unofficial mirror of bug-guix@gnu.org 
 help / color / mirror / code / Atom feed
blob 90b66a54d98d83885eafdf3385e1ff1311478643 17871 bytes (raw)
name: gnu/machine/digital-ocean.scm 	 # note: path name is non-authoritative(*)

  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
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
 
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Jakob L. Kreuze <zerodaysfordays@sdf.org>
;;; Copyright © 2020 Brice Waegeneire <brice@waegenei.re>
;;;
;;; 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 machine digital-ocean)
  #:use-module (gnu machine ssh)
  #:use-module (gnu machine)
  #:use-module (gnu services)
  #:use-module (gnu services networking)
  #:use-module (gnu system)
  #:use-module (gnu system pam)
  #:use-module (guix base32)
  #:use-module (guix derivations)
  #:use-module (guix i18n)
  #:use-module ((guix diagnostics) #:select (formatted-message))
  #:use-module (guix import json)
  #:use-module (guix monads)
  #:use-module (guix records)
  #:use-module (guix ssh)
  #:use-module (guix store)
  #:use-module (ice-9 iconv)
  #:use-module (json)
  #:use-module (rnrs bytevectors)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-2)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-35)
  #:use-module (ssh key)
  #:use-module (ssh sftp)
  #:use-module (ssh shell)
  #:use-module (web client)
  #:use-module (web request)
  #:use-module (web response)
  #:use-module (web uri)
  #:export (digital-ocean-configuration
            digital-ocean-configuration?

            digital-ocean-configuration-ssh-key
            digital-ocean-configuration-tags
            digital-ocean-configuration-region
            digital-ocean-configuration-size
            digital-ocean-configuration-enable-ipv6?

            digital-ocean-environment-type))

;;; Commentary:
;;;
;;; This module implements a high-level interface for provisioning "droplets"
;;; from the Digital Ocean virtual private server (VPS) service.
;;;
;;; Code:

(define %api-base "https://api.digitalocean.com")

(define %digital-ocean-token
  (make-parameter (getenv "GUIX_DIGITAL_OCEAN_TOKEN")))

(define* (post-endpoint endpoint body)
  "Encode BODY as JSON and send it to the Digital Ocean API endpoint
ENDPOINT. This procedure is quite a bit more specialized than 'http-post', as
it takes care to set headers such as 'Content-Type', 'Content-Length', and
'Authorization' appropriately."
  (let* ((uri (string->uri (string-append %api-base endpoint)))
         (body (string->bytevector (scm->json-string body) "UTF-8"))
         (headers `((User-Agent . "Guix Deploy")
                    (Accept . "application/json")
                    (Content-Type . "application/json")
                    (Authorization . ,(format #f "Bearer ~a"
                                              (%digital-ocean-token)))
                    (Content-Length . ,(number->string
                                        (bytevector-length body)))))
         (port (open-socket-for-uri uri))
         (request (build-request uri
                                 #:method 'POST
                                 #:version '(1 . 1)
                                 #:headers headers
                                 #:port port))
         (request (write-request request port)))
    (write-request-body request body)
    (force-output (request-port request))
    (let* ((response (read-response port))
           (body (read-response-body response)))
      (unless (= 2 (floor/ (response-code response) 100))
        (raise
         (condition (&message
                     (message (format
                               #f
                               (G_ "~a: HTTP post failed: ~a (~s)")
                               (uri->string uri)
                               (response-code response)
                               (response-reason-phrase response)))))))
      (close-port port)
      (bytevector->string body "UTF-8"))))

(define (fetch-endpoint endpoint)
  "Return the contents of the Digital Ocean API endpoint ENDPOINT as an
alist. This procedure is quite a bit more specialized than 'json-fetch', as it
takes care to set headers such as 'Accept' and 'Authorization' appropriately."
  (define headers
    `((user-agent . "Guix Deploy")
      (Accept . "application/json")
      (Authorization . ,(format #f "Bearer ~a" (%digital-ocean-token)))))
  (json-fetch (string-append %api-base endpoint) #:headers headers))

\f
;;;
;;; Parameters for droplet creation.
;;;

(define-record-type* <digital-ocean-configuration> digital-ocean-configuration
  make-digital-ocean-configuration
  digital-ocean-configuration?
  this-digital-ocean-configuration
  (ssh-key     digital-ocean-configuration-ssh-key)      ; string
  (tags        digital-ocean-configuration-tags)         ; list of strings
  (region      digital-ocean-configuration-region)       ; string
  (size        digital-ocean-configuration-size)         ; string
  (enable-ipv6? digital-ocean-configuration-enable-ipv6?)) ; boolean

(define (read-key-fingerprint file-name)
  "Read the private key at FILE-NAME and return the key's fingerprint as a hex
string."
  (let* ((privkey (private-key-from-file file-name))
         (pubkey (private-key->public-key privkey))
         (hash (get-public-key-hash pubkey 'md5)))
    (bytevector->hex-string hash)))

(define (machine-droplet machine)
  "Return an alist describing the droplet allocated to MACHINE."
  (let ((tags (digital-ocean-configuration-tags
               (machine-configuration machine))))
    (find (lambda (droplet)
            (equal? (assoc-ref droplet "tags") (list->vector tags)))
          (vector->list
           (assoc-ref (fetch-endpoint "/v2/droplets") "droplets")))))

(define (machine-public-ipv4-network machine)
  "Return the public IPv4 network interface of the droplet allocated to
MACHINE as an alist. The expected fields are 'ip_address', 'netmask', and
'gateway'."
  (and-let* ((droplet (machine-droplet machine))
             (networks (assoc-ref droplet "networks"))
             (network (find (lambda (network)
                              (string= "public" (assoc-ref network "type")))
                            (vector->list (assoc-ref networks "v4")))))
    network))

\f
;;;
;;; Remote evaluation.
;;;

(define (digital-ocean-remote-eval target exp)
  "Internal implementation of 'machine-remote-eval' for MACHINE instances with
an environment type of 'digital-ocean-environment-type'."
  (let* ((network (machine-public-ipv4-network target))
         (address (assoc-ref network "ip_address"))
         (ssh-key (digital-ocean-configuration-ssh-key
                   (machine-configuration target)))
         (delegate (machine
                    (inherit target)
                    (environment managed-host-environment-type)
                    (configuration
                     (machine-ssh-configuration
                      (host-name address)
                      (identity ssh-key)
                      (system "x86_64-linux"))))))
    (machine-remote-eval delegate exp)))

\f
;;;
;;; System deployment.
;;;

;; The following script was adapted from the guide available at
;; <https://wiki.pantherx.org/Installation-digital-ocean/>.
(define (guix-infect network)
  "Given NETWORK, an alist describing the Droplet's public IPv4 network
interface, return a Bash script that will install the Guix system."
  (format #f "#!/bin/bash

apt-get update
apt-get install xz-utils -y
wget https://ftp.gnu.org/gnu/guix/guix-binary-1.0.1.x86_64-linux.tar.xz
cd /tmp
tar --warning=no-timestamp -xf ~~/guix-binary-1.0.1.x86_64-linux.tar.xz
mv var/guix /var/ && mv gnu /
mkdir -p ~~root/.config/guix
ln -sf /var/guix/profiles/per-user/root/current-guix ~~root/.config/guix/current
export GUIX_PROFILE=\"`echo ~~root`/.config/guix/current\" ;
source $GUIX_PROFILE/etc/profile
groupadd --system guixbuild
for i in `seq -w 1 10`; do
   useradd -g guixbuild -G guixbuild         \
           -d /var/empty -s `which nologin`  \
           -c \"Guix build user $i\" --system  \
           guixbuilder$i;
done;
cp ~~root/.config/guix/current/lib/systemd/system/guix-daemon.service /etc/systemd/system/
systemctl start guix-daemon && systemctl enable guix-daemon
mkdir -p /usr/local/bin
cd /usr/local/bin
ln -s /var/guix/profiles/per-user/root/current-guix/bin/guix
mkdir -p /usr/local/share/info
cd /usr/local/share/info
for i in /var/guix/profiles/per-user/root/current-guix/share/info/*; do
    ln -s $i;
done
guix archive --authorize < ~~root/.config/guix/current/share/guix/ci.guix.gnu.org.pub
# guix pull
guix package -i glibc-utf8-locales
export GUIX_LOCPATH=\"$HOME/.guix-profile/lib/locale\"
guix package -i openssl
cat > /etc/bootstrap-config.scm << EOF
(use-modules (gnu))
(use-service-modules networking ssh)

(operating-system
  (host-name \"gnu-bootstrap\")
  (timezone \"Etc/UTC\")
  (bootloader (bootloader-configuration
               (bootloader grub-bootloader)
               (targets '(\"/dev/vda\"))
               (terminal-outputs '(console))))
  (file-systems (cons (file-system
                        (mount-point \"/\")
                        (device \"/dev/vda1\")
                        (type \"ext4\"))
                      %base-file-systems))
  (services
   (append (list (static-networking-service \"eth0\" \"~a\"
                    #:netmask \"~a\"
                    #:gateway \"~a\"
                    #:name-servers '(\"84.200.69.80\" \"84.200.70.40\"))
                 (simple-service 'guile-load-path-in-global-env
                  session-environment-service-type
                  \\`((\"GUILE_LOAD_PATH\"
                     . \"/run/current-system/profile/share/guile/site/2.2\")
                    (\"GUILE_LOAD_COMPILED_PATH\"
                     . ,(string-append \"/run/current-system/profile/lib/guile/2.2/site-ccache:\"
                                       \"/run/current-system/profile/share/guile/site/2.2\"))))
                 (service openssh-service-type
                          (openssh-configuration
                           (log-level 'debug)
                           (permit-root-login 'prohibit-password))))
           %base-services)))
EOF
# guix pull
guix system build /etc/bootstrap-config.scm
guix system reconfigure /etc/bootstrap-config.scm
mv /etc /old-etc
mkdir /etc
cp -r /old-etc/{passwd,group,shadow,gshadow,mtab,guix,bootstrap-config.scm} /etc/
guix system reconfigure /etc/bootstrap-config.scm"
          (assoc-ref network "ip_address")
          (assoc-ref network "netmask")
          (assoc-ref network "gateway")))

(define (machine-wait-until-available machine)
  "Block until the initial Debian image has been installed on the droplet
named DROPLET-NAME."
  (and-let* ((droplet (machine-droplet machine))
             (droplet-id (assoc-ref droplet "id"))
             (endpoint (format #f "/v2/droplets/~a/actions" droplet-id)))
    (let loop ()
      (let ((actions (assoc-ref (fetch-endpoint endpoint) "actions")))
        (unless (every (lambda (action)
                         (string= "completed" (assoc-ref action "status")))
                       (vector->list actions))
          (sleep 5)
          (loop))))))

(define (wait-for-ssh address ssh-key)
  "Block until the an SSH session can be made as 'root' with SSH-KEY at ADDRESS."
  (let loop ()
    (catch #t
      (lambda ()
        (open-ssh-session address #:user "root" #:identity ssh-key))
      (lambda args
        (sleep 5)
        (loop)))))

(define (add-static-networking target network)
  "Return an <operating-system> based on TARGET with a static networking
configuration for the public IPv4 network described by the alist NETWORK."
  (operating-system
    (inherit (machine-operating-system target))
    (services (cons* (static-networking-service "eth0"
                        (assoc-ref network "ip_address")
                        #:netmask (assoc-ref network "netmask")
                        #:gateway (assoc-ref network "gateway")
                        #:name-servers '("84.200.69.80" "84.200.70.40"))
                    (simple-service 'guile-load-path-in-global-env
                                    session-environment-service-type
                                    `(("GUILE_LOAD_PATH"
                                       . "/run/current-system/profile/share/guile/site/2.2")
                                      ("GUILE_LOAD_COMPILED_PATH"
                                       . ,(string-append "/run/current-system/profile/lib/guile/2.2/site-ccache:"
                                                         "/run/current-system/profile/share/guile/site/2.2"))))
                    (operating-system-user-services
                     (machine-operating-system target))))))

(define (deploy-digital-ocean target)
  "Internal implementation of 'deploy-machine' for 'machine' instances with an
environment type of 'digital-ocean-environment-type'."
  (maybe-raise-missing-api-key-error)
  (maybe-raise-unsupported-configuration-error target)
  (let* ((config (machine-configuration target))
         (name (machine-display-name target))
         (region (digital-ocean-configuration-region config))
         (size (digital-ocean-configuration-size config))
         (ssh-key (digital-ocean-configuration-ssh-key config))
         (fingerprint (read-key-fingerprint ssh-key))
         (enable-ipv6? (digital-ocean-configuration-enable-ipv6? config))
         (tags (digital-ocean-configuration-tags config))
         (request-body `(("name" . ,name)
                         ("region" . ,region)
                         ("size" . ,size)
                         ("image" . "debian-9-x64")
                         ("ssh_keys" . ,(vector fingerprint))
                         ("backups" . #f)
                         ("ipv6" . ,enable-ipv6?)
                         ("user_data" . #nil)
                         ("private_networking" . #nil)
                         ("volumes" . #nil)
                         ("tags" . ,(list->vector tags))))
         (response (post-endpoint "/v2/droplets" request-body)))
    (machine-wait-until-available target)
    (let* ((network (machine-public-ipv4-network target))
           (address (assoc-ref network "ip_address")))
      (wait-for-ssh address ssh-key)
      (let* ((ssh-session (open-ssh-session address #:user "root" #:identity ssh-key))
             (sftp-session (make-sftp-session ssh-session)))
        (call-with-remote-output-file sftp-session "/tmp/guix-infect.sh"
                                      (lambda (port)
                                        (display (guix-infect network) port)))
        (rexec ssh-session "/bin/bash /tmp/guix-infect.sh")
        ;; Session will close upon rebooting, which will raise 'guile-ssh-error.
        (catch 'guile-ssh-error
          (lambda () (rexec ssh-session "reboot"))
          (lambda args #t)))
      (wait-for-ssh address ssh-key)
      (let ((delegate (machine
                       (operating-system (add-static-networking target network))
                       (environment managed-host-environment-type)
                       (configuration
                        (machine-ssh-configuration
                         (host-name address)
                         (identity ssh-key)
                         (system "x86_64-linux"))))))
        (deploy-machine delegate)))))

\f
;;;
;;; Roll-back.
;;;

(define (roll-back-digital-ocean target)
  "Internal implementation of 'roll-back-machine' for MACHINE instances with an
environment type of 'digital-ocean-environment-type'."
  (let* ((network (machine-public-ipv4-network target))
         (address (assoc-ref network "ip_address"))
         (ssh-key (digital-ocean-configuration-ssh-key
                   (machine-configuration target)))
         (delegate (machine
                    (inherit target)
                    (environment managed-host-environment-type)
                    (configuration
                     (machine-ssh-configuration
                      (host-name address)
                      (identity ssh-key)
                      (system "x86_64-linux"))))))
    (roll-back-machine delegate)))

\f
;;;
;;; Environment type.
;;;

(define digital-ocean-environment-type
  (environment-type
   (machine-remote-eval digital-ocean-remote-eval)
   (deploy-machine      deploy-digital-ocean)
   (roll-back-machine   roll-back-digital-ocean)
   (name                'digital-ocean-environment-type)
   (description         "Provisioning of \"droplets\": virtual machines
 provided by the Digital Ocean virtual private server (VPS) service.")))


(define (maybe-raise-missing-api-key-error)
  (unless (%digital-ocean-token)
    (raise (condition
            (&message
             (message (G_ "No Digital Ocean access token was provided. This \
may be fixed by setting the environment variable GUIX_DIGITAL_OCAEN_TOKEN to \
one procured from https://cloud.digitalocean.com/account/api/tokens.")))))))

(define (maybe-raise-unsupported-configuration-error machine)
  "Raise an error if MACHINE's configuration is not an instance of
<digital-ocean-configuration>."
  (let ((config (machine-configuration machine))
        (environment (environment-type-name (machine-environment machine))))
    (unless (and config (digital-ocean-configuration? config))
      (raise (formatted-message (G_ "unsupported machine configuration '~a' \
for environment of type '~a'")
                                config
                                environment)))))

debug log:

solving 90b66a54d9 ...
found 90b66a54d9 in https://git.savannah.gnu.org/cgit/guix.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/guix.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).