On Fri, Jun 29, 2018 at 12:24 PM, Stefano Zappa <[email protected]> wrote:
> Hi Alex, > I have evaluated this approach using the latest version of oVirt Node. > > In principle I would like to follow the guidelines of oVirt development > team, and adopt its best practices, trying to limit excessive > customizations. > > So I installed oVirt Node on 3 hosts and I manually configured the two > additional interfaces for the point-to-point interconnections on which then > I configured Gluster. > This was done very easily, and it works! > Sounds like an interesting item for ovirt.org blog! Y. > > I know that SDN is supported by oVirt, even if by default it is bridging > to the outside. > I have no experience with the SDN, but I realized that the VxLAN or maybe > Geneve was the way to go, and now I also have your confirmation. > Creating Geneve L3 point-to-point tunnels between the nodes, on which then > configure an L2 overlay network shared by oVirt pool hosts and on which > then move all internal oVirt communications. > > In first analysis this intervention seems structural, not trivial, I think > it would be better to evaluate it carefully, and if interesting, write a > best practice or better integrate the functionality in the solution. > At the end the system must be stable and above all upgradable with > traditional procedures. > > Stefano. > > > > > Stefano Zappa > IT Specialist CAE - TT-3 > Technical Department > > Industrie Saleri Italo S.p.A. > Phone:+39 0308250480 > Fax:+39 0308250466 > > This message contains confidential information and is intended only for > [email protected], [email protected], [email protected], > [email protected], [email protected], [email protected], > [email protected]. If you are not [email protected], > [email protected], [email protected], [email protected], [email protected], > [email protected], [email protected] you should not disseminate, > distribute or copy this e-mail. Please notify [email protected] > immediately by e-mail if you have received this e-mail by mistake and > delete this e-mail from your system. E-mail transmission cannot be > guaranteed to be secure or error-free as information could be intercepted, > corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. > Stefano Zappa therefore does not accept liability for any errors or > omissions in the contents of this message, which arise as a result of > e-mail transmission. If verification is required please request a hard-copy > version. > ________________________________________ > Da: Alex K <[email protected]> > Inviato: giovedì 28 giugno 2018 21:34 > A: Stefano Zappa > Cc: Yaniv Kaul; devel; [email protected] > Oggetto: Re: [ovirt-users] Re: [ovirt-devel] Re: oVirt HCI point-to-point > interconnection > > Hi, > > Network virtualization is already here and widely used. I am still not > sure what is the gain of this approach. You can do the same with VxLANs or > Geneve. And how do you scale this? Is it only for 3 node clusters? > > Alex > > On Thu, Jun 28, 2018, 11:47 Stefano Zappa <[email protected]<mailto: > [email protected]>> wrote: > Hi Yaniv, > no, the final purpose is not to save a couple of ports. > > The benefit is the trend to convergence and consolidation of the > networking, as already done for the storage. > The external interconnection is a critical element of the HCI solution, a > configuration without switches would give more soundness and more > independence. > > If we think about HCI as the transition of IT infrastructure from > hardware-defined to software-defined, the first step was virtualization of > the servers, the second step was storage virtualization, the third step > will be virtualization of networking. > > Of course this also has an economic benefit, reduce the total cost of > ownership and traditional data-center inefficiencies. > > We suppose a very traditional and simple external uplink, we can use the > interfaces integrated into the motherboard. > This will not be critical for the integrity of the our HCI solution, this > will not require broad bandwidth and low latency, this will be used > exclusively to interconnect the solution with the outside world, then with > a traditional ethernet switch. > > We suppose to give more attention to the point-to-point interconnection of > the three nodes, using 100 or 200 GbE cards for direct interconnection > without switches. > The hypothetical purchase of these 3 cards will not be cheaper, sure, but > it will be twenty times less than introducing expensive switches that will > certainly have more ports than necessary. > > Thanks for your attention, > Stefano. > > > > > Stefano Zappa > IT Specialist CAE - TT-3 > Technical Department > > Industrie Saleri Italo S.p.A. > Phone:+39 0308250480 > Fax:+39 0308250466 > > This message contains confidential information and is intended only for > [email protected]<mailto:[email protected]>, [email protected]<mailto:sabos > [email protected]>, [email protected]<mailto:[email protected]>, > [email protected]<mailto:[email protected]>, [email protected]<mailto:users@ > ovirt.org>. If you are not [email protected]<mailto:[email protected]>, > [email protected]<mailto:[email protected]>, [email protected]<mailto: > [email protected]>, [email protected]<mailto:[email protected]>, > [email protected]<mailto:[email protected]> you should not disseminate, > distribute or copy this e-mail. Please notify [email protected]< > mailto:[email protected]> immediately by e-mail if you have > received this e-mail by mistake and delete this e-mail from your system. > E-mail transmission cannot be guaranteed to be secure or error-free as > information could be intercepted, corrupted, lost, destroyed, arrive late > or incomplete, or contain viruses. Stefano Zappa therefore does not accept > liability for any errors or omissions in the contents of this message, > which arise as a result of e-mail transmission. If verification is required > please request a hard-copy version. > ________________________________________ > Da: Yaniv Kaul <[email protected]<mailto:[email protected]>> > Inviato: mercoledì 27 giugno 2018 16:20 > A: Stefano Zappa > Cc: Sahina Bose; Sandro Bonazzola; [email protected]<mailto:[email protected]>; > [email protected]<mailto:[email protected]> > Oggetto: Re: [ovirt-devel] Re: [ovirt-users] oVirt HCI point-to-point > interconnection > > On Wed, Jun 27, 2018 at 11:26 AM, Stefano Zappa <[email protected]< > mailto:[email protected]><mailto:[email protected]<mailto: > [email protected]>>> wrote: > The final purpose is strictly targeted to your HCI solution with 3-node > gluster replication. > > Can you explain to me what the benefit is? You need a switch anyway (for > uplink), so the 'cost saving' is that you can use a 4 port (?) switch and > do not need 6 ports? > Y. > > > > > > Stefano Zappa > IT Specialist CAE - TT-3 > Technical Department > > Industrie Saleri Italo S.p.A. > Phone:+39 0308250480 > Fax:+39 0308250466 > > This message contains confidential information and is intended only for > [email protected]<mailto:[email protected]><mailto:[email protected] > <mailto:[email protected]>>, [email protected]<mailto:sbo > [email protected]><mailto:[email protected]<mailto:[email protected]>>, > [email protected]<mailto:[email protected]><mailto:[email protected] > <mailto:[email protected]>>, [email protected]<mailto:[email protected] > ><mailto:[email protected]<mailto:[email protected]>>, [email protected]<mailto: > [email protected]><mailto:[email protected]<mailto:[email protected]>>. If you > are not [email protected]<mailto:[email protected]><mailto:sabose@ > redhat.com<mailto:[email protected]>>, [email protected]<mailto:sbo > [email protected]><mailto:[email protected]<mailto:[email protected]>>, > [email protected]<mailto:[email protected]><mailto:[email protected] > <mailto:[email protected]>>, [email protected]<mailto:[email protected] > ><mailto:[email protected]<mailto:[email protected]>>, [email protected]<mailto: > [email protected]><mailto:[email protected]<mailto:[email protected]>> you > should not disseminate, distribute or copy this e-mail. Please notify > [email protected]<mailto:[email protected]><mailto: > [email protected]<mailto:[email protected]>> immediately by > e-mail if you have received this e-mail by mistake and delete this e-mail > from your system. E-mail transmission cannot be guaranteed to be secure or > error-free as information could be intercepted, corrupted, lost, destroyed, > arrive late or incomplete, or contain viruses. Stefano Zappa therefore does > not accept liability for any errors or omissions in the contents of this > message, which arise as a result of e-mail transmission. If verification is > required please request a hard-copy version. > ________________________________________ > Da: Sahina Bose <[email protected]<mailto:[email protected]><mailto: > [email protected]<mailto:[email protected]>>> > Inviato: mercoledì 27 giugno 2018 10:15 > A: Sandro Bonazzola > Cc: Stefano Zappa; Simone Tiraboschi; [email protected]<mailto:users@ > ovirt.org><mailto:[email protected]<mailto:[email protected]>>; > [email protected]<mailto:[email protected]><mailto:[email protected]<mailto: > [email protected]>> > Oggetto: Re: [ovirt-users] oVirt HCI point-to-point interconnection > > The point to point interconnect is something we have not explored - I > think this limits the solution from scaling out to more nodes. > > On Wed, Jun 27, 2018 at 1:22 PM, Sandro Bonazzola <[email protected] > <mailto:[email protected]><mailto:[email protected]<mailto:sbonazz > [email protected]>><mailto:[email protected]<mailto:[email protected] > ><mailto:[email protected]<mailto:[email protected]>>>> wrote: > Simone, Sahina, can you please have a look? > > 2018-06-07 9:59 GMT+02:00 Stefano Zappa <[email protected]<mailto: > [email protected]><mailto:[email protected]<mailto: > [email protected]>><mailto:[email protected]<mailto:Stefano > [email protected]><mailto:[email protected]<mailto:Stef > [email protected]>>>>: > > Good morning, > I would like to kindly ask you a question about the feasibility of > defining a point-to-point interconnection between three ovirt nodes. > > Initially with the idea of optimizing the direct communications between > the nodes and especially the gluster communications, and so it would seem > quite easy, then evaluating a more complex configuration, assuming to > create an overlay L2 network on the three L3 point-to-point, using > techniques like geneve, of which at the moment I have no mastery. > > If the direct routing of three nodes to interconnect the public network > with the private overlay network was not easily doable, we could leave the > private overlay network isolated from the outside world and connect the VM > hosted engine directly to the two networks with two adapters. > > This layout with direct interconnection of the nodes without switches and > a shared L2 overlay network between the nodes may in future be contemplated > in future releases of your HCI solution? > > Thank you for your attention, have a nice day! > > Stefano Zappa. > > > [cid:609f1f14-f74e-489f-b86d-08647efc6d1c] > > > > > Stefano Zappa > > IT Specialist CAE - TT-3 > > > > Industrie Saleri Italo S.p.A. > > Phone: +39 0308250480 > Fax: +39 0308250466 > > > > This message contains confidential information and is intended only for > [email protected]<mailto:[email protected]><mailto:[email protected]<mailto: > [email protected]>><mailto:[email protected]<mailto:[email protected]><mailto: > [email protected]<mailto:[email protected]>>>, [email protected]<mailto:infra@ > ovirt.org><mailto:[email protected]<mailto:[email protected]>><mailto: > [email protected]<mailto:[email protected]><mailto:[email protected]<mailto: > [email protected]>>>, [email protected]<mailto:[email protected]><mailto: > [email protected]<mailto:[email protected]>><mailto:[email protected]<mailto: > [email protected]><mailto:[email protected]<mailto:[email protected]>>>. If you > are not [email protected]<mailto:[email protected]><mailto:[email protected] > <mailto:[email protected]>><mailto:[email protected]<mailto:[email protected] > ><mailto:[email protected]<mailto:[email protected]>>>, [email protected] > <mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>< > mailto:[email protected]<mailto:[email protected]><mailto:[email protected] > <mailto:[email protected]>>>, [email protected]<mailto:[email protected] > ><mailto:[email protected]<mailto:[email protected]>><mailto:[email protected] > <mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>> > you should not disseminate, distribute or copy this e-mail. 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