1:17 a.m.
Is there a way to enable promiscuous mode on virtual adapters? I can't seem to access
guest IP addresses on our product (that uses Xen). In Vmware I could enable promiscious
mode so that our guest's IP would be allow, as well as the other virtual interfaces
under it.
Any ideas?
Thanks,
Richard Seguin
1:06 p.m.
On Mon, Apr 28, 2014 at 06:17:57PM -0400, richard.seguin(a)marisec.ca wrote:
Is there a way to enable promiscuous mode on virtual adapters? I
can't seem to access guest IP addresses on our product (that uses Xen). In Vmware I
could enable promiscious mode so that our guest's IP would be allow, as well as the
other virtual interfaces under it.
Are you an oVirt user, or are you considering to migrate?
I don't quite understand your question. Could you describe your use case
again (maybe with example of your network). I'd love to understand from
where you'd like to access your guest IP.
1:33 p.m.
Hi Dan,
Yes I am an ovirt user. Basically, I am running into an issue running xen inside of kvm.
Our scenario is that this is lab environment, and we enjoy the luxury of spinning up kvm
instances (as opposed to installing on bare metal each time we need something). Our
product uses Xen, and we are pretty much stuck with it for the time being.
I think what I am running into is a double bridge issue... Xen has a bridge, and so does
kvm obviously. I am able to ping dom0 (which is just the bridge itself) on Xen from the
outside world, but I am not able to ping udom... and... udom doesn't have access out
either. When I was using vmware, I enabled promisc mode on the virtual switch, and this
solution worked fine...
If we ignore the types of technology that I am using, and just focus on the networking,
what would I be looking at as possibilities? Or... a better question would be, does ovirt
have a promiscuous flag somewhere that I can set?
-----Original Message-----
From: "Dan Kenigsberg" <danken(a)redhat.com>
Sent: Tuesday, April 29, 2014 6:06am
To: richard.seguin(a)marisec.ca
Cc: users(a)ovirt.org
Subject: Re: [ovirt-users] IP forwarding... Cannot access guest IP
On Mon, Apr 28, 2014 at 06:17:57PM -0400, richard.seguin(a)marisec.ca wrote:
Is there a way to enable promiscuous mode on virtual adapters? I
can't seem to access guest IP addresses on our product (that uses Xen). In Vmware I
could enable promiscious mode so that our guest's IP would be allow, as well as the
other virtual interfaces under it.
Are you an oVirt user, or are you considering to migrate?
I don't quite understand your question. Could you describe your use case
again (maybe with example of your network). I'd love to understand from
where you'd like to access your guest IP.
3:35 p.m.
On Tue, Apr 29, 2014 at 06:33:14AM -0400, richard.seguin(a)marisec.ca wrote:
Hi Dan,
Yes I am an ovirt user. Basically, I am running into an issue running xen inside of kvm.
Our scenario is that this is lab environment, and we enjoy the luxury of spinning up kvm
instances (as opposed to installing on bare metal each time we need something). Our
product uses Xen, and we are pretty much stuck with it for the time being.
I think what I am running into is a double bridge issue... Xen has a bridge, and so does
kvm obviously. I am able to ping dom0 (which is just the bridge itself) on Xen from the
outside world, but I am not able to ping udom... and... udom doesn't have access out
either. When I was using vmware, I enabled promisc mode on the virtual switch, and this
solution worked fine...
If we ignore the types of technology that I am using, and just focus on the networking,
what would I be looking at as possibilities? Or... a better question would be, does ovirt
have a promiscuous flag somewhere that I can set?
I cannot say that I understand your setup, but if you have nested
virtuallization (such as a Xen udom) you may experience ovirt's
no-mac-spoofing rule: by default we disallow our VMs to emit traffic
that has different mac address from the one assigned by oVirt.
To avoid this, follow http://www.ovirt.org/Vdsm_Hooks#Installing_a_hook
and report if that's the issue.
3:47 p.m.
On Tuesday, April 29, 2014 01:35:08 PM Dan Kenigsberg wrote:
On Tue, Apr 29, 2014 at 06:33:14AM -0400, richard.seguin(a)marisec.ca
wrote:
> Hi Dan,
>
> Yes I am an ovirt user. Basically, I am running into an issue running xen
> inside of kvm. Our scenario is that this is lab environment, and we
> enjoy the luxury of spinning up kvm instances (as opposed to installing
> on bare metal each time we need something). Our product uses Xen, and we
> are pretty much stuck with it for the time being.
>
> I think what I am running into is a double bridge issue... Xen has a
> bridge, and so does kvm obviously. I am able to ping dom0 (which is just
> the bridge itself) on Xen from the outside world, but I am not able to
> ping udom... and... udom doesn't have access out either. When I was
> using vmware, I enabled promisc mode on the virtual switch, and this
> solution worked fine...
>
> If we ignore the types of technology that I am using, and just focus on
> the networking, what would I be looking at as possibilities? Or... a
> better question would be, does ovirt have a promiscuous flag somewhere
> that I can set?
I cannot say that I understand your setup, but if you have nested
virtuallization (such as a Xen udom) you may experience ovirt's
no-mac-spoofing rule: by default we disallow our VMs to emit traffic
that has different mac address from the one assigned by oVirt.
To avoid this, follow http://www.ovirt.org/Vdsm_Hooks#Installing_a_hook
and report if that's the issue.
If the mac address is the issue wouldn't it be easier for him to just edit the
VM and in custom properties set macspoof to true?
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
5:49 p.m.
On Tue, Apr 29, 2014 at 08:47:38AM -0400, Alexander Wels wrote:
On Tuesday, April 29, 2014 01:35:08 PM Dan Kenigsberg wrote:
> On Tue, Apr 29, 2014 at 06:33:14AM -0400, richard.seguin(a)marisec.ca wrote:
> > Hi Dan,
> >
> > Yes I am an ovirt user. Basically, I am running into an issue running xen
> > inside of kvm. Our scenario is that this is lab environment, and we
> > enjoy the luxury of spinning up kvm instances (as opposed to installing
> > on bare metal each time we need something). Our product uses Xen, and we
> > are pretty much stuck with it for the time being.
> >
> > I think what I am running into is a double bridge issue... Xen has a
> > bridge, and so does kvm obviously. I am able to ping dom0 (which is just
> > the bridge itself) on Xen from the outside world, but I am not able to
> > ping udom... and... udom doesn't have access out either. When I was
> > using vmware, I enabled promisc mode on the virtual switch, and this
> > solution worked fine...
> >
> > If we ignore the types of technology that I am using, and just focus on
> > the networking, what would I be looking at as possibilities? Or... a
> > better question would be, does ovirt have a promiscuous flag somewhere
> > that I can set?
> I cannot say that I understand your setup, but if you have nested
> virtuallization (such as a Xen udom) you may experience ovirt's
> no-mac-spoofing rule: by default we disallow our VMs to emit traffic
> that has different mac address from the one assigned by oVirt.
>
> To avoid this, follow http://www.ovirt.org/Vdsm_Hooks#Installing_a_hook
> and report if that's the issue.
If the mac address is the issue wouldn't it be easier for him to just edit the
VM and in custom properties set macspoof to true?
yes, that's what I'm suggesting. But this requires having the hook
installed, first.
11:34 p.m.
You have no idea how much I wanted this to work...
macspoof = true
nothing changed...
-----Original Message-----
From: "Alexander Wels" <awels(a)redhat.com>
Sent: Tuesday, April 29, 2014 8:47am
To: users(a)ovirt.org
Cc: "Dan Kenigsberg" <danken(a)redhat.com>, richard.seguin(a)marisec.ca
Subject: Re: [ovirt-users] IP forwarding... Cannot access guest IP
On Tuesday, April 29, 2014 01:35:08 PM Dan Kenigsberg wrote:
On Tue, Apr 29, 2014 at 06:33:14AM -0400, richard.seguin(a)marisec.ca
wrote:
> Hi Dan,
>
> Yes I am an ovirt user. Basically, I am running into an issue running xen
> inside of kvm. Our scenario is that this is lab environment, and we
> enjoy the luxury of spinning up kvm instances (as opposed to installing
> on bare metal each time we need something). Our product uses Xen, and we
> are pretty much stuck with it for the time being.
>
> I think what I am running into is a double bridge issue... Xen has a
> bridge, and so does kvm obviously. I am able to ping dom0 (which is just
> the bridge itself) on Xen from the outside world, but I am not able to
> ping udom... and... udom doesn't have access out either. When I was
> using vmware, I enabled promisc mode on the virtual switch, and this
> solution worked fine...
>
> If we ignore the types of technology that I am using, and just focus on
> the networking, what would I be looking at as possibilities? Or... a
> better question would be, does ovirt have a promiscuous flag somewhere
> that I can set?
I cannot say that I understand your setup, but if you have nested
virtuallization (such as a Xen udom) you may experience ovirt's
no-mac-spoofing rule: by default we disallow our VMs to emit traffic
that has different mac address from the one assigned by oVirt.
To avoid this, follow http://www.ovirt.org/Vdsm_Hooks#Installing_a_hook
and report if that's the issue.
If the mac address is the issue wouldn't it be easier for him to just edit the
VM and in custom properties set macspoof to true?
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
11:37 p.m.
On Tuesday, April 29, 2014 04:34:29 PM richard.seguin(a)marisec.ca wrote:
You have no idea how much I wanted this to work...
macspoof = true
nothing changed...
I forgot to mention what Dan DID mention, go to
http://www.ovirt.org/Vdsm_Hooks
And look at the yum install vdsm-hook-macspoof part. Unless of course you
already did this.
-----Original Message-----
From: "Alexander Wels" <awels(a)redhat.com>
Sent: Tuesday, April 29, 2014 8:47am
To: users(a)ovirt.org
Cc: "Dan Kenigsberg" <danken(a)redhat.com>, richard.seguin(a)marisec.ca
Subject: Re: [ovirt-users] IP forwarding... Cannot access guest IP
On Tuesday, April 29, 2014 01:35:08 PM Dan Kenigsberg wrote:
> On Tue, Apr 29, 2014 at 06:33:14AM -0400, richard.seguin(a)marisec.ca wrote:
> > Hi Dan,
> >
> > Yes I am an ovirt user. Basically, I am running into an issue running
> > xen
> > inside of kvm. Our scenario is that this is lab environment, and we
> > enjoy the luxury of spinning up kvm instances (as opposed to installing
> > on bare metal each time we need something). Our product uses Xen, and we
> > are pretty much stuck with it for the time being.
> >
> > I think what I am running into is a double bridge issue... Xen has a
> > bridge, and so does kvm obviously. I am able to ping dom0 (which is
> > just
> > the bridge itself) on Xen from the outside world, but I am not able to
> > ping udom... and... udom doesn't have access out either. When I was
> > using vmware, I enabled promisc mode on the virtual switch, and this
> > solution worked fine...
> >
> > If we ignore the types of technology that I am using, and just focus on
> > the networking, what would I be looking at as possibilities? Or... a
> > better question would be, does ovirt have a promiscuous flag somewhere
> > that I can set?
>
> I cannot say that I understand your setup, but if you have nested
> virtuallization (such as a Xen udom) you may experience ovirt's
> no-mac-spoofing rule: by default we disallow our VMs to emit traffic
> that has different mac address from the one assigned by oVirt.
>
> To avoid this, follow http://www.ovirt.org/Vdsm_Hooks#Installing_a_hook
> and report if that's the issue.
If the mac address is the issue wouldn't it be easier for him to just edit
the VM and in custom properties set macspoof to true?
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
11:40 p.m.
Hi Alex,
I already did that part.
It's strange... The xen guest can ping dom0... but nothing beyond it... yet dom0 can
ping other addresses... and the guests... It almost sounds like I have a nat going on
here...
-----Original Message-----
From: "Alexander Wels" <awels(a)redhat.com>
Sent: Tuesday, April 29, 2014 4:37pm
To: richard.seguin(a)marisec.ca
Cc: users(a)ovirt.org, "Dan Kenigsberg" <danken(a)redhat.com>
Subject: Re: [ovirt-users] IP forwarding... Cannot access guest IP
On Tuesday, April 29, 2014 04:34:29 PM richard.seguin(a)marisec.ca wrote:
You have no idea how much I wanted this to work...
macspoof = true
nothing changed...
I forgot to mention what Dan DID mention, go to
http://www.ovirt.org/Vdsm_Hooks
And look at the yum install vdsm-hook-macspoof part. Unless of course you
already did this.
-----Original Message-----
From: "Alexander Wels" <awels(a)redhat.com>
Sent: Tuesday, April 29, 2014 8:47am
To: users(a)ovirt.org
Cc: "Dan Kenigsberg" <danken(a)redhat.com>, richard.seguin(a)marisec.ca
Subject: Re: [ovirt-users] IP forwarding... Cannot access guest IP
On Tuesday, April 29, 2014 01:35:08 PM Dan Kenigsberg wrote:
> On Tue, Apr 29, 2014 at 06:33:14AM -0400, richard.seguin(a)marisec.ca wrote:
> > Hi Dan,
> >
> > Yes I am an ovirt user. Basically, I am running into an issue running
> > xen
> > inside of kvm. Our scenario is that this is lab environment, and we
> > enjoy the luxury of spinning up kvm instances (as opposed to installing
> > on bare metal each time we need something). Our product uses Xen, and we
> > are pretty much stuck with it for the time being.
> >
> > I think what I am running into is a double bridge issue... Xen has a
> > bridge, and so does kvm obviously. I am able to ping dom0 (which is
> > just
> > the bridge itself) on Xen from the outside world, but I am not able to
> > ping udom... and... udom doesn't have access out either. When I was
> > using vmware, I enabled promisc mode on the virtual switch, and this
> > solution worked fine...
> >
> > If we ignore the types of technology that I am using, and just focus on
> > the networking, what would I be looking at as possibilities? Or... a
> > better question would be, does ovirt have a promiscuous flag somewhere
> > that I can set?
>
> I cannot say that I understand your setup, but if you have nested
> virtuallization (such as a Xen udom) you may experience ovirt's
> no-mac-spoofing rule: by default we disallow our VMs to emit traffic
> that has different mac address from the one assigned by oVirt.
>
> To avoid this, follow http://www.ovirt.org/Vdsm_Hooks#Installing_a_hook
> and report if that's the issue.
If the mac address is the issue wouldn't it be easier for him to just edit
the VM and in custom properties set macspoof to true?
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
12:11 a.m.
All of the other hypervisors that I am reading about allows for promiscuous mode to be
turned on at the host level... Do we have anything like that?
-----Original Message-----
From: "Alexander Wels" <awels(a)redhat.com>
Sent: Tuesday, April 29, 2014 4:37pm
To: richard.seguin(a)marisec.ca
Cc: users(a)ovirt.org, "Dan Kenigsberg" <danken(a)redhat.com>
Subject: Re: [ovirt-users] IP forwarding... Cannot access guest IP
On Tuesday, April 29, 2014 04:34:29 PM richard.seguin(a)marisec.ca wrote:
You have no idea how much I wanted this to work...
macspoof = true
nothing changed...
I forgot to mention what Dan DID mention, go to
http://www.ovirt.org/Vdsm_Hooks
And look at the yum install vdsm-hook-macspoof part. Unless of course you
already did this.
-----Original Message-----
From: "Alexander Wels" <awels(a)redhat.com>
Sent: Tuesday, April 29, 2014 8:47am
To: users(a)ovirt.org
Cc: "Dan Kenigsberg" <danken(a)redhat.com>, richard.seguin(a)marisec.ca
Subject: Re: [ovirt-users] IP forwarding... Cannot access guest IP
On Tuesday, April 29, 2014 01:35:08 PM Dan Kenigsberg wrote:
> On Tue, Apr 29, 2014 at 06:33:14AM -0400, richard.seguin(a)marisec.ca wrote:
> > Hi Dan,
> >
> > Yes I am an ovirt user. Basically, I am running into an issue running
> > xen
> > inside of kvm. Our scenario is that this is lab environment, and we
> > enjoy the luxury of spinning up kvm instances (as opposed to installing
> > on bare metal each time we need something). Our product uses Xen, and we
> > are pretty much stuck with it for the time being.
> >
> > I think what I am running into is a double bridge issue... Xen has a
> > bridge, and so does kvm obviously. I am able to ping dom0 (which is
> > just
> > the bridge itself) on Xen from the outside world, but I am not able to
> > ping udom... and... udom doesn't have access out either. When I was
> > using vmware, I enabled promisc mode on the virtual switch, and this
> > solution worked fine...
> >
> > If we ignore the types of technology that I am using, and just focus on
> > the networking, what would I be looking at as possibilities? Or... a
> > better question would be, does ovirt have a promiscuous flag somewhere
> > that I can set?
>
> I cannot say that I understand your setup, but if you have nested
> virtuallization (such as a Xen udom) you may experience ovirt's
> no-mac-spoofing rule: by default we disallow our VMs to emit traffic
> that has different mac address from the one assigned by oVirt.
>
> To avoid this, follow http://www.ovirt.org/Vdsm_Hooks#Installing_a_hook
> and report if that's the issue.
If the mac address is the issue wouldn't it be easier for him to just edit
the VM and in custom properties set macspoof to true?
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
2:01 a.m.
On Tue, Apr 29, 2014 at 05:11:57PM -0400, richard.seguin(a)marisec.ca wrote:
All of the other hypervisors that I am reading about allows for
promiscuous mode to be turned on at the host level... Do we have anything like that?
Would you confirm that once you have set macspoof=true, libvirt's domxml
for the relevant VM has lost its <filterref> element? (virsh -r dumpxml
would verify that)
This should allow you to ping out of the Xen guest outside of the KVM
host. If it doesn't, we'd have to debug this to understand what drops
your packets.
I'm not quite sure what you mean by "promiscuous mode". What VMWare
calls promiscuous mode is not unlike oVirt's port mirroring, but I'm not
convinced that this is what you are looking for.
Dan.
3:15 a.m.
Dan,
I knew that something didn't quite make sense when I tried this earlier today.
I'm glad that I set this up on my home lab, because I got it working using the advice
that you folks provided. Now that I know that this is a viable solution, I can go back
and start learning this correctly, from the beginning.
Thank you :)
Richard Seguin
-----Original Message-----
From: "Dan Kenigsberg" <danken(a)redhat.com>
Sent: Tuesday, April 29, 2014 7:01pm
To: richard.seguin(a)marisec.ca
Cc: awels(a)redhat.com, users(a)ovirt.org
Subject: Re: [ovirt-users] IP forwarding... Cannot access guest IP
On Tue, Apr 29, 2014 at 05:11:57PM -0400, richard.seguin(a)marisec.ca wrote:
All of the other hypervisors that I am reading about allows for
promiscuous mode to be turned on at the host level... Do we have anything like that?
Would you confirm that once you have set macspoof=true, libvirt's domxml
for the relevant VM has lost its <filterref> element? (virsh -r dumpxml
would verify that)
This should allow you to ping out of the Xen guest outside of the KVM
host. If it doesn't, we'd have to debug this to understand what drops
your packets.
I'm not quite sure what you mean by "promiscuous mode". What VMWare
calls promiscuous mode is not unlike oVirt's port mirroring, but I'm not
convinced that this is what you are looking for.
Dan.
3859
days inactive
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11 comments
3 participants
participants (3)
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richard.seguin＠marisec.ca