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What Docker Means For VMware, Cloud
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Laurianne
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Laurianne,
User Rank: Author
6/19/2014 | 3:48:12 PM
Re: Online Migration of Containers works
Charlie, what do you make of the security questions being asked around containers in the past few days? Was this a big topic in thre halls at Structure conference?
Charlie Babcock
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Charlie Babcock,
User Rank: Author
6/16/2014 | 3:13:27 PM
Re: Online Migration of Containers works
Good point, Neuroserve. I think it should be possible to move containers around among like hosts, increasing server utilization and energy efficiency. Just because we're not there yet doesn't mean we won't get there. In some ways, containers should be easier to migrate than VMs. But it will help if there is one management system to do both.
neuroserve
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neuroserve,
User Rank: Apprentice
6/14/2014 | 2:45:59 AM
Online Migration of Containers works
You write: "Workloads can be moved around while running to maximize utilization of servers -- containers cannot."

That is probably true for the current state of Docker containers. Live migration of OpenVZ containers works for a very long time already. If you have a recent Linux kernel you probably have the patches from CRIU (criu.org) and should be able to do "checkpoint and restore" with "normal" containers, as well. If you use ploop for your container images, your live migrations can be very fast. I'm looking forward to see criu and ploop used with docker. But with Docker there seems to come a "doctrine", that favours short running containers instead of long running ones (hypervisor based VMs are also long running). Container = Application is the mantra here (ore more specific: One instance of an application is one container - just like Google does it).

Neuroserve
Charlie Babcock
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Charlie Babcock,
User Rank: Author
6/13/2014 | 6:27:06 PM
About that $10, Joshua...
By unlikely allies, I mean Red Hat, IBM and Rackspace, among others. For months, Red Hat has seen the value of Docker, worked closely with Docker Inc. and moved to get Docker containerization inserted into Open Stack through a PaaS approach in Project Solum. Meanwhile, IBM and Rackspace put their money down on Cloud Foundry, with its different approach to PaaS. Piston's Joshua McKenty even bet $10 that Red Hat would join Cloud Foundry by the end of the year. At DockerCon, all the movement was in the other direction. Rackspace CTO John Engates praised Project Solum from the podium. IBM cited Docker's efficiencies and Cloud Foundry announced it was a Docker backer too. Instead of Red Hat joining Cloud Foundry, it looks like Cloud Foundry members are trying to catch up with Red Hat. 
TeaPartyCitizen
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TeaPartyCitizen,
User Rank: Apprentice
6/13/2014 | 6:17:17 PM
It never would have been a big deal
If Unix and Linux had seperate name spaces per process by default when Unix was invented and had the ability to share name spaces with groups, containers would have never been a big deal. People would have always programmed like that and the paradigms and models would all be very mature by now. It's not like we needed the Higgs Bozon descovered inorder to develope this feature. I'm just saying it could have been done earlier. That said, containers will make a release engineer's eyes glow. I saw this when I first learned of them.
Charlie Babcock
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Charlie Babcock,
User Rank: Author
6/12/2014 | 4:32:57 PM
Containers below the radar of most systems management
Laurie, Kubernetes could be the next big thing in open source code. If we get a proliferation of Linux containers, The need to create, deploy and manage them will overwhelm IT because they'll be outside the view of virtual machine and physical systems management, Is Kubernetes up to the job?

 
Laurianne
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Laurianne,
User Rank: Author
6/12/2014 | 12:58:57 PM
Kubernetes
I had not heard of Kubernetes befire this week, and I'm guessing many people had not heard of Docker. Charlie brings some useful context to why containers have quickly become a polarizing topic in cloud.


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