It's not said how to mount subdir using CephFS + FUSE
But finally found that:
Original documentation prescribes to write "none" as the source of mounting, But actually it is parsed!
Some parameters may be specified in the part of fstab entry signifying source of mounting (i.e. in place of "none")
And other (or same set ?) can be set up as "options" part.
So, the Documentation should describe at least these things:
1. Options that could be passed instead of none
2. Say exactly the preferred way of mounting subdir of CephFS using FUSE way.
#1 Updated by Марк Коренберг 23 days ago
In order not to loose linked info from https://forum.proxmox.com/threads/mount-cephfs-using-ceph-fuse-on-boot.23608/, I will write it here:
working example of FSTAB entry:
client_mountpoint=/,id=admin,mon_host=10.0.0.126,mon_host=10.0.0.127,mon_host=10.0.0.128,key=AUTH_KEY /ceph fuse.ceph defaults,noatime 0 0