HA Cluster with multiple public IPs

[jHorrocks]

I have read many posts in this forum regarding clustering and HA but my configuration is slightly different for business reasons, I need each VM/Container on its own IP and I am confused how to set this up.

I am only in the design stage so testing is not an option right now so just the theory behind what to do is what I am looking for.

I am designing a 3 node proxmox environment for HA:

pveProduction1
location: datacenter 1
proxmox public IP: 1.1.1.100 (example)
VM1 public IP: 1.1.1.101 - hosting www.website1.com
VM2 public IP: 1.1.1.102 - hosting www.website2.com
VM3 public IP: 1.1.1.103 - hosting www.website3.com

pveProduction2
location: datacenter 2
proxmox public IP example: 2.2.2.100 (example)
VM1 public IP: 2.2.2.101 - hosting www.website1.com
VM2 public IP: 2.2.2.102 - hosting www.website2.com
VM3 public IP: 2.2.2.103 - hosting www.website3.com

pveOffice1
location: my office
proxmox public IP example: 3.3.3.100 (example)
VM1 public IP: 3.3.3.101 - hosting www.website1.com
VM2 public IP: 3.3.3.102 - hosting www.website2.com
VM3 public IP: 3.3.3.103 - hosting www.website3.com

All the above servers will be hosted at different hosting datacenters so cannot ask them to subnet or route IPs etc...

pveProduction1 will be the main server so if someone goes to www.website1.com it will point to public IP 1.1.1.101 (VM1) but if this VM or the proxmox pveProduction1 server goes down and pveProduction2 takes over, then the new IP for www.website1.com is now 2.2.2.101.

So my question is, how do I make sure www.website1.com will resolve from public IP 1.1.1.101 to 2.2.2.101? (VM1 on pveProduction2)

Any guidance on this would be greatly appreciated, thanks in advance.

 

[rason]

Check out this thread on serverfault, there are multiple possible solutions discussed out there: https://serverfault.com/questions/60553/why-is-dns-failover-not-recommended

 

[jHorrocks]

Thanks buddy, this is great info, now I understand.