PVE host random freeze with Ubuntu 19.10 VM

[Mikus]

Hello everyone,

My PVE host (up and running since 2017) started to freeze randomly while running newly installed Ubuntu 19.10 VM. Only hard host reboot solves the problem. Host and VM logs are clear about freeze, no messages. Ubuntu 19.10 VM Desktop is used in headless mode, w/o any PCI passthrough, access via TigerVNC.

Other VMs on host are up and running and not causes the freeze. Only LVM on host, and no cluster.

CPU/memory stress tests does not provoke any freeze.

Latest 6.1 PVE on host, the same problem with PVE 5.4 before upgrade.



Any experienced problem like that with Ubuntu 19.10 VM?

Any chance to turn on some diagnostics logs on host? Host motherboard without IMPI support.

 

[Stefan_R]

If you're "lucky" the freezes are actually kernel panics, and not hard lockups. The latter is *very* hard to debug, for the former, try setting up kdump and see if that at least gives you some log information to work with after the next time it crashes.

 

[Mikus]

Host pveversion otput:

Spoiler: output

proxmox-ve: 6.1-2 (running kernel: 5.3.18-2-pve)
pve-manager: 6.1-8 (running version: 6.1-8/806edfe1)
pve-kernel-helper: 6.1-7
pve-kernel-5.3: 6.1-5
pve-kernel-4.15: 5.4-14
pve-kernel-5.3.18-2-pve: 5.3.18-2
pve-kernel-4.15.18-26-pve: 4.15.18-54
pve-kernel-4.15.18-12-pve: 4.15.18-36
pve-kernel-4.15.18-11-pve: 4.15.18-34
pve-kernel-4.15.18-9-pve: 4.15.18-30
pve-kernel-4.15.17-2-pve: 4.15.17-10
pve-kernel-4.13.13-2-pve: 4.13.13-33
pve-kernel-4.13.4-1-pve: 4.13.4-26
pve-kernel-4.10.17-2-pve: 4.10.17-20
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.0.3-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: 0.8.35+pve1
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.15-pve1
libpve-access-control: 6.0-6
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.0-17
libpve-guest-common-perl: 3.0-5
libpve-http-server-perl: 3.0-5
libpve-storage-perl: 6.1-5
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 3.2.1-1
lxcfs: 3.0.3-pve60
novnc-pve: 1.1.0-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.1-3
pve-cluster: 6.1-4
pve-container: 3.0-22
pve-docs: 6.1-6
pve-edk2-firmware: 2.20200229-1
pve-firewall: 4.0-10
pve-firmware: 3.0-6
pve-ha-manager: 3.0-9
pve-i18n: 2.0-4
pve-qemu-kvm: 4.1.1-4
pve-xtermjs: 4.3.0-1
qemu-server: 6.1-7
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-1
zfsutils-linux: 0.8.3-pve1

 

[Mikus]

If you're "lucky" the freezes are actually kernel panics, and not hard lockups. The latter is *very* hard to debug, for the former, try setting up kdump and see if that at least gives you some log information to work with after the next time it crashes.

Thank you Stefan, will try today.