anyone :) On 3 May 2015 at 13:49, Andrija Panic <andrija.pa...@gmail.com> wrote:
> Hi guys, > > I was wondering if someone experienced would be kind to share their > opinion on folowing subject - since I'm 95% clear with design/ho stuff > works, but again missing some info - after I have done my RTFM many times, > and I had also check in details ShapeBlue's diagrams on Networking Deep > Dive etc. > > Subject: Management vs Secondary Storage connectivity dependencies > > > Current setup: > > - We start with 1 POD, 1 Cluster > - All KVM hosts are directly attached to mgmt, primary storage, and > secondary storage networks/vlans (via 3 dedicated NICs/vlans - each one on > a separate/non-overlapping /16 network), so no rouing required for any KVM > host to reach any resource on all of these 3 networks... > - Zone-wide Primary Storage (CEPH) - again, directly attached to all KVM > hosts - this means all future PODs will be also directly attached to > CEPH/Primary Storage Net - no routing... > - NFS Zone-Wide Secondary Storage (of course) > > > For Primary Storage traffic/network I dont have any questions - I > understand how stuff works (thx for latest docs and ShapeBlue blogs) - > except possible zone-wide vs cluster-wide discussion... > > > > Questions that I have - Secondary Storage network...: > > > 1. Since all KVM hosts are directly attached (via dedicated > interface) to both MGMT and SEC storage network - is there any routing that > needs to be done on the L3 switch ? My understanding not, but some > confirmation would be nice please. > 2. What about when we have multiple PODs/Clusters - does it make any > difference versus 1 single POD/Cluster? I understand there needs to be > routing connectivity over L3 switch between different Management networks > of each POD, but what about storage? I expect I would need to attach/trunk > Secondary Storage Net to all KVM hosts in all PODs... ? > 3. What other networks (except MGMT) does Management server needs to > be connected to ? I understand there needs to be eather routed or dirrect > (dedicated NIC) connection to Secondary Storage network - at least during > ACS deployment, during sys template preseed on NFS ? > 4. Is Secondary Storage network required for anything else on MGMT > servers, after the ACS template preseed/provisioning ? I understand not, > but again would benefit some confirmation please. > 5. Finally - in terms of pure ACS aspect - is there a difference > between KVM hosts being connected directly to Secondary Stor Net (via > dedicated NIC/trunked) or using routing - in other words, can we say that > something like folowing is true: If the KVM host doesnt have direct > attached network to it self (primary, secondary) = it will used Management > Net gateway to try to reach its destination (Pimary/Secondary storage for > example) meaning it will use routing for this. > 6. What is really Secondary Storage Network Gateway used for in ACS ? > > > I apologize for having long questions - I just try to understand > connectivity dependencies between Sec and Mgmt networks and will be really > thankfull for clarifying these... > > Regards, > -- > > Andrija Panić > -- Andrija Panić
