Proxmox, allow smb/cifs/nfs mount (autofs) in LXC Container:

The AppArmor Method is DEPRECATED ! 

Remove the Line in the Container conf File:
nano /etc/pve/lxc/xxx.conf
lxc.apparmor.profile: unconfined

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Bind mounts allow you to access arbitrary directories from your Proxmox VE host inside a container
https://pve.proxmox.com/wiki/Linux_Container#pct_settings

1. Shutdown Container
pct shutdown 100

2. Mount the Share on the Proxmox-Host self

3. Set Mountpoint from Container to the Host Filesystem-Mountpoint
pct set 100 -mp0 /mnt/autofs/ipk,mp=/mnt/bind/ipk

4. Start the Container
pct start 100