how to change mount user on unprivilege container.

[wfamy]

Hi all:
I use proxmox 6 under debian 10 using zfs filesytem
I have a mail server and i want to mount a directory from host into the guest
after install my directory looks like

ls -lhn
drwx------ 5 2000 2000 5 juil. 26 23:11 vmail1
drwx------ 2 0 0 2 juil. 5 19:14 vmail2

I want to use vmail2 for my mail
I add the following ligne in the configuration
mp0: /tankdur/fichiers/deb10mail,mp=/var/vmail/vmail2

when restart my rep looks like:

drwx------ 5 2000 2000 5 juil. 26 23:11 vmail1
drwxr-xr-x 9 65534 65534 9 juil. 5 15:50 vmail2

or

drwx------ 5 vmail vmail 5 juil. 26 23:11 vmail1
drwxr-xr-x 9 nobody nogroup 9 juil. 5 15:50 vmail2

I saw i have to mapped my user https://pve.proxmox.com/wiki/Unprivileged_LXC_containers

cat /etc/subuid
vmail:100000:65536

cat /etc/subgid
vmail:100000:65536

I try lot of combinaison in my /etc/pve/lxc/num.conf but i do not manage to "map" the id.
I may miss something but i don't know where.

So How to have my vmail2 owned by user vmail ?
Thanks for your help.

 

[oguz]

hi,

you don't need to create a custom uid map (users in unprivileged containers are already mapped with the rule 0 -> 100000), you can just set the owner of the file on your host to the default mapped id.

so to fix the nobody:nogroup you can just run on your host: chown -R 100000:100000 /var/vmail/vmail2. inside your container you will see it belongs to root. if you want it to belong to another user, change 100000 with the respective value (for example www-data would be 100033 since the uid is normally 33)

hope this helps

https://pve.proxmox.com/wiki/Linux_Container#_bind_mount_points