Hi all, I’m so confused about what I’m doing wrong and couldn’t find any guides/troubleshooting for my specific problem, so hoping someone here can help.

I’m setting up a new Proxmox server and trying to share a folder between 2 Ubuntu VMs - a “Fileserver” VM running the SMB server and a VM that I will be running docker on (“docker VM”)

my smb.conf on the fileserver:

[pool]
     path=/mnt/mergerfs
     read only = no
     browsable = yes

my fstab entry on the VM running docker:

//192.168.0.20/pool     /mnt/pool       cifs    _netdev,credentials=/etc/.smbcredentials,uid=1000,gid=1000      0       0

On the Docker VM, I can see that the folder is mounted properly with the correct permissions for the uid/gid specified (dockeruser) and with 755 permissions, but I am unable to write to it with either dockeruser or root. Interestingly, I am able to DELETE files on the share, which is confusing the hell out of me.

If I mount is as root (no uid/gid arguments in fstab), I am able to write to it, but for “best practices” I’d like to get it working with a non-root user. Any ideas?

  • erer@lemm.ee
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    21 hours ago

    Oh ok, that makes more sense. Then just like the other person says, it’s most likely a user permission error. Is your dockeruser in the docker VM the same as in the other VM? As in the same uid and guid? This week I created a NFS share to mount for a container and I created a new user in both side with the same uid and guid. I suggest you to use a high uid and guid to avoid conflicts.

    Edit: I think I know what is happening. The users in the allowed users at the smb conf file are not the same as the Linux users. You have to create those users with the smbpasswd command. You probably have anonymous login enabled, so when you mount the share you are actually mounting it as an anonymous user and that’s why it’s read only.