services: Add the Guix Data Service.wip-guix-data-service

* gnu/services/guix.scm: New file.
* gnu/tests/guix.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add both new files.
* doc/guix.texi (Guix Services): New section documenting the Guix Data
Service.

1 files changed, 173 insertions, 0 deletions

diff --git a/gnu/tests/guix.scm b/gnu/tests/guix.scm
new file mode 100644
index 0000000000..6139e31cf0
--- /dev/null
+++ b/gnu/tests/guix.scm
@@ -0,0 +1,173 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 Christopher Baines <mail@cbaines.net>
+;;;
+;;; 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 tests guix)
+  #:use-module (gnu tests)
+  #:use-module (gnu system)
+  #:use-module (gnu system file-systems)
+  #:use-module (gnu system shadow)
+  #:use-module (gnu system vm)
+  #:use-module (gnu services)
+  #:use-module (gnu services guix)
+  #:use-module (gnu services databases)
+  #:use-module (gnu services shepherd)
+  #:use-module (gnu services networking)
+  #:use-module (gnu packages databases)
+  #:use-module (guix packages)
+  #:use-module (guix modules)
+  #:use-module (guix records)
+  #:use-module (guix gexp)
+  #:use-module (guix store)
+  #:use-module (guix utils)
+  #:use-module (ice-9 match)
+  #:export (%test-guix-data-service))
+
+
+;;;
+;;; Guix Data Service
+;;;
+
+(define guix-data-service-initial-database-setup-service
+  (let ((user "guix_data_service")
+        (name "guix_data_service"))
+    (define start-gexp
+      #~(lambda ()
+          (let ((pid (primitive-fork))
+                (postgres (getpwnam "postgres")))
+            (if (eq? pid 0)
+                (dynamic-wind
+                  (const #t)
+                  (lambda ()
+                    (setgid (passwd:gid postgres))
+                    (setuid (passwd:uid postgres))
+                    (primitive-exit
+                     (if (and
+                          (zero?
+                           (system* #$(file-append postgresql "/bin/createuser")
+                                    #$user))
+                          (zero?
+                           (system* #$(file-append postgresql "/bin/createdb")
+                                    "-O" #$user #$name)))
+                         0
+                         1)))
+                  (lambda ()
+                    (primitive-exit 1)))
+                (zero? (cdr (waitpid pid)))))))
+
+    (shepherd-service
+     (requirement '(postgres))
+     (provision '(guix-data-service-initial-database-setup))
+     (start start-gexp)
+     (stop #~(const #f))
+     (respawn? #f)
+     (one-shot? #t)
+     (documentation "Setup Guix Data Service database."))))
+
+(define %guix-data-service-os
+  (simple-operating-system
+   (service dhcp-client-service-type)
+   (service postgresql-service-type
+            (postgresql-configuration
+             (config-file
+              (postgresql-config-file
+               (hba-file
+                (plain-file "pg_hba.conf"
+                            "
+local	all	all			trust
+host	all	all	127.0.0.1/32 	trust
+host	all	all	::1/128 	trust"))))))
+   (service guix-data-service-type
+            (guix-data-service-configuration
+             (host "0.0.0.0")))
+   (simple-service 'guix-data-service-database-setup
+                   shepherd-root-service-type
+                   (list guix-data-service-initial-database-setup-service))))
+
+(define (run-guix-data-service-test)
+  (define os
+    (marionette-operating-system
+     %guix-data-service-os
+     #:imported-modules '((gnu services herd)
+                          (guix combinators))))
+
+  (define forwarded-port 8080)
+
+  (define vm
+    (virtual-machine
+     (operating-system os)
+     (memory-size 1024)
+     (port-forwardings `((,forwarded-port . 8765)))))
+
+  (define test
+    (with-imported-modules '((gnu build marionette))
+      #~(begin
+          (use-modules (srfi srfi-11) (srfi srfi-64)
+                       (gnu build marionette)
+                       (web uri)
+                       (web client)
+                       (web response))
+
+          (define marionette
+            (make-marionette (list #$vm)))
+
+          (mkdir #$output)
+          (chdir #$output)
+
+          (test-begin "guix-data-service")
+
+          (test-assert "service running"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (match (start-service 'guix-data-service)
+                  (#f #f)
+                  (('service response-parts ...)
+                   (match (assq-ref response-parts 'running)
+                     ((pid) (number? pid))))))
+             marionette))
+
+          (test-assert "process jobs service running"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (match (start-service 'guix-data-service-process-jobs)
+                  (#f #f)
+                  (('service response-parts ...)
+                   (match (assq-ref response-parts 'running)
+                     ((pid) (number? pid))))))
+             marionette))
+
+          (test-equal "http-get"
+            200
+            (let-values
+                (((response text)
+                  (http-get #$(simple-format
+                               #f "http://localhost:~A/healthcheck" forwarded-port)
+                            #:decode-body? #t)))
+              (response-code response)))
+
+          (test-end)
+          (exit (= (test-runner-fail-count (test-runner-current)) 0)))))
+
+  (gexp->derivation "guix-data-service-test" test))
+
+(define %test-guix-data-service
+  (system-test
+   (name "guix-data-service")
+   (description "Connect to a running Guix Data Service.")
+   (value (run-guix-data-service-test))))