[eropple]

I'm in a similar place with regards to Docker versus Rocket, but I'm not a big fan of CoreOS right now. I think it's got some real neat ideas, but in my experience with it "everything in a container" is as yet unmanageable at scale. And I'm very uncomfortable with signing over the entirety of my infrastructure to a small company whose--venture-backed, which makes me extremely uncomfortable when it comes to running my platform and infrastructure--goals are not clear to me. (I have less of a beef with, say, Chef, with much more of a history and more generally understood goals and a business model, but I'm still not super comfortable with them, either.)

I also don't much care for etcd, because IMO Zookeeper's rep for complexity is hugely overblown and most folks end up re-implementing Zookeeper poorly in etcd, but that's a side thing.

All that said, I agree with you that Rocket is a much, much better idea and design, and that despite my misgivings about their corporate goals CoreOS is a way more serious project from a security standpoint than Docker. I'm excited to see this, if only because I think Rocket will pick up some dV from this.

[iyn]

I believe that the current state of containers is just the beginning of the trend and containers development. IMO, containerization simplifies security, fast deployment cycles, dependency problems and improves some other things. There are problems, of course and things that are not solved in a containers world. The obvious thing is a persistent storage - we don't have a good solution to this that uses containers. There are "patterns" (like, for example: running specialized database container and sharing "volume" with the host), but it's just a hacky trick and not a solution. I really hope it'll be solved. Using AWS RDS (Amazon Database in the Cloud) and S3 is kind of a "workaround" (pretty good workaround, to be honest), but not everybody wants to use AWS.

I really like Ansible and I believed that Ansible could help with Docker deployments (http://www.ansible.com/docker), but at the moment I think that using Dockerfiles is faster and simpler. I'm still using Ansible for Vagrant provisioning, but don't need it for setting up production/ci anymore. Sure, Ansible/Chef/Puppet will be probably on the market and used by some big players, but I'd be very surprised if we won't see big shift into containers for most of the technology companies. Being faster, more productive and cost effectiveness (related: https://www.youtube.com/watch?v=xK0njkATf84) are good enough arguments imo.