ago    2.25GB
registry-1.docker.io/cloudron/sftp         3.6.1                       2ab2a10df10d   9 months ago    2.25GB
cloudron/turn                              1.4.0                       25ca2ae58229   13 months ago   2.24GB
registry-1.docker.io/cloudron/turn         1.4.0                       25ca2ae58229   13 months ago   2.24GB
cloudron/graphite                          3.1.0                       2b37cdb8a666   13 months ago   2.3GB
registry-1.docker.io/cloudron/graphite     3.1.0                       2b37cdb8a666   13 months ago   2.3GB
cloudron/base                              3.2.0                       0fe0cc664045   13 months ago   2.23GB
registry-1.docker.io/cloudron/base         3.2.0                       0fe0cc664045   13 months ago   2.23GB

Seems mail and graphite images are both there twice. Is that right?

[nebulon]

@jdaviescoates well it is the bare minimum, below it would even refuse to install. So on top of this it depends which app(s) are installed and how large those app images are, next to the data itself of course. So not sure what kind of solution is expected to be honest.

[jdaviescoates]

@nebulon I'd say what I'm now looking for is for it to be made clear that the bare minimum evidently needs to be higher than 20GB, because even with only one tiny Uptime Kuma app with only 161.21 MB of data it is not possible to update with just 20GB.

I also wonder how much extra space would be needed for the update to successfully run?

Perhaps something like 25GB is the real bare minimum if one wants updates to work?

[msbt]

@jdaviescoates it might also depend on the images of your hosting provider. I have a few 20GB machines at Hetzner (although your signature mentions that as well) which have WordPress and webmail installed and still a few GB to spare:

before update (v7.3.4)

after update (v7.3.5)

You can try to run a docker image prune -a and see if you gain some of that space back, but it seems your Ubuntu image is already taking up almost 2GB more than the one on my Hetzner Cloud server.

[jdaviescoates]

@msbt said in Cannot update due to one tiny app filling up 20GB drive:

docker image prune -a

Thanks, this machine is actually on Netcup. Perhaps their Ubuntu image is bigger for some reason.

I ran that docker command which did free up some space, but still not enough for the update to run.

[girish]

@jdaviescoates The updater checks if the server has atleast 2GB space (hardcoded).

[girish]

Maybe you can reduce the swap space to 1GB to get reclaim some space. I think sudo swapoff -a . Then, truncate -s 1G /apps.swap and sudo swapon -a.

[jdaviescoates]

@girish said in Cannot update due to one tiny app filling up 20GB drive:

@jdaviescoates The updater checks if the server has atleast 2GB space (hardcoded).

Go to know, thanks.

Would be nice if the Event log error specified that.

So, instead of just:

Cloudron update errored. Error: Not enough disk space

Have it say:

Cloudron update errored. Error: Not enough disk space. Updates require at least 2GB of free space

@girish said in Cannot update due to one tiny app filling up 20GB drive:

Maybe you can reduce the swap space to 1GB to get reclaim some space. I think sudo swapoff -a . Then, truncate -s 1G /apps.swap and sudo swapon -a.

Thanks, sounds like that would probably work, but I don't understand enough about what swap is used for to know what the longer term implications of that might be?

But presumably I could easily up it back to 2GB after the update?

[girish]

@jdaviescoates Good suggestion, I have fixed the error message.

As for swap, you can see free -m to see how much swap your server is using. Overall, swap is just disk space to use as RAM when your actual RAM is full. This is very hard to know if it's needed for your server. But for just uptime kuma on Cloudron, it's probably not needed.

[jdaviescoates]

@girish said in Cannot update due to one tiny app filling up 20GB drive:

sudo swapoff -a .

That didn't work, I think possibly because there was more in swap than there was free RAM or something (swapoff: /apps.swap: swapoff failed: Cannot allocate memory)

total        used        free      shared  buff/cache   available
Mem:           1.9G        897M         59M         33M        1.0G        1.0G
Swap:          1.9G        193M        1.8G

So I tried just commenting out the swap in /etc/fstab and rebooting

But that didn't help either as whilst it gave me a tiny bit more space most of it seems to have just ended up in Everything else (Ubuntu etc) instead

``

[girish]

@jdaviescoates you have to actually delete the swap file /apps.swap to get the space back.

[jdaviescoates]

@girish said in Cannot update due to one tiny app filling up 20GB drive:

@jdaviescoates you have to actually delete the swap file /apps.swap to get the space back.

Thanks! That did the job, I'm now updating. Finally!

[scooke]

@jdaviescoates Phew, my thoughts and prayers worked!