zfs snapshot from inside of container

I want to send my database backup to a cloud. Generally in order to get consistent backup - the filesystem should be snapshotted. The "normal" procedure looks so:

- snapshot zfs dataset
- rcolne
- destroy snapshot

But.. it is impossible to create snapshot while beeing inside of lxc container. The above procedure works very well directly on the pve node. On the other hand - it seems to be a bad idea to do it directly on the node... :-(

I noticed that I have access to .zfs/snapshot folder...

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