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Multi-DC Install: Install Tips?


Have been reading through the documentation, have prepped quite a bit of hardware (2 full racks in each DC, 10G/40G uplinks), and have decided to take the plunge and setup Cloudstack on it.  It's destined to be a multi-data center install, but I think it would be best to start a DC at a time, obviously, unless there are considerations for this.

General setup is EX4200s, SRX240s, all local storage on hardware RAID-10 SSDs (except for a few high storage servers).  Some servers have mobo dual NICs (about half of these have quad NIC cards, tho), some have mobo quads, all have some type of remote management.

Have experience with virtualization long-term (vmWare/Proxmox/self-rolled KVM/LXC/Docker/Kubernetes), as well as the command line,

 * Any install tips?  Gotchas, or things to watch out for?
 * How much secondary storage is recommended per DC?
 * Would it be best to do a single location at a time, or to setup the
   management servers for all locations first and then proceed to build
   out each DC?
 * Any tips you have as a longer-term user?