"docker-volumes" is filling my whole server storage

[Dont-Worry]

Hello,

I'm encountering a critical storage issue on my server and need some assistance. My server has plenty of RAM and a powerful CPU, but very limited storage. I've been using Cloudron directly on the server's disk for several months. Recently, I've moved most of my larger applications to an external storage volume, which I mounted on the server and configured through the Cloudron panel. Everything has been working perfectly until now.

I just noticed a significant increase in storage usage from a new folder called docker-volumes. This folder is rapidly filling up the server's disk, which is a major problem. If Cloudron can no longer save anything on the server's disk, it could severely impact the applications still residing on it.

Here's the situation:

I saw the docker-volumes folder for the first time recently, and it quickly grew to nearly 200GB (currently at 188GB).
Before this, there was a folder named docker that used a lot of storage, but I assumed it would eventually level off. Now, this new docker-volumes folder is consuming all the available space.
I've attached a screenshot of the server's disk usage for reference.

I've tried to understand what docker-volumes is and why it's growing so rapidly. I came across a post from @girish mentioning that this might be related to a known issue that's being addressed. However, I need clarification on whether this is a bug, if a patch is imminent, and what immediate steps I should take.

Here are my main questions:

What exactly is the docker-volumes folder, and why is it growing so quickly?
How can I safely reduce or manage this storage usage?
Is this issue recognized as a bug, and if so, is there a timeline for a fix?
I appreciate any guidance or advice you can provide. Thank you!

[girish]

@Dont-Worry yes, this is a bug . See https://forum.cloudron.io/topic/11473/how-can-we-optimize-clean-disk-usage-from-docker-and-more/6

You can run docker volume prune -a manually for now.

[Dont-Worry]

@girish Okay this is the post I saw. I just wondered to be sure not to do anything wrong. I have to run docker volume prune -a on SSH ?
Because before writing this post I was logged in SSH and ready to do this, but I prefer to be 100% sure.

[girish]

@Dont-Worry yes, you have to run that command via SSH.

[Dont-Worry]

Perfect thank you Girish ! Doing it rn.

[Dont-Worry]

I reclaimed only 10.73 gb...

What does this new "Docker-Volumes" volume correspond to, which I didn't have before, and is it absolutely imperative for the operation of my instance?

Because I've just upgraded my infrastructure so that it can be used for several years (by adding a new remote storage volume). But if my server's internal disk saturates so quickly, it will have been in vain and I risk losing access to my instance (for me, and my users).

[girish]

@Dont-Worry Can you check the output of docker system df ? This is where the size of docker volumes comes from. Note that the disk usage information is not realtime. You have to click the refresh button (not the browser refresh) to get the latest disk usage.

[Dont-Worry]

I refresh this button very often i saw that it wasn't live updated.

Here are the output of docker system df :

user:~$ sudo docker system df
TYPE            TOTAL     ACTIVE    SIZE      RECLAIMABLE
Images          52        51        61.19GB   4.705GB (7%)
Containers      67        48        0B        0B
Local Volumes   123       123       179.2GB   0B (0%)
Build Cache     0         0         0B        0B

[girish]

@Dont-Worry I think this means that some app has a very large amount of /run or /tmp directory. Can you try docker system df -v and see which volume id it is?

Then, get the container which has that volume attached:

docker ps -a --format '{{ .ID }}' | xargs -I {} docker inspect -f '{{ .Name }}{{ printf "\n" }}{{ range .Mounts }}{{ printf "\n\t" }}{{ .Type }} {{ if eq .Type "bind" }}{{ .Source }}{{ end }}{{ .Name }} => {{ .Destination }}{{ end }}{{ printf "\n" }}' {}

If you docker inspect <containerid> you will see which app is having a large run time directory. Maybe we have a bug in some app package.

[Dont-Worry]

here is what is inside the docker that uses a lots of memory, it seems that it is a part of the Emby content I added on my server. but it shouldn't be there because i moved Emby to a new volume. I don't understand why there is videos and audio files on the server disk.

user:~$ sudo docker exec -it docker_ID /bin/bash
root@sftp:/app/code# cd /tmp
root@sftp:/tmp# ls -lah
total 130G
-rw-r--r-- 1 root root  631M May 20 12:43 -9Xo-89Hb6E0UzpXKPvMtvT_.mp4
-rw-r--r-- 1 root root  2.5G May 20 16:13 -B0LYra-w572_N_Fl-z1Fg8Y.mp4
-rw-r--r-- 1 root root  971M May 20 13:54 -H0OPKJKqQmK53HFZTtxHkCe.mp4
-rw-r--r-- 1 root root  727M May 20 17:56 -XLVWBgNrI4b4bLPiShFvnAo.mp4
-rw-r--r-- 1 root root  1.7G May 20 17:52 -kzTrAAk7QbN6242Zsh0y2WG.mp4
drwxrwxrwt 3 root root   20K May 31 00:00 .
drwxr-xr-x 1 root root  4.0K May 15 13:39 ..
-rw-r--r-- 1 root root   38M May 29 11:20 0AO3hMZZHlD0vqoaeWODHD3u.wav
-rw-r--r-- 1 root root  1.9G May 20 17:22 0K4x3d-JnMca3po-P3XxyQVa.mp4
-rw-r--r-- 1 root root  773M May 30 20:49 0PD5NHwvcHCyqBW10OHjXNp6.mp4
-rw-r--r-- 1 root root   32M May 29 10:57 0gVIwfG9iUrr4LgZ7B4nj0lh.wav
-rw-r--r-- 1 root root  285M May 20 12:51 0ivU3H-H5UVFr_pGHnUZC5i8.mp4
-rw-r--r-- 1 root root  1.3G May 20 14:29 1OJcVLRZu9IaBzS8sjBb6Pyt.mp4
-rw-r--r-- 1 root root   24M May 29 10:57 2MmAbQr3bHzIr3YBwQ0vxx6H.wav
-rw-r--r-- 1 root root  1.6G May 20 17:16 2W9hoUqn4P_o_knItBS67roC.mp4
-rw-r--r-- 1 root root  2.0G May 20 17:41 2jCmAN6k66TMsDveEFymrUc2.mp4
-rw-r--r-- 1 root root  722M May 25 12:31 3Dn7W1qdek7dHzl2DCE_r7Oy.mp4
-rw-r--r-- 1 root root  206M May 26 17:49 3l09HELCbvab-3JuPzn9beQV.mp4
-rw-r--r-- 1 root root  691M May 20 12:02 3uAaDEsKnUIYiwPqVrvBNpLW.mp4
-rw-r--r-- 1 root root  1.7G May 20 16:24 43ozkqpS5eSPdDu5lH0g-TrA.mp4
-rw-r--r-- 1 root root  893M May 23 19:38 4WMP1WSNJSoTb_JC8eELHgBw.mp4
-rw-r--r-- 1 root root  2.7G May 20 18:17 4zyr1wP6x7kol_I7KyTxCRuC.mp4
-rw-r--r-- 1 root root  1.2G May 20 14:01 5J8Yzydl0JaqXVwx5eOcsnHG.mp4
-rw-r--r-- 1 root root  1.5G May 20 15:04 6a-Rch6JMMVKNxScWLbRhNej.mp4
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-rw-r--r-- 1 root root   43M May 26 18:13 7FCXztMm6avCLwg4928xN1Us.mp4
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-rw-r--r-- 1 root root  388M May 26 18:19 7WJajkpjHZ-_fRC5X5JdQZ7Z.mp4
-rw-r--r-- 1 root root   41M May 26 11:54 7uAq-IwmbkaBN4lknPWtQrdY.mp4
-rw-r--r-- 1 root root  293M May 26 17:48 96g09TTadLH9u4TZ-ANs1rMm.mp4
-rw-r--r-- 1 root root  492M May 20 12:04 97lsl2kmk0TYKs1G6V3JNIDV.mp4
-rw-r--r-- 1 root root  1.9G May 20 18:02 9JdvMD6wTyhiDzaRW7qNQKTH.mp4
-rw-r--r-- 1 root root  3.2G May 20 14:39 A-TH8ayPCIqwHErZDc1hJ-mZ.mp4
-rw-r--r-- 1 root root  731M May 26 18:03 AOfkTofzY554Eyyvv_ktLnR_.mp4
-rw-r--r-- 1 root root  496M May 20 11:53 Alcm67xX01zsFu7XPeJw1EAi.mp4
-rw-r--r-- 1 root root  1.9G May 20 13:22 BhriY68M_QDXRU03iYb8aMj-.mp4
-rw-r--r-- 1 root root  377M May 26 18:12 C4btxzo8oMlRnv0wlG_9pPdJ.mp4
-rw-r--r-- 1 root root  1.9G May 20 13:46 Dfn0tISTx1SdbPBZVwqR-A50.mp4
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-rw-r--r-- 1 root root  902M May 30 20:56 ED7IP87SAxRpMHPeJw0gS5Ig.mp4
-rw-r--r-- 1 root root  1.7G May 20 17:35 EOasUK6qeSuwt9AzVpm4khpa.mp4
-rw-r--r-- 1 root root  157M May 26 17:51 Eq6DZ4-DJnKeQ-hzMZmpzWRt.mp4
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-rw-r--r-- 1 root root  586M May 20 13:57 G9lYmMQdxkkVAt_oryG_1zf7.mp4
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-rw-r--r-- 1 root root   40M May 29 10:58 GrvUgP_8Ruu9AcyFBCoVuxdx.wav
-rw-r--r-- 1 root root  340M May 30 20:42 GuiNGpI65P_ORQihBle9dfIW.mp4
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-rw-r--r-- 1 root root   51M May 29 10:57 P8hZzG0lqCenq6VQ2pxSCT6P.wav
-rw-r--r-- 1 root root  199M May 26 11:36 Pchx7wxD2bJK5IpC4TXDcgUd.mp4
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-rw-r--r-- 1 root root  680M May 20 12:39 Sh2wIFlT8cg6Cjh31rUTlz_7.mp4
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root@sftp:/tmp#

[Dont-Worry]

I'm currently experiencing an issue with my Cloudron server where the /tmp directories in several Docker containers are consuming a significant amount of disk space. Following the initial guidance, I performed the following steps:

1. Checked the mounted volumes for each container:
   Using the command sudo docker ps -a --format '{{ .ID }}' | xargs -I {} sudo docker inspect -f '{{ .ID }} {{ .Name }}{{ printf "\n" }}{{ range .Mounts }}{{ printf "\n\t" }}{{ .Type }} {{ if eq .Type "bind" }}{{ .Source }}{{ end }}{{ .Name }} => {{ .Destination }}{{ end }}{{ printf "\n" }}' {}, I identified the volumes mounted in each container and found that several containers have significant data in their /tmp directories.

2. Detailed inspection of /tmp directories:
   I listed the contents of the /tmp directories in each container using:

   containers=$(sudo docker ps -a -q)
   for container in $containers; do
     echo "Checking /tmp in container $container:"
     sudo docker exec -it $container sh -c "du -sh /tmp/*" || echo "/tmp is empty or not accessible"
     echo "-----------------------"
   done
   

   This revealed that several containers have large files or directories within /tmp, some reaching up to several gigabytes.

3. Plan to clean /tmp directories:
   Based on the findings, I plan to clean up the /tmp directories using the following command:

   containers=$(sudo docker ps -a -q)
   for container in $containers; do
     echo "Cleaning /tmp in container $container:"
     sudo docker exec -it $container sh -c "rm -rf /tmp/*" || echo "/tmp is empty or not accessible"
     echo "-----------------------"
   done
   

However, before proceeding, I wanted to consult with the Cloudron team to ensure that this approach won't inadvertently affect any critical application functionality.

Additionally, here are the details regarding the container consuming the most space:

Inside one of the containers, it seems that there are parts of Emby content (videos and audio files) that should not be there because Emby was moved to a new volume. However, the server disk still has these files:

user:~$ sudo docker exec -it docker_ID /bin/bash
root@sftp:/app/code# cd /tmp
root@sftp:/tmp# ls -lah
total 130G
-rw-r--r-- 1 root root  631M May 20 12:43 -9Xo-89Hb6E0UzpXKPvMtvT_.mp4
-rw-r--r-- 1 root root  2.5G May 20 16:13 -B0LYra-w572_N_Fl-z1Fg8Y.mp4
-rw-r--r-- 1 root root  971M May 20 13:54 -H0OPKJKqQmK53HFZTtxHkCe.mp4
-rw-r--r-- 1 root root  727M May 20 17:56 -XLVWBgNrI4b4bLPiShFvnAo.mp4
-rw-r--r-- 1 root root  1.7G May 20 17:52 -kzTrAAk7QbN6242Zsh0y2WG.mp4
-rw-r--r-- 1 root root   38M May 29 11:20 0AO3hMZZHlD0vqoaeWODHD3u.wav
-rw-r--r-- 1 root root  1.9G May 20 17:22 0K4x3d-JnMca3po-P3XxyQVa.mp4
-rw-r--r-- 1 root root  773M May 30 20:49 0PD5NHwvcHCyqBW10OHjXNp6.mp4
-rw-r--r-- 1 root root   32M May 29 10:57 0gVIwfG9iUrr4LgZ7B4nj0lh.wav
-rw-r--r-- 1 root root  285M May 20 12:51 0ivU3H-H5UVFr_pGHnUZC5i8.mp4
...
-rw-r--r-- 1 root root  1.2G May 20 13:54 YSJU8K5Caudu1oMhX0-a5HIS.mp4
-rw-r--r-- 1 root root  3.6G May 20 19:36 YW64K1HL_7oyQEwJCfbz5nKH.mp4
-rw-r--r-- 1 root root  270M May 26 11:56 YiSQ7xKap3kpTiJPwFaUipI2.mp4
-rw-r--r-- 1 root root  190M May 20 20:31 YqP5gd4str1rdX4Fxa1_X7uz.mp4
-rw-r--r-- 1 root root  2.2G May 20 14:23 ZCtXoF9dzT5KjJxw0QOnhh8Z.mp4
...

Questions:

1. Is there a recommended way to handle large /tmp directories in Docker containers on a Cloudron server?
2. Are there any specific precautions I should take before cleaning these directories?
3. Is there a way to prevent these large files from accumulating in /tmp in the future?

Any guidance or recommendations would be greatly appreciated.

[girish]

@Dont-Worry Not sure why all those files are there. Those files are not created by Cloudron itself, we don't use an app's tmp directory. Maybe some Emby feature is buggy? I use Emby as well for many years now and atleast my Emby's tmp here is practically empty.

Cloudron has some logic to cleanup tmp of apps. It deletes 10 days old files using find /tmp -type f -mtime +10 -exec rm -rf {} + .

[girish]

@Dont-Worry said in "docker-volumes" is filling my whole server storage:

Cloudron server where the /tmp directories in several Docker containers are consuming a significant amount of disk space

I thought the issue is Emby primarily. Do you see this for other apps too?

[girish]

@Dont-Worry said in "docker-volumes" is filling my whole server storage:

Any guidance or recommendations would be greatly appreciated.

I would just cleanup Emby's tmp by hand now (just rm then). After that, periodically monitor the tmp to see what is getting accumulated there.

[Dont-Worry]

Thank you for your guidance. Following your recommendations, we have successfully managed to free up a significant amount of storage. Here's an overview of what we did:

Identified the issue: We found that a large number of video and audio files were accumulated in the /tmp directory of one of the Docker containers (even we still don't understand how they got there). These files were not expected to be there as we had already moved Emby to a new volume.

Cleaned up manually: As you suggested, we manually cleaned up the /tmp directory of the affected container. This involved deleting all the unnecessary files that were consuming a lot of space.

Before the cleanup, the Docker volumes were consuming approximately 158GB of storage. After the cleanup, we managed to reduce it down to just 15GB.

Here's a brief look at the cleanup process:

user:~$ sudo docker exec -it <container_id> /bin/bash
root@sftp:/app/code# cd /tmp
root@sftp:/tmp# ls -lah
...

# Deleted all the large unwanted files
root@sftp:/tmp# rm -rf *.mp4 *.wav

We will continue to monitor the /tmp directories in our Docker containers to ensure they do not fill up again. For now, this manual cleanup has significantly resolved our storage issue.

[Dont-Worry]

@girish there is still 15gb of data in the docker-volumes, I hope this is not gonna do the same. But for now this solution is working for short term use.

[girish]

@Dont-Worry When you have time, dig into those 15GB too. Maybe some /run or /tmp is getting filled up with something. We have to do this app by app to understand why it's getting filled up. Because as mentioned, Cloudron doesn't access those directories, it's part of the apps.

[Dont-Worry]

Thanks for the guidance @girish . We've followed your recommendations and conducted a thorough cleanup of the /tmp and /run directories within our Docker containers. Here’s a summary of our findings and actions taken:

Containers Cleaned:

Emby
N8N
Cal
Uptime Kuma
OpenWebUI
Penpot
A few other containers which I could not identify precisely

Actions Taken:

Cleared substantial temporary and cache files from the /run and /tmp directories across these containers.
Specifically, we found large amounts of data in the /run directories of Calcom and Penpot, and in the /tmp directories of Penpot and N8N.

Results:

We successfully freed up approximately 8GB of space.
There are still about 8.5GB left in the docker-volumes.
Despite the cleanup, it appears that some applications, particularly the ones mentioned, might still have some lingering files contributing to the remaining usage. We will continue to monitor the disk usage and investigate further if necessary.

[Dont-Worry]

Hi,

I wanted to provide an update on the ongoing issue with my server storage being filled by docker-volumes. Despite performing manual cleanups and managing Docker volumes, the problem persists. The data continues to reappear, causing storage usage to climb rapidly.

A couple of days ago, after extensive cleaning, we managed to free up space and bring it down to around 20GB. However, the storage usage has been increasing at an alarming rate of approximately 20GB per day. This rapid growth is not only concerning but also quite unstable, making it difficult to maintain a functional server.

Having to manually clean up the storage repeatedly is both time-consuming and frustrating. This situation is unsustainable in the long term, and I am reaching out to see if anyone has further insights into why this is happening. What exactly is causing the docker-volumes to fill up so quickly? Is there a specific application or a known issue that might be contributing to this problem?

Any advice or solutions to address this issue more permanently would be greatly appreciated.

There is 20gb that has been added between this morning 7AM (63GB in Docker-Volumes) and now (80.64GB).

[girish]

@Dont-Worry said in "docker-volumes" is filling my whole server storage:

What exactly is causing the docker-volumes to fill up so quickly? Is there a specific application or a known issue that might be contributing to this problem?

Have you identified which apps are filling up the volumes this time around? Is this emby again?