[bug#53486] [PATCH] deploy: Add '--execute'.

["Ludovic Courtès" <ludo@gnu.org>]

Hi,

Ricardo Wurmus <rekado@elephly.net> skribis:

> This sure is useful, but for the very first time I feel that this
> doesn’t quite belong.  There are a bunch of tools out there that focus
> exclusively on remote execution on several machines at once.
>
> One of them is pdsh, which lets you also define groups of machines by
> type and submit to a selected subset.  It also displays remote output
> locally, and it sends local input to the remote as well.
>
> It’s tempting to add this to “guix deploy” because it likely that
> parallel remote execution is desired when “guix deploy” is used, but it
> also feels … kinda wrong.

True, but here that allows you to talk to the machines actually listed
in ‘deploy.scm’.  Were you to use an external tool, you’d have to
somehow grep/sed the thing to get a list of host names.

> I wonder if there’s a Guixy spin on remote execution — the
> aforementioned “deploy-hook” feels more at home here, in my opinion.

Yes, and it would use the same mechanism.  It would also more pleasant
for things you want to routinely do after a deployment.

Still, sometimes you just want to run “uname -a” or something to see if
you rebooted the machines, and a deploy hook won’t help with it.

WDYT?

Thanks,
Ludo’.