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From Christoffer Pedersen <v...@vrod.dk>
Subject Re: Cloud0 interface disappeared after reboot
Date Wed, 04 Jul 2018 11:50:54 GMT
Hi guys,

I discovered that cloud0 was still present in OVS by using the command
ovs-vsctl show. There was a lot of interfaces with "no such file or folder"
errors. Decided to trash the entire db and configure from new. So far so
good... After the manual creation everything seems to go a lot smoother
again. I think I will stick to having this interface manually defined in
/etc/network/interfaces going forward.

Thanks!
Chris

On Wed, Jul 4, 2018 at 1:38 PM, Andrija Panic <andrija.panic@gmail.com>
wrote:

> HI Chris,
>
> here is output (and you probably have it from your other hypervisors)
>
> root@ix1-c4-2:~# ifconfig cloud0; brctl show cloud0
> cloud0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00
>           inet addr:169.254.0.1  Bcast:0.0.0.0  Mask:255.255.0.0
>           UP BROADCAST MULTICAST  MTU:1500  Metric:1
>         .....
>
> bridge name     bridge id               STP enabled     interfaces
> cloud0          8000.000000000000       no
>
> So i guess just simple create bridge (i.e. something like:      brctl addbr
> cloud0 && ifconfig cloud0 up && ifconfig cloud0 169.254.0.1 netmask
> 255.255.0.0 up ...... can be added to rc.local or you can configure it more
> proper way, via config files just like any other interface...)
>
> Best
>
> On Wed, 4 Jul 2018 at 12:21, Dag Sonstebo <Dag.Sonstebo@shapeblue.com>
> wrote:
>
> > Hi Chris,
> >
> > In short – you wouldn’t link it to any interface – you would just create
> > the bridge and also possibly assign a 169… IP address to it. Take a look
> at
> > my 2016 blog post -
> > https://www.shapeblue.com/networking-kvm-for-cloudstack/ - it’s slightly
> > out of date but as you can see back then I did some manual cloud0
> > configuration as a workaround.
> >
> > Regards,
> > Dag Sonstebo
> > Cloud Architect
> > ShapeBlue
> >
> > On 04/07/2018, 11:11, "Christoffer Pedersen" <vrod@vrod.dk> wrote:
> >
> >     Hi Dan,
> >
> >     Sorry, I might have missed this conversation, it would be great if
> you
> > could tell me the name of that topic.
> >
> >     I am a little unsure how I would create the cloud0 interface. Would I
> > bridge it to the lo0 interface? Would you have an example? :)
> >
> >     Thank you!
> >     Chris
> >
> >     Sent from my iPhone
> >
> >
> > Dag.Sonstebo@shapeblue.com
> > www.shapeblue.com
> > 53 Chandos Place, Covent Garden, London  WC2N 4HSUK
> > @shapeblue
> >
> >
> >
> > > On 4. Jul 2018, at 11:03, Dag Sonstebo <Dag.Sonstebo@shapeblue.com>
> > wrote:
> >     >
> >     > Hi Christopher,
> >     >
> >     > I think we discussed my KVM networking blog post in an earlier
> > thread so I assume you’ve had a read of that – I’m about to revisit this
> > and re-issue the blog post in the coming weeks so keep an eye on it.
> >     >
> >     > Wrt immediate fix – have you tried simply manually creating the
> > cloud0 bridge and just bring it up on bootup? Is this picked up by VMs?
> >     >
> >     > Regards,
> >     > Dag Sonstebo
> >     > Cloud Architect
> >     > ShapeBlue
> >     >
> >     > On 04/07/2018, 08:42, "Christoffer Pedersen" <vrod@vrod.dk> wrote:
> >     >
> >     >    Hi Andrija,
> >     >
> >     >    No luck after trying that unfortunately. Does anyone know what
> > process
> >     >    creates the cloud0 interface? This is really frustrating since
> > it's now
> >     >    happening on 2 hosts that I am running and I don't really know
> > where to
> >     >    look.
> >     >
> >     >    On Tue, Jul 3, 2018 at 5:27 PM, Andrija Panic <
> > andrija.panic@gmail.com>
> >     >    wrote:
> >     >
> >     >> I vaguely remember that cloud0 were lazy provisioned/started...
> did
> > you
> >     >> start VR on that host, does it trigger cloud0 creation ?
> >     >>
> >     >> Cheers
> >     >>
> >     >
> >     > Dag.Sonstebo@shapeblue.com
> >     > www.shapeblue.com
> >     > 53 Chandos Place, Covent Garden, London  WC2N 4HSUK
> >     > @shapeblue
> >     >
> >     >
> >     >
> >     >>> On Tue, 3 Jul 2018 at 16:34, Christoffer Pedersen <vrod@vrod.dk>
> > wrote:
> >     >>>
> >     >>> Hi all,
> >     >>>
> >     >>> Currently doing some POC'ing in a nested environment. Running the
> > latest
> >     >>> 4.11.1 with Ubuntu 16.04 LTS. I am using openvswitch to connect
> the
> >     >>> networks.
> >     >>>
> >     >>> So far everything has worked much better than the 4.11 where I
> had
> >     >>> countless of issues. However, after rebooting my hypervisor, the
> > cloud0
> >     >>> interface is no longer to be found. Have anyone run into this?
I
> > ran into
> >     >>> this issue too in 4.11.
> >     >>>
> >     >>> Hoping that someone might have an idea where to look, logs doesnt
> > show
> >     >>> anything in regards to the cloud0 interface.
> >     >>>
> >     >>> --
> >     >>> Thanks,
> >     >>> Chris pedersen
> >     >>>
> >     >>
> >     >>
> >     >> --
> >     >>
> >     >> Andrija Panić
> >     >>
> >     >
> >     >
> >     >
> >     >    --
> >     >    Thanks,
> >     >    Chris pedersen
> >     >
> >     >
> >
> >
> >
>
> --
>
> Andrija Panić
>



-- 
Thanks,
Chris pedersen

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