Re: how to create and test a new service definition

[Catonano <catonano@gmail.com>]

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2017-05-14 10:44 GMT+02:00 Vincent Legoll <vincent.legoll@gmail.com>:

> On Sat, May 13, 2017 at 10:06 PM, Ludovic Courtès <ludo@gnu.org> wrote:
> > Vincent Legoll <vincent.legoll@gmail.com> skribis:
> >> ERROR: qemu failed "qemu-system-x86_64"
> >
> > What were the lines above this one?  This tool tries to use KVM if it
> > seems available.  Maybe in your case it “seems” to be available (as in
> > /dev/kvm exists) but is actually unusable?
>
> Formatting '/gnu/store/miyri69r76ji72y6aq5xci8z2j68n5s1-qemu-image',
> fmt=qcow2 size=31457280 encryption=off cluster_size=65536
> lazy_refcounts=off refcount_bits=16
> qemu-system-x86_64: error: failed to set MSR 0xd90 to 0x0
> qemu-system-x86_64:
> /tmp/guix-build-qemu-minimal-2.9.0.drv-0/qemu-2.9.0/target/
> i386/kvm.c:1833:
> kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.
> Backtrace:
> In ice-9/boot-9.scm:
>  160: 10 [catch #t #<catch-closure 8c5b80> ...]
> In unknown file:
>    ?: 9 [apply-smob/1 #<catch-closure 8c5b80>]
> In ice-9/boot-9.scm:
>   66: 8 [call-with-prompt prompt0 ...]
> In ice-9/eval.scm:
>  432: 7 [eval # #]
> In ice-9/boot-9.scm:
> 2412: 6 [save-module-excursion #<procedure 8e67c0 at
> ice-9/boot-9.scm:4084:3 ()>]
> 4089: 5 [#<procedure 8e67c0 at ice-9/boot-9.scm:4084:3 ()>]
> 1734: 4 [%start-stack load-stack #<procedure 8f69c0 at
> ice-9/boot-9.scm:4080:10 ()>]
> 1739: 3 [#<procedure 8f86c0 ()>]
> In unknown file:
>    ?: 2 [primitive-load
> "/gnu/store/rdpki7xkanivgb7jdczvk27kma47rj54-qemu-image-builder"]
> In ./gnu/build/vm.scm:
>  126: 1 [load-in-linux-vm
> "/gnu/store/6mcs53r3ggy3csq7z4hwhx2iccfds3yn-linux-vm-loader" ...]
> In unknown file:
>    ?: 0 [scm-error misc-error #f "~A ~S" ("qemu failed"
> "qemu-system-x86_64") #f]
>
> ERROR: In procedure scm-error:
> ERROR: qemu failed "qemu-system-x86_64"
> environment variable `PATH' set to
> `/gnu/store/rh3953267ifpb5bpl3l0f9vcmkx6zgl5-qemu-minimal-2.9.0/bin:/
> gnu/store/6908gy3pws0ccys49ni98idwnicchlr2-coreutils-8.26/bin'
> builder for `/gnu/store/g2zyq34flqswxaikr0m774aizwbh0xdm-qemu-image.drv'
> failed with exit code 1
> cannot build derivation
> `/gnu/store/qh5rvmv7rss59w4prb4bwq0r1m0jqwql-run-vm.sh.drv': 1
> dependencies couldn't be built
> guix system: error: build failed: build of
> `/gnu/store/qh5rvmv7rss59w4prb4bwq0r1m0jqwql-run-vm.sh.drv' failed
>
> Looks like kvm is there though, in my qemu guixsd VM:
>
> vince@guixsd ~$ l /dev/*kvm*
> crw-rw---- 1 root kvm 10, 232 May 14 10:36 /dev/kvm
>
> Maybe use of qemu without hw assisted kvm would work when already in a
> virtualized environment...
>
> > ‘GUIX_PACKAGE_PATH’ is documented at
> > <https://www.gnu.org/software/guix/manual/html_node/Package-
> Modules.html#index-GUIX_005fPACKAGE_005fPATH>.
>
> Yes, that's where I finally found it again, with google's help, I
> first searched there:
>
> > <https://www.gnu.org/software/guix/manual/html_node/
> Defining-Packages.html>,
> > <https://www.gnu.org/software/guix/manual/html_node/
> Submitting-Patches.html>.
>
> So I think adding something to these pages, maybe only linking to where it
> is
> described would have been sufficient... WDYT ?
>
> > There’s probably room for improvement though.  What changes/additions
> > would you suggest?
>
> I would suggest having a paragraph or 2 about how to setup a dev
> environment:
> - using GUIX_PACKAGE_PATH
> - setting up a link (where ?) to a local guix checkout
>
> I read "8.1 Building from Git" and was frustrated by its avoidance to
> explain
> how to do it. This is the logical (at least for me) place where this
> should be
> explained.
>
> I can try to add something about the env var, but cannot do the link
> thing, I
> think this is what Catonano is speaking about :
>
> > George suggested me the trick to link a checked out master branch to
> > .local/guix/profile (or maybe it's the other way around: it's linking
> > .local/guix/profile to a checked out master branch)
>
> WDYT ?
>

Yes, I am referring to this
https://lists.gnu.org/archive/html/help-guix/2017-05/msg00090.html

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