mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-24 21:38:07 -05:00
5970e8e248
* gnu/build/linux-container.scm (mount-file-systems): 'mounts' is now a
list of <file-system> objects instead of a list of lists ("specs").
Add call to 'file-system->spec' as the argument to 'mount-file-system'.
(run-container, call-with-container): Adjust docstring accordingly.
* gnu/system/file-systems.scm (spec->file-system): New procedure.
* gnu/system/linux-container.scm (container-script)[script]: Call
'spec->file-system' inside gexp.
* guix/scripts/environment.scm (launch-environment/container): Remove
call to 'file-system->spec'.
* tests/containers.scm ("call-with-container, mnt namespace")
("call-with-container, mnt namespace, wrong bind mount"): Pass a list of
<file-system> objects.
113 lines
4.6 KiB
Scheme
113 lines
4.6 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2015 David Thompson <davet@gnu.org>
|
|
;;; Copyright © 2016 Ludovic Courtès <ludo@gnu.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 system linux-container)
|
|
#:use-module (ice-9 match)
|
|
#:use-module (srfi srfi-1)
|
|
#:use-module (guix config)
|
|
#:use-module (guix store)
|
|
#:use-module (guix gexp)
|
|
#:use-module (guix derivations)
|
|
#:use-module (guix monads)
|
|
#:use-module (guix modules)
|
|
#:use-module (gnu build linux-container)
|
|
#:use-module (gnu services)
|
|
#:use-module (gnu system)
|
|
#:use-module (gnu system file-systems)
|
|
#:export (mapping->file-system
|
|
system-container
|
|
containerized-operating-system
|
|
container-script))
|
|
|
|
(define (mapping->file-system mapping)
|
|
"Return a file system that realizes MAPPING."
|
|
(match mapping
|
|
(($ <file-system-mapping> source target writable?)
|
|
(file-system
|
|
(mount-point target)
|
|
(device source)
|
|
(type "none")
|
|
(flags (if writable?
|
|
'(bind-mount)
|
|
'(bind-mount read-only)))
|
|
(check? #f)
|
|
(create-mount-point? #t)))))
|
|
|
|
(define (containerized-operating-system os mappings)
|
|
"Return an operating system based on OS for use in a Linux container
|
|
environment. MAPPINGS is a list of <file-system-mapping> to realize in the
|
|
containerized OS."
|
|
(define user-file-systems
|
|
(remove (lambda (fs)
|
|
(let ((target (file-system-mount-point fs))
|
|
(source (file-system-device fs)))
|
|
(or (string=? target (%store-prefix))
|
|
(string=? target "/")
|
|
(and (string? source)
|
|
(string-prefix? "/dev/" source))
|
|
(string-prefix? "/dev" target)
|
|
(string-prefix? "/sys" target))))
|
|
(operating-system-file-systems os)))
|
|
|
|
(define (mapping->fs fs)
|
|
(file-system (inherit (mapping->file-system fs))
|
|
(needed-for-boot? #t)))
|
|
|
|
(operating-system (inherit os)
|
|
(swap-devices '()) ; disable swap
|
|
(file-systems (append (map mapping->fs (cons %store-mapping mappings))
|
|
%container-file-systems
|
|
user-file-systems))))
|
|
|
|
(define* (container-script os #:key (mappings '()))
|
|
"Return a derivation of a script that runs OS as a Linux container.
|
|
MAPPINGS is a list of <file-system> objects that specify the files/directories
|
|
that will be shared with the host system."
|
|
(let* ((os (containerized-operating-system os mappings))
|
|
(file-systems (filter file-system-needed-for-boot?
|
|
(operating-system-file-systems os)))
|
|
(specs (map file-system->spec file-systems)))
|
|
|
|
(mlet* %store-monad ((os-drv (operating-system-derivation
|
|
os
|
|
#:container? #t)))
|
|
|
|
(define script
|
|
(with-imported-modules (source-module-closure
|
|
'((guix build utils)
|
|
(gnu build linux-container)))
|
|
#~(begin
|
|
(use-modules (gnu build linux-container)
|
|
(gnu system file-systems) ;spec->file-system
|
|
(guix build utils))
|
|
|
|
(call-with-container (map spec->file-system '#$specs)
|
|
(lambda ()
|
|
(setenv "HOME" "/root")
|
|
(setenv "TMPDIR" "/tmp")
|
|
(setenv "GUIX_NEW_SYSTEM" #$os-drv)
|
|
(for-each mkdir-p '("/run" "/bin" "/etc" "/home" "/var"))
|
|
(primitive-load (string-append #$os-drv "/boot")))
|
|
;; A range of 65536 uid/gids is used to cover 16 bits worth of
|
|
;; users and groups, which is sufficient for most cases.
|
|
;;
|
|
;; See: http://www.freedesktop.org/software/systemd/man/systemd-nspawn.html#--private-users=
|
|
#:host-uids 65536))))
|
|
|
|
(gexp->script "run-container" script))))
|