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On Mon, Jul 4, 2016 at 3:38 PM, Yevgeny Zaspitsky <yzaspits(a)redhat.com>
> Sorry, I missed that you already tried that.
> Here are my thoughts (some more shooting in the dark) after reading your
> description again:
> - You have quite complicate setup. IIUC, ovirt-engine and its host are
> vSphere VMs. Then, a kind of no-macspoof should be applied from the vSphere
> side. BTW, are both of them on the same vShepre host? Is DHCP server
> another VM on that host?
> - Where/how did you "turn on Port Mirroring"?
> - I'd start the troubleshooting by using tcpdump utility in order to
> pinpoint the component that blocks the traffic.
> - Did you try assigning a static IP instead of DHCP and then check
> connectivity? If that works, then the problem is on the DHCP sever side
> - If you do not see any requests in the DHCP server log, then I guess,
> "dhclient -B" wouldn't help.
> - Please turn iptables/firewalld off.
> On Sun, Jul 3, 2016 at 9:06 PM, Yevgeny Zaspitsky <yzaspits(a)redhat.com>
>> IIUC using vdsm macspoof hook would help - reading  should help you
>> configuring that.
>>  https://github.com/oVirt/vdsm/blob/master/vdsm_hooks/macspoof/README
>> Hope that helps,
>> On Thu, Jun 30, 2016 at 6:11 AM, Clint Smith <clint.smith.maui(a)gmail.com>
>>> I have been experimenting with oVirt for the last couple of weeks and I
>>> must say it has a lot of nice features. I really like it, however, I am
>>> having a heck of a time getting the guest networking all set up correctly.
>>> I am hoping that someone can give me a little guidance in figuring this
>>> out. I apologize in advance if some of my terminology is off, I am new.
>>> Here is a brief intro to my setup:
>>> I created a Centos 7 VM within a vSphere/ESXI environment and then
>>> installed ovirt-engine on it. I also created another Centos 7 VM and set
>>> it up as a host. I have configured the Cluster and Host via the oVirt
>>> Administration Portal. For simplicity, I am using the default ovirtmgmt
>>> network as my only logical network, however I have tried several different
>>> schemes with no luck. I have a DHCP server and a DNS server that are
>>> siblings to the oVirt host and the engine. Both the engine and the host
>>> have been upgraded to version 4.0.
>>> The problem:
>>> My thought was that I would have the guest VMs on the oVirt host use my
>>> existing DHCP server to get their IP addresses, at least at first. The
>>> problem I am having is that the DHCPACK is not making it back across the
>>> ovirtmgmt bridge and on to the guest. If I tell dhclient(from the guest)
>>> to force a Broadcast (by using the –B option) on the DHCP server, it will
>>> work. This is not a solution, just a clue. Another clue is that ARP
>>> replies from the gateway don’t make it back to the machine, preventing
>>> pings even when I force the IP. Lastly, If I turn on Port Mirroring,
>>> everything works fine, but it’s my understanding that this is only for
>>> debugging purposes.
>>> What I have tried (in no particular order):
>>> - Reading the docs
>>> - Turning on VLAN tagging.
>>> - Installing the mac-spoofing hook, making the configuration changes
>>> to the engine, and then turning it on in the VM config. I also verified
>>> that the ‘filterref’ tag was removed using virsh.
>>> - Setting up a second logical network on a different subnet, and
>>> connecting it to an additional network interface that I added to the host.
>>> On the host, I setup dnsmasq as a DNS and DHCP server. I got this working
>>> up to the point of having the same issues that I was having using the
>>> existing DHCP and DNS servers on the ovirtmgmt network.
>>> - I have tried various changes to iptables as well as the original
>>> settings as well as verified that ebtables is not blocking any traffic. I
>>> did configure iptables for logging and noticed it was dropping some traffic
>>> related to DHCP, however it seemed like it was DISCOVER or REQUEST traffic
>>> due to the IN, OUT, SRC, and DST variables in the log. I have viewed the
>>> DHCP server logs multiple times and I can see that it is receiving the
>>> DISCOVER and the REQUEST from my guests MAC and sending the OFFER and ACK
>>> - Setting SELinux to Permissive
>>> - Setting ip_forward to 1
>>> - Turning STP ON on the bridge
>>> - Changing the bridge delay
>>> - Setting up a dhcrelay using dnsmasq (not sure I implemented this
>>> right though)
>>> I am really shooting in the dark when it comes to networking because I
>>> am learning a lot of this on the fly. I feel like I must have a
>>> misconception about how networking should work with oVirt. Is my entire
>>> approach naïve? Any help/guidance that someone could offer would be much
>>> Users mailing list
having an engine at 3.6.5 and following
it is not clear in my opinion what to do with 3.6 repos if I want to
upgrade to 4.0
In fact if you strictly follow what indicated, you should only run
yum update "ovirt-engine-setup*"
but this eventually shows 3.6.7 packages.
And I presume that also with 3.6 repos in places and already being in 3.6.7
the command above doesn't bring you to 4.0
Also, you cannot run something like
yum update ovirt-release
because they are different packages:
In my flow I ran
yum install http://resources.ovirt.org/pub/yum-repo/ovirt-release40.rpm
and then disable ovrt-3.6, otherwise
yum update "ovirt-engine-setup*"
anyway brings in some packages from 3.6 repos (3.6.7 I think) that seems to
be identical with 4.0 ones.
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From: Jonas Kirk Pedersen <jkp(a)asom-net.dk>
Subject: Do vm's on host start up after crash if the Engine is down
Content-Type: text/plain; charset=utf-8
Hello I am curious to what happens if ovirt and our hosts goes down due
to power failure and the ovirt-engine will not start up. Does the vm's
that was on the hosts before the crash start up again when the host is
online or does the hosts need the engine for starting the vm's Is there
some kind of cache that tells the hosts to run these vm's? Maybe from
the vmsd. Not hosted ovirt-engine but dedicated hardware for ovirt-engine=
Jonas Kirk Pedersen
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