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Re: Offloading to use Guile-SSH instead of lsh
From: |
Efraim Flashner |
Subject: |
Re: Offloading to use Guile-SSH instead of lsh |
Date: |
Sun, 6 Nov 2016 09:47:26 +0200 |
User-agent: |
Mutt/1.7.1 (2016-10-04) |
On Sat, Nov 05, 2016 at 04:41:41PM +0100, Ludovic Courtès wrote:
> Hello!
>
> The ‘wip-guile-ssh’ branch is finally getting into shape. As soon as
> a new Guile-SSH release is out, I’ll merge it on master.
>
> The goal of this branch is to use Guile-SSH (libssh bindings) instead of
> invoking ‘lsh’ when offloading builds (see
> <https://www.gnu.org/software/guix/manual/html_node/Daemon-Offload-Setup.html>
> for background.)
>
> The new code is shorter(!), more efficient, more elegant, and hopefully
> more reliable. The efficiency gains come from the fact that we can
> reuse SSH sessions in an intelligent way. The elegance has to do with
> the fact that we have direct access to the SSH API, as opposed to
> invoking ‘lsh’ and checking its exit status.
>
> Improved reliability (well, modulo new bugs ;-)) comes from the fact
> that we open a direct connection to the remote guix-daemon for the
> duration of the offload, which allows us to better control GC root
> registration—we can use the ‘add-temp-root’ RPC directly instead of
> writing indirect root files in $HOME.
>
> Before we put it in production on hydra.gnu.org :-), I’d welcome more
> testing! To do that you need a current Guile-SSH (with the
> ‘channel-send-eof!’ procedure), and the ‘build-machine’ form is
> slightly different than before: it has a new ‘host-key’ field to contain
> the OpenSSH-formatted host key of the machine. I’ve updated the doc to
> reflect that.
>
> Feedback welcome!
>
> Ludo’.
>
So to clarify, I need to switch just the master to the wip-guile-ssh
branch, or also the slaves?
--
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- Offloading to use Guile-SSH instead of lsh, Ludovic Courtès, 2016/11/05
- Re: Offloading to use Guile-SSH instead of lsh,
Efraim Flashner <=
- Re: Offloading to use Guile-SSH instead of lsh, Ludovic Courtès, 2016/11/25
- Re: Offloading to use Guile-SSH instead of lsh, Leo Famulari, 2016/11/25
- Re: Offloading to use Guile-SSH instead of lsh, 宋文武, 2016/11/26
- Re: Offloading to use Guile-SSH instead of lsh, Ludovic Courtès, 2016/11/27
- Re: Offloading to use Guile-SSH instead of lsh, Efraim Flashner, 2016/11/28
- ‘guix pull’ and external dependencies, Ludovic Courtès, 2016/11/28
- Re: ‘guix pull’ and external dependencies, Chris Marusich, 2016/11/28
- Re: ‘guix pull’ and external dependencies, Ludovic Courtès, 2016/11/29