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Re: Guix "ops"
From: |
Christopher Allan Webber |
Subject: |
Re: Guix "ops" |
Date: |
Thu, 20 Oct 2016 12:01:04 -0500 |
User-agent: |
mu4e 0.9.16; emacs 25.1.1 |
Ludovic Courtès writes:
> Christopher Allan Webber <address@hidden> skribis:
>
>> - Should I build the entire derivation of the system I want to run on
>> the remote machine locally first, then copy that over? (I assume
>> this is possible, and eventually desirable, especially if doing
>> mass deployments? But it might not be desirable in every case.)
>> Would that use the substitute mechanism?
>
> Yes! :-)
>
> Essentially deployment would work like this:
>
> 1. Compute the system derivation and build it locally (i.e., on the
> machine where ‘guix deploy’ is running.)
>
> As a user, you can choose to have offloading setup such that the
> actual build will take place on (some of) the target machines, but
> that’s completely orthogonal.
>
> 2. Send the derivation out to the target(s) that are real machines.
> For targets that are local containers or VMs, there’s nothing to
> do.
>
> 3. On targets that are real machines, perform the equivalent of ‘guix
> system reconfigure’—i.e., update the /run/current-system symlink,
> restart Shepherd services that can be restarted, etc.
>
> IIRC David was testing using VMs and containers as the targets (the
> <platform> record¹) because it’s easier.
>
> Does that make sense?
>
> Hopefully David will correct me. :-)
Ok, it does make sense!
It's nice to see the examples in the docs of exporting a system over
ssh, even. Anyway, I played with "guix archive" this morning; it works
well. So, sending an entire closure over the network: should be easy.
I see that there's a --missing field; I'm a little bit unsure of how two
machines would coordinate here though with the existing tooling... it
doesn't look like we have a way to export the list of packges that
--missing could then read in? And then you'd need to feed whatever
--missing gave you back into --export I guess.
Anyway, it does seem like this is the right direction! Exciting!
- Chris
>
> Ludo’.
>
> ¹ https://lists.gnu.org/archive/html/guix-devel/2015-07/msg00320.html