OVS on many servers

[tincboy]

I've a cluster of 40 Proxmox nodes and I want to start offer private network to my clients,
Each client of me may have few VMs on different nodes, and it's not static, they may add/remove VMs.
My question is if I want to setup OVS based private networking it's necessary to add GRE for each two servers? this way I will have difficulties adding/removing new Proxmox nodes to all servers' configurations.

 

[spirit]

My question is if I want to setup OVS based private networking it's necessary to add GRE for each two servers? this way I will have difficulties adding/removing new Proxmox nodes to all servers' configurations.

vlans ?

or if you don't have layer2 between your hosts, indeed, gre/vxlan/....

 

[tincboy]

My servers are all connected via layer2 switches, but I can't add so many vlans on them.

 

[tincboy]

vlans ?

or if you don't have layer2 between your hosts, indeed, gre/vxlan/....

So as I've L2 connectivity between all nodes, how can I avoid establishing GRE between all pairs of servers?