[PVE-User] KVM Guest Ubuntu goes RO-Filesystem every some night

Christopher Meyering christopher.meyering at dia-software.de
Fri May 20 08:52:38 CEST 2016


the servers are "brand new" (oldest bought about 4 months ago).
The following bios is used:
Vendor: Intel Corporation
Version: SE5C610.86B.01.01.0009.060120151350
Release Date: 06/01/2015

the logs on the guest don't say anything (bad luck: they lay on the 
partition which went ro), and in host syslog / kern.log isn't anything 
strange either.

I forget a thing:
The guests drive live in an zfs store on the raid systems.
Maybe it's important to know this.

I'm thinking of switching to ubuntu virtual kernel, but i'm not quite 
sure if it will help or break even more stuff.


Am 20.05.2016 um 08:42 schrieb Brian :::
> Is there anything in logs on guest or host around that time?
> On Fri, May 20, 2016 at 7:42 AM, Eneko Lacunza <elacunza at binovo.es> wrote:
>> Hi,
>> El 20/05/16 a las 08:19, Christopher Meyering escribió:
>>> Hi folks,
>>> Maybe someone of you has some idea how to get rid of my strange
>>> "ro-filesytem" problem.
>>> First of all some basics:
>>> Proxmox runs on a potent host, powering the kvm-guests with 2 raids. (1
>>> ssd raid & 2 sas raid)
>>> In our pve cluster we currently run 4 identical hosts with overall 50 kvm
>>> guests on it.
>>> Every guest runs ubuntu server 14.04 with webservers, mysql & solr
>>> services.
>>> Since 3 weeks ago some guests started to fall into ro-state root
>>> filesystems at night without any noticeable reason.
>>> The stress on the hosts and guests is quite normal at these times and the
>>> problems occure on different times between 01:00 and 06:30 in the morning.
>>> Occurently i can see some serious cpu soft locks with over 40s stuck time.
>> This is on the PVE hosts? What brand/model are the servers, BIOS
>> version/date? (dmidecode)
>> If BIOS is old (pre-2010 I think), there can be power management problems.
>> You can also check power management in BIOS/UEFI and limit power saving to
>> see if that helps.
>> Cheers
>> Eneko
>> --
>> Zuzendari Teknikoa / Director Técnico
>> Binovo IT Human Project, S.L.
>> Telf. 943493611
>>        943324914
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Mit freundlichem Gruß
Christopher Meyering
Technical Consultant

DIA Connecting Software

DIA Connecting Software GmbH & Co. KG · Menkestraße 23 · 26419 Schortens
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<mailto:christopher.meyering at dia-software.de>

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