Syncthing on Docker using usbhdd

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1

Hey there, i want to start a docker container with the compose code (syncthing/README-Docker.md at main · syncthing/syncthing · GitHub).

---
version: "3"
services:
  syncthing:
    image: syncthing/syncthing
    container_name: syncthing
    hostname: dockerSync
    environment:
      - PUID=1000
      - PGID=1000
    volumes:
      - /media/usbhdd/docker/syncthing/var/syncthing
    network_mode: host
    restart: unless-stopped

/media/usbhdd

is the mountingpoint of my usb hdd

the uid and gid are the ones, wich owns the mounting point.

But after i deploy this i get in the container logs

chown: /var/syncthing: Operation not permitted

2

You’re missing a colon in your volume description.

3

Doesn’t fix it. :confused:

4

No but now you have a volume mount. :slight_smile: Next step is to make sure uid 1000, as syncthing runs under by default, has write permission on the directory you created.

5

Yep, the User wich chowns the dir hast the uid 1000.

I’m using a Raspberry Pi 4, generated a new user at first boot. (Do Update and Upgrades) Then i installed docker as root and docker-compose (Install the Compose standalone | Docker Documentation). Than deployed portainer (Install Portainer BE with Docker on Linux - Portainer Documentation) Next i created the dir /media/usbhdd and chown’ed it to the generated User. At least i edited the /etc/fstab as root and entered

UID=73FF-FA36 /media/usbhdd exfat defaults,umask=022,users,nofail 0 0

Just to show my steps.

6

Just in case you weren’t already aware, an OCI container is an isolated environment, so the users inside the container don’t map 1:1 to users on the host OS, i.e., a user named “hostuser” with UID 1000 isn’t the same as a user named “containeruser” that happens to also be assigned UID 1000.

Search this forum for “portainer”, “docker” and “raspberry pi”. There are quite a few earlier posts that might be of help.

(Just my personal $0.02… If the goal of using Portainer and Docker is to learn about containers, that’s great. But if it’s simply to run Syncthing, it’s way overkill and an overly complex setup for a standalone application such as Syncthing that has minimal OS dependencies. Consider following the instructions on https://apt.syncthing.net/ instead.)

7 
$ ls -ld /media/usbhdd

drwxr-xr-x 3 root root 131072 Feb 17 12:51 /media/usbhdd

I’m not sure, but i think this doesn’t look like what it should, right?!

8

Thanks, but the suggested search just brings me back to this post of you (Search results for 'Portainer docker Raspberry pi' - Syncthing Community Forum).

9

Sorry, I should have written that better. :smirk:

Search for “portainer”, “docker” and “raspberry pi” separately and it’ll turn up a bunch of earlier posts about working with Syncthing in Docker and also a Raspberry Pi (although not necessarily in combination).

10

Do the commands umount /media/usbhdd and mount /media/usbhdd return any errors? (The /etc/fstab entry shown above shouldn’t work because the syntax isn’t correct.)

ExFAT doesn’t support Unix file attributes such as ownership, so any chown after a volume is mounted is temporary (i.e. it only lasts as long as the volume is still mounted).

11

You can specify the desired UID/GID of the mounted exfat filesystem:

UID=73FF-FA36 /media/usbhdd exfat defaults,uid=1000,gid=1000,umask=022,users,nofail 0 0
12

Hm. I dont get errors.

But i formated the usb drive as ext4. Now it works Like it should.

Thank you very much! :slight_smile:

13

Didn’t tried this but, thanks! :slight_smile: