[ovirt-users] Re: iSCSI multipath with separate subnets... still not possible in 4.4.x?

2020-07-18 Thread Vinícius Ferrão via Users
I second that, I’ve tirelessly talked about this and just given up, it’s a 
basic feature that keeps oVirt lagging behind.

> On 18 Jul 2020, at 04:47, Uwe Laverenz  wrote:
> 
> Hi Mark,
> 
> Am 14.07.20 um 02:14 schrieb Mark R:
> 
>> I'm looking through quite a few bug reports and mailing list threads,
>> but want to make sure I'm not missing some recent development.  It
>> appears that doing iSCSI with two separate, non-routed subnets is
>> still not possible with 4.4.x. I have the dead-standard iSCSI setup
>> with two separate switches, separate interfaces on hosts and storage,
>> and separate subnets that have no gateway and are completely
>> unreachable except from directly attached interfaces.
> 
> I haven't tested 4.4 yet but AFAIK nothing has changed, OVirt iSCSI bonds 
> don't work with separated, isolated subnets:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1474904
> 
> I don't use them as multipathing generally works without OVirt bonds in my 
> setup, I configured multipathd directly to use round robin e.g..
> 
> cu,
> Uwe
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[ovirt-users] Re: VDSM HOST ISSUE - Message timeout which can be caused by communication issues

2020-07-18 Thread Strahil Nikolov via Users
Hm... then you need to play on a TEST ovirt with the options described in in 
https://www.ovirt.org/develop/developer-guide/engine/engine-config-options.html 

Some of the more interesting options are:

SSHInactivityTimoutSeconds

TimeoutToResetVdsInSeconds
VDSAttemptsToResetCount
VdsRecoveryTimeoutInMintues
VdsRefreshRate
vdsTimeout


Try them first in a test system before deploying on production.

Best Regards,
Strahil Nikolov



В събота, 18 юли 2020 г., 10:40:14 Гринуич+3, lu.alfo...@almaviva.it 
 написа: 





Hello,

yes, root login is opened.
No, I didn't make changes to the sshd_config

The fact is that this issue happens from time to time. Let me give you more 
details:

When the hosts go in "non responsive state", probably due to network errors, 
they remain in this state for a few hours. In the meantime, if we try to reach 
the hosts and the vm, we can connect to them correctly. 
So in my opinion, the ovirt manager, when it is not able to reach the 
hypervisors, set the server in the non responsive state, but it has issues when 
he tries to reconnect to it and to bring them up again.

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[ovirt-users] Re: iSCSI multipath with separate subnets... still not possible in 4.4.x?

2020-07-18 Thread Uwe Laverenz

Hi Mark,

Am 14.07.20 um 02:14 schrieb Mark R:


I'm looking through quite a few bug reports and mailing list threads,
but want to make sure I'm not missing some recent development.  It
appears that doing iSCSI with two separate, non-routed subnets is
still not possible with 4.4.x. I have the dead-standard iSCSI setup
with two separate switches, separate interfaces on hosts and storage,
and separate subnets that have no gateway and are completely
unreachable except from directly attached interfaces.


I haven't tested 4.4 yet but AFAIK nothing has changed, OVirt iSCSI 
bonds don't work with separated, isolated subnets:


https://bugzilla.redhat.com/show_bug.cgi?id=1474904

I don't use them as multipathing generally works without OVirt bonds in 
my setup, I configured multipathd directly to use round robin e.g..


cu,
Uwe
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[ovirt-users] Re: VDSM HOST ISSUE - Message timeout which can be caused by communication issues

2020-07-18 Thread lu . alfonsi
Hello,

yes, root login is opened.
No, I didn't make changes to the sshd_config

The fact is that this issue happens from time to time. Let me give you more 
details:

When the hosts go in "non responsive state", probably due to network errors, 
they remain in this state for a few hours. In the meantime, if we try to reach 
the hosts and the vm, we can connect to them correctly. 
So in my opinion, the ovirt manager, when it is not able to reach the 
hypervisors, set the server in the non responsive state, but it has issues when 
he tries to reconnect to it and to bring them up again.
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