qmp command 'backup' failed

speedlnx · Sep 23, 2020

Hello, if i run manual backup (via the vm web menu) I can do incremental backup in my PBS server without any problem. Mode snapshot.

Code:

INFO: starting new backup job: vzdump 123 --remove 0 --mode snapshot --storage c03 --node cloud03-hz
INFO: Starting Backup of VM 123 (qemu)
INFO: Backup started at 2020-09-23 18:54:34
INFO: status = running
INFO: VM Name: XXXXX
INFO: include disk 'scsi0' 'vms:123/vm-123-disk-0.qcow2' 8G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating Proxmox Backup Server archive 'vm/123/2020-09-23T16:54:34Z'
INFO: issuing guest-agent 'fs-freeze' command
INFO: enabling encryption
INFO: issuing guest-agent 'fs-thaw' command
INFO: started backup task '5dbb216c-8a45-431f-8766-ec0bfa6df326'
INFO: resuming VM again
INFO: scsi0: dirty-bitmap status: created new
INFO:   3% (256.0 MiB of 8.0 GiB) in  3s, read: 85.3 MiB/s, write: 68.0 MiB/s
INFO:   5% (440.0 MiB of 8.0 GiB) in  6s, read: 61.3 MiB/s, write: 61.3 MiB/s
INFO:   6% (556.0 MiB of 8.0 GiB) in  9s, read: 38.7 MiB/s, write: 38.7 MiB/s
INFO:   9% (772.0 MiB of 8.0 GiB) in 12s, read: 72.0 MiB/s, write: 72.0 MiB/s
INFO:  11% (972.0 MiB of 8.0 GiB) in 15s, read: 66.7 MiB/s, write: 66.7 MiB/s
INFO:  14% (1.1 GiB of 8.0 GiB) in 18s, read: 62.7 MiB/s, write: 62.7 MiB/s
INFO:  16% (1.3 GiB of 8.0 GiB) in 21s, read: 69.3 MiB/s, write: 69.3 MiB/s
INFO:  18% (1.5 GiB of 8.0 GiB) in 24s, read: 61.3 MiB/s, write: 56.0 MiB/s
INFO:  27% (2.2 GiB of 8.0 GiB) in 27s, read: 228.0 MiB/s, write: 86.7 MiB/s
INFO:  43% (3.5 GiB of 8.0 GiB) in 30s, read: 454.7 MiB/s, write: 69.3 MiB/s
INFO:  46% (3.7 GiB of 8.0 GiB) in 33s, read: 62.7 MiB/s, write: 62.7 MiB/s
INFO:  48% (3.9 GiB of 8.0 GiB) in 36s, read: 62.7 MiB/s, write: 61.3 MiB/s
INFO:  51% (4.1 GiB of 8.0 GiB) in 39s, read: 90.7 MiB/s, write: 68.0 MiB/s
INFO:  54% (4.3 GiB of 8.0 GiB) in 42s, read: 61.3 MiB/s, write: 61.3 MiB/s
INFO:  56% (4.5 GiB of 8.0 GiB) in 45s, read: 68.0 MiB/s, write: 68.0 MiB/s
INFO:  58% (4.7 GiB of 8.0 GiB) in 48s, read: 61.3 MiB/s, write: 61.3 MiB/s
INFO:  61% (4.9 GiB of 8.0 GiB) in 51s, read: 65.3 MiB/s, write: 65.3 MiB/s
INFO:  63% (5.1 GiB of 8.0 GiB) in 54s, read: 65.3 MiB/s, write: 65.3 MiB/s
INFO:  65% (5.3 GiB of 8.0 GiB) in 57s, read: 64.0 MiB/s, write: 60.0 MiB/s
INFO:  68% (5.5 GiB of 8.0 GiB) in  1m  0s, read: 68.0 MiB/s, write: 62.7 MiB/s
INFO:  70% (5.7 GiB of 8.0 GiB) in  1m  3s, read: 62.7 MiB/s, write: 62.7 MiB/s
INFO:  73% (5.9 GiB of 8.0 GiB) in  1m  6s, read: 76.0 MiB/s, write: 74.7 MiB/s
INFO:  77% (6.2 GiB of 8.0 GiB) in  1m  9s, read: 116.0 MiB/s, write: 65.3 MiB/s
INFO:  80% (6.4 GiB of 8.0 GiB) in  1m 12s, read: 77.3 MiB/s, write: 77.3 MiB/s
INFO:  83% (6.7 GiB of 8.0 GiB) in  1m 15s, read: 76.0 MiB/s, write: 76.0 MiB/s
INFO:  85% (6.9 GiB of 8.0 GiB) in  1m 18s, read: 66.7 MiB/s, write: 66.7 MiB/s
INFO:  88% (7.0 GiB of 8.0 GiB) in  1m 21s, read: 61.3 MiB/s, write: 54.7 MiB/s
INFO:  90% (7.3 GiB of 8.0 GiB) in  1m 24s, read: 73.3 MiB/s, write: 48.0 MiB/s
INFO:  93% (7.5 GiB of 8.0 GiB) in  1m 27s, read: 66.7 MiB/s, write: 58.7 MiB/s
INFO:  95% (7.6 GiB of 8.0 GiB) in  1m 30s, read: 61.3 MiB/s, write: 58.7 MiB/s
INFO:  98% (7.9 GiB of 8.0 GiB) in  1m 33s, read: 81.3 MiB/s, write: 58.7 MiB/s
INFO: 100% (8.0 GiB of 8.0 GiB) in  1m 35s, read: 64.0 MiB/s, write: 30.0 MiB/s
INFO: backup is sparse: 1.84 GiB (22%) total zero data
INFO: backup was done incrementally, reused 2.12 GiB (26%)
INFO: transferred 8.00 GiB in 95 seconds (86.2 MiB/s)
INFO: Finished Backup of VM 123 (00:01:35)
INFO: Backup finished at 2020-09-23 18:56:09
INFO: Backup job finished successfully
TASK OK

If I run the same backup from the proxmox scheduler it fail with:

Code:

INFO: starting new backup job: vzdump 123 --storage c03 --mailnotification always --compress zstd --mailto xxx@xxx.xxx --quiet 1 --mode snapshot
INFO: Starting Backup of VM 123 (qemu)
INFO: Backup started at 2020-09-23 19:03:02
INFO: status = running
INFO: VM Name: XXXXX
INFO: include disk 'scsi0' 'vms:123/vm-123-disk-0.qcow2' 8G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating Proxmox Backup Server archive 'vm/123/2020-09-23T17:03:02Z'
INFO: issuing guest-agent 'fs-freeze' command
INFO: enabling encryption
INFO: issuing guest-agent 'fs-thaw' command
ERROR: VM 123 qmp command 'backup' failed - backup register image failed: command error: no previous backup found, cannot do incremental backup
ERROR: Backup of VM 123 failed - VM 123 qmp command 'backup' failed - backup register image failed: command error: no previous backup found, cannot do incremental backup
INFO: Failed at 2020-09-23 19:03:03
INFO: Backup job finished with errors

TASK ERROR: job errors

Proxmox Backup Server 0.8.19-1

Proxmox Server:

proxmox-ve: 6.2-2 (running kernel: 5.4.55-1-pve)
pve-manager: 6.2-11 (running version: 6.2-11/22fb4983)
pve-kernel-5.4: 6.2-7
pve-kernel-helper: 6.2-7
pve-kernel-5.4.65-1-pve: 5.4.65-1
pve-kernel-5.4.60-1-pve: 5.4.60-2
pve-kernel-5.4.55-1-pve: 5.4.55-1
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.0.4-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: 0.8.35+pve1
libjs-extjs: 6.0.1-10
libknet1: 1.16-pve1
libproxmox-acme-perl: 1.0.5
libpve-access-control: 6.1-2
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.2-2
libpve-guest-common-perl: 3.1-3
libpve-http-server-perl: 3.0-6
libpve-storage-perl: 6.2-6
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.3-1
lxcfs: 4.0.3-pve3
novnc-pve: 1.1.0-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.2-12
pve-cluster: 6.1-8
pve-container: 3.2-1
pve-docs: 6.2-5
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-2
pve-firmware: 3.1-3
pve-ha-manager: 3.1-1
pve-i18n: 2.2-1
pve-qemu-kvm: 5.1.0-2
pve-xtermjs: 4.7.0-2
qemu-server: 6.2-14
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 0.8.4-pve1

Dominic · Oct 2, 2020

If I run the same backup from the proxmox scheduler it fail with:

You mean a backup job in Proxmox VE? Backup jobs are basically cron jobs. You can check the exact command that gets executed using

Code:

cat /etc/pve/vzdump.cron

Of course, the exact command is also in the logs, so you could copy&paste that too, to recreate the problem.

Is it a copy & paste error, that the backup client is not on your Proxmox VE? What is the following?

Code:

pveversion -v | grep backup-client

speedlnx · Oct 5, 2020

Hello, as you can see in the logs I post before the command is almost the same

Code:

root@********~ # pveversion -v | grep backup-client
proxmox-backup-client: 0.9.0-1
root@******** ~ #

speedlnx · Dec 20, 2020

Still problems with some vm (4 on a total of more then 20).

Code:

INFO: Starting Backup of VM 100 (qemu)
INFO: Backup started at 2020-12-20 05:30:02
INFO: status = running
INFO: VM Name: TargetCross-SQL
INFO: include disk 'virtio0' 'backup:100/vm-100-disk-0.qcow2' 80G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating Proxmox Backup Server archive 'vm/100/2020-12-20T04:30:02Z'
INFO: issuing guest-agent 'fs-freeze' command
INFO: enabling encryption
INFO: issuing guest-agent 'fs-thaw' command
ERROR: VM 100 qmp command 'backup' failed - backup register image failed: command error: no previous backup found, cannot do incremental backup
INFO: aborting backup job
ERROR: Backup of VM 100 failed - VM 100 qmp command 'backup' failed - backup register image failed: command error: no previous backup found, cannot do incremental backup
INFO: Failed at 2020-12-20 05:30:11

proxmox-backup-client: 1.0.6-1

Package: proxmox-backup-server
Version: 1.0.6-1

speedlnx · Apr 4, 2021

No one has the same problem? If I delete all the backups from the PBS server the first backup works like a charm, the second one break with the same error.

Client

proxmox-ve: 6.3-1 (running kernel: 5.4.73-1-pve)
pve-manager: 6.3-6 (running version: 6.3-6/2184247e)
pve-kernel-5.4: 6.3-8
pve-kernel-helper: 6.3-8
pve-kernel-5.4.106-1-pve: 5.4.106-1
pve-kernel-5.4.98-1-pve: 5.4.98-1
pve-kernel-5.4.73-1-pve: 5.4.73-1
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.1.0-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: residual config
ifupdown2: 3.0.0-1+pve3
libjs-extjs: 6.0.1-10
libknet1: 1.20-pve1
libproxmox-acme-perl: 1.0.8
libproxmox-backup-qemu0: 1.0.3-1
libpve-access-control: 6.1-3
libpve-apiclient-perl: 3.1-3
libpve-common-perl: 6.3-5
libpve-guest-common-perl: 3.1-5
libpve-http-server-perl: 3.1-1
libpve-storage-perl: 6.3-7
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.6-2
lxcfs: 4.0.6-pve1
novnc-pve: 1.1.0-1
proxmox-backup-client: 1.0.12-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.4-9
pve-cluster: 6.2-1
pve-container: 3.3-4
pve-docs: 6.3-1
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-3
pve-firmware: 3.2-2
pve-ha-manager: 3.1-1
pve-i18n: 2.3-1
pve-qemu-kvm: 5.2.0-5
pve-xtermjs: 4.7.0-3
qemu-server: 6.3-10
smartmontools: 7.2-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 2.0.4-pve1

Server

Proxmox Backup server: 1.0-11

First backup

Code:

INFO: starting new backup job: vzdump 102 --storage c03 --remove 0 --mode snapshot --node cloud03-hz
INFO: Starting Backup of VM 102 (qemu)
INFO: Backup started at 2021-04-04 16:02:58
INFO: status = running
INFO: VM Name: chr-04
INFO: include disk 'virtio0' 'vms:102/vm-102-disk-0.qcow2' 128M
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating Proxmox Backup Server archive 'vm/102/2021-04-04T14:02:58Z'
INFO: issuing guest-agent 'fs-freeze' command
INFO: enabling encryption
INFO: issuing guest-agent 'fs-thaw' command
INFO: started backup task 'df32be40-32c0-4f4d-872c-80bbd7c27b06'
INFO: resuming VM again
INFO: virtio0: dirty-bitmap status: existing bitmap was invalid and has been cleared
INFO: 100% (128.0 MiB of 128.0 MiB) in 2s, read: 64.0 MiB/s, write: 60.0 MiB/s
INFO: backup is sparse: 8.00 MiB (6%) total zero data
INFO: backup was done incrementally, reused 8.00 MiB (6%)
INFO: transferred 128.00 MiB in 2 seconds (64.0 MiB/s)
INFO: Finished Backup of VM 102 (00:00:02)
INFO: Backup finished at 2021-04-04 16:03:00
INFO: Backup job finished successfully
TASK OK

Second backup

Code:

INFO: starting new backup job: vzdump 102 --storage c03 --node cloud03-hz --remove 0 --mode snapshot
INFO: Starting Backup of VM 102 (qemu)
INFO: Backup started at 2021-04-04 16:03:11
INFO: status = running
INFO: VM Name: chr-04
INFO: include disk 'virtio0' 'vms:102/vm-102-disk-0.qcow2' 128M
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating Proxmox Backup Server archive 'vm/102/2021-04-04T14:03:11Z'
INFO: issuing guest-agent 'fs-freeze' command
INFO: enabling encryption
INFO: issuing guest-agent 'fs-thaw' command
ERROR: VM 102 qmp command 'backup' failed - backup register image failed: command error: no previous backup found, cannot do incremental backup
INFO: aborting backup job
ERROR: Backup of VM 102 failed - VM 102 qmp command 'backup' failed - backup register image failed: command error: no previous backup found, cannot do incremental backup
INFO: Failed at 2021-04-04 16:03:12
INFO: Backup job finished with errors
TASK ERROR: job errors

Dominic · Apr 6, 2021

If you log in to PBS, do the logs show anything unusual? Can you verify the first backup? Have you installed PBS from the official ISO installer?

Might be related:

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qmp command 'backup' failed

speedlnx

Renowned Member

Dominic

Proxmox Retired Staff

speedlnx

Renowned Member

speedlnx

Renowned Member

speedlnx

Renowned Member

Dominic

Proxmox Retired Staff

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