[Nix-dev] (setcap-wrapper) Building a nixos vm to test nixos-level modifications

[Parnell Springmeyer]

This was very helpful, thank you Layus!

On Fri, Jul 1, 2016 at 1:38 AM, Layus <layus.on at gmail.com> wrote:

> To build a nixos vm based on a custom configuration.nix, you use
>
> $ export NIXOS_CONFIG=/my/custom/configuration.nix
> then
> $ nix-build “/your/checkout/of/nixpkgs”/nixos -A vm; # or, preferably,
> $ nixos-rebuild build-vm -I nixpkgs=/your/checkout/of/nixpkgs
>
> But see the excellent ML thread about building a nixos vm for testing
> purposes[1].
>
> Also, you may want to look at nbp’s fosdem presentation resources for
> examples of minimal and modular NixOS configurations[2][3]
>
> Finally, as it seems that you may test networking features, note that the
> vm uses kvm virtio for the network card by default.
> If you need real hardware emulation, use something like:
>
> {
>   virtualisation.qemu.networkingOptions = [
>     "-net nic,vlan=0,model=e1000" # Replace virtio, otherwise mptcp is bypassed.
>     "-net user,vlan=0\${QEMU_NET_OPTS:+,$QEMU_NET_OPTS}" # keep the second line.
>   ];
> }
>
> For comparison, my setup for testing inginious+linux_mptcp is attached.
>
> Regards,
>
> — Layus.
>
> [1]
> <http://lists.science.uu.nl/pipermail/nix-dev/2016-June/thread.html#20792>
> http://lists.science.uu.nl/pipermail/nix-dev/2016-June/thread.html#20792
> [2]
> <https://github.com/nbp/slides/tree/master/FOSDEM/2015.Nix-NixOS-NixOps>
> https://github.com/nbp/slides/tree/master/FOSDEM/2015.Nix-NixOS-NixOps
> [3] <https://nbp.github.io/slides/FOSDEM/2015.Nix-NixOS-NixOps/>
> https://nbp.github.io/slides/FOSDEM/2015.Nix-NixOS-NixOps/
>
> On 01/07/16 02:44, Parnell Springmeyer wrote:
>
> Hi! I recently added setcap-wrapper functionality to nixos at awake
> networks and I have contributed the changes in a fork on my own branch.
>
> My ask is: I'm having trouble figuring out how I should test this.
> Building a package is easy but is there a formula some where for building a
> nixos VM to test the setcap-wrapper functionality and my own modifications
> to take ping and ping6 out of the setuid and use setcap instead?
>
> --
> Parnell Springmeyer
> parnell at digitalmentat.com | digitalmentat.com | 0xDCCF89258EAD874A
> <http://pgp.mit.edu/pks/lookup?op=get&search=0xDCCF89258EAD874A>
>
>
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>


-- 
Parnell Springmeyer
parnell at digitalmentat.com | digitalmentat.com | 0xDCCF89258EAD874A
<http://pgp.mit.edu/pks/lookup?op=get&search=0xDCCF89258EAD874A>
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