router/firewall VM crashes during PBS backup after upgrade to PVE9 and PBS4

W

Waldo

Member
May 12, 2021
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I have following setup:
1 - Debian router VM with PCIE passthrough Intel 226-V NIC
2 - OPNsense firewall VM with virtio NIC-s
3 - other LXC and VMS
4 - configured PBS storage

Every night all VMS/LXC including router and firewall are backed up to PBS. Backup mode is snapshot. On PVE8 and PBS3 this has been working rock solid.

After upgrade to PVE9 and PBS4 almost everyday either router VM or firewall VM crash during backup and entire host looses Internet access. I have to stop/start crashed VM and all works fine until next backup. As temporary workaround I disabled PBS backup of those VMs.

Is that known issue? Shall I provide some logs?

Thank you.
 
After further troubleshooting it turned out that problem is different. During PBS backup vmbr0 stops forwarding traffic.
Code: 
auto vmbr0
iface vmbr0 inet manual
        bridge-ports enp116s0
        bridge-stp off
        bridge-fd 0
        bridge-vlan-aware yes
        bridge-vids 20 30 40 50 222
#LAN bridge
Code: 
auto vlan20
iface vlan20 inet static
        address 10.xx.yy.zz/24
        gateway 10.xx.yy.vv
        vlan-raw-device vmbr0
#MGMT
enp116s0 is Intel 226LM with igc driver.
Any if I stop/start any VM connected to vmbr0 or physical link down/up then bridge resumes forwarding traffic. Until next backup task.
 
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