Commit | Line | Data |
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fa9edf09 | 1 | ;;; GNU Guix --- Functional package management for GNU |
e8134442 | 2 | ;;; Copyright © 2019 Jakob L. Kreuze <zerodaysfordays@sdf.org> |
ea6e2299 | 3 | ;;; Copyright © 2020 Ludovic Courtès <ludo@gnu.org> |
fa9edf09 JK |
4 | ;;; |
5 | ;;; This file is part of GNU Guix. | |
6 | ;;; | |
7 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
8 | ;;; under the terms of the GNU General Public License as published by | |
9 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
10 | ;;; your option) any later version. | |
11 | ;;; | |
12 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
13 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ;;; GNU General Public License for more details. | |
16 | ;;; | |
17 | ;;; You should have received a copy of the GNU General Public License | |
18 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
19 | ||
20 | (define-module (gnu machine ssh) | |
9c70c460 | 21 | #:use-module (gnu bootloader) |
fa9edf09 JK |
22 | #:use-module (gnu machine) |
23 | #:autoload (gnu packages gnupg) (guile-gcrypt) | |
755f365b | 24 | #:autoload (gnu packages guile) (guile-zlib) |
fa9edf09 | 25 | #:use-module (gnu system) |
fd3119db JK |
26 | #:use-module (gnu system file-systems) |
27 | #:use-module (gnu system uuid) | |
a396dd01 | 28 | #:use-module ((gnu services) #:select (sexp->system-provenance)) |
fd3119db | 29 | #:use-module (guix diagnostics) |
fa9edf09 JK |
30 | #:use-module (guix gexp) |
31 | #:use-module (guix i18n) | |
32 | #:use-module (guix modules) | |
33 | #:use-module (guix monads) | |
3033d59a | 34 | #:use-module (guix pki) |
fa9edf09 JK |
35 | #:use-module (guix records) |
36 | #:use-module (guix remote) | |
5c793753 | 37 | #:use-module (guix scripts system reconfigure) |
fa9edf09 JK |
38 | #:use-module (guix ssh) |
39 | #:use-module (guix store) | |
fd3119db | 40 | #:use-module (guix utils) |
3033d59a | 41 | #:use-module (gcrypt pk-crypto) |
fdbba544 | 42 | #:use-module (ice-9 format) |
fa9edf09 | 43 | #:use-module (ice-9 match) |
3033d59a | 44 | #:use-module (ice-9 textual-ports) |
9c70c460 | 45 | #:use-module (srfi srfi-1) |
ea6e2299 | 46 | #:use-module (srfi srfi-9) |
fa9edf09 | 47 | #:use-module (srfi srfi-19) |
5c793753 | 48 | #:use-module (srfi srfi-26) |
2c8e04f1 | 49 | #:use-module (srfi srfi-34) |
fa9edf09 JK |
50 | #:use-module (srfi srfi-35) |
51 | #:export (managed-host-environment-type | |
52 | ||
53 | machine-ssh-configuration | |
54 | machine-ssh-configuration? | |
55 | machine-ssh-configuration | |
56 | ||
57 | machine-ssh-configuration-host-name | |
d84e9b75 | 58 | machine-ssh-configuration-build-locally? |
3033d59a | 59 | machine-ssh-configuration-authorize? |
a396dd01 | 60 | machine-ssh-configuration-allow-downgrades? |
fa9edf09 JK |
61 | machine-ssh-configuration-port |
62 | machine-ssh-configuration-user | |
ed15dfcf | 63 | machine-ssh-configuration-host-key |
fa9edf09 JK |
64 | machine-ssh-configuration-session)) |
65 | ||
66 | ;;; Commentary: | |
67 | ;;; | |
68 | ;;; This module implements remote evaluation and system deployment for | |
53f21b3f | 69 | ;;; machines that are accessible over SSH and have a known host-name. In the |
fa9edf09 JK |
70 | ;;; sense of the broader "machine" interface, we describe the environment for |
71 | ;;; such machines as 'managed-host. | |
72 | ;;; | |
73 | ;;; Code: | |
74 | ||
75 | \f | |
76 | ;;; | |
77 | ;;; Parameters for the SSH client. | |
78 | ;;; | |
79 | ||
80 | (define-record-type* <machine-ssh-configuration> machine-ssh-configuration | |
81 | make-machine-ssh-configuration | |
82 | machine-ssh-configuration? | |
3033d59a JK |
83 | (host-name machine-ssh-configuration-host-name) ; string |
84 | (system machine-ssh-configuration-system) ; string | |
85 | (build-locally? machine-ssh-configuration-build-locally? ; boolean | |
d84e9b75 | 86 | (default #t)) |
3033d59a JK |
87 | (authorize? machine-ssh-configuration-authorize? ; boolean |
88 | (default #t)) | |
a396dd01 LC |
89 | (allow-downgrades? machine-ssh-configuration-allow-downgrades? ; boolean |
90 | (default #f)) | |
3033d59a | 91 | (port machine-ssh-configuration-port ; integer |
d84e9b75 | 92 | (default 22)) |
3033d59a | 93 | (user machine-ssh-configuration-user ; string |
d84e9b75 | 94 | (default "root")) |
3033d59a | 95 | (identity machine-ssh-configuration-identity ; path to a private key |
d84e9b75 | 96 | (default #f)) |
3033d59a | 97 | (session machine-ssh-configuration-session ; session |
ed15dfcf LC |
98 | (default #f)) |
99 | (host-key machine-ssh-configuration-host-key ; #f | string | |
d84e9b75 | 100 | (default #f))) |
fa9edf09 JK |
101 | |
102 | (define (machine-ssh-session machine) | |
103 | "Return the SSH session that was given in MACHINE's configuration, or create | |
104 | one from the configuration's parameters if one was not provided." | |
105 | (maybe-raise-unsupported-configuration-error machine) | |
106 | (let ((config (machine-configuration machine))) | |
107 | (or (machine-ssh-configuration-session config) | |
108 | (let ((host-name (machine-ssh-configuration-host-name config)) | |
109 | (user (machine-ssh-configuration-user config)) | |
110 | (port (machine-ssh-configuration-port config)) | |
ed15dfcf LC |
111 | (identity (machine-ssh-configuration-identity config)) |
112 | (host-key (machine-ssh-configuration-host-key config))) | |
2617d956 LC |
113 | (unless host-key |
114 | (warning (G_ "<machine-ssh-configuration> without a 'host-key' \ | |
115 | is deprecated~%"))) | |
fa9edf09 JK |
116 | (open-ssh-session host-name |
117 | #:user user | |
118 | #:port port | |
ed15dfcf LC |
119 | #:identity identity |
120 | #:host-key host-key))))) | |
fa9edf09 JK |
121 | |
122 | \f | |
123 | ;;; | |
124 | ;;; Remote evaluation. | |
125 | ;;; | |
126 | ||
5ea7537b JK |
127 | (define (machine-become-command machine) |
128 | "Return as a list of strings the program and arguments necessary to run a | |
129 | shell command with escalated privileges for MACHINE's configuration." | |
130 | (if (string= "root" (machine-ssh-configuration-user | |
131 | (machine-configuration machine))) | |
132 | '() | |
133 | '("/run/setuid-programs/sudo" "-n" "--"))) | |
134 | ||
fa9edf09 JK |
135 | (define (managed-host-remote-eval machine exp) |
136 | "Internal implementation of 'machine-remote-eval' for MACHINE instances with | |
137 | an environment type of 'managed-host." | |
138 | (maybe-raise-unsupported-configuration-error machine) | |
2c8e04f1 JK |
139 | (let ((config (machine-configuration machine))) |
140 | (remote-eval exp (machine-ssh-session machine) | |
141 | #:build-locally? | |
142 | (machine-ssh-configuration-build-locally? config) | |
143 | #:system | |
4cc5e520 JK |
144 | (machine-ssh-configuration-system config) |
145 | #:become-command | |
146 | (machine-become-command machine)))) | |
fa9edf09 JK |
147 | |
148 | \f | |
fd3119db JK |
149 | ;;; |
150 | ;;; Safety checks. | |
151 | ;;; | |
152 | ||
ea6e2299 LC |
153 | ;; Assertion to be executed remotely. This abstraction exists to allow us to |
154 | ;; gather a list of expressions to be evaluated and eventually evaluate them | |
155 | ;; all at once instead of one by one. (This is pretty much a monad.) | |
156 | (define-record-type <remote-assertion> | |
157 | (remote-assertion exp proc) | |
158 | remote-assertion? | |
159 | (exp remote-assertion-expression) | |
160 | (proc remote-assertion-procedure)) | |
161 | ||
162 | (define-syntax-rule (remote-let ((var exp)) body ...) | |
163 | "Return a <remote-assertion> that binds VAR to the result of evaluating EXP, | |
164 | a gexp, remotely, and evaluate BODY in that context." | |
165 | (remote-assertion exp (lambda (var) body ...))) | |
166 | ||
fd3119db | 167 | (define (machine-check-file-system-availability machine) |
ea6e2299 LC |
168 | "Return a list of <remote-assertion> that raise a '&message' error condition |
169 | if any of the file-systems specified in MACHINE's 'system' declaration do not | |
170 | exist on the machine." | |
fd3119db JK |
171 | (define file-systems |
172 | (filter (lambda (fs) | |
173 | (and (file-system-mount? fs) | |
174 | (not (member (file-system-type fs) | |
175 | %pseudo-file-system-types)) | |
176 | (not (memq 'bind-mount (file-system-flags fs))))) | |
177 | (operating-system-file-systems (machine-operating-system machine)))) | |
178 | ||
179 | (define (check-literal-file-system fs) | |
ea6e2299 LC |
180 | (remote-let ((errno #~(catch 'system-error |
181 | (lambda () | |
182 | (stat #$(file-system-device fs)) | |
183 | #t) | |
184 | (lambda args | |
185 | (system-error-errno args))))) | |
fd3119db | 186 | (when (number? errno) |
d51bfe24 | 187 | (raise (formatted-message (G_ "device '~a' not found: ~a") |
fd3119db | 188 | (file-system-device fs) |
d51bfe24 | 189 | (strerror errno)))))) |
fd3119db JK |
190 | |
191 | (define (check-labeled-file-system fs) | |
192 | (define remote-exp | |
02460db0 SB |
193 | (with-imported-modules (source-module-closure |
194 | '((gnu build file-systems))) | |
fd3119db JK |
195 | #~(begin |
196 | (use-modules (gnu build file-systems)) | |
197 | (find-partition-by-label #$(file-system-label->string | |
198 | (file-system-device fs)))))) | |
199 | ||
ea6e2299 | 200 | (remote-let ((result remote-exp)) |
fd3119db | 201 | (unless result |
d51bfe24 | 202 | (raise (formatted-message (G_ "no file system with label '~a'") |
fd3119db | 203 | (file-system-label->string |
d51bfe24 | 204 | (file-system-device fs))))))) |
fd3119db JK |
205 | |
206 | (define (check-uuid-file-system fs) | |
207 | (define remote-exp | |
208 | (with-imported-modules (source-module-closure | |
209 | '((gnu build file-systems) | |
210 | (gnu system uuid))) | |
211 | #~(begin | |
212 | (use-modules (gnu build file-systems) | |
213 | (gnu system uuid)) | |
214 | ||
0dd04b99 MC |
215 | (let ((uuid (uuid #$(uuid->string (file-system-device fs)) |
216 | '#$(uuid-type (file-system-device fs))))) | |
217 | (find-partition-by-uuid uuid))))) | |
fd3119db | 218 | |
ea6e2299 | 219 | (remote-let ((result remote-exp)) |
fd3119db | 220 | (unless result |
d51bfe24 LC |
221 | (raise (formatted-message (G_ "no file system with UUID '~a'") |
222 | (uuid->string (file-system-device fs))))))) | |
ea6e2299 LC |
223 | |
224 | (append (map check-literal-file-system | |
225 | (filter (lambda (fs) | |
226 | (string? (file-system-device fs))) | |
227 | file-systems)) | |
228 | (map check-labeled-file-system | |
229 | (filter (lambda (fs) | |
230 | (file-system-label? (file-system-device fs))) | |
231 | file-systems)) | |
232 | (map check-uuid-file-system | |
233 | (filter (lambda (fs) | |
234 | (uuid? (file-system-device fs))) | |
235 | file-systems)))) | |
fd3119db JK |
236 | |
237 | (define (machine-check-initrd-modules machine) | |
ea6e2299 LC |
238 | "Return a list of <remote-assertion> that raise a '&message' error condition |
239 | if any of the modules needed by 'needed-for-boot' file systems in MACHINE are | |
240 | not available in the initrd." | |
fd3119db JK |
241 | (define file-systems |
242 | (filter file-system-needed-for-boot? | |
243 | (operating-system-file-systems (machine-operating-system machine)))) | |
244 | ||
245 | (define (missing-modules fs) | |
246 | (define remote-exp | |
247 | (let ((device (file-system-device fs))) | |
248 | (with-imported-modules (source-module-closure | |
249 | '((gnu build file-systems) | |
250 | (gnu build linux-modules) | |
251 | (gnu system uuid))) | |
755f365b MO |
252 | (with-extensions (list guile-zlib) |
253 | #~(begin | |
254 | (use-modules (gnu build file-systems) | |
255 | (gnu build linux-modules) | |
256 | (gnu system uuid)) | |
fd3119db | 257 | |
755f365b MO |
258 | (define dev |
259 | #$(cond ((string? device) device) | |
260 | ((uuid? device) #~(find-partition-by-uuid | |
261 | (string->uuid | |
262 | #$(uuid->string device)))) | |
263 | ((file-system-label? device) | |
264 | #~(find-partition-by-label | |
265 | #$(file-system-label->string device))))) | |
fd3119db | 266 | |
755f365b MO |
267 | (missing-modules dev |
268 | '#$(operating-system-initrd-modules | |
269 | (machine-operating-system machine)))))))) | |
ea6e2299 LC |
270 | |
271 | (remote-let ((missing remote-exp)) | |
272 | (unless (null? missing) | |
273 | (raise (condition | |
274 | (&message | |
8bc74505 | 275 | (message (format #f (G_ "missing modules for ~a:~{ ~a~}~%") |
ea6e2299 LC |
276 | (file-system-device fs) |
277 | missing)))))))) | |
278 | ||
279 | (map missing-modules file-systems)) | |
fd3119db | 280 | |
a396dd01 LC |
281 | (define* (machine-check-forward-update machine) |
282 | "Check whether we are making a forward update for MACHINE. Depending on its | |
283 | 'allow-upgrades?' field, raise an error or display a warning if we are | |
284 | potentially downgrading it." | |
285 | (define config | |
286 | (machine-configuration machine)) | |
287 | ||
288 | (define validate-reconfigure | |
289 | (if (machine-ssh-configuration-allow-downgrades? config) | |
290 | warn-about-backward-reconfigure | |
291 | ensure-forward-reconfigure)) | |
292 | ||
293 | (remote-let ((provenance #~(call-with-input-file | |
294 | "/run/current-system/provenance" | |
295 | read))) | |
296 | (define channels | |
297 | (sexp->system-provenance provenance)) | |
298 | ||
299 | (check-forward-update validate-reconfigure | |
300 | #:current-channels channels))) | |
301 | ||
2c8e04f1 JK |
302 | (define (machine-check-building-for-appropriate-system machine) |
303 | "Raise a '&message' error condition if MACHINE is configured to be built | |
304 | locally and the 'system' field does not match the '%current-system' reported | |
305 | by MACHINE." | |
306 | (let ((config (machine-configuration machine)) | |
307 | (system (remote-system (machine-ssh-session machine)))) | |
308 | (when (and (machine-ssh-configuration-build-locally? config) | |
309 | (not (string= system (machine-ssh-configuration-system config)))) | |
d51bfe24 | 310 | (raise (formatted-message (G_ "incorrect target system\ |
ea6e2299 | 311 | ('~a' was given, while the system reports that it is '~a')~%") |
2c8e04f1 | 312 | (machine-ssh-configuration-system config) |
d51bfe24 | 313 | system))))) |
2c8e04f1 | 314 | |
fd3119db JK |
315 | (define (check-deployment-sanity machine) |
316 | "Raise a '&message' error condition if it is clear that deploying MACHINE's | |
317 | 'system' declaration would fail." | |
ea6e2299 LC |
318 | (define assertions |
319 | (append (machine-check-file-system-availability machine) | |
a396dd01 LC |
320 | (machine-check-initrd-modules machine) |
321 | (list (machine-check-forward-update machine)))) | |
ea6e2299 LC |
322 | |
323 | (define aggregate-exp | |
324 | ;; Gather all the expressions so that a single round-trip is enough to | |
325 | ;; evaluate all the ASSERTIONS remotely. | |
326 | #~(map (lambda (file) | |
327 | (false-if-exception (primitive-load file))) | |
328 | '#$(map (lambda (assertion) | |
329 | (scheme-file "remote-assertion.scm" | |
330 | (remote-assertion-expression assertion))) | |
331 | assertions))) | |
332 | ||
333 | ;; First check MACHINE's system type--an incorrect value for 'system' would | |
334 | ;; cause subsequent invocations of 'remote-eval' to fail. | |
335 | (machine-check-building-for-appropriate-system machine) | |
336 | ||
337 | (mlet %store-monad ((values (machine-remote-eval machine aggregate-exp))) | |
338 | (for-each (lambda (proc value) | |
339 | (proc value)) | |
340 | (map remote-assertion-procedure assertions) | |
341 | values) | |
342 | (return #t))) | |
fd3119db JK |
343 | |
344 | \f | |
fa9edf09 JK |
345 | ;;; |
346 | ;;; System deployment. | |
347 | ;;; | |
348 | ||
fa9edf09 JK |
349 | (define (machine-boot-parameters machine) |
350 | "Monadic procedure returning a list of 'boot-parameters' for the generations | |
351 | of MACHINE's system profile, ordered from most recent to oldest." | |
352 | (define bootable-kernel-arguments | |
353 | (@@ (gnu system) bootable-kernel-arguments)) | |
354 | ||
355 | (define remote-exp | |
356 | (with-extensions (list guile-gcrypt) | |
357 | (with-imported-modules (source-module-closure '((guix config) | |
358 | (guix profiles))) | |
359 | #~(begin | |
360 | (use-modules (guix config) | |
361 | (guix profiles) | |
362 | (ice-9 textual-ports)) | |
363 | ||
364 | (define %system-profile | |
365 | (string-append %state-directory "/profiles/system")) | |
366 | ||
367 | (define (read-file path) | |
368 | (call-with-input-file path | |
369 | (lambda (port) | |
370 | (get-string-all port)))) | |
371 | ||
372 | (map (lambda (generation) | |
373 | (let* ((system-path (generation-file-name %system-profile | |
374 | generation)) | |
375 | (boot-parameters-path (string-append system-path | |
376 | "/parameters")) | |
377 | (time (stat:mtime (lstat system-path)))) | |
378 | (list generation | |
379 | system-path | |
380 | time | |
381 | (read-file boot-parameters-path)))) | |
382 | (reverse (generation-numbers %system-profile))))))) | |
383 | ||
384 | (mlet* %store-monad ((generations (machine-remote-eval machine remote-exp))) | |
385 | (return | |
386 | (map (lambda (generation) | |
387 | (match generation | |
388 | ((generation system-path time serialized-params) | |
389 | (let* ((params (call-with-input-string serialized-params | |
390 | read-boot-parameters)) | |
391 | (root (boot-parameters-root-device params)) | |
392 | (label (boot-parameters-label params))) | |
393 | (boot-parameters | |
394 | (inherit params) | |
395 | (label | |
396 | (string-append label " (#" | |
397 | (number->string generation) ", " | |
398 | (let ((time (make-time time-utc 0 time))) | |
399 | (date->string (time-utc->date time) | |
400 | "~Y-~m-~d ~H:~M")) | |
401 | ")")) | |
402 | (kernel-arguments | |
403 | (append (bootable-kernel-arguments system-path root) | |
404 | (boot-parameters-kernel-arguments params)))))))) | |
405 | generations)))) | |
406 | ||
9c70c460 JK |
407 | (define-syntax-rule (with-roll-back should-roll-back? mbody ...) |
408 | "Catch exceptions that arise when binding MBODY, a monadic expression in | |
409 | %STORE-MONAD, and collect their arguments in a &deploy-error condition, with | |
410 | the 'should-roll-back' field set to SHOULD-ROLL-BACK?" | |
411 | (catch #t | |
412 | (lambda () | |
413 | mbody ...) | |
414 | (lambda args | |
415 | (raise (condition (&deploy-error | |
416 | (should-roll-back should-roll-back?) | |
417 | (captured-args args))))))) | |
418 | ||
fa9edf09 JK |
419 | (define (deploy-managed-host machine) |
420 | "Internal implementation of 'deploy-machine' for MACHINE instances with an | |
421 | environment type of 'managed-host." | |
422 | (maybe-raise-unsupported-configuration-error machine) | |
3033d59a JK |
423 | (when (machine-ssh-configuration-authorize? |
424 | (machine-configuration machine)) | |
425 | (unless (file-exists? %public-key-file) | |
d51bfe24 | 426 | (raise (formatted-message (G_ "no signing key '~a'. \ |
3033d59a | 427 | have you run 'guix archive --generate-key?'") |
d51bfe24 | 428 | %public-key-file))) |
3033d59a JK |
429 | (remote-authorize-signing-key (call-with-input-file %public-key-file |
430 | (lambda (port) | |
431 | (string->canonical-sexp | |
432 | (get-string-all port)))) | |
4cc5e520 JK |
433 | (machine-ssh-session machine) |
434 | (machine-become-command machine))) | |
fd3119db JK |
435 | (mlet %store-monad ((_ (check-deployment-sanity machine)) |
436 | (boot-parameters (machine-boot-parameters machine))) | |
d97ce204 | 437 | (let* ((os (machine-operating-system machine)) |
5c793753 JK |
438 | (eval (cut machine-remote-eval machine <>)) |
439 | (menu-entries (map boot-parameters->menu-entry boot-parameters)) | |
440 | (bootloader-configuration (operating-system-bootloader os)) | |
441 | (bootcfg (operating-system-bootcfg os menu-entries))) | |
442 | (mbegin %store-monad | |
9c70c460 JK |
443 | (with-roll-back #f |
444 | (switch-to-system eval os)) | |
445 | (with-roll-back #t | |
446 | (mbegin %store-monad | |
447 | (upgrade-shepherd-services eval os) | |
448 | (install-bootloader eval bootloader-configuration bootcfg))))))) | |
449 | ||
450 | \f | |
451 | ;;; | |
452 | ;;; Roll-back. | |
453 | ;;; | |
454 | ||
455 | (define (roll-back-managed-host machine) | |
456 | "Internal implementation of 'roll-back-machine' for MACHINE instances with | |
457 | an environment type of 'managed-host." | |
458 | (define remote-exp | |
459 | (with-extensions (list guile-gcrypt) | |
460 | (with-imported-modules (source-module-closure '((guix config) | |
461 | (guix profiles))) | |
462 | #~(begin | |
463 | (use-modules (guix config) | |
464 | (guix profiles)) | |
465 | ||
466 | (define %system-profile | |
467 | (string-append %state-directory "/profiles/system")) | |
468 | ||
469 | (define target-generation | |
470 | (relative-generation %system-profile -1)) | |
471 | ||
472 | (if target-generation | |
473 | (switch-to-generation %system-profile target-generation) | |
474 | 'error))))) | |
475 | ||
476 | (define roll-back-failure | |
477 | (condition (&message (message (G_ "could not roll-back machine"))))) | |
478 | ||
479 | (mlet* %store-monad ((boot-parameters (machine-boot-parameters machine)) | |
480 | (_ -> (if (< (length boot-parameters) 2) | |
481 | (raise roll-back-failure))) | |
482 | (entries -> (map boot-parameters->menu-entry | |
483 | (list (second boot-parameters)))) | |
484 | (old-entries -> (map boot-parameters->menu-entry | |
485 | (drop boot-parameters 2))) | |
486 | (bootloader -> (operating-system-bootloader | |
487 | (machine-operating-system machine))) | |
488 | (bootcfg (lower-object | |
489 | ((bootloader-configuration-file-generator | |
490 | (bootloader-configuration-bootloader | |
491 | bootloader)) | |
492 | bootloader entries | |
493 | #:old-entries old-entries))) | |
494 | (remote-result (machine-remote-eval machine remote-exp))) | |
495 | (when (eqv? 'error remote-result) | |
496 | (raise roll-back-failure)))) | |
fa9edf09 JK |
497 | |
498 | \f | |
499 | ;;; | |
500 | ;;; Environment type. | |
501 | ;;; | |
502 | ||
503 | (define managed-host-environment-type | |
504 | (environment-type | |
505 | (machine-remote-eval managed-host-remote-eval) | |
506 | (deploy-machine deploy-managed-host) | |
9c70c460 | 507 | (roll-back-machine roll-back-managed-host) |
fa9edf09 | 508 | (name 'managed-host-environment-type) |
53f21b3f | 509 | (description "Provisioning for machines that are accessible over SSH |
fa9edf09 JK |
510 | and have a known host-name. This entails little more than maintaining an SSH |
511 | connection to the host."))) | |
512 | ||
513 | (define (maybe-raise-unsupported-configuration-error machine) | |
514 | "Raise an error if MACHINE's configuration is not an instance of | |
515 | <machine-ssh-configuration>." | |
516 | (let ((config (machine-configuration machine)) | |
517 | (environment (environment-type-name (machine-environment machine)))) | |
518 | (unless (and config (machine-ssh-configuration? config)) | |
d51bfe24 | 519 | (raise (formatted-message (G_ "unsupported machine configuration '~a' |
fa9edf09 JK |
520 | for environment of type '~a'") |
521 | config | |
d51bfe24 | 522 | environment))))) |
a396dd01 LC |
523 | |
524 | ;; Local Variables: | |
525 | ;; eval: (put 'remote-let 'scheme-indent-function 1) | |
526 | ;; End: |