Re: [ovirt-users] oVirt - High Availability

2015-10-14 Thread Eli Mesika


- Original Message -
> From: "Indunil Jayasooriya" 
> To: "Eli Mesika" 
> Cc: users@ovirt.org
> Sent: Tuesday, October 13, 2015 6:25:59 PM
> Subject: Re: [ovirt-users] oVirt - High Availability
> 
> Hi,
> 
> Thank you very much for your reply.
> 
> I would like to know in which cases HA will happen?
> 
> 1. network failure? ( i.e , if we accidentally remove the network cable or
> if network card stopped working due to some reasons. )
> 
> 2. Server is suddenly shut-down due to power failure (i.e - NOT a proper
> shut-down ) or due to server  Hardware failure such as motherboard or
> processor.
> 
> 3. accidental reboot ?

Basically yes for all 3 
in case of 1)
There is a grace period that depends on the host load we give the host to get 
UP again and if that grace period passes then host is rebooted and HA VMs are 
atetmpted  to run on a different host 

> 
> 
> WILL HA will happen when above mentioned things happen?
> 
> 
> YES or NO?
> 
> Hope to hear from you?
> 
> 
> On Tue, Oct 13, 2015 at 7:33 PM, Eli Mesika  wrote:
> 
> >
> >
> > - Original Message -
> > > From: "Indunil Jayasooriya" 
> > > To: users@ovirt.org
> > > Sent: Tuesday, October 13, 2015 6:13:22 AM
> > > Subject: [ovirt-users] oVirt - High Availability
> > >
> > > Hi users,
> > >
> > >
> > > I have setup OVIRT 3.5 with 2 REDHAT 7.1 hosts. Everything is ok other
> > than
> > > HA ( High Availability). To test HA, Documentation says, Power
> > Management is
> > > needed.
> > >
> > > Could you pls let me know if this Power Management is a separate Device
> > or
> > > does it come with a BRANDED Server such as HP, IBM or Dell?
> >
> > PM can be implemented by a separate card or come as part of a  BRANDED
> > Server such as HP, IBM or Dell.
> >
> > >
> > > I have seen a ILO port in HP servers. Can I use it for HA ( High
> > > Availability) in ovirt?
> >
> > Yes you can, ILO is one of the PM devices supported by oVirt
> >
> > >
> > > If power management is present in Branded Servers , Could you pls let me
> > know
> > > some Branded RHEL 7.1/CentOS 7.1 supported servers?
> > >
> > > Then, I can use it for Production use.
> > >
> > >
> > > This is an YOU TUBE video for HA.
> > >
> > > https://www.youtube.com/watch?v=uHCnXGUMaS0
> > >
> > > Is this a correct video for HA?
> >
> > Please see also https://www.youtube.com/watch?v=IuRPGU7nF1E
> >
> > >
> > >
> > > I did some research.
> > >
> > > a few URLs.
> > >
> > >
> > > http://lists.ovirt.org/pipermail/users/2013-January/011519.html
> > >
> > > http://www.ovirt.org/OVirt_Administration_Guide#Host_Resilience
> > >
> > >
> > https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.5/html/Administration_Guide/sect-Improving_Uptime_with_Virtual_Machine_High_Availability.html
> > >
> > >
> > > what is Soft-Fencing Hosts ? ovirt doc gives below . (
> > > http://www.ovirt.org/OVirt_Administration_Guide#Host_Resilience )
> > >
> > > Soft-Fencing Hosts
> > >
> > >
> > > Sometimes a host becomes non-responsive due to an unexpected problem, and
> > > though VDSM is unable to respond to requests, the virtual machines that
> > > depend upon VDSM remain alive and accessible. In these situations,
> > > restarting VDSM returns VDSM to a responsive state and resolves this
> > issue.
> > >
> > > oVirt 3.3 introduces "soft-fencing over SSH". Prior to oVirt 3.3,
> > > non-responsive hosts were fenced only by external fencing devices. In
> > oVirt
> > > 3.3, the fencing process has been expanded to include "SSH Soft
> > Fencing", a
> > > process whereby oVirt attempts to restart VDSM via SSH on non-responsive
> > > hosts. If oVirt fails to restart VDSM via SSH, the responsibility for
> > > fencing falls to the external fencing agent if an external fencing agent
> > has
> > > been configured.
> > >
> > >
> > > BUT, It does NOT say how to set it up?
> > >
> > >
> > > is there any step by step doc for it?
> >
> > There is no need to set it up, soft-fencing is simply VDSM service restart
> > on the server side and is done always whether you configured PM on the host
> > or not as a first step when you host is not-responding
> >
> >
> > >
> > >
> > >
> > >
> > >
> > > HOPE TO hear from you?
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > --
> > > cat /etc/motd
> > >
> > > Thank you
> > > Indunil Jayasooriya
> > > http://www.theravadanet.net/
> > > http://www.siyabas.lk/sinhala_how_to_install.html - Download Sinhala
> > Fonts
> > >
> > >
> > > ___
> > > Users mailing list
> > > Users@ovirt.org
> > > http://lists.ovirt.org/mailman/listinfo/users
> > >
> >
> 
> 
> 
> --
> cat /etc/motd
> 
> Thank you
> Indunil Jayasooriya
> http://www.theravadanet.net/
> http://www.siyabas.lk/sinhala_how_to_install.html   -  Download Sinhala
> Fonts
> 
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Re: [ovirt-users] Logical Networks with different MTUs

2015-10-14 Thread Yevgeny Zaspitsky
Hello Cam,

The problem you described seems to be similar to the described in
https://bugzilla.redhat.com/show_bug.cgi?id=1242227.
The mentioned bug was fixed in one of the recent oVirt builds.
The updated Ovirt code allows to mix networks (regardless of them being VM
or non-VM) on a single NIC with the following conditions:

   - not more than one non-VLAN network in conjunction with any number of
   VLANs
   - MTU of the VLAN networks have to be equal to that of a non-VLAN one if
   such exists

So I'd advise you to update you oVirt to the latest build.

Regards,
Yevgeny

On Tue, Oct 6, 2015 at 2:47 AM, Cam Wright 
wrote:

> Hi,
>
> I've just started building an oVirt farm as a replacement for our
> existing infrastructure and I'm having issues configuring multiple
> VLAN bridges with different MTUs.
>
> When I try to add a logical network with a VLAN tag + VM Network + MTU
> 9000 to a bonded interface on my host with only the ovirtmgmt network
> (MTU 1500, default) it throws up an error message and won't let me
> continue, error message below:
>
> Cannot setup Networks. The following Logical Networks do not have the
> same MTU value: ovirtmgmt(default),
> net_bne_vlan10(9000).
>
> Eventually, I will want to add more logical networks with the default
> MTU, so setting the ovirtmgmt MTU to 9000 is unfortunately not going
> to solve my issue.
>
> This is something I can do in vanilla Linux networking where I set the
> 802.3ad bond to be MTU 9000 and configure two different bridges off
> that interface to 1500 and 9000, however this does not seem to be
> possible in the oVirt web interface.
>
> I've dug through the Administration guide and feature requests and
> there doesn't seem to be anything there around using different MTU
> values for different logical networks.
>
> Has anyone been able to successfully do this? The
> /etc/sysconfig/network-scripts and /var/lib/vdsm/persistence/netconf
> files seem to get rewritten whenever the vdsm service does anything,
> so I'm reluctant to edit them manually.
>
> The hosts were built using the hosted-engine installer on Fedora 22.
> The engine is running Fedora 22 also, see below:
>
> [root@bne-ovirtengine01 ~]# cat /etc/redhat-release
> Fedora release 22 (Twenty Two)
> [root@bne-ovirtengine01 ~]# uname -r
> 4.0.4-301.fc22.x86_64
>
> oVirt Engine Version: 3.6.0-1.fc22
>
> Any assistance would be appreciated.
>
> Cam Wright | Systems Administrator
> CUTTINGEDGE
> 90 Victoria St, West End, Brisbane, QLD, 4101
> T +61 7 3013 6222
> E cwri...@cuttingedge.com.au | W www.cuttingedge.com.au
>
> /SYD /BNE /MEL /TYO
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[ovirt-users] Corruped disks

2015-10-14 Thread Koen Vanoppen
Dear all,

lately we are experience some strange behaviour on our vms...
Every now and then we have disks that went corrupt. Is there a chance that
ovirt is the issue here or...? It happens (luckily) on our DEV/UAT cluster.
Since the last 4 weeks, we already had 6 vm's that went totaly corrupt...

Kind regards,

Koen
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Re: [ovirt-users] Identify the vm name in storage

2015-10-14 Thread Bello Florent
 

Hi, 

Look at VM ID and Disk ID in ovirt web UI. 

-- 

Florent
BELLO
Service Informatique
informati...@ville-kourou.fr
0594 22 31
22
Mairie de Kourou 

Le 14/10/2015 07:10, Budur Nagaraju a écrit : 

>
HI 
> 
> how to identify the vm instance in storage ? is there any way
to identify ?
> 
> Thanks, Nagaraju
> 
>
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