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* gnu/system/linux-container.scm: New file. * gnu-system.am (GNU_SYSTEM_MODULES): Add it. * gnu/system.scm: Export 'operating-system-etc-directory', 'operating-system-boot-script', 'operating-system-locale-directory', and 'file-union'. (operating-system-boot-script): Add #:container? keyword argument. (operating-system-activation-script): Add #:container? keyword argument. Don't call 'activate-firmware' or 'activate-ptrace-attach' when activating a container.wip-container
David Thompson
7 years ago
committed by
David Thompson
David Thompson
3 changed files with 140 additions and 10 deletions
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;;; GNU Guix --- Functional package management for GNU |
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;;; Copyright © 2015 David Thompson <davet@gnu.org> |
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;;; |
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;;; This file is part of GNU Guix. |
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;;; |
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;;; GNU Guix is free software; you can redistribute it and/or modify it |
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;;; under the terms of the GNU General Public License as published by |
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;;; the Free Software Foundation; either version 3 of the License, or (at |
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;;; your option) any later version. |
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;;; |
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;;; GNU Guix is distributed in the hope that it will be useful, but |
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of |
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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;;; GNU General Public License for more details. |
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;;; |
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;;; You should have received a copy of the GNU General Public License |
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. |
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|
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(define-module (gnu system linux-container) |
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#:use-module (ice-9 match) |
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#:use-module (srfi srfi-1) |
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#:use-module (guix config) |
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#:use-module (guix store) |
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#:use-module (guix gexp) |
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#:use-module (guix derivations) |
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#:use-module (guix monads) |
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#:use-module (gnu build linux-container) |
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#:use-module (gnu system) |
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#:use-module (gnu system file-systems) |
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#:export (mapping->file-system |
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system-container |
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containerized-operating-system |
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container-script)) |
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|
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(define (mapping->file-system mapping) |
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"Return a file system that realizes MAPPING." |
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(match mapping |
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(($ <file-system-mapping> source target writable?) |
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(file-system |
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(mount-point target) |
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(device source) |
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(type "none") |
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(flags (if writable? |
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'(bind-mount) |
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'(bind-mount read-only))) |
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(check? #f) |
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(create-mount-point? #t))))) |
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|
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(define (system-container os) |
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"Return a derivation that builds OS as a Linux container." |
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(mlet* %store-monad |
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((profile (operating-system-profile os)) |
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(etc (operating-system-etc-directory os)) |
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(boot (operating-system-boot-script os #:container? #t)) |
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(locale (operating-system-locale-directory os))) |
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(file-union "system-container" |
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`(("boot" ,#~#$boot) |
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("profile" ,#~#$profile) |
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("locale" ,#~#$locale) |
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("etc" ,#~#$etc))))) |
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|
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(define (containerized-operating-system os mappings) |
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"Return an operating system based on OS for use in a Linux container |
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environment. MAPPINGS is a list of <file-system-mapping> to realize in the |
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containerized OS." |
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(define user-file-systems |
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(remove (lambda (fs) |
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(let ((target (file-system-mount-point fs)) |
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(source (file-system-device fs))) |
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(or (string=? target (%store-prefix)) |
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(string=? target "/") |
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(string-prefix? "/dev/" source) |
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(string-prefix? "/dev" target) |
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(string-prefix? "/sys" target)))) |
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(operating-system-file-systems os))) |
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|
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(define (mapping->fs fs) |
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(file-system (inherit (mapping->file-system fs)) |
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(needed-for-boot? #t))) |
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(operating-system (inherit os) |
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(swap-devices '()) ; disable swap |
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(file-systems (append (map mapping->fs (cons %store-mapping mappings)) |
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%container-file-systems |
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user-file-systems)))) |
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|
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(define* (container-script os #:key (mappings '())) |
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"Return a derivation of a script that runs OS as a Linux container. |
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MAPPINGS is a list of <file-system> objects that specify the files/directories |
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that will be shared with the host system." |
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(let* ((os (containerized-operating-system os mappings)) |
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(file-systems (filter file-system-needed-for-boot? |
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(operating-system-file-systems os))) |
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(specs (map file-system->spec file-systems))) |
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(mlet* %store-monad ((os-drv (system-container os))) |
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(define script |
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#~(begin |
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(use-modules (gnu build linux-container) |
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(guix build utils)) |
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(call-with-container '#$specs |
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(lambda () |
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(setenv "HOME" "/root") |
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(setenv "TMPDIR" "/tmp") |
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(setenv "GUIX_NEW_SYSTEM" #$os-drv) |
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(for-each mkdir-p '("/run" "/bin" "/etc" "/home" "/var")) |
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(primitive-load (string-append #$os-drv "/boot")))))) |
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(gexp->script "run-container" script |
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#:modules '((ice-9 match) |
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(srfi srfi-98) |
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(guix config) |
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(guix utils) |
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(guix build utils) |
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(guix build syscalls) |
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(gnu build file-systems) |
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(gnu build linux-container)))))) |
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