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remote: Build derivations appropriate for the remote's

* gnu/machine/ssh.scm (machine-ssh-configuration): Add 'system' field.
(managed-host-remote-eval): Pass 'system' field to 'remote-eval'.
(machine-check-building-for-appropriate-system): New variable.
(check-deployment-sanity): Add call to
'machine-check-building-for-appropriate-system'.
* doc/guix.texi (Invoking guix deploy): Describe new 'system' field.
* guix/ssh.scm (remote-system): New variable.
* guix/remote.scm (remote-eval): Use result of 'remote-system' when
lowering the G-Expression.
(remote-eval): Add 'system' keyword argument.
(trampoline): Return a <program-file> rather than a <scheme-file>.
wip-buildroot
Jakob L. Kreuze 3 years ago
committed by Christopher Lemmer Webber
parent
commit
2c8e04f136
No known key found for this signature in database GPG Key ID: 4BC025925FF8F4D3
  1. 3
      doc/guix.texi
  2. 31
      gnu/machine/ssh.scm
  3. 14
      guix/remote.scm
  4. 7
      guix/ssh.scm

3
doc/guix.texi

@ -25573,6 +25573,9 @@ with an @code{environment} of @code{managed-host-environment-type}.
@table @asis
@item @code{host-name}
@item @code{system}
The Nix system type describing the architecture of the machine being deployed
to. This should look something like ``x86_64-linux''.
@item @code{port} (default: @code{22})
@item @code{user} (default: @code{"root"})
@item @code{identity} (default: @code{#f})

31
gnu/machine/ssh.scm

@ -36,6 +36,7 @@
#:use-module (ice-9 match)
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:export (managed-host-environment-type
@ -68,6 +69,7 @@
machine-ssh-configuration?
this-machine-ssh-configuration
(host-name machine-ssh-configuration-host-name) ; string
(system machine-ssh-configuration-system) ; string
(build-locally? machine-ssh-configuration-build-locally?
(default #t))
(port machine-ssh-configuration-port ; integer
@ -103,10 +105,12 @@ one from the configuration's parameters if one was not provided."
"Internal implementation of 'machine-remote-eval' for MACHINE instances with
an environment type of 'managed-host."
(maybe-raise-unsupported-configuration-error machine)
(remote-eval exp (machine-ssh-session machine)
#:build-locally?
(machine-ssh-configuration-build-locally?
(machine-configuration machine))))
(let ((config (machine-configuration machine)))
(remote-eval exp (machine-ssh-session machine)
#:build-locally?
(machine-ssh-configuration-build-locally? config)
#:system
(machine-ssh-configuration-system config))))
;;;
@ -240,10 +244,29 @@ MACHINE's 'system' declaration do not exist on the machine."
device)
(return #t)))
(define (machine-check-building-for-appropriate-system machine)
"Raise a '&message' error condition if MACHINE is configured to be built
locally and the 'system' field does not match the '%current-system' reported
by MACHINE."
(let ((config (machine-configuration machine))
(system (remote-system (machine-ssh-session machine))))
(when (and (machine-ssh-configuration-build-locally? config)
(not (string= system (machine-ssh-configuration-system config))))
(raise (condition
(&message
(message (format #f (G_ "incorrect target system \
('~a' was given, while the system reports that it is '~a')~%")
(machine-ssh-configuration-system config)
system)))))))
(with-monad %store-monad (return #t)))
(define (check-deployment-sanity machine)
"Raise a '&message' error condition if it is clear that deploying MACHINE's
'system' declaration would fail."
;; Order is important here -- an incorrect value for 'system' will cause
;; invocations of 'remote-eval' to fail.
(mbegin %store-monad
(machine-check-building-for-appropriate-system machine)
(machine-check-file-system-availability machine)
(machine-check-initrd-modules machine)))

14
guix/remote.scm

@ -24,6 +24,7 @@
#:use-module (guix monads)
#:use-module (guix modules)
#:use-module (guix derivations)
#:use-module (guix utils)
#:use-module (ssh popen)
#:use-module (srfi srfi-1)
#:use-module (ice-9 match)
@ -71,7 +72,7 @@ prerequisites of EXP are already available on the host at SESSION."
"Return a \"trampoline\" gexp that evaluates EXP and writes the evaluation
result to the current output port using the (guix repl) protocol."
(define program
(scheme-file "remote-exp.scm" exp))
(program-file "remote-exp.scm" exp))
(with-imported-modules (source-module-closure '((guix repl)))
#~(begin
@ -89,6 +90,7 @@ result to the current output port using the (guix repl) protocol."
(define* (remote-eval exp session
#:key
(build-locally? #t)
(system (%current-system))
(module-path %load-path)
(socket-name "/var/guix/daemon-socket/socket"))
"Evaluate EXP, a gexp, on the host at SESSION, an SSH session. Ensure that
@ -96,10 +98,12 @@ all the elements EXP refers to are built and deployed to SESSION beforehand.
When BUILD-LOCALLY? is true, said dependencies are built locally and sent to
the remote store afterwards; otherwise, dependencies are built directly on the
remote store."
(mlet %store-monad ((lowered (lower-gexp (trampoline exp)
#:module-path %load-path))
(remote -> (connect-to-remote-daemon session
socket-name)))
(mlet* %store-monad ((lowered (lower-gexp (trampoline exp)
#:system system
#:guile-for-build #f
#:module-path %load-path))
(remote -> (connect-to-remote-daemon session
socket-name)))
(define inputs
(cons (lowered-gexp-guile lowered)
(lowered-gexp-inputs lowered)))

7
guix/ssh.scm

@ -39,6 +39,7 @@
remote-inferior
remote-daemon-channel
connect-to-remote-daemon
remote-system
send-files
retrieve-files
retrieve-files*
@ -282,6 +283,12 @@ be read. When RECURSIVE? is true, the closure of FILES is exported."
,(object->string
(object->string export))))))
(define (remote-system session)
"Return the system type as expected by Nix, usually ARCHITECTURE-KERNEL, of
the machine on the other end of SESSION."
(inferior-remote-eval '(begin (use-modules (guix utils)) (%current-system))
session))
(define* (send-files local files remote
#:key
recursive?

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