No integration planned. The backup writes one big file (GB/TB size) and needs local network speeds to transport the data to the storage. But, you can use hook scripts to move the backup file to amazon S3 after backup.
https://pve.proxmox.com/pve-docs/chapter-vzdump.html#_hook_scripts
is this something we could engage the ProxMox team to develop?
It would be nice do use automatically S3 for backup purposes with limited writeable user (no delete options) nessescarry. Is there a plan for integration?
Here is an example from another user:
https://forum.proxmox.com/threads/backup-mysql-database.16764/
The encryption is crucial if you want to store backups in a cloud in the EU.
Wonder how we could get Dedupe involved in the process?
I can confirm that Wasabi (100% S3 compatible service ) is working fine with this solution.If you're familiar with administration of Linux servers, another approach would be mounting S3 buckets using s3fs. You could then add the mounted directory as backup storage. Feel free to read the s3fs-fuse README to get an idea how to do that and possible pitfalls of it.
In case you have very large VMs to backup, I'd not recommend storing backups on any servers outside of the local datacenter for obvious performance reasons.