Hello everyone. I am trying to get my Backblaze B2 and PBS4 to work. I am able to setup an endpoint and point to the correct bucket. Whenever I try to back everything up, it gives a chunk error. My understanding is that the local cache downloads everything first and then uploads to S3. With this in mind, I increased the cache to 256GB. I am able to successfully add the datastore through my PVE GUI. I am running PBS4 in a VM on my PVE cluster. Here is the log of a failed job, says the same thing no matter what VM/LXC I try to back up. Any help is appreciated!
EDIT: I am still running PVE 8.4.11 if that matters.
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INFO: starting new backup job: vzdump 107 --node KServer1 --notification-mode auto --notes-template '{{guestname}}' --mode snapshot --remove 0 --storage PBS
INFO: Starting Backup of VM 107 (lxc)
INFO: Backup started at 2025-08-14 00:28:04
INFO: status = running
INFO: CT Name: Anchor-1
INFO: including mount point rootfs ('/') in backup
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: create storage snapshot 'vzdump'
WARNING: You have not turned on protection against thin pools running out of space.
WARNING: Set activation/thin_pool_autoextend_threshold below 100 to trigger automatic extension of thin pools before they get full.
Logical volume "snap_vm-107-disk-0_vzdump" created.
WARNING: Sum of all thin volume sizes (<120.50 GiB) exceeds the size of thin pool pve/data and the size of whole volume group (<118.24 GiB).
INFO: creating Proxmox Backup Server archive 'ct/107/2025-08-14T04:28:04Z'
INFO: set max number of entries in memory for file-based backups to 1048576
INFO: run: lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- /usr/bin/proxmox-backup-client backup --crypt-mode=none pct.conf:/var/tmp/vzdumptmp3225230_107/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid --backup-type ct --backup-id 107 --backup-time 1755145684 --entries-max 1048576 --repository root@pam@pbs:mystorage
INFO: Starting backup: ct/107/2025-08-14T04:28:04Z
INFO: Client name: KServer1
INFO: Starting backup protocol: Thu Aug 14 00:28:04 2025
INFO: No previous manifest available.
INFO: Upload config file '/var/tmp/vzdumptmp3225230_107/etc/vzdump/pct.conf' to 'root@pam@pbs:8007:mystorage' as pct.conf.blob
INFO: Upload directory '/mnt/vzsnap0' to 'root@pam@pbs:8007:mystorage' as root.pxar.didx
INFO: catalog upload error - channel closed
INFO: unclosed encoder dropped
INFO: closed encoder dropped with state
INFO: unfinished encoder state dropped
INFO: Error: failed to upload chunk to s3 backend
INFO: cleanup temporary 'vzdump' snapshot
Logical volume "snap_vm-107-disk-0_vzdump" successfully removed.
ERROR: Backup of VM 107 failed - command 'lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- /usr/bin/proxmox-backup-client backup '--crypt-mode=none' pct.conf:/var/tmp/vzdumptmp3225230_107/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found '--exclude=/tmp/?*' '--exclude=/var/tmp/?*' '--exclude=/var/run/?*.pid' --backup-type ct --backup-id 107 --backup-time 1755145684 --entries-max 1048576 --repository root@pam@pbs:mystorage' failed: exit code 255
INFO: Failed at 2025-08-14 00:28:26
INFO: Backup job finished with errors
INFO: notified via target `mail-to-root`
TASK ERROR: job errors
EDIT: I am still running PVE 8.4.11 if that matters.
()
INFO: starting new backup job: vzdump 107 --node KServer1 --notification-mode auto --notes-template '{{guestname}}' --mode snapshot --remove 0 --storage PBS
INFO: Starting Backup of VM 107 (lxc)
INFO: Backup started at 2025-08-14 00:28:04
INFO: status = running
INFO: CT Name: Anchor-1
INFO: including mount point rootfs ('/') in backup
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: create storage snapshot 'vzdump'
WARNING: You have not turned on protection against thin pools running out of space.
WARNING: Set activation/thin_pool_autoextend_threshold below 100 to trigger automatic extension of thin pools before they get full.
Logical volume "snap_vm-107-disk-0_vzdump" created.
WARNING: Sum of all thin volume sizes (<120.50 GiB) exceeds the size of thin pool pve/data and the size of whole volume group (<118.24 GiB).
INFO: creating Proxmox Backup Server archive 'ct/107/2025-08-14T04:28:04Z'
INFO: set max number of entries in memory for file-based backups to 1048576
INFO: run: lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- /usr/bin/proxmox-backup-client backup --crypt-mode=none pct.conf:/var/tmp/vzdumptmp3225230_107/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid --backup-type ct --backup-id 107 --backup-time 1755145684 --entries-max 1048576 --repository root@pam@pbs:mystorage
INFO: Starting backup: ct/107/2025-08-14T04:28:04Z
INFO: Client name: KServer1
INFO: Starting backup protocol: Thu Aug 14 00:28:04 2025
INFO: No previous manifest available.
INFO: Upload config file '/var/tmp/vzdumptmp3225230_107/etc/vzdump/pct.conf' to 'root@pam@pbs:8007:mystorage' as pct.conf.blob
INFO: Upload directory '/mnt/vzsnap0' to 'root@pam@pbs:8007:mystorage' as root.pxar.didx
INFO: catalog upload error - channel closed
INFO: unclosed encoder dropped
INFO: closed encoder dropped with state
INFO: unfinished encoder state dropped
INFO: Error: failed to upload chunk to s3 backend
INFO: cleanup temporary 'vzdump' snapshot
Logical volume "snap_vm-107-disk-0_vzdump" successfully removed.
ERROR: Backup of VM 107 failed - command 'lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- /usr/bin/proxmox-backup-client backup '--crypt-mode=none' pct.conf:/var/tmp/vzdumptmp3225230_107/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found '--exclude=/tmp/?*' '--exclude=/var/tmp/?*' '--exclude=/var/run/?*.pid' --backup-type ct --backup-id 107 --backup-time 1755145684 --entries-max 1048576 --repository root@pam@pbs:mystorage' failed: exit code 255
INFO: Failed at 2025-08-14 00:28:26
INFO: Backup job finished with errors
INFO: notified via target `mail-to-root`
TASK ERROR: job errors
