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Re: [atomic-devel] Running VMs in Openshift

On 22.03.2017 04:49, Karanbir Singh wrote:
> On 21/03/17 16:45, Stef Walter wrote:
>> One of the cool things you can do when implementing integration testing
>> is staging the test dependencies using an OCI image. And scheduling
>> integration tests in Openshift is also nice.
>> For tests that integrate a full operating system, you need to start up
>> one or more VMs running that operating system. Tests then interact with
>> those VMs.
>> It's easy to run VMs from inside of a privileged container that contains
>> /dev/kvm. But I want to be able to run full operating system integration
>> tests on an Openshift cluster without enabling privileged containers on
>> all nodes.
>> So I've been playing with this, and hacked together:
>> https://github.com/stefwalter/oci-kvm-hook
>> This allows use of KVM inside any container running on a system where
>> the hook is installed. The use of a hook for this is purely pragmatic.
>> A far better solution would be to change kubelet to have a --enable-kvm
>> option ... similar to the --experimental-nvidia-gpus support I see there
>> [1]. But since changes into kubernetes and then Openshift have a really
>> long lead time, this lets us play with this before hand.
>> Stef
>> [1] https://kubernetes.io/docs/admin/kubelet/
> What would the network layer look like here ?

QEMU socket with multicast [0] works on my initial testing. I need to
try it out under proper load (many thousands of instances a day) ... but
seems promising.


[0] https://people.gnome.org/~markmc/qemu-networking.html

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