services: nfs: Add nfs-service-type.

* gnu/services/nfs.scm (<nfs-configuration>): New record.
(nfs-configuration, nfs-configuration?, nfs-configuration-nfs-utils,
nfs-configuration-nfs-version, nfs-configuration-exports,
nfs-configuration-rpcmountd-port, nfs-configuration-rpcstatd-port,
nfs-configuration-rpcbind, nfs-configuration-idmap-domain,
nfs-configuration-nfsd-port, nfs-configuration-nfsd-threads,
nfs-configuration-pipefs-directory, nfs-configuration-debug,
nfs-shepherd-services): New procedures.
(nfs-service-type): New variable.
* doc/guix.texi (Network File System): Document it.
* gnu/tests/nfs.scm (%test-nfs-server): New variable.
(%base-os): Use default value of rpcbind-service-type.

1 files changed, 154 insertions, 3 deletions

diff --git a/gnu/tests/nfs.scm b/gnu/tests/nfs.scm
index 7ef9f1f7bf..014d049ab5 100644
--- a/gnu/tests/nfs.scm
+++ b/gnu/tests/nfs.scm
@@ -4,6 +4,7 @@
 ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
 ;;; Copyright © 2017 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2018 Clément Lassieur <clement@lassieur.org>
+;;; Copyright © 2019, 2020 Ricardo Wurmus <rekado@elephly.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -33,10 +34,12 @@
   #:use-module (gnu services nfs)
   #:use-module (gnu services networking)
   #:use-module (gnu packages onc-rpc)
+  #:use-module (gnu packages nfs)
   #:use-module (guix gexp)
   #:use-module (guix store)
   #:use-module (guix monads)
-  #:export (%test-nfs))
+  #:export (%test-nfs
+            %test-nfs-server))
 
 (define %base-os
   (operating-system
@@ -53,8 +56,7 @@
                rpcbind
                %base-packages))
     (services (cons*
-               (service rpcbind-service-type
-                        (rpcbind-configuration))
+               (service rpcbind-service-type)
                (service dhcp-client-service-type)
                %base-services))))
 
@@ -133,3 +135,152 @@
    (name "nfs")
    (description "Test some things related to NFS.")
    (value (run-nfs-test name "/var/run/rpcbind.sock"))))
+
+
+(define %nfs-os
+  (let ((os (simple-operating-system
+             (simple-service 'create-target-directory activation-service-type
+                             #~(begin
+                                 (mkdir "/remote")
+                                 (chmod "/remote" #o777)
+                                 #t))
+             (service dhcp-client-service-type)
+             (service nfs-service-type
+                      (nfs-configuration
+                       (debug '(nfs nfsd mountd))
+                       (exports '(("/export"
+                                   ;; crossmnt = This is the pseudo root.
+                                   ;; fsid=0 = root file system of the export
+                                   "*(ro,insecure,no_subtree_check,crossmnt,fsid=0)"))))))))
+    (operating-system
+      (inherit os)
+      (host-name "nfs-server")
+      ;; We need to use a tmpfs here, because the test system's root file
+      ;; system cannot be re-exported via NFS.
+      (file-systems (cons
+                     (file-system
+                       (device "none")
+                       (mount-point "/export")
+                       (type "tmpfs")
+                       (create-mount-point? #t))
+                     %base-file-systems))
+      (services
+       ;; Enable debugging output.
+       (modify-services (operating-system-user-services os)
+         (syslog-service-type config
+                              =>
+                              (syslog-configuration
+                               (inherit config)
+                               (config-file
+                                (plain-file
+                                 "syslog.conf"
+                                 "*.* /dev/console\n")))))))))
+
+(define (run-nfs-server-test)
+  "Run a test of an OS running a service of NFS-SERVICE-TYPE."
+  (define os
+    (marionette-operating-system
+     %nfs-os
+     #:requirements '(nscd)
+     #:imported-modules '((gnu services herd)
+                          (guix combinators))))
+  (define test
+    (with-imported-modules '((gnu build marionette))
+      #~(begin
+          (use-modules (gnu build marionette)
+                       (srfi srfi-64))
+
+          (define marionette
+            (make-marionette (list #$(virtual-machine os))))
+          (define (wait-for-file file)
+            ;; Wait until FILE  exists in the guest
+            (marionette-eval
+             `(let loop ((i 10))
+                (cond ((file-exists? ,file)
+                       #t)
+                      ((> i 0)
+                       (sleep 1)
+                       (loop (- i 1)))
+                      (else
+                       (error "File didn't show up: " ,file))))
+             marionette))
+
+          (mkdir #$output)
+          (chdir #$output)
+
+          (test-begin "nfs-daemon")
+          (marionette-eval
+           '(begin
+              (current-output-port
+               (open-file "/dev/console" "w0"))
+              (chmod "/export" #o777)
+              (with-output-to-file "/export/hello"
+                (lambda () (display "hello world")))
+              (chmod "/export/hello" #o777))
+           marionette)
+
+          (test-assert "nscd PID file is created"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'nscd))
+             marionette))
+
+          (test-assert "nscd is listening on its socket"
+            (marionette-eval
+             ;; XXX: Work around a race condition in nscd: nscd creates its
+             ;; PID file before it is listening on its socket.
+             '(let ((sock (socket PF_UNIX SOCK_STREAM 0)))
+                (let try ()
+                  (catch 'system-error
+                    (lambda ()
+                      (connect sock AF_UNIX "/var/run/nscd/socket")
+                      (close-port sock)
+                      (format #t "nscd is ready~%")
+                      #t)
+                    (lambda args
+                      (format #t "waiting for nscd...~%")
+                      (usleep 500000)
+                      (try)))))
+             marionette))
+
+          (test-assert "network is up"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'networking))
+             marionette))
+
+          ;; Wait for the NFS services to be up and running.
+          (test-assert "nfs services are running"
+            (and (marionette-eval
+                  '(begin
+                     (use-modules (gnu services herd))
+                     (start-service 'nfs))
+                  marionette)
+                 (wait-for-file "/var/run/rpc.statd.pid")))
+
+          (test-assert "nfs share is advertised"
+            (marionette-eval
+             '(zero? (system* (string-append #$nfs-utils "/sbin/showmount")
+                              "-e" "nfs-server"))
+             marionette))
+
+          (test-assert "nfs share mounted"
+            (marionette-eval
+             '(begin
+                (and (zero? (system* (string-append #$nfs-utils "/sbin/mount.nfs4")
+                                     "nfs-server:/" "/remote" "-v"))
+                     (file-exists? "/remote/hello")))
+             marionette))
+          (test-end)
+          (exit (= (test-runner-fail-count (test-runner-current)) 0)))))
+
+  (gexp->derivation "nfs-server-test" test))
+
+(define %test-nfs-server
+  (system-test
+   (name "nfs-server")
+   (description "Test that an NFS server can be started and exported
+directories can be mounted.")
+   (value (run-nfs-server-test))))