1 ;;; GNU Guix --- Functional package management for GNU
2 ;;; Copyright © 2015 David Thompson <davet@gnu.org>
4 ;;; This file is part of GNU Guix.
6 ;;; GNU Guix is free software; you can redistribute it and/or modify it
7 ;;; under the terms of the GNU General Public License as published by
8 ;;; the Free Software Foundation; either version 3 of the License, or (at
9 ;;; your option) any later version.
11 ;;; GNU Guix is distributed in the hope that it will be useful, but
12 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ;;; GNU General Public License for more details.
16 ;;; You should have received a copy of the GNU General Public License
17 ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
19 (define-module (test-containers)
20 #:use-module (guix utils)
21 #:use-module (guix build syscalls)
22 #:use-module (gnu build linux-container)
23 #:use-module (srfi srfi-64)
24 #:use-module (ice-9 match))
26 (define (assert-exit x)
27 (primitive-exit (if x 0 1)))
29 (test-begin "containers")
31 ;; Skip these tests unless user namespaces are available and the setgroups
32 ;; file (introduced in Linux 3.19 to address a security issue) exists.
33 (unless (and (user-namespace-supported?)
34 (unprivileged-user-namespace-supported?)
35 (setgroups-supported?))
38 (test-assert "call-with-container, exit with 0 when there is no error"
40 (call-with-container '() (const #t) #:namespaces '(user))))
42 (test-assert "call-with-container, user namespace"
44 (call-with-container '()
46 ;; The user is root within the new user namespace.
47 (assert-exit (and (zero? (getuid)) (zero? (getgid)))))
48 #:namespaces '(user))))
50 (test-assert "call-with-container, uts namespace"
52 (call-with-container '()
54 ;; The user is root within the container and should be able to change
55 ;; the hostname of that container.
56 (sethostname "test-container")
58 #:namespaces '(user uts))))
60 (test-assert "call-with-container, pid namespace"
62 (call-with-container '()
64 (match (primitive-fork)
66 ;; The first forked process in the new pid namespace is pid 2.
67 (assert-exit (= 2 (getpid))))
72 (status:exit-val status)))))))
73 #:namespaces '(user pid))))
75 (test-assert "call-with-container, mnt namespace"
77 (call-with-container '(("none" device "/testing" "tmpfs" () #f #f))
79 (assert-exit (file-exists? "/testing")))
80 #:namespaces '(user mnt))))
82 (test-equal "call-with-container, mnt namespace, wrong bind mount"
83 `(system-error ,ENOENT)
84 ;; An exception should be raised; see <http://bugs.gnu.org/23306>.
87 (call-with-container '(("/does-not-exist" device "/foo"
88 "none" (bind-mount) #f #f))
90 #:namespaces '(user mnt)))
92 (list 'system-error (system-error-errno args)))))
94 (test-assert "call-with-container, all namespaces"
96 (call-with-container '()
98 (primitive-exit 0)))))
100 (test-assert "container-excursion"
101 (call-with-temporary-directory
103 ;; Two pipes: One for the container to signal that the test can begin,
104 ;; and one for the parent to signal to the container that the test is
106 (match (list (pipe) (pipe))
107 (((start-in . start-out) (end-in . end-out))
111 ;; Signal for the test to start.
112 (write 'ready start-out)
114 ;; Wait for test completion.
118 (define (namespaces pid)
119 (let ((pid (number->string pid)))
121 (readlink (string-append "/proc/" pid "/ns/" ns)))
122 '("user" "ipc" "uts" "net" "pid" "mnt"))))
124 (let* ((pid (run-container root '() %namespaces 1 container))
125 (container-namespaces (namespaces pid))
129 ;; Wait for container to be ready.
132 (container-excursion pid
134 ;; Fork again so that the pid is within the context of
135 ;; the joined pid namespace instead of the original pid
137 (match (primitive-fork)
139 ;; Check that all of the namespace identifiers are
140 ;; the same as the container process.
142 (equal? container-namespaces
143 (namespaces (getpid)))))
145 (match (waitpid fork-pid)
148 (status:exit-val status)))))))))))
150 ;; Stop the container.
151 (write 'done end-out)