diff options
| -rw-r--r-- | gnu/machine/ssh.scm | 146 |
1 files changed, 145 insertions, 1 deletions
diff --git a/gnu/machine/ssh.scm b/gnu/machine/ssh.scm index d1c90b6313..274d56db26 100644 --- a/gnu/machine/ssh.scm +++ b/gnu/machine/ssh.scm @@ -20,6 +20,9 @@ #:use-module (gnu machine) #:autoload (gnu packages gnupg) (guile-gcrypt) #:use-module (gnu system) + #:use-module (gnu system file-systems) + #:use-module (gnu system uuid) + #:use-module (guix diagnostics) #:use-module (guix gexp) #:use-module (guix i18n) #:use-module (guix modules) @@ -29,6 +32,7 @@ #:use-module (guix scripts system reconfigure) #:use-module (guix ssh) #:use-module (guix store) + #:use-module (guix utils) #:use-module (ice-9 match) #:use-module (srfi srfi-19) #:use-module (srfi srfi-26) @@ -100,6 +104,145 @@ an environment type of 'managed-host." ;;; +;;; Safety checks. +;;; + +(define (machine-check-file-system-availability machine) + "Raise a '&message' error condition if any of the file-systems specified in +MACHINE's 'system' declaration do not exist on the machine." + (define file-systems + (filter (lambda (fs) + (and (file-system-mount? fs) + (not (member (file-system-type fs) + %pseudo-file-system-types)) + (not (memq 'bind-mount (file-system-flags fs))))) + (operating-system-file-systems (machine-operating-system machine)))) + + (define (check-literal-file-system fs) + (define remote-exp + #~(catch 'system-error + (lambda () + (stat #$(file-system-device fs)) + #t) + (lambda args + (system-error-errno args)))) + + (mlet %store-monad ((errno (machine-remote-eval machine remote-exp))) + (when (number? errno) + (raise (condition + (&message + (message (format #f (G_ "device '~a' not found: ~a") + (file-system-device fs) + (strerror errno))))))) + (return #t))) + + (define (check-labeled-file-system fs) + (define remote-exp + (with-imported-modules '((gnu build file-systems)) + #~(begin + (use-modules (gnu build file-systems)) + (find-partition-by-label #$(file-system-label->string + (file-system-device fs)))))) + + (mlet %store-monad ((result (machine-remote-eval machine remote-exp))) + (unless result + (raise (condition + (&message + (message (format #f (G_ "no file system with label '~a'") + (file-system-label->string + (file-system-device fs)))))))) + (return #t))) + + (define (check-uuid-file-system fs) + (define remote-exp + (with-imported-modules (source-module-closure + '((gnu build file-systems) + (gnu system uuid))) + #~(begin + (use-modules (gnu build file-systems) + (gnu system uuid)) + + (define uuid + (string->uuid #$(uuid->string (file-system-device fs)))) + + (find-partition-by-uuid uuid)))) + + (mlet %store-monad ((result (machine-remote-eval machine remote-exp))) + (unless result + (raise (condition + (&message + (message (format #f (G_ "no file system with UUID '~a'") + (uuid->string (file-system-device fs)))))))) + (return #t))) + + (mbegin %store-monad + (mapm %store-monad check-literal-file-system + (filter (lambda (fs) + (string? (file-system-device fs))) + file-systems)) + (mapm %store-monad check-labeled-file-system + (filter (lambda (fs) + (file-system-label? (file-system-device fs))) + file-systems)) + (mapm %store-monad check-uuid-file-system + (filter (lambda (fs) + (uuid? (file-system-device fs))) + file-systems)))) + +(define (machine-check-initrd-modules machine) + "Raise a '&message' error condition if any of the modules needed by +'needed-for-boot' file systems in MACHINE are not available in the initrd." + (define file-systems + (filter file-system-needed-for-boot? + (operating-system-file-systems (machine-operating-system machine)))) + + (define (missing-modules fs) + (define remote-exp + (let ((device (file-system-device fs))) + (with-imported-modules (source-module-closure + '((gnu build file-systems) + (gnu build linux-modules) + (gnu system uuid))) + #~(begin + (use-modules (gnu build file-systems) + (gnu build linux-modules) + (gnu system uuid)) + + (define dev + #$(cond ((string? device) device) + ((uuid? device) #~(find-partition-by-uuid + (string->uuid + #$(uuid->string device)))) + ((file-system-label? device) + #~(find-partition-by-label + (file-system-label->string #$device))))) + + (missing-modules dev '#$(operating-system-initrd-modules + (machine-operating-system machine))))))) + (mlet %store-monad ((missing (machine-remote-eval machine remote-exp))) + (return (list fs missing)))) + + (mlet %store-monad ((device (mapm %store-monad missing-modules file-systems))) + (for-each (match-lambda + ((fs missing) + (unless (null? missing) + (raise (condition + (&message + (message (format #f (G_ "~a missing modules ~{ ~a~}~%") + (file-system-device fs) + missing)))))))) + device) + (return #t))) + +(define (check-deployment-sanity machine) + "Raise a '&message' error condition if it is clear that deploying MACHINE's +'system' declaration would fail." + (mbegin %store-monad + (machine-check-file-system-availability machine) + (machine-check-initrd-modules machine))) + + +;;; ;;; System deployment. ;;; @@ -165,7 +308,8 @@ of MACHINE's system profile, ordered from most recent to oldest." "Internal implementation of 'deploy-machine' for MACHINE instances with an environment type of 'managed-host." (maybe-raise-unsupported-configuration-error machine) - (mlet %store-monad ((boot-parameters (machine-boot-parameters machine))) + (mlet %store-monad ((_ (check-deployment-sanity machine)) + (boot-parameters (machine-boot-parameters machine))) (let* ((os (machine-operating-system machine)) (eval (cut machine-remote-eval machine <>)) (menu-entries (map boot-parameters->menu-entry boot-parameters)) |