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You have hit the nail on the head. The thing people want in the real world is improved workflow. In the real world, everyone wants infrastructure to have the same sexy qualities: automated deployment (CD/CI), automated scaling, automated failover/high availability, automated service discovery (read: functional service topology dependency resolution), security, resource and capacity planning support, real time least-cost-overhead provider selection for third party infrastructure providers meeting some disparate set of performance requirements, etc. Unfortunately, it's not an easy problem area to deliver a one size fits all solution to. Docker doesn't really have most of that stuff in scope yet, even vaguely. Actually, it seems to have a really weird scope: it wants to wrap different LXC implementations and other container-style unix environments (potentially supporting non-Linux platforms) but doesn't want to deal with managing the host systems themselves, having - kind of, for practical reasons (though not entirely!) - outsourced this to CoreOS (ie. some particularly specific configuration of a Linux host system). Whether all of this recent Redhat/Google docker bandwagon jumping will amount to any real solution remains to be seen .. Google AFAIK effectively runs its services on fat clusters made of commodity hardware, organized in to segments ('cells'), running highly customised Linux distributions, and so does Redhat where HA is required. I'm pretty familiar with these configurations as I do this myself. So will we ever see meaningful support for other OSs? Other distros? Physical systems via PXE to support these clusters? Hypervisor guests managed with the same developer and operations workflow? My wager is not soon, at least in a manner that everyone agrees on... Google will keep doing its thing (using its unlimited supply of internal, world-class nerds to deliver and manage services on their custom OS in a custom way because saving 1/2c a month per machine pays ten world class nerd salaries at their scale), Redhat will keep doing its thing (selling prebuilt systems at expensive prices that still comfortably undercut the likes of IBM, pretending they are manageable, but actually rejigging the whole infrastructure every system release leaving little in the way of realistic upgrade paths without expensive consulting) and you and I will be left wondering where that magical docker solution went that everyone was talking about in early 2014. |
Here are a couple of notes..
Deployment manager - https://developers.google.com/deployment-manager/
Saltstack integration - https://www.youtube.com/watch?v=0dOXbhenFl0