[Nix-dev] Multiple ssh substituter hosts

[Bas van Dijk]

That seems like a good idea.

Ideally my hydra service would upload the nars it builds to a private s3
bucket. Then my machines need to use this private s3 bucket as a binary
cache.

Is there any documentation on how to do this?

On 20 November 2016 at 22:34, zimbatm <zimbatm at zimbatm.com> wrote:

> It's probably expensive to open all the ssh connections. Depending on your
> use-case you might be better off uploading all the binaries to a single
> destination like S3.
>
> On Sun, 20 Nov 2016 at 20:16 Bas van Dijk <v.dijk.bas at gmail.com> wrote:
>
> I see. Thanks for pointing me to the source.
>
> I also see that supporting more hosts is listed as a TODO:
>
>   https://github.com/NixOS/nix/blob/master/src/download-via-
> ssh/download-via-ssh.cc#L18
>
> Hopefully that gets implemented some day!
>
> Cheers,
>
> Bas
>
> On 20 November 2016 at 20:13, zimbatm <zimbatm at zimbatm.com> wrote:
>
> Hi Bas,
>
> It looks like it's only taking the first host from the list[1]. I suppose
> the intention was to provide fallbacks but it didn't get implemented.
>
> [1]: https://github.com/NixOS/nix/blob/master/src/download-via-
> ssh/download-via-ssh.cc#L114
>
>
> On Sun, 20 Nov 2016 at 15:49 Bas van Dijk <v.dijk.bas at gmail.com> wrote:
>
> Dear all,
>
> Is it possible to have multiple ssh-substituter-hosts, as in:
>
>   ssh-substituter-hosts = nix-ssh at host1 nix-ssh at host2
>
> The documentation[1] is not entirely clear on that.
>
> Bas
>
> [1] http://nixos.org/nix/manual/#ssec-ssh-substituter
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