Open Stack

yes thx tobias, did you try live-migration after this change? I will
try on my end too and share whether it worked with the DiskFilter
disabled or not. thx will

On Mon, Aug 15, 2016 at 4:22 PM, Tobias Urdin <tobias.urdin at crystone.com> wrote:
> Hello,
>
> We are having this issue in production and I have since pushed for a fix
> for this.
>
> We solved it by removing the DiskFilter filter, ignore any RT data from
> nova and seen in horizon and keep close monitoring on our block storage
> usage.
>
> nova.conf:
>
> #scheduler_default_filters = RetryFilter, AvailabilityZoneFilter,
> RamFilter, DiskFilter, ComputeFilter, ComputeCapabilitiesFilter,
> ImagePropertiesFilter, ServerGroupAntiAffinityFilter,
> ServerGroupAffinityFilter
> scheduler_default_filters = RetryFilter, AvailabilityZoneFilter,
> RamFilter, ComputeFilter, ComputeCapabilitiesFilter,
> ImagePropertiesFilter, ServerGroupAntiAffinityFilter,
> ServerGroupAffinityFilter
>
> Default options is the one commented out, the other one has DiskFilter
> removed.
>
> We haven't had any issues after removing the DiskFilter.
>
>
> Best regards
>
>
> On 08/15/2016 10:17 AM, Kostiantyn.Volenbovskyi at swisscom.com wrote:
>> Hi,
>>
>> Just to add that this bug was recently brought up in openstack-dev [1]
>>
>> it sounds that you are waiting for fix via [2] or, probably more likely [3]
>> Disabling DiskFilter sounds like OK workaround in case your VMs are never booted from image in your OpenStack Region(s).
>> But if I understand the fault - the migrate/resize/live migrate/rebuild/evacuate will not work because
>> . assuming that on target Compute Host you don't have local disk - and your flavor has more than 0 GB for root and/or ephemeral disk
>> -it would fail.
>>
>> So I would say that setting your root disk space to '0' in the flavor might be a better workaround
>>
>> BR,
>> Konstantin
>> [1] http://lists.openstack.org/pipermail/openstack-dev/2016-August/101566.html
>> [2] https://review.openstack.org/#/c/200870/
>> [3] https://review.openstack.org/#/c/355091/
>>
>>
>>> -----Original Message-----
>>> From: William Josefsson [mailto:william.josefson at gmail.com]
>>> Sent: Sunday, August 14, 2016 5:47 PM
>>> To: openstack-operators at lists.openstack.org
>>> Subject: [Openstack-operators] DiskFilter Disabled - No valid host was found
>>>
>>> Hello, I got Error, no valid host was found while trying to provision and I could in
>>> nova-scheduler.log see that the DiskFilter failed to find a compute host. My OS is
>>> CentOS7/ running Liberty.
>>>
>>> If I'm not mistaken, it is a bug that DiskFilter checks space available on compute-
>>> host / partition even when I'm using iSCSI and RBD backends. The / is no way
>>> near full.
>>> https://bugs.launchpad.net/nova/+bug/1358566
>>>
>>> Can anyone confirm whether it is fine to disable DiskFilter if I'm using iSCSI and
>>> RBD backend or would anything else brake? thx will
>>>
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>>
>