Hey folks, So I've been through a number of POC and smaller deployment clusters since Folsom, but I'm now working on one that should be a good bit larger and have a much greater need for HA. The diagrams that I originally drew up that seemed reasonable a few months ago are in conflict with a lot of the reference architectures I'm seeing now, and I could really use some feedback on people actually doing this in production right now.
The architecture I intended to deploy was this: 2 HAProxy nodes to load balance active / active APIs and Horizon 2 HAProxy nodes to load balance a Galera Mysql cluster 2 Control nodes with all API services 3 Galera / MySQL nodes 3 MongoDB nodes running replica sets for Ceilometer 2 Neutron Nodes running Active / Passive L3/DHCP/LBaaS agents (hopefully active active L3 in Juno) 3 Ceph-Mon nodes 3 Ceph-OSD nodes (hosting Cinder, Glance, and potentially instance storage) X number of compute nodes depending on the requirement The reference architectures I'm seeing out of Redhat and Mirantis among others seem to like putting all of the above eggs except the Storage into 3 identical baskets. This just feels bad and painful to me and like it would lead to very badly performing everything. Am I totally just stuck in the past with how I'm thinking of setting all this up? Any and all feedback would be greatly appreciated Thanks! -Erik
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