1137 lines
42 KiB
Scheme
1137 lines
42 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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||
;;; Copyright © 2017 Ryan Moe <ryan.moe@gmail.com>
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;;; Copyright © 2018, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2020,2021 Jan (janneke) Nieuwenhuizen <janneke@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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(define-module (gnu services virtualization)
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#:use-module (gnu bootloader)
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#:use-module (gnu bootloader grub)
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#:use-module (gnu image)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages gdb)
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#:use-module (gnu packages package-management)
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#:use-module (gnu packages ssh)
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||
#:use-module (gnu packages virtualization)
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#:use-module (gnu services base)
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#:use-module (gnu services configuration)
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#:use-module (gnu services dbus)
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#:use-module (gnu services shepherd)
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#:use-module (gnu services ssh)
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#:use-module (gnu services)
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#:use-module (gnu system file-systems)
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#:use-module (gnu system hurd)
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#:use-module (gnu system image)
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#:use-module (gnu system shadow)
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||
#:use-module (gnu system)
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#:use-module (guix derivations)
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||
#:use-module (guix gexp)
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||
#:use-module (guix modules)
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||
#:use-module (guix monads)
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||
#:use-module (guix packages)
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#:use-module (guix records)
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#:use-module (guix store)
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#:use-module (guix utils)
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||
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-26)
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#:use-module (rnrs bytevectors)
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#:use-module (ice-9 match)
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#:export (%hurd-vm-operating-system
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hurd-vm-configuration
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hurd-vm-configuration?
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hurd-vm-configuration-os
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hurd-vm-configuration-qemu
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hurd-vm-configuration-image
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hurd-vm-configuration-disk-size
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hurd-vm-configuration-memory-size
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hurd-vm-configuration-options
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hurd-vm-configuration-id
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hurd-vm-configuration-net-options
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hurd-vm-configuration-secrets
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hurd-vm-disk-image
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hurd-vm-port
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hurd-vm-net-options
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hurd-vm-service-type
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libvirt-configuration
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libvirt-service-type
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virtlog-configuration
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virtlog-service-type
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%qemu-platforms
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lookup-qemu-platforms
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qemu-platform?
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qemu-platform-name
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qemu-binfmt-configuration
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qemu-binfmt-configuration?
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qemu-binfmt-service-type))
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||
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(define (uglify-field-name field-name)
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(let ((str (symbol->string field-name)))
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(string-join
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(string-split (string-delete #\? str) #\-)
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"_")))
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||
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(define (quote-val val)
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(string-append "\"" val "\""))
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(define (serialize-field field-name val)
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(format #t "~a = ~a\n" (uglify-field-name field-name) val))
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(define (serialize-string field-name val)
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(serialize-field field-name (quote-val val)))
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||
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(define (serialize-boolean field-name val)
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(serialize-field field-name (if val 1 0)))
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(define (serialize-integer field-name val)
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(serialize-field field-name val))
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||
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(define (build-opt-list val)
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(string-append
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"["
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(string-join (map quote-val val) ",")
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"]"))
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||
|
||
(define optional-list? list?)
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(define optional-string? string?)
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(define (serialize-list field-name val)
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(serialize-field field-name (build-opt-list val)))
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||
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(define (serialize-optional-list field-name val)
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(if (null? val)
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(format #t "# ~a = []\n" (uglify-field-name field-name))
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(serialize-list field-name val)))
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(define (serialize-optional-string field-name val)
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(if (string-null? val)
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(format #t "# ~a = \"\"\n" (uglify-field-name field-name))
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(serialize-string field-name val)))
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(define-configuration libvirt-configuration
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(libvirt
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(package libvirt)
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"Libvirt package.")
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(listen-tls?
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(boolean #t)
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"Flag listening for secure TLS connections on the public TCP/IP port.
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must set @code{listen} for this to have any effect.
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It is necessary to setup a CA and issue server certificates before
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using this capability.")
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(listen-tcp?
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(boolean #f)
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"Listen for unencrypted TCP connections on the public TCP/IP port.
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must set @code{listen} for this to have any effect.
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Using the TCP socket requires SASL authentication by default. Only
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SASL mechanisms which support data encryption are allowed. This is
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DIGEST_MD5 and GSSAPI (Kerberos5)")
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(tls-port
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(string "16514")
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"Port for accepting secure TLS connections This can be a port number,
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or service name")
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(tcp-port
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(string "16509")
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"Port for accepting insecure TCP connections This can be a port number,
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or service name")
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(listen-addr
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(string "0.0.0.0")
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"IP address or hostname used for client connections.")
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(mdns-adv?
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(boolean #f)
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"Flag toggling mDNS advertisement of the libvirt service.
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Alternatively can disable for all services on a host by
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stopping the Avahi daemon.")
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(mdns-name
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(string (string-append "Virtualization Host " (gethostname)))
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"Default mDNS advertisement name. This must be unique on the
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immediate broadcast network.")
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(unix-sock-group
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(string "root")
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"UNIX domain socket group ownership. This can be used to
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allow a 'trusted' set of users access to management capabilities
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without becoming root.")
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(unix-sock-ro-perms
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(string "0777")
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"UNIX socket permissions for the R/O socket. This is used
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for monitoring VM status only.")
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(unix-sock-rw-perms
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(string "0770")
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"UNIX socket permissions for the R/W socket. Default allows
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only root. If PolicyKit is enabled on the socket, the default
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will change to allow everyone (eg, 0777)")
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(unix-sock-admin-perms
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(string "0777")
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"UNIX socket permissions for the admin socket. Default allows
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only owner (root), do not change it unless you are sure to whom
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you are exposing the access to.")
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(unix-sock-dir
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(string "/var/run/libvirt")
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"The directory in which sockets will be found/created.")
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(auth-unix-ro
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(string "polkit")
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"Authentication scheme for UNIX read-only sockets. By default
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socket permissions allow anyone to connect")
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(auth-unix-rw
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(string "polkit")
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"Authentication scheme for UNIX read-write sockets. By default
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socket permissions only allow root. If PolicyKit support was compiled
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into libvirt, the default will be to use 'polkit' auth.")
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(auth-tcp
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(string "sasl")
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"Authentication scheme for TCP sockets. If you don't enable SASL,
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then all TCP traffic is cleartext. Don't do this outside of a dev/test
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scenario.")
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(auth-tls
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(string "none")
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"Authentication scheme for TLS sockets. TLS sockets already have
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encryption provided by the TLS layer, and limited authentication is
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done by certificates.
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It is possible to make use of any SASL authentication mechanism as
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well, by using 'sasl' for this option")
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(access-drivers
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(optional-list '())
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"API access control scheme.
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By default an authenticated user is allowed access to all APIs. Access
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drivers can place restrictions on this.")
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(key-file
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(string "")
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"Server key file path. If set to an empty string, then no private key
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is loaded.")
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(cert-file
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(string "")
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"Server key file path. If set to an empty string, then no certificate
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is loaded.")
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(ca-file
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(string "")
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"Server key file path. If set to an empty string, then no CA certificate
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is loaded.")
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(crl-file
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(string "")
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"Certificate revocation list path. If set to an empty string, then no
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CRL is loaded.")
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(tls-no-sanity-cert
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(boolean #f)
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"Disable verification of our own server certificates.
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When libvirtd starts it performs some sanity checks against its own
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certificates.")
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(tls-no-verify-cert
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(boolean #f)
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"Disable verification of client certificates.
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Client certificate verification is the primary authentication mechanism.
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Any client which does not present a certificate signed by the CA
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will be rejected.")
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(tls-allowed-dn-list
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||
(optional-list '())
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"Whitelist of allowed x509 Distinguished Name.")
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||
(sasl-allowed-usernames
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||
(optional-list '())
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||
"Whitelist of allowed SASL usernames. The format for username
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depends on the SASL authentication mechanism.")
|
||
(tls-priority
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(string "NORMAL")
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||
"Override the compile time default TLS priority string. The
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default is usually \"NORMAL\" unless overridden at build time.
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Only set this is it is desired for libvirt to deviate from
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the global default settings.")
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||
(max-clients
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(integer 5000)
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||
"Maximum number of concurrent client connections to allow
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over all sockets combined.")
|
||
(max-queued-clients
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||
(integer 1000)
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||
"Maximum length of queue of connections waiting to be
|
||
accepted by the daemon. Note, that some protocols supporting
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||
retransmission may obey this so that a later reattempt at
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connection succeeds.")
|
||
(max-anonymous-clients
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||
(integer 20)
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||
"Maximum length of queue of accepted but not yet authenticated
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clients. Set this to zero to turn this feature off")
|
||
(min-workers
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||
(integer 5)
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"Number of workers to start up initially.")
|
||
(max-workers
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||
(integer 20)
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"Maximum number of worker threads.
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||
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If the number of active clients exceeds @code{min-workers},
|
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then more threads are spawned, up to max_workers limit.
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||
Typically you'd want max_workers to equal maximum number
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of clients allowed.")
|
||
(prio-workers
|
||
(integer 5)
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"Number of priority workers. If all workers from above
|
||
pool are stuck, some calls marked as high priority
|
||
(notably domainDestroy) can be executed in this pool.")
|
||
(max-requests
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||
(integer 20)
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"Total global limit on concurrent RPC calls.")
|
||
(max-client-requests
|
||
(integer 5)
|
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"Limit on concurrent requests from a single client
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||
connection. To avoid one client monopolizing the server
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||
this should be a small fraction of the global max_requests
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and max_workers parameter.")
|
||
(admin-min-workers
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||
(integer 1)
|
||
"Same as @code{min-workers} but for the admin interface.")
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||
(admin-max-workers
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(integer 5)
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"Same as @code{max-workers} but for the admin interface.")
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(admin-max-clients
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(integer 5)
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"Same as @code{max-clients} but for the admin interface.")
|
||
(admin-max-queued-clients
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(integer 5)
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"Same as @code{max-queued-clients} but for the admin interface.")
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||
(admin-max-client-requests
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||
(integer 5)
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"Same as @code{max-client-requests} but for the admin interface.")
|
||
(log-level
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||
(integer 3)
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"Logging level. 4 errors, 3 warnings, 2 information, 1 debug.")
|
||
(log-filters
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||
(string "3:remote 4:event")
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||
"Logging filters.
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||
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||
A filter allows selecting a different logging level for a given category
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of logs
|
||
The format for a filter is one of:
|
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@itemize
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@item x:name
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||
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@item x:+name
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@end itemize
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||
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where @code{name} is a string which is matched against the category
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given in the @code{VIR_LOG_INIT()} at the top of each libvirt source
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file, e.g., \"remote\", \"qemu\", or \"util.json\" (the name in the
|
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filter can be a substring of the full category name, in order
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to match multiple similar categories), the optional \"+\" prefix
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tells libvirt to log stack trace for each message matching
|
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name, and @code{x} is the minimal level where matching messages should
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be logged:
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||
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||
@itemize
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||
@item 1: DEBUG
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||
@item 2: INFO
|
||
@item 3: WARNING
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||
@item 4: ERROR
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||
@end itemize
|
||
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||
Multiple filters can be defined in a single filters statement, they just
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need to be separated by spaces.")
|
||
(log-outputs
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||
(string "3:syslog:libvirtd")
|
||
"Logging outputs.
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||
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||
An output is one of the places to save logging information
|
||
The format for an output can be:
|
||
|
||
@table @code
|
||
@item x:stderr
|
||
output goes to stderr
|
||
|
||
@item x:syslog:name
|
||
use syslog for the output and use the given name as the ident
|
||
|
||
@item x:file:file_path
|
||
output to a file, with the given filepath
|
||
|
||
@item x:journald
|
||
output to journald logging system
|
||
@end table
|
||
|
||
In all case the x prefix is the minimal level, acting as a filter
|
||
|
||
@itemize
|
||
@item 1: DEBUG
|
||
@item 2: INFO
|
||
@item 3: WARNING
|
||
@item 4: ERROR
|
||
@end itemize
|
||
|
||
Multiple outputs can be defined, they just need to be separated by spaces.")
|
||
(audit-level
|
||
(integer 1)
|
||
"Allows usage of the auditing subsystem to be altered
|
||
|
||
@itemize
|
||
@item 0: disable all auditing
|
||
@item 1: enable auditing, only if enabled on host
|
||
@item 2: enable auditing, and exit if disabled on host.
|
||
@end itemize
|
||
")
|
||
(audit-logging
|
||
(boolean #f)
|
||
"Send audit messages via libvirt logging infrastructure.")
|
||
(host-uuid
|
||
(optional-string "")
|
||
"Host UUID. UUID must not have all digits be the same.")
|
||
(host-uuid-source
|
||
(string "smbios")
|
||
"Source to read host UUID.
|
||
|
||
@itemize
|
||
|
||
@item @code{smbios}: fetch the UUID from @code{dmidecode -s system-uuid}
|
||
|
||
@item @code{machine-id}: fetch the UUID from @code{/etc/machine-id}
|
||
|
||
@end itemize
|
||
|
||
If @code{dmidecode} does not provide a valid UUID a temporary UUID
|
||
will be generated.")
|
||
(keepalive-interval
|
||
(integer 5)
|
||
"A keepalive message is sent to a client after
|
||
@code{keepalive_interval} seconds of inactivity to check if
|
||
the client is still responding. If set to -1, libvirtd will
|
||
never send keepalive requests; however clients can still send
|
||
them and the daemon will send responses.")
|
||
(keepalive-count
|
||
(integer 5)
|
||
"Maximum number of keepalive messages that are allowed to be sent
|
||
to the client without getting any response before the connection is
|
||
considered broken.
|
||
|
||
In other words, the connection is automatically
|
||
closed approximately after
|
||
@code{keepalive_interval * (keepalive_count + 1)} seconds since the last
|
||
message received from the client. When @code{keepalive-count} is
|
||
set to 0, connections will be automatically closed after
|
||
@code{keepalive-interval} seconds of inactivity without sending any
|
||
keepalive messages.")
|
||
(admin-keepalive-interval
|
||
(integer 5)
|
||
"Same as above but for admin interface.")
|
||
(admin-keepalive-count
|
||
(integer 5)
|
||
"Same as above but for admin interface.")
|
||
(ovs-timeout
|
||
(integer 5)
|
||
"Timeout for Open vSwitch calls.
|
||
|
||
The @code{ovs-vsctl} utility is used for the configuration and
|
||
its timeout option is set by default to 5 seconds to avoid
|
||
potential infinite waits blocking libvirt."))
|
||
|
||
(define* (libvirt-conf-file config)
|
||
"Return a libvirtd config file."
|
||
(plain-file "libvirtd.conf"
|
||
(with-output-to-string
|
||
(lambda ()
|
||
(serialize-configuration config libvirt-configuration-fields)))))
|
||
|
||
(define %libvirt-accounts
|
||
(list (user-group (name "libvirt") (system? #t))))
|
||
|
||
(define (%libvirt-activation config)
|
||
(let ((sock-dir (libvirt-configuration-unix-sock-dir config)))
|
||
#~(begin
|
||
(use-modules (guix build utils))
|
||
(mkdir-p #$sock-dir))))
|
||
|
||
|
||
(define (libvirt-shepherd-service config)
|
||
(let* ((config-file (libvirt-conf-file config))
|
||
(libvirt (libvirt-configuration-libvirt config)))
|
||
(list (shepherd-service
|
||
(documentation "Run the libvirt daemon.")
|
||
(provision '(libvirtd))
|
||
(start #~(make-forkexec-constructor
|
||
(list (string-append #$libvirt "/sbin/libvirtd")
|
||
"-f" #$config-file)
|
||
;; For finding qemu and ip binaries.
|
||
#:environment-variables
|
||
(list (string-append
|
||
"PATH=/run/current-system/profile/bin:"
|
||
"/run/current-system/profile/sbin"))))
|
||
(stop #~(make-kill-destructor))))))
|
||
|
||
(define libvirt-service-type
|
||
(service-type (name 'libvirt)
|
||
(extensions
|
||
(list
|
||
(service-extension polkit-service-type
|
||
(compose list libvirt-configuration-libvirt))
|
||
(service-extension profile-service-type
|
||
(lambda (config)
|
||
(list
|
||
(libvirt-configuration-libvirt config)
|
||
qemu)))
|
||
(service-extension activation-service-type
|
||
%libvirt-activation)
|
||
(service-extension shepherd-root-service-type
|
||
libvirt-shepherd-service)
|
||
(service-extension account-service-type
|
||
(const %libvirt-accounts))))
|
||
(default-value (libvirt-configuration))))
|
||
|
||
|
||
(define-record-type* <virtlog-configuration>
|
||
virtlog-configuration make-virtlog-configuration
|
||
virtlog-configuration?
|
||
(libvirt virtlog-configuration-libvirt
|
||
(default libvirt))
|
||
(log-level virtlog-configuration-log-level
|
||
(default 3))
|
||
(log-filters virtlog-configuration-log-filters
|
||
(default "3:remote 4:event"))
|
||
(log-outputs virtlog-configuration-log-outputs
|
||
(default "3:syslog:virtlogd"))
|
||
(max-clients virtlog-configuration-max-clients
|
||
(default 1024))
|
||
(max-size virtlog-configuration-max-size
|
||
(default 2097152)) ;; 2MB
|
||
(max-backups virtlog-configuration-max-backups
|
||
(default 3)))
|
||
|
||
(define* (virtlogd-conf-file config)
|
||
"Return a virtlogd config file."
|
||
(plain-file "virtlogd.conf"
|
||
(string-append
|
||
"log_level = " (number->string (virtlog-configuration-log-level config)) "\n"
|
||
"log_filters = \"" (virtlog-configuration-log-filters config) "\"\n"
|
||
"log_outputs = \"" (virtlog-configuration-log-outputs config) "\"\n"
|
||
"max_clients = " (number->string (virtlog-configuration-max-clients config)) "\n"
|
||
"max_size = " (number->string (virtlog-configuration-max-size config)) "\n"
|
||
"max_backups = " (number->string (virtlog-configuration-max-backups config)) "\n")))
|
||
|
||
(define (virtlogd-shepherd-service config)
|
||
(let* ((config-file (virtlogd-conf-file config))
|
||
(libvirt (virtlog-configuration-libvirt config)))
|
||
(list (shepherd-service
|
||
(documentation "Run the virtlog daemon.")
|
||
(provision '(virtlogd))
|
||
(start #~(make-forkexec-constructor
|
||
(list (string-append #$libvirt "/sbin/virtlogd")
|
||
"-f" #$config-file)))
|
||
(stop #~(make-kill-destructor))))))
|
||
|
||
(define virtlog-service-type
|
||
(service-type (name 'virtlogd)
|
||
(extensions
|
||
(list
|
||
(service-extension shepherd-root-service-type
|
||
virtlogd-shepherd-service)))
|
||
(default-value (virtlog-configuration))))
|
||
|
||
(define (generate-libvirt-documentation)
|
||
(generate-documentation
|
||
`((libvirt-configuration ,libvirt-configuration-fields))
|
||
'libvirt-configuration))
|
||
|
||
|
||
;;;
|
||
;;; Transparent QEMU emulation via binfmt_misc.
|
||
;;;
|
||
|
||
;; Platforms that QEMU can emulate.
|
||
(define-record-type* <qemu-platform>
|
||
qemu-platform make-qemu-platform
|
||
qemu-platform?
|
||
(name qemu-platform-name) ;string
|
||
(family qemu-platform-family) ;string
|
||
(magic qemu-platform-magic) ;bytevector
|
||
(mask qemu-platform-mask) ;bytevector
|
||
|
||
;; Default flags:
|
||
;;
|
||
;; "F": fix binary. Open the qemu-user binary (statically linked) as soon
|
||
;; as binfmt_misc interpretation is handled.
|
||
;;
|
||
;; "P": preserve argv[0]. QEMU 6.0 detects whether it's started with this
|
||
;; flag and automatically does the right thing. Without this flag,
|
||
;; argv[0] is replaced by the absolute file name of the executable, an
|
||
;; observable difference that can cause discrepancies.
|
||
(flags qemu-platform-flags (default "FP"))) ;string
|
||
|
||
(define-syntax bv
|
||
(lambda (s)
|
||
"Expand the given string into a bytevector."
|
||
(syntax-case s ()
|
||
((_ str)
|
||
(string? (syntax->datum #'str))
|
||
(let ((bv (u8-list->bytevector
|
||
(map char->integer
|
||
(string->list (syntax->datum #'str))))))
|
||
bv)))))
|
||
|
||
;;; The platform descriptions below are taken from
|
||
;;; 'scripts/qemu-binfmt-conf.sh' in QEMU.
|
||
|
||
(define %i386
|
||
(qemu-platform
|
||
(name "i386")
|
||
(family "i386")
|
||
(magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %alpha
|
||
(qemu-platform
|
||
(name "alpha")
|
||
(family "alpha")
|
||
(magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %arm
|
||
(qemu-platform
|
||
(name "arm")
|
||
(family "arm")
|
||
(magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %armeb
|
||
(qemu-platform
|
||
(name "armeb")
|
||
(family "arm")
|
||
(magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %sparc
|
||
(qemu-platform
|
||
(name "sparc")
|
||
(family "sparc")
|
||
(magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %sparc32plus
|
||
(qemu-platform
|
||
(name "sparc32plus")
|
||
(family "sparc")
|
||
(magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %ppc
|
||
(qemu-platform
|
||
(name "ppc")
|
||
(family "ppc")
|
||
(magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %ppc64
|
||
(qemu-platform
|
||
(name "ppc64")
|
||
(family "ppc")
|
||
(magic (bv "\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %ppc64le
|
||
(qemu-platform
|
||
(name "ppc64le")
|
||
(family "ppcle")
|
||
(magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00"))))
|
||
|
||
(define %m68k
|
||
(qemu-platform
|
||
(name "m68k")
|
||
(family "m68k")
|
||
(magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
;; XXX: We could use the other endianness on a MIPS host.
|
||
(define %mips
|
||
(qemu-platform
|
||
(name "mips")
|
||
(family "mips")
|
||
(magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %mipsel
|
||
(qemu-platform
|
||
(name "mipsel")
|
||
(family "mips")
|
||
(magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %mipsn32
|
||
(qemu-platform
|
||
(name "mipsn32")
|
||
(family "mips")
|
||
(magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %mipsn32el
|
||
(qemu-platform
|
||
(name "mipsn32el")
|
||
(family "mips")
|
||
(magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %mips64
|
||
(qemu-platform
|
||
(name "mips64")
|
||
(family "mips")
|
||
(magic (bv "\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %mips64el
|
||
(qemu-platform
|
||
(name "mips64el")
|
||
(family "mips")
|
||
(magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %riscv32
|
||
(qemu-platform
|
||
(name "riscv32")
|
||
(family "riscv")
|
||
(magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %riscv64
|
||
(qemu-platform
|
||
(name "riscv64")
|
||
(family "riscv")
|
||
(magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %sh4
|
||
(qemu-platform
|
||
(name "sh4")
|
||
(family "sh4")
|
||
(magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %sh4eb
|
||
(qemu-platform
|
||
(name "sh4eb")
|
||
(family "sh4")
|
||
(magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %s390x
|
||
(qemu-platform
|
||
(name "s390x")
|
||
(family "s390x")
|
||
(magic (bv "\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %aarch64
|
||
(qemu-platform
|
||
(name "aarch64")
|
||
(family "arm")
|
||
(magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
|
||
|
||
(define %hppa
|
||
(qemu-platform
|
||
(name "hppa")
|
||
(family "hppa")
|
||
(magic (bv "\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x0f"))
|
||
(mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
|
||
|
||
(define %qemu-platforms
|
||
(list %i386 %alpha %arm %sparc32plus %ppc %ppc64 %ppc64le %m68k
|
||
%mips %mipsel %mipsn32 %mipsn32el %mips64 %mips64el
|
||
%riscv32 %riscv64 %sh4 %sh4eb %s390x %aarch64 %hppa))
|
||
|
||
(define (lookup-qemu-platforms . names)
|
||
"Return the list of QEMU platforms that match NAMES--a list of names such as
|
||
\"arm\", \"hppa\", etc."
|
||
(filter (lambda (platform)
|
||
(member (qemu-platform-name platform) names))
|
||
%qemu-platforms))
|
||
|
||
(define-record-type* <qemu-binfmt-configuration>
|
||
qemu-binfmt-configuration make-qemu-binfmt-configuration
|
||
qemu-binfmt-configuration?
|
||
(qemu qemu-binfmt-configuration-qemu
|
||
(default qemu))
|
||
(platforms qemu-binfmt-configuration-platforms
|
||
(default '()))) ;safest default
|
||
|
||
(define (qemu-platform->binfmt qemu platform)
|
||
"Return a gexp that evaluates to a binfmt string for PLATFORM, using the
|
||
given QEMU package."
|
||
(define (bytevector->binfmt-string bv)
|
||
;; Return a binfmt-friendly string representing BV. Hex-encode every
|
||
;; character, in particular because the doc notes "that you must escape
|
||
;; any NUL bytes; parsing halts at the first one".
|
||
(string-concatenate
|
||
(map (lambda (n)
|
||
(string-append "\\x"
|
||
(string-pad (number->string n 16) 2 #\0)))
|
||
(bytevector->u8-list bv))))
|
||
|
||
(match platform
|
||
(($ <qemu-platform> name family magic mask flags)
|
||
;; See 'Documentation/binfmt_misc.txt' in the kernel.
|
||
#~(string-append ":qemu-" #$name ":M::"
|
||
#$(bytevector->binfmt-string magic)
|
||
":" #$(bytevector->binfmt-string mask)
|
||
":" #$qemu:static "/bin/qemu-" #$name
|
||
":" #$flags))))
|
||
|
||
(define %binfmt-mount-point
|
||
(file-system-mount-point %binary-format-file-system))
|
||
|
||
(define %binfmt-register-file
|
||
(string-append %binfmt-mount-point "/register"))
|
||
|
||
(define qemu-binfmt-shepherd-services
|
||
(match-lambda
|
||
(($ <qemu-binfmt-configuration> qemu platforms)
|
||
(list (shepherd-service
|
||
(provision '(qemu-binfmt))
|
||
(documentation "Install binfmt_misc handlers for QEMU.")
|
||
(requirement '(file-system-/proc/sys/fs/binfmt_misc))
|
||
(start #~(lambda ()
|
||
;; Register the handlers for all of PLATFORMS.
|
||
(for-each (lambda (str)
|
||
(call-with-output-file
|
||
#$%binfmt-register-file
|
||
(lambda (port)
|
||
(display str port))))
|
||
(list
|
||
#$@(map (cut qemu-platform->binfmt qemu
|
||
<>)
|
||
platforms)))
|
||
#t))
|
||
(stop #~(lambda (_)
|
||
;; Unregister the handlers.
|
||
(for-each (lambda (name)
|
||
(let ((file (string-append
|
||
#$%binfmt-mount-point
|
||
"/qemu-" name)))
|
||
(call-with-output-file file
|
||
(lambda (port)
|
||
(display "-1" port)))))
|
||
'#$(map qemu-platform-name platforms))
|
||
#f)))))))
|
||
|
||
(define qemu-binfmt-service-type
|
||
;; TODO: Make a separate binfmt_misc service out of this?
|
||
(service-type (name 'qemu-binfmt)
|
||
(extensions
|
||
(list (service-extension file-system-service-type
|
||
(const
|
||
(list %binary-format-file-system)))
|
||
(service-extension shepherd-root-service-type
|
||
qemu-binfmt-shepherd-services)))
|
||
(default-value (qemu-binfmt-configuration))
|
||
(description
|
||
"This service supports transparent emulation of binaries
|
||
compiled for other architectures using QEMU and the @code{binfmt_misc}
|
||
functionality of the kernel Linux.")))
|
||
|
||
|
||
;;;
|
||
;;; Secrets for guest VMs.
|
||
;;;
|
||
|
||
(define (secret-service-activation port)
|
||
"Return an activation snippet that fetches sensitive material at local PORT,
|
||
over TCP. Reboot upon failure."
|
||
(with-imported-modules '((gnu build secret-service)
|
||
(guix build utils))
|
||
#~(begin
|
||
(use-modules (gnu build secret-service))
|
||
(let ((sent (secret-service-receive-secrets #$port)))
|
||
(unless sent
|
||
(sleep 3)
|
||
(reboot))))))
|
||
|
||
(define secret-service-type
|
||
(service-type
|
||
(name 'secret-service)
|
||
(extensions (list (service-extension activation-service-type
|
||
secret-service-activation)))
|
||
(description
|
||
"This service fetches secret key and other sensitive material over TCP at
|
||
boot time. This service is meant to be used by virtual machines (VMs) that
|
||
can only be accessed by their host.")))
|
||
|
||
(define (secret-service-operating-system os)
|
||
"Return an operating system based on OS that includes the secret-service,
|
||
that will be listening to receive secret keys on port 1004, TCP."
|
||
(operating-system
|
||
(inherit os)
|
||
;; Arrange so that the secret service activation snippet shows up before
|
||
;; the OpenSSH and Guix activation snippets. That way, we receive OpenSSH
|
||
;; and Guix keys before the activation snippets try to generate fresh keys
|
||
;; for nothing.
|
||
(services (append (operating-system-user-services os)
|
||
(list (service secret-service-type 1004))))))
|
||
|
||
|
||
;;;
|
||
;;; The Hurd in VM service: a Childhurd.
|
||
;;;
|
||
|
||
(define %hurd-vm-operating-system
|
||
(operating-system
|
||
(inherit %hurd-default-operating-system)
|
||
(host-name "childhurd")
|
||
(timezone "Europe/Amsterdam")
|
||
(bootloader (bootloader-configuration
|
||
(bootloader grub-minimal-bootloader)
|
||
(targets '("/dev/vda"))
|
||
(timeout 0)))
|
||
(packages (cons* gdb-minimal
|
||
(operating-system-packages
|
||
%hurd-default-operating-system)))
|
||
(services (cons*
|
||
(service openssh-service-type
|
||
(openssh-configuration
|
||
(openssh openssh-sans-x)
|
||
(use-pam? #f)
|
||
(port-number 2222)
|
||
(permit-root-login #t)
|
||
(allow-empty-passwords? #t)
|
||
(password-authentication? #t)))
|
||
|
||
;; By default, the secret service introduces a pre-initialized
|
||
;; /etc/guix/acl file in the childhurd. Thus, clear
|
||
;; 'authorize-key?' so that it's not overridden at activation
|
||
;; time.
|
||
(modify-services %base-services/hurd
|
||
(guix-service-type config =>
|
||
(guix-configuration
|
||
(inherit config)
|
||
(authorize-key? #f))))))))
|
||
|
||
(define-record-type* <hurd-vm-configuration>
|
||
hurd-vm-configuration make-hurd-vm-configuration
|
||
hurd-vm-configuration?
|
||
(os hurd-vm-configuration-os ;<operating-system>
|
||
(default %hurd-vm-operating-system))
|
||
(qemu hurd-vm-configuration-qemu ;<package>
|
||
(default qemu-minimal))
|
||
(image hurd-vm-configuration-image ;string
|
||
(thunked)
|
||
(default (hurd-vm-disk-image this-record)))
|
||
(disk-size hurd-vm-configuration-disk-size ;number or 'guess
|
||
(default 'guess))
|
||
(memory-size hurd-vm-configuration-memory-size ;number
|
||
(default 512))
|
||
(options hurd-vm-configuration-options ;list of string
|
||
(default `("--snapshot")))
|
||
(id hurd-vm-configuration-id ;#f or integer [1..]
|
||
(default #f))
|
||
(net-options hurd-vm-configuration-net-options ;list of string
|
||
(thunked)
|
||
(default (hurd-vm-net-options this-record)))
|
||
(secret-root hurd-vm-configuration-secret-root ;string
|
||
(default "/etc/childhurd")))
|
||
|
||
(define (hurd-vm-disk-image config)
|
||
"Return a disk-image for the Hurd according to CONFIG. The secret-service
|
||
is added to the OS specified in CONFIG."
|
||
(let* ((os (secret-service-operating-system
|
||
(hurd-vm-configuration-os config)))
|
||
(disk-size (hurd-vm-configuration-disk-size config))
|
||
(type (lookup-image-type-by-name 'hurd-qcow2))
|
||
(os->image (image-type-constructor type)))
|
||
(system-image
|
||
(image (inherit (os->image os))
|
||
(size disk-size)))))
|
||
|
||
(define (hurd-vm-port config base)
|
||
"Return the forwarded vm port for this childhurd config."
|
||
(let ((id (or (hurd-vm-configuration-id config) 0)))
|
||
(+ base (* 1000 id))))
|
||
(define %hurd-vm-secrets-port 11004)
|
||
(define %hurd-vm-ssh-port 10022)
|
||
(define %hurd-vm-vnc-port 15900)
|
||
|
||
(define (hurd-vm-net-options config)
|
||
`("--device" "rtl8139,netdev=net0"
|
||
"--netdev"
|
||
,(string-append "user,id=net0"
|
||
",hostfwd=tcp:127.0.0.1:"
|
||
(number->string (hurd-vm-port config %hurd-vm-secrets-port))
|
||
"-:1004"
|
||
",hostfwd=tcp:127.0.0.1:"
|
||
(number->string (hurd-vm-port config %hurd-vm-ssh-port))
|
||
"-:2222"
|
||
",hostfwd=tcp:127.0.0.1:"
|
||
(number->string (hurd-vm-port config %hurd-vm-vnc-port))
|
||
"-:5900")))
|
||
|
||
(define (hurd-vm-shepherd-service config)
|
||
"Return a <shepherd-service> for a Hurd in a Virtual Machine with CONFIG."
|
||
|
||
(let ((image (hurd-vm-configuration-image config))
|
||
(qemu (hurd-vm-configuration-qemu config))
|
||
(memory-size (hurd-vm-configuration-memory-size config))
|
||
(options (hurd-vm-configuration-options config))
|
||
(id (hurd-vm-configuration-id config))
|
||
(net-options (hurd-vm-configuration-net-options config))
|
||
(provisions '(hurd-vm childhurd)))
|
||
|
||
(define vm-command
|
||
#~(append (list #$(file-append qemu "/bin/qemu-system-i386")
|
||
"-m" (number->string #$memory-size)
|
||
#$@net-options
|
||
#$@options
|
||
"--hda" #+image
|
||
|
||
;; Cause the service to be respawned if the guest
|
||
;; reboots (it can reboot for instance if it did not
|
||
;; receive valid secrets, or if it crashed.)
|
||
"--no-reboot")
|
||
(if (file-exists? "/dev/kvm")
|
||
'("--enable-kvm")
|
||
'())))
|
||
|
||
(list
|
||
(shepherd-service
|
||
(documentation "Run the Hurd in a Virtual Machine: a Childhurd.")
|
||
(provision (if id
|
||
(map
|
||
(cute symbol-append <>
|
||
(string->symbol (number->string id)))
|
||
provisions)
|
||
provisions))
|
||
(requirement '(loopback networking user-processes))
|
||
(start
|
||
(with-imported-modules
|
||
(source-module-closure '((gnu build secret-service)
|
||
(guix build utils)))
|
||
#~(lambda ()
|
||
(let ((pid (fork+exec-command #$vm-command
|
||
#:user "childhurd"
|
||
;; XXX TODO: use "childhurd" after
|
||
;; updating Shepherd
|
||
#:group "kvm"
|
||
#:environment-variables
|
||
;; QEMU tries to write to /var/tmp
|
||
;; by default.
|
||
'("TMPDIR=/tmp")))
|
||
(port #$(hurd-vm-port config %hurd-vm-secrets-port))
|
||
(root #$(hurd-vm-configuration-secret-root config)))
|
||
(catch #t
|
||
(lambda _
|
||
;; XXX: 'secret-service-send-secrets' won't complete until
|
||
;; the guest has booted and its secret service server is
|
||
;; running, which could take 20+ seconds during which PID 1
|
||
;; is stuck waiting.
|
||
(if (secret-service-send-secrets port root)
|
||
pid
|
||
(begin
|
||
(kill (- pid) SIGTERM)
|
||
#f)))
|
||
(lambda (key . args)
|
||
(kill (- pid) SIGTERM)
|
||
(apply throw key args)))))))
|
||
(modules `((gnu build secret-service)
|
||
(guix build utils)
|
||
,@%default-modules))
|
||
(stop #~(make-kill-destructor))))))
|
||
|
||
(define %hurd-vm-accounts
|
||
(list (user-group (name "childhurd") (system? #t))
|
||
(user-account
|
||
(name "childhurd")
|
||
(group "childhurd")
|
||
(supplementary-groups '("kvm"))
|
||
(comment "Privilege separation user for the childhurd")
|
||
(home-directory "/var/empty")
|
||
(shell (file-append shadow "/sbin/nologin"))
|
||
(system? #t))))
|
||
|
||
(define (initialize-hurd-vm-substitutes)
|
||
"Initialize the Hurd VM's key pair and ACL and store it on the host."
|
||
(define run
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(ice-9 match))
|
||
|
||
(define host-key
|
||
"/etc/guix/signing-key.pub")
|
||
|
||
(define host-acl
|
||
"/etc/guix/acl")
|
||
|
||
(match (command-line)
|
||
((_ guest-config-directory)
|
||
(setenv "GUIX_CONFIGURATION_DIRECTORY"
|
||
guest-config-directory)
|
||
(invoke #+(file-append guix "/bin/guix") "archive"
|
||
"--generate-key")
|
||
|
||
(when (file-exists? host-acl)
|
||
;; Copy the host ACL.
|
||
(copy-file host-acl
|
||
(string-append guest-config-directory
|
||
"/acl")))
|
||
|
||
(when (file-exists? host-key)
|
||
;; Add the host key to the childhurd's ACL.
|
||
(let ((key (open-fdes host-key O_RDONLY)))
|
||
(close-fdes 0)
|
||
(dup2 key 0)
|
||
(execl #+(file-append guix "/bin/guix")
|
||
"guix" "archive" "--authorize"))))))))
|
||
|
||
(program-file "initialize-hurd-vm-substitutes" run))
|
||
|
||
(define (hurd-vm-activation config)
|
||
"Return a gexp to activate the Hurd VM according to CONFIG."
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils))
|
||
|
||
(define secret-directory
|
||
#$(hurd-vm-configuration-secret-root config))
|
||
|
||
(define ssh-directory
|
||
(string-append secret-directory "/etc/ssh"))
|
||
|
||
(define guix-directory
|
||
(string-append secret-directory "/etc/guix"))
|
||
|
||
(unless (file-exists? ssh-directory)
|
||
;; Generate SSH host keys under SSH-DIRECTORY.
|
||
(mkdir-p ssh-directory)
|
||
(invoke #$(file-append openssh "/bin/ssh-keygen")
|
||
"-A" "-f" secret-directory))
|
||
|
||
(unless (file-exists? guix-directory)
|
||
(invoke #$(initialize-hurd-vm-substitutes)
|
||
guix-directory)))))
|
||
|
||
(define hurd-vm-service-type
|
||
(service-type
|
||
(name 'hurd-vm)
|
||
(extensions (list (service-extension shepherd-root-service-type
|
||
hurd-vm-shepherd-service)
|
||
(service-extension account-service-type
|
||
(const %hurd-vm-accounts))
|
||
(service-extension activation-service-type
|
||
hurd-vm-activation)))
|
||
(default-value (hurd-vm-configuration))
|
||
(description
|
||
"Provide a virtual machine (VM) running GNU/Hurd, also known as a
|
||
@dfn{childhurd}.")))
|