Red Hat Touts Linux Containers For Cloud - InformationWeek

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Red Hat Touts Linux Containers For Cloud
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Andrew Binstock
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Andrew Binstock,
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4/17/2014 | 4:04:38 PM
Re: Containers next big thing?
That's right. Dockers are a subset of true VMs. This makes them attractive for quick deploy esp. for developers with straightforward cloud apps, but they're not suitable for all VM use cases.
Charlie Babcock
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Charlie Babcock,
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4/17/2014 | 1:43:34 PM
Re: Containers next big thing?
Gregory396, Containers as Red Hat is using the term are specific to Unix systems and in its case, of course, Linux. I'm not sure what Citrix is doing in a similar vein with XenApp. I'd be cautious about saying hypervisor suppliers are dependent on hardware vendors for access to the cloud. Both AMD and Intel make it easier for hypervisors to get hardware services they need through virtualization hooks and shortcuts built into the chip. But hypervisor workloads re not literally dependent on hardware manufacturers to move into the cloud. Maybe that's not what you meant.
Charlie Babcock
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Charlie Babcock,
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4/17/2014 | 1:34:31 PM
RE: Is this really new?
CumuloNimbus, I guess the short answer is, yes, there's a lot new here. I don't blame you for a little skepticism and containers are an old idea. But Red Hat, in connection with Docker, is implementing them in a way that's useful for moving cloud workloads efficiently. See IDC analyst Al Hilwa's comments at the end of this column: Red Hat Linux Containers; Not Just Recycled Ideas

http://www.informationweek.com/cloud/platform-as-a-service/red-hat-linux-containers-not-just-recycled-ideas/d/d-id/1204530?piddl_msgid=210201&piddl_msgposted=yes#msg_210201 

 
Charlie Babcock
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Charlie Babcock,
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4/16/2014 | 2:18:01 PM
Why are containers described as "lightweight?"
The application in the container gets part of its operating system services from "user mode" libraries included in the container and part from the Linux kernel on the host server. The parameters in the container insure that the host kernel is a compatible one. Thus, the application doesn't need to carry the whole operating system with it as its transported into the cloud. And in theory, more containers can run on a host than virtual machines, due to this lighter weight of this configuration.
Charlie Babcock
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Charlie Babcock,
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4/16/2014 | 1:16:09 PM
Containers next big thing?
Red Hat President Paul Cormier Tues. pooh poohed notion that containers were competition for VMware. Next morning, Red Hat CTO Brian Stevens in Summit keynote calls Linux containers "the next phase of virtualization." That's not quite true. In some cases, containers could replace virtual machines for higher density operation on cloud hosts. They provide isolation similar to virtualization. But they don't pool and manage resources in the data center like virtualization.


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