I am planning the system architecture around a ceph cluster [my first!].
While resources for setting up the basic cluster (MON+MDS+OSD) are
readily available*, I haven't come across anything outlining production
recommendations for a RADOS Gateway Cluster. Specifically;
1. Is it preferable to run the RADOS Gateway on a MDS machine [for
latency issues], or should the Gateway run on seperate hosts/VMs than
the ODS/MON/MDS servers?
2. I've seen reference that multiple RADOS Gateway servers can be setup
as a cluster "to scale". Is this possible? Is there an
example/documentation for this? Is it just 2 standalone gateways with a
load balancer in front?
My assumption is to provision a dedicated machine for the RADOS Gateway.
I'd treat this machine as a "front end proxy/caching server" meaning it
would have a lot of RAM for varnish/nginx and a low latency, high
throughput network connection to the ODS/MDS machines as well as one to
the public network.
Any thoughts and suggestions are welcome. Eventually I'd like to release
a whitepaper of this setup if we can hit the budget to actually implement ;)
~ Brice
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