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

[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
>
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