Re: XFS corruption of in-memory data detected with KVM

[Emmanuel Florac <eflorac@intellique.com>]

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Le Thu, 22 Feb 2018 10:11:08 +0100
Andrea Mazzocchi <mazzocchiandrea24@gmail.com> écrivait:

Please keep the list cc'ed, in case someone comes with another idea.

> > Hard to say, what KVM disk format are you using? Raw, qcow2, LVM
> > volumes? If these are files (raw or qcow2), what kind of filesystem
> > and hardware stack are they living on? Are there any error on the
> > hosting system?  
> 
> Software configuration of provider's hypervisor host nodes is held in
> confidentiality:
> I can't know KVM version and configurations, unless something is
> shown in dmesg.

Hum, so we can't know for sure if something went wrong outside the VM,
annoying.

> > At tne VM level, do you see any IO error? Are you using the virtio
> > disk driver or something else?  
> 
> The errors we saw were: we failed to establish an SSH connection,
> so we went to the provider's console of the VPS and the dmesg was
> shown: the log seemed all fine until "systemd[1]: found device
> /dev/mapper/centos-root"
> (which is where it begins the dmesg I posted).
> We are using virtio disk driver.

I see. Now you'll need to boot the VM from some rescue system (possibly
the installation image of CentOS) to run xfs_repair before going any
further, unfortunately.

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