Kernel development using linux containers (LXC ) ?

[Grzegorz Dwornicki]

As I said I use kvm and this question was just for sake of argument. Since
you ask I work with sockets ATM.
30 lip 2015 16:03 "nick" <xerofoify at gmail.com> napisał(a):

>
>
> On 2015-07-30 09:57 AM, Grzegorz Dwornicki wrote:
> > Yeah I've thought that hardware can be hard to program on UML
> > 30 lip 2015 14:48 "nick" <xerofoify at gmail.com> napisał(a):
> >
> Just so I known what area are you working in as this may help
> me find a better solution for you.
> Nick
> >>
> >>
> >> On 2015-07-30 08:47 AM, Grzegorz Dwornicki wrote:
> >>> What about UML? I'm using KVM but asking for the sake of argument.
> >>>
> >> I already stated that it works fine if your not doing hardware
> >> exact development like file systems or networking core.
> >> Nick
> >>> 2015-07-29 23:03 GMT+02:00 Manish Katiyar <mkatiyar at gmail.com>:
> >>>> On Wed, Jul 29, 2015 at 1:49 PM, Greg Freemyer <
> greg.freemyer at gmail.com>
> >> wrote:
> >>>>> On Wed, Jul 29, 2015 at 4:23 PM, Manish Katiyar <mkatiyar at gmail.com>
> >> wrote:
> >>>>>> On Wed, Jul 29, 2015 at 1:07 PM, Jeff Haran <Jeff.Haran at citrix.com>
> >> wrote:
> >>>>>>>> -----Original Message-----
> >>>>>>>> From: kernelnewbies-bounces at kernelnewbies.org [mailto:
> >> kernelnewbies-
> >>>>>>>> bounces at kernelnewbies.org] On Behalf Of Manish Katiyar
> >>>>>>>> Sent: Wednesday, July 29, 2015 11:51 AM
> >>>>>>>> To: kernelnewbies
> >>>>>>>> Subject: Kernel development using linux containers (LXC ) ?
> >>>>>>>>
> >>>>>>>> Hi,
> >>>>>>>>
> >>>>>>>> I've been playing and reading about control groups and linux
> >> containers
> >>>>>>>> recently and was wondering if there are any existing recipes on
> how
> >> to setup
> >>>>>>>> a kernel environment in containers. Google hasn't been helpful so
> >> far (or
> >>>>>>>> maybe I'm not searching properly).
> >>>>>>>>
> >>>>>>>> I've used VMs for dev in past (Qemu, uml etc.), but looks like it
> >> may be
> >>>>>>>> interesting to have it in containers. Given that they share they
> >> same OS image
> >>>>>>>> as host, I'm not sure if its possible without making the host OS
> >> crash.
> >>>>>>>>
> >>>>>>>> Any suggestions.
> >>>>>>>>
> >>>>>>>> Thanks -
> >>>>>>>> Manish
> >>>>>>>
> >>>>>>> I'm not sure what your goal is here, but it sounds to me like you
> >> might want to be googling for "linux namespaces".
> >>>>>>
> >>>>>> I'm sorry. I see that my previous mail had a key word "development"
> >>>>>> missing. What I was trying to find out was that is it possible to
> >>>>>> setup and use linux containers/cgroups to do kernel development.
> >>>>>> Things like writing and test kernel modules, debugging kernel,
> >>>>>> attaching gdb etc. etc. which normally require Qemu, busybox or
> other
> >>>>>> VM techniques since containers are much lightweight and if anyone
> has
> >>>>>> recipes for that setup to do development without crashing the host
> OS.
> >>>>>>
> >>>>>> Any hints appreciated. I looked for "linux namespaces" but it
> doesn't
> >>>>>> give me what I want.
> >>>>>>
> >>>>>
> >>>>> I have no first hand experience, but I don't think containers have
> the
> >>>>> flexibility you need.  Docker in particular shares the kernel with
> the
> >>>>> host OS as far as I know, so it would not be of any value that I can
> >>>>> see.
> >>>>>
> >>>>> I think a unikernel may be what you are looking for:
> >>>>>
> >>>>>
> >>
> http://www.linux.com/news/enterprise/cloud-computing/821243-unikernel-use-cases-containers
> >>>>>
> >>>>> My understanding is that with a unikernel you can move targeted
> >>>>> portions of the Hypervisor kernel up into the unikernel.  Thus if you
> >>>>> wanted to work on a network driver, you could implement it in a
> >>>>> unikernel.  Then if it blew up you would fall back to the hypervisor
> >>>>> level, kill the unikernel and try again.
> >>>>>
> >>>>> The Rump kernel (a unikernel) in particular might be a good option:
> >>>>>
> >>>>> ==
> >>>>> Rump Kernels — provide free, portable, componentized, kernel quality
> >>>>> drivers such as file systems, POSIX system call handlers, PCI device
> >>>>> drivers, a SCSI protocol stack, virtio and a TCP/IP stack. These
> >>>>> drivers may be integrated into existing systems, or run as
> stand-alone
> >>>>> unikernels on cloud hypervisors and embedded systems.
> >>>>> ==
> >>>>>
> >>>>> I have no first hand experience with the Rump Kernel, so I don't know
> >>>>> if it would work as a way to do linux kernel development or not.  It
> >>>>> certainly seems like a great environment for generic kernel
> >>>>> development.
> >>>>
> >>>> Thanks a lot GregF/GregKH,
> >>>>
> >>>>   That's what I suspected, that it might not be possible because of
> >>>> both sharing the same OS. I'll have a look at Rump Kernels and see how
> >>>> far it goes. Thanks for the pointers !
> >>>>
> >>>> _______________________________________________
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> >>>
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> >>
> >
>
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