mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-24 05:18:07 -05:00
gnu: Add machine type for deployment specifications.
* gnu/machine.scm: New file. * gnu/machine/ssh.scm: New file. * gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
This commit is contained in:
parent
a9b09ed776
commit
fa9edf09e9
5 changed files with 483 additions and 2 deletions
|
@ -425,7 +425,8 @@ SCM_TESTS = \
|
|||
tests/import-utils.scm \
|
||||
tests/store-database.scm \
|
||||
tests/store-deduplication.scm \
|
||||
tests/store-roots.scm
|
||||
tests/store-roots.scm \
|
||||
tests/machine.scm
|
||||
|
||||
SH_TESTS = \
|
||||
tests/guix-build.sh \
|
||||
|
|
|
@ -565,6 +565,9 @@ GNU_SYSTEM_MODULES = \
|
|||
%D%/system/uuid.scm \
|
||||
%D%/system/vm.scm \
|
||||
\
|
||||
%D%/machine.scm \
|
||||
%D%/machine/ssh.scm \
|
||||
\
|
||||
%D%/build/accounts.scm \
|
||||
%D%/build/activation.scm \
|
||||
%D%/build/bootloader.scm \
|
||||
|
@ -630,7 +633,7 @@ INSTALLER_MODULES = \
|
|||
%D%/installer/newt/user.scm \
|
||||
%D%/installer/newt/utils.scm \
|
||||
%D%/installer/newt/welcome.scm \
|
||||
%D%/installer/newt/wifi.scm
|
||||
%D%/installer/newt/wifi.scm
|
||||
|
||||
# Always ship the installer modules but compile them only when
|
||||
# ENABLE_INSTALLER is true.
|
||||
|
|
107
gnu/machine.scm
Normal file
107
gnu/machine.scm
Normal file
|
@ -0,0 +1,107 @@
|
|||
;;; GNU Guix --- Functional package management for GNU
|
||||
;;; Copyright © 2019 David Thompson <davet@gnu.org>
|
||||
;;; Copyright © 2019 Jakob L. Kreuze <zerodaysfordays@sdf.lonestar.org>
|
||||
;;;
|
||||
;;; This file is part of GNU Guix.
|
||||
;;;
|
||||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||||
;;; under the terms of the GNU General Public License as published by
|
||||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||||
;;; your option) any later version.
|
||||
;;;
|
||||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
;;; GNU General Public License for more details.
|
||||
;;;
|
||||
;;; You should have received a copy of the GNU General Public License
|
||||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
(define-module (gnu machine)
|
||||
#:use-module (gnu system)
|
||||
#:use-module (guix derivations)
|
||||
#:use-module (guix monads)
|
||||
#:use-module (guix records)
|
||||
#:use-module (guix store)
|
||||
#:use-module ((guix utils) #:select (source-properties->location))
|
||||
#:export (environment-type
|
||||
environment-type?
|
||||
environment-type-name
|
||||
environment-type-description
|
||||
environment-type-location
|
||||
|
||||
machine
|
||||
machine?
|
||||
this-machine
|
||||
|
||||
machine-system
|
||||
machine-environment
|
||||
machine-configuration
|
||||
machine-display-name
|
||||
|
||||
deploy-machine
|
||||
machine-remote-eval))
|
||||
|
||||
;;; Commentary:
|
||||
;;;
|
||||
;;; This module provides the types used to declare individual machines in a
|
||||
;;; heterogeneous Guix deployment. The interface allows users of specify system
|
||||
;;; configurations and the means by which resources should be provisioned on a
|
||||
;;; per-host basis.
|
||||
;;;
|
||||
;;; Code:
|
||||
|
||||
|
||||
;;;
|
||||
;;; Declarations for resources that can be provisioned.
|
||||
;;;
|
||||
|
||||
(define-record-type* <environment-type> environment-type
|
||||
make-environment-type
|
||||
environment-type?
|
||||
|
||||
;; Interface to the environment type's deployment code. Each procedure
|
||||
;; should take the same arguments as the top-level procedure of this file
|
||||
;; that shares the same name. For example, 'machine-remote-eval' should be
|
||||
;; of the form '(machine-remote-eval machine exp)'.
|
||||
(machine-remote-eval environment-type-machine-remote-eval) ; procedure
|
||||
(deploy-machine environment-type-deploy-machine) ; procedure
|
||||
|
||||
;; Metadata.
|
||||
(name environment-type-name) ; symbol
|
||||
(description environment-type-description ; string
|
||||
(default #f))
|
||||
(location environment-type-location ; <location>
|
||||
(default (and=> (current-source-location)
|
||||
source-properties->location))
|
||||
(innate)))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Declarations for machines in a deployment.
|
||||
;;;
|
||||
|
||||
(define-record-type* <machine> machine
|
||||
make-machine
|
||||
machine?
|
||||
this-machine
|
||||
(system machine-system) ; <operating-system>
|
||||
(environment machine-environment) ; symbol
|
||||
(configuration machine-configuration ; configuration object
|
||||
(default #f))) ; specific to environment
|
||||
|
||||
(define (machine-display-name machine)
|
||||
"Return the host-name identifying MACHINE."
|
||||
(operating-system-host-name (machine-system machine)))
|
||||
|
||||
(define (machine-remote-eval machine exp)
|
||||
"Evaluate EXP, a gexp, on MACHINE. Ensure that all the elements EXP refers to
|
||||
are built and deployed to MACHINE beforehand."
|
||||
(let ((environment (machine-environment machine)))
|
||||
((environment-type-machine-remote-eval environment) machine exp)))
|
||||
|
||||
(define (deploy-machine machine)
|
||||
"Monadic procedure transferring the new system's OS closure to the remote
|
||||
MACHINE, activating it on MACHINE and switching MACHINE to the new generation."
|
||||
(let ((environment (machine-environment machine)))
|
||||
((environment-type-deploy-machine environment) machine)))
|
369
gnu/machine/ssh.scm
Normal file
369
gnu/machine/ssh.scm
Normal file
|
@ -0,0 +1,369 @@
|
|||
;;; GNU Guix --- Functional package management for GNU
|
||||
;;; Copyright © 2019 Jakob L. Kreuze <zerodaysfordays@sdf.lonestar.org>
|
||||
;;;
|
||||
;;; This file is part of GNU Guix.
|
||||
;;;
|
||||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||||
;;; under the terms of the GNU General Public License as published by
|
||||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||||
;;; your option) any later version.
|
||||
;;;
|
||||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
;;; GNU General Public License for more details.
|
||||
;;;
|
||||
;;; You should have received a copy of the GNU General Public License
|
||||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
(define-module (gnu machine ssh)
|
||||
#:use-module (gnu bootloader)
|
||||
#:use-module (gnu machine)
|
||||
#:autoload (gnu packages gnupg) (guile-gcrypt)
|
||||
#:use-module (gnu services)
|
||||
#:use-module (gnu services shepherd)
|
||||
#:use-module (gnu system)
|
||||
#:use-module (guix derivations)
|
||||
#:use-module (guix gexp)
|
||||
#:use-module (guix i18n)
|
||||
#:use-module (guix modules)
|
||||
#:use-module (guix monads)
|
||||
#:use-module (guix records)
|
||||
#:use-module (guix remote)
|
||||
#:use-module (guix ssh)
|
||||
#:use-module (guix store)
|
||||
#:use-module (ice-9 match)
|
||||
#:use-module (srfi srfi-19)
|
||||
#:use-module (srfi srfi-35)
|
||||
#:export (managed-host-environment-type
|
||||
|
||||
machine-ssh-configuration
|
||||
machine-ssh-configuration?
|
||||
machine-ssh-configuration
|
||||
|
||||
machine-ssh-configuration-host-name
|
||||
machine-ssh-configuration-port
|
||||
machine-ssh-configuration-user
|
||||
machine-ssh-configuration-session))
|
||||
|
||||
;;; Commentary:
|
||||
;;;
|
||||
;;; This module implements remote evaluation and system deployment for
|
||||
;;; machines that are accessable over SSH and have a known host-name. In the
|
||||
;;; sense of the broader "machine" interface, we describe the environment for
|
||||
;;; such machines as 'managed-host.
|
||||
;;;
|
||||
;;; Code:
|
||||
|
||||
|
||||
;;;
|
||||
;;; Parameters for the SSH client.
|
||||
;;;
|
||||
|
||||
(define-record-type* <machine-ssh-configuration> machine-ssh-configuration
|
||||
make-machine-ssh-configuration
|
||||
machine-ssh-configuration?
|
||||
this-machine-ssh-configuration
|
||||
(host-name machine-ssh-configuration-host-name) ; string
|
||||
(port machine-ssh-configuration-port ; integer
|
||||
(default 22))
|
||||
(user machine-ssh-configuration-user ; string
|
||||
(default "root"))
|
||||
(identity machine-ssh-configuration-identity ; path to a private key
|
||||
(default #f))
|
||||
(session machine-ssh-configuration-session ; session
|
||||
(default #f)))
|
||||
|
||||
(define (machine-ssh-session machine)
|
||||
"Return the SSH session that was given in MACHINE's configuration, or create
|
||||
one from the configuration's parameters if one was not provided."
|
||||
(maybe-raise-unsupported-configuration-error machine)
|
||||
(let ((config (machine-configuration machine)))
|
||||
(or (machine-ssh-configuration-session config)
|
||||
(let ((host-name (machine-ssh-configuration-host-name config))
|
||||
(user (machine-ssh-configuration-user config))
|
||||
(port (machine-ssh-configuration-port config))
|
||||
(identity (machine-ssh-configuration-identity config)))
|
||||
(open-ssh-session host-name
|
||||
#:user user
|
||||
#:port port
|
||||
#:identity identity)))))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Remote evaluation.
|
||||
;;;
|
||||
|
||||
(define (managed-host-remote-eval machine exp)
|
||||
"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)))
|
||||
|
||||
|
||||
;;;
|
||||
;;; System deployment.
|
||||
;;;
|
||||
|
||||
(define (switch-to-system machine)
|
||||
"Monadic procedure creating a new generation on MACHINE and execute the
|
||||
activation script for the new system configuration."
|
||||
(define (remote-exp drv script)
|
||||
(with-extensions (list guile-gcrypt)
|
||||
(with-imported-modules (source-module-closure '((guix config)
|
||||
(guix profiles)
|
||||
(guix utils)))
|
||||
#~(begin
|
||||
(use-modules (guix config)
|
||||
(guix profiles)
|
||||
(guix utils))
|
||||
|
||||
(define %system-profile
|
||||
(string-append %state-directory "/profiles/system"))
|
||||
|
||||
(let* ((system #$drv)
|
||||
(number (1+ (generation-number %system-profile)))
|
||||
(generation (generation-file-name %system-profile number)))
|
||||
(switch-symlinks generation system)
|
||||
(switch-symlinks %system-profile generation)
|
||||
;; The implementation of 'guix system reconfigure' saves the
|
||||
;; load path and environment here. This is unnecessary here
|
||||
;; because each invocation of 'remote-eval' runs in a distinct
|
||||
;; Guile REPL.
|
||||
(setenv "GUIX_NEW_SYSTEM" system)
|
||||
;; The activation script may write to stdout, which confuses
|
||||
;; 'remote-eval' when it attempts to read a result from the
|
||||
;; remote REPL. We work around this by forcing the output to a
|
||||
;; string.
|
||||
(with-output-to-string
|
||||
(lambda ()
|
||||
(primitive-load #$script))))))))
|
||||
|
||||
(let* ((os (machine-system machine))
|
||||
(script (operating-system-activation-script os)))
|
||||
(mlet* %store-monad ((drv (operating-system-derivation os)))
|
||||
(machine-remote-eval machine (remote-exp drv script)))))
|
||||
|
||||
;; XXX: Currently, this does NOT attempt to restart running services. This is
|
||||
;; also the case with 'guix system reconfigure'.
|
||||
;;
|
||||
;; See <https://issues.guix.info/issue/33508>.
|
||||
(define (upgrade-shepherd-services machine)
|
||||
"Monadic procedure unloading and starting services on the remote as needed
|
||||
to realize the MACHINE's system configuration."
|
||||
(define target-services
|
||||
;; Monadic expression evaluating to a list of (name output-path) pairs for
|
||||
;; all of MACHINE's services.
|
||||
(mapm %store-monad
|
||||
(lambda (service)
|
||||
(mlet %store-monad ((file ((compose lower-object
|
||||
shepherd-service-file)
|
||||
service)))
|
||||
(return (list (shepherd-service-canonical-name service)
|
||||
(derivation->output-path file)))))
|
||||
(service-value
|
||||
(fold-services (operating-system-services (machine-system machine))
|
||||
#:target-type shepherd-root-service-type))))
|
||||
|
||||
(define (remote-exp target-services)
|
||||
(with-imported-modules '((gnu services herd))
|
||||
#~(begin
|
||||
(use-modules (gnu services herd)
|
||||
(srfi srfi-1))
|
||||
|
||||
(define running
|
||||
(filter live-service-running (current-services)))
|
||||
|
||||
(define (essential? service)
|
||||
;; Return #t if SERVICE is essential and should not be unloaded
|
||||
;; under any circumstance.
|
||||
(memq (first (live-service-provision service))
|
||||
'(root shepherd)))
|
||||
|
||||
(define (obsolete? service)
|
||||
;; Return #t if SERVICE can be safely unloaded.
|
||||
(and (not (essential? service))
|
||||
(every (lambda (requirements)
|
||||
(not (memq (first (live-service-provision service))
|
||||
requirements)))
|
||||
(map live-service-requirement running))))
|
||||
|
||||
(define to-unload
|
||||
(filter obsolete?
|
||||
(remove (lambda (service)
|
||||
(memq (first (live-service-provision service))
|
||||
(map first '#$target-services)))
|
||||
running)))
|
||||
|
||||
(define to-start
|
||||
(remove (lambda (service-pair)
|
||||
(memq (first service-pair)
|
||||
(map (compose first live-service-provision)
|
||||
running)))
|
||||
'#$target-services))
|
||||
|
||||
;; Unload obsolete services.
|
||||
(for-each (lambda (service)
|
||||
(false-if-exception
|
||||
(unload-service service)))
|
||||
to-unload)
|
||||
|
||||
;; Load the service files for any new services and start them.
|
||||
(load-services/safe (map second to-start))
|
||||
(for-each start-service (map first to-start))
|
||||
|
||||
#t)))
|
||||
|
||||
(mlet %store-monad ((target-services target-services))
|
||||
(machine-remote-eval machine (remote-exp target-services))))
|
||||
|
||||
(define (machine-boot-parameters machine)
|
||||
"Monadic procedure returning a list of 'boot-parameters' for the generations
|
||||
of MACHINE's system profile, ordered from most recent to oldest."
|
||||
(define bootable-kernel-arguments
|
||||
(@@ (gnu system) bootable-kernel-arguments))
|
||||
|
||||
(define remote-exp
|
||||
(with-extensions (list guile-gcrypt)
|
||||
(with-imported-modules (source-module-closure '((guix config)
|
||||
(guix profiles)))
|
||||
#~(begin
|
||||
(use-modules (guix config)
|
||||
(guix profiles)
|
||||
(ice-9 textual-ports))
|
||||
|
||||
(define %system-profile
|
||||
(string-append %state-directory "/profiles/system"))
|
||||
|
||||
(define (read-file path)
|
||||
(call-with-input-file path
|
||||
(lambda (port)
|
||||
(get-string-all port))))
|
||||
|
||||
(map (lambda (generation)
|
||||
(let* ((system-path (generation-file-name %system-profile
|
||||
generation))
|
||||
(boot-parameters-path (string-append system-path
|
||||
"/parameters"))
|
||||
(time (stat:mtime (lstat system-path))))
|
||||
(list generation
|
||||
system-path
|
||||
time
|
||||
(read-file boot-parameters-path))))
|
||||
(reverse (generation-numbers %system-profile)))))))
|
||||
|
||||
(mlet* %store-monad ((generations (machine-remote-eval machine remote-exp)))
|
||||
(return
|
||||
(map (lambda (generation)
|
||||
(match generation
|
||||
((generation system-path time serialized-params)
|
||||
(let* ((params (call-with-input-string serialized-params
|
||||
read-boot-parameters))
|
||||
(root (boot-parameters-root-device params))
|
||||
(label (boot-parameters-label params)))
|
||||
(boot-parameters
|
||||
(inherit params)
|
||||
(label
|
||||
(string-append label " (#"
|
||||
(number->string generation) ", "
|
||||
(let ((time (make-time time-utc 0 time)))
|
||||
(date->string (time-utc->date time)
|
||||
"~Y-~m-~d ~H:~M"))
|
||||
")"))
|
||||
(kernel-arguments
|
||||
(append (bootable-kernel-arguments system-path root)
|
||||
(boot-parameters-kernel-arguments params))))))))
|
||||
generations))))
|
||||
|
||||
(define (install-bootloader machine)
|
||||
"Create a bootloader entry for the new system generation on MACHINE, and
|
||||
configure the bootloader to boot that generation by default."
|
||||
(define bootloader-installer-script
|
||||
(@@ (guix scripts system) bootloader-installer-script))
|
||||
|
||||
(define (remote-exp installer bootcfg bootcfg-file)
|
||||
(with-extensions (list guile-gcrypt)
|
||||
(with-imported-modules (source-module-closure '((gnu build install)
|
||||
(guix store)
|
||||
(guix utils)))
|
||||
#~(begin
|
||||
(use-modules (gnu build install)
|
||||
(guix store)
|
||||
(guix utils))
|
||||
(let* ((gc-root (string-append "/" %gc-roots-directory "/bootcfg"))
|
||||
(temp-gc-root (string-append gc-root ".new")))
|
||||
|
||||
(switch-symlinks temp-gc-root gc-root)
|
||||
|
||||
(unless (false-if-exception
|
||||
(begin
|
||||
;; The implementation of 'guix system reconfigure'
|
||||
;; saves the load path here. This is unnecessary here
|
||||
;; because each invocation of 'remote-eval' runs in a
|
||||
;; distinct Guile REPL.
|
||||
(install-boot-config #$bootcfg #$bootcfg-file "/")
|
||||
;; The installation script may write to stdout, which
|
||||
;; confuses 'remote-eval' when it attempts to read a
|
||||
;; result from the remote REPL. We work around this
|
||||
;; by forcing the output to a string.
|
||||
(with-output-to-string
|
||||
(lambda ()
|
||||
(primitive-load #$installer)))))
|
||||
(delete-file temp-gc-root)
|
||||
(error "failed to install bootloader"))
|
||||
|
||||
(rename-file temp-gc-root gc-root)
|
||||
#t)))))
|
||||
|
||||
(mlet* %store-monad ((boot-parameters (machine-boot-parameters machine)))
|
||||
(let* ((os (machine-system machine))
|
||||
(bootloader ((compose bootloader-configuration-bootloader
|
||||
operating-system-bootloader)
|
||||
os))
|
||||
(bootloader-target (bootloader-configuration-target
|
||||
(operating-system-bootloader os)))
|
||||
(installer (bootloader-installer-script
|
||||
(bootloader-installer bootloader)
|
||||
(bootloader-package bootloader)
|
||||
bootloader-target
|
||||
"/"))
|
||||
(menu-entries (map boot-parameters->menu-entry boot-parameters))
|
||||
(bootcfg (operating-system-bootcfg os menu-entries))
|
||||
(bootcfg-file (bootloader-configuration-file bootloader)))
|
||||
(machine-remote-eval machine (remote-exp installer bootcfg bootcfg-file)))))
|
||||
|
||||
(define (deploy-managed-host machine)
|
||||
"Internal implementation of 'deploy-machine' for MACHINE instances with an
|
||||
environment type of 'managed-host."
|
||||
(maybe-raise-unsupported-configuration-error machine)
|
||||
(mbegin %store-monad
|
||||
(switch-to-system machine)
|
||||
(upgrade-shepherd-services machine)
|
||||
(install-bootloader machine)))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Environment type.
|
||||
;;;
|
||||
|
||||
(define managed-host-environment-type
|
||||
(environment-type
|
||||
(machine-remote-eval managed-host-remote-eval)
|
||||
(deploy-machine deploy-managed-host)
|
||||
(name 'managed-host-environment-type)
|
||||
(description "Provisioning for machines that are accessable over SSH
|
||||
and have a known host-name. This entails little more than maintaining an SSH
|
||||
connection to the host.")))
|
||||
|
||||
(define (maybe-raise-unsupported-configuration-error machine)
|
||||
"Raise an error if MACHINE's configuration is not an instance of
|
||||
<machine-ssh-configuration>."
|
||||
(let ((config (machine-configuration machine))
|
||||
(environment (environment-type-name (machine-environment machine))))
|
||||
(unless (and config (machine-ssh-configuration? config))
|
||||
(raise (condition
|
||||
(&message
|
||||
(message (format #f (G_ "unsupported machine configuration '~a'
|
||||
for environment of type '~a'")
|
||||
config
|
||||
environment))))))))
|
|
@ -36,6 +36,7 @@ gnu/installer/steps.scm
|
|||
gnu/installer/timezone.scm
|
||||
gnu/installer/user.scm
|
||||
gnu/installer/utils.scm
|
||||
gnu/machine/ssh.scm
|
||||
guix/scripts.scm
|
||||
guix/scripts/build.scm
|
||||
guix/discovery.scm
|
||||
|
|
Loading…
Reference in a new issue