Re: [gentoo-user] Making XEN functional

[Facundo Curti]

2014-03-23 9:35 GMT-03:00 J. Roeleveld <joost@××××××××.org>:
> On Sunday, March 23, 2014 05:47:53 PM Nilesh Govindrajan wrote:
>> I'm not meaning to hijack this thread, but isn't KVM a better option? The
>> difference between Xen and KVM is tiny I think, no?

What I see on web, is that XEN uses paravirtualization. If you have
the correct hardware (like i have), XEN have better perfonmance. My
intel i7 have virtualization instructions. See [1][2] y [3]

I'm new in virtualization, i'm doing this for a desktop machine. Just
for learn. Instead of use VirtualBOX or VMware, I'm installing XEN.
Best perfonmance, and I can learn in the process.


2014-03-23 9:14 GMT-03:00 J. Roeleveld <joost@××××××××.org>:
>
> I see this in "tmp":
> *****
> checking whether the C compiler works... no
> configure: error: in `/var/tmp/portage/app-emulation/xen-tools-4.3.1-
> r5/work/xen-4.3.1/tools':
> configure: error: C compiler cannot create executables
> ******
>
> Please fix your C-compiler. What does the following command return?
> # gcc-config -L
>

/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.3:/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.3/32

> Please use the " xl"  command set. " xm" is deprecated.
>
:O I didn't know it was deprecated.

> Please also ensure you start the xen services:
> # /etc/init.d/xencommons start
> # /etc/init.d/xenstored start
> # /etc/init.d/xenconsoled start
>
> before trying the xl commands.
>
I'm using systemd, so I tried to start this way:
       systemctl enable xencommons
       systemctl enable xenstored
       systemctl enable xencosnsoled
And none exists :P (No such file or directory)

Instead, if I make it with /etc/init.d/xenstored start
it says:
WARNING: xenstored is already starting
(the same with xencommons and xenconsoled)

So, I try do xl list, and says:

libxl: error: libxl.c:87:libxl_ctx_alloc: Is xenstore daemon running?
failed to stat /var/run/xenstored.pid: No such file or directory
cannot init xl context

The correct way is start it from systemd? Or through /etc/init.d ?

>> My .config from kernel is [configKernel] and my [grub.cfg]
>
> I will check those if the above didn't solve it.
>
> I have the following installed on my server:
> [I] app-emulation/xen
>      Installed versions:  4.3.1-r5^t{tbz2}(12:09:22 PM 02/21/2014)
> (efi -custom-cflags -debug -flask -xsm)
>
> [I] app-emulation/xen-tools
>   Installed versions:  4.3.1-r5^t{tbz2}(12:14:51 PM 02/21/2014)
> (api hvm pam qemu screen -custom-cflags -debug -doc -flask -ocaml -pygrub -
> python -static-libs -xend
> PYTHON_SINGLE_TARGET="python2_7 -python2_6" PYTHON_TARGETS="python2_7 -
> python2_6")
I have:

o.o. I dont have xen installed. ¿Is that possible? ._.

[ebuild  N     ] app-emulation/xen-4.3.1-r5  USE="efi xsm
-custom-cflags -debug -flask"

I'm trying to install it but says:

!!! copy /var/tmp/portage/app-emulation/xen-4.3.1-r5/image/boot/efi/gentoo/xen-4.3.1.efi
-> /boot/efi/gentoo/xen-4.3.1.efi failed.
!!! [Errno 28] No space left on device

Maybe is because I tried to re-emerge this? o.o

>
> --
> Joost
>

Thank you for help!


[1] http://www.linux.com/news/enterprise/systems-management/327628-kvm-or-xen-choosing-a-virtualization-platform
[2] http://iopscience.iop.org/1742-6596/219/4/042005/pdf/1742-6596_219_4_042005.pdf
[3] http://ark.intel.com/es/products/75122/intel-core-i7-4770-processor-8m-cache-up-to-3_90-ghz