Proxy for HPC

[sujit-jadhav]

@lwilson and @j0hnL ,
Currently Omnia core and control plane does not support public connectivity via proxy. Recently we have made changes in our lab and everything is under private network. Any node wants to reach internet, it has to go via proxy, we are hitting many issues due to this. I would like to know how valid and useful this scenario? Does HPC uses allow internet access only through proxy?

[lwilson]

@sujit-jadhav I think this is a good point, many systems have to make connections via proxy. Additionally, many HPC systems have their compute nodes hidden behind the manager node, which does rich-rule based port forwarding and masquerading to handle requests. Omnia should be able to handle these networking situations.

I think the most common scenario would be to allow the control plane to connect to the public internet (via proxy, if necessary), and then have the resource pool connect via the control plane (which would handle the port forwarding and masquerade).

                 |
                 |  public connection (via proxy)
                 |
        ------------------
        |  control plane |
        ------------------
                 |
                 | private network (IP requests port forwarded/masqueraded via control plane)
                 |
-------------------------------------
|                                   |
|          resource pool            |
|                                   |
-------------------------------------