[PVE-User] 2 host cluster, direct link: best configuration?

[GM]

I'd personally use option 1, dedicated nic(s) or vlans for LAN and Corosync
network.Then I'd use the dedicated 10G link only for storage replication.
All 3 networks would be setup on different network subnets. Storage
replication uses "migration network" for the replication, so you could
setup that on the dedicated 10G link, so that it does not interfere with
the corosync/lan traffic. Migration network can be setup either via the
datacenter.cfg or via the web gui (Datacenter -> Options -> Migration
settings).

On Sat, 19 Feb 2022 at 16:10, Marco Gaiarin <gaio at lilliput.linux.it> wrote:

>
> We have to setup a little 2 node cluster, with symmetrical nodes, using
> replication.
>
> For that, we have added a 10G interface, and setup a direct link between
> the
> two server.
>
> But how is better to setup the link? Some ideas:
>
> 1) another network, different from LAN
>
>   pro: simple
>   cons: replica happen only on cluster/corosync interface? So i have to
>     setup corosync on direct link addresses?
>
>
> 2) ip override; eg LAN interfaces are 10.37.5.21/21 and 10.37.5.22/21;
>  direct link interfaces are 10.37.5.21/32 and 10.37.5.22/32, and an
>  explicitly route to  other host
>
>  pro: if direct link go down, we can simple tear down interfaces
>  cons: no auto, interfaces have to tear down manually
>
>
> 3) setup a bridge around LAN and direct link cable, setup STP and leave the
>  switches all the work.
>
>  This config suggested, more or less, by:
>         https://pve.proxmox.com/wiki/Full_Mesh_Network_for_Ceph_Server
>
>
> Thanks.
>
> --
>   Io chiedo quando sara` che l'uomo potra` imparare
>   a vivere senza ammazzare e il vento si posera`        (F. Guccini)
>
>
>
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