1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
;; This is an operating system configuration file for a fairly minimal
;; "desktop" setup with i3 where the /home partition partition is
;; encrypted with LUKS.
;;
;; https://guix.gnu.org/manual/en/html_node/operating_002dsystem-Reference.html
(define-module (tw system cern)
#:use-module (gnu)
#:use-module (gnu bootloader grub)
#:use-module (gnu system locale)
#:use-module (gnu system nss)
#:use-module (guix gexp)
#:use-module (guix packages)
#:use-module (tw system))
(use-package-modules certs cups disk docker file-systems gnome kerberos linux
mtools pulseaudio search shells wm xorg)
(use-service-modules admin authentication avahi base cups dbus desktop docker
kerberos linux mcron networking pm shepherd ssh syncthing
vpn xorg)
(define efi-system-partition ; /dev/nvme0n1p1
(uuid "806A-2762" 'fat))
(define guixsd-root-partition ; /dev/nvme0n1p2
(uuid "04134b95-9cc5-4931-903a-c3446297a006" 'btrfs))
(define swap-partition ; /dev/nvme0n1p3
(uuid "53559d6c-bf62-4cf6-991a-6dce6dd1dc64"))
(define custom-xorg-config
(xorg-configuration
(keyboard-layout %british-keyboard)))
(define-public %cern-system
(operating-system
(host-name "twilkendesktop.cern.ch")
(timezone "Europe/Zurich")
(locale "en_GB.utf8")
(locale-definitions
(list (locale-definition (name "en_GB.utf8") (source "en_GB"))
(locale-definition (name "en_US.utf8") (source "en_US"))
(locale-definition (name "fr_FR.utf8") (source "fr_FR"))))
;; Allow resolution of '.local' host names with mDNS.
(name-service-switch %mdns-host-lookup-nss)
;; Choose UK English X11 keyboard layout.
(keyboard-layout %british-keyboard)
;; Use the UEFI variant of GRUB with the EFI System
;; Partition mounted on /boot/efi.
(bootloader
(bootloader-configuration
(bootloader grub-efi-bootloader)
(targets '("/boot/efi"))
;; Note: keyboard-layout is ignored by non-grub bootloaders.
(keyboard-layout keyboard-layout)
(menu-entries
(list
(menu-entry
(label "systemd-boot")
(device efi-system-partition)
(chain-loader "/EFI/systemd/systemd-bootx64.efi"))))))
(kernel linux-libre)
(swap-devices
(list (swap-space
(target swap-partition)
(discard? #t))))
(file-systems
(cons* (file-system
(device guixsd-root-partition)
(mount-point "/")
(flags '(no-atime))
(options (alist->file-system-options
'("ssd" ("compress" . "zstd"))))
(type "btrfs"))
(file-system
(device efi-system-partition)
(mount-point "/boot/efi")
(flags '(no-atime))
(type "vfat"))
%base-file-systems))
;; Members of the wheel group are allowed to use sudo.
(users (cons* (user-account
(name "twilken")
(comment "Timo Wilken")
(group "users")
(supplementary-groups
'("wheel" "audio" "video" "docker"))
(shell (file-append zsh "/bin/zsh")))
%base-user-accounts))
(sudoers-file
(plain-file "sudoers"
(string-append
;; We need to preserve $TERMINFO so that programs under sudo can
;; find kitty's terminfo files. This is possibly unsafe; sudo
;; explicitly deletes this variable by default.
"Defaults env_keep += \"TERMINFO\"\n"
(plain-file-content %sudoers-specification)
;; In addition to the default rules, allow admins to power off
;; the computer. They'll have to use the system binaries, not
;; those from their user profile, as /etc/sudoers requires
;; absolute paths to commands.
"%wheel ALL=(ALL) NOPASSWD: "
"/run/current-system/profile/sbin/halt, "
"/run/current-system/profile/sbin/reboot, "
"/run/current-system/profile/sbin/shutdown\n")))
;; This is where we specify system-wide packages.
(packages
(cons*
;; System stuff
cups docker mit-krb5
;; Desktop and drivers
;; FIXME: lightdm depends on python-2, but the build throws an
;; error that python2 is not supported.
;; TODO: Does lightdm have a service I need to enable?
;;lightdm lightdm-gtk-greeter
pulseaudio xf86-video-intel
;; Adds /sys/class/backlight entries for external monitors.
;; Not needed for laptop display.
;; ddcci-driver-linux
i3-gaps ; install i3 here so gdm can see its xsession file
i3lock ; we need a system service to make i3lock setuid root
;; We need to install gnome-keyring here so its PAM module is
;; enabled properly (by its service; see below).
;; nheko needs gnome-keyring to store secrets (kwallet doesn't do dbus).
gnome-keyring
;; It's probably easiest to install geoclue system-wide, so it
;; gets added to `%desktop-services' and redshift can access the
;; location.
geoclue
;; Base packages
%base-system-packages))
;; Use the "desktop" services, which include the X11
;; log-in service, networking with NetworkManager, and more.
;; See info '(guix)Services' for useful services.
(services
(cons*
(service cups-service-type
(cups-configuration
(web-interface? #t)
(default-shared? #f)
;; See info '(guix)Printing Services' for more extensions.
(extensions
(list cups-filters foomatic-filters))))
(service docker-service-type
(docker-configuration))
(service krb5-service-type
(krb5-configuration
(default-realm "CERN.CH")
(rdns? #f)
(realms (list (krb5-realm
(name "CERN.CH")
(default-domain "cern.ch")
(kdc "cerndc.cern.ch"))))))
;; At high CPU frequencies, the fan is very loud, starting around 3.5 GHz.
(simple-service 'cpufreq shepherd-root-service-type
(list (shepherd-service
(documentation "Limit CPU frequency")
(provision '(cpufreq))
(one-shot? #t)
(start #~(make-forkexec-constructor
(list #$(file-append cpupower "/bin/cpupower")
"frequency-set" "--max" "3.6GHz")))
(stop #~(make-forkexec-constructor
(list #$(file-append cpupower "/bin/cpupower")
"frequency-set" "--max" "4.8GHz")))
(actions
(list (shepherd-action
(name 'current)
(documentation "Show the current CPU frequencies.")
(procedure
#~(lambda _
(system* #$(file-append cpupower "/bin/cpupower")
"frequency-info")))))))))
(service thermald-service-type
(thermald-configuration
(adaptive? #t)))
(service earlyoom-service-type
(earlyoom-configuration)) ; TODO: configure at least `avoid-regexp'
;; Install i3lock as a setuid binary, so it can talk to PAM.
(service screen-locker-service-type
(screen-locker-configuration
(name "i3lock")
(program (file-append i3lock "/bin/i3lock"))))
;; gnome-keyring is not in `%desktop-services' by default,
;; but needs to be there to add itself to /etc/pam.d/.
;; If using a DM other than GDM, add it to `pam-services' in
;; `gnome-keyring-configuration' (see its docs).
(service gnome-keyring-service-type
(gnome-keyring-configuration))
(set-xorg-configuration custom-xorg-config)
(service unattended-upgrade-service-type
(unattended-upgrade-configuration
(schedule "0 21 * * *") ; every night at 22:00
(maximum-duration (* 40 60)) ; 40 minutes
(operating-system-expression
#~(begin
(set! %load-path (cons "/home/twilken/src/guix-decls" %load-path))
(@ (tw system cern) %cern-system)))
(services-to-restart
;; Anything that won't cause disruption when restarting.
'(mcron earlyoom thermald))))
(simple-service 'disk-maintenance mcron-service-type
(list #~(job "45 22 * * *" "guix gc -d 2m -F 100G") ; after unattended-upgrade
#~(job "0 23 * * *" ; after guix gc
(string-append #$(file-append util-linux "/sbin/fstrim")
" --fstab --verbose"))))
(simple-service 'arm-builders hosts-service-type
(list (host "188.184.68.217" "arm-builder-1")
(host "188.184.71.187" "arm-builder-2")
(host "188.184.69.33" "arm-builder-3")))
(service openssh-service-type
(openssh-configuration
(port-number 22022)
(x11-forwarding? #t)
(permit-root-login #f)
(password-authentication? #f)
(authorized-keys
`(("twilken" ,(local-file "files/timo-cern.pub"))))))
(service openntpd-service-type
(openntpd-configuration
;; Use CERN time servers.
(servers '("ip-time-0.cern.ch"
"ip-time-1.cern.ch"
"ip-time-2.cern.ch"))))
(modify-services %desktop-services
(gdm-service-type
config =>
(gdm-configuration
(inherit config)
(auto-login? #f)
(default-user "twilken")
(xorg-configuration custom-xorg-config)))
(geoclue-service-type
config =>
(geoclue-configuration
(inherit config)
(applications
(cons* (geoclue-application "redshift" #:system? #f)
%standard-geoclue-applications))))
(login-service-type
config =>
(login-configuration
(inherit config)
(motd (plain-file "no-motd" ""))
(allow-empty-passwords? #f)))
;; openntpd works better.
(delete ntp-service-type))))))
%cern-system
|
