services: Add memcached.

* gnu/services/databases.scm (memcached-service-type, %memcached-accounts):
  New variables.
  (<memcached-configuration>): New record type.
  (memcached-service-type): New procedures.
* gnu/tests/databases.scm: New file.
* doc/guix.texi (Database Services): Document the new memcached service.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add entry for tests/databases.scm.

1 files changed, 121 insertions, 0 deletions

diff --git a/gnu/tests/databases.scm b/gnu/tests/databases.scm
new file mode 100644
index 0000000000..310210c368
--- /dev/null
+++ b/gnu/tests/databases.scm
@@ -0,0 +1,121 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 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 databases)
+  #: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 databases)
+  #:use-module (gnu services networking)
+  #:use-module (guix gexp)
+  #:use-module (guix store)
+  #:export (%test-memcached))
+
+(define %memcached-os
+  (simple-operating-system
+   (dhcp-client-service)
+   (service memcached-service-type)))
+
+(define* (run-memcached-test #:optional (port 11211))
+  "Run tests in %MEMCACHED-OS, forwarding PORT."
+  (define os
+    (marionette-operating-system
+     %memcached-os
+     #:imported-modules '((gnu services herd)
+                          (guix combinators))))
+
+  (define vm
+    (virtual-machine
+     (operating-system os)
+     (port-forwardings `((11211 . ,port)))))
+
+  (define test
+    (with-imported-modules '((gnu build marionette))
+      #~(begin
+          (use-modules (srfi srfi-11) (srfi srfi-64)
+                       (gnu build marionette)
+                       (ice-9 rdelim))
+
+          (define marionette
+            (make-marionette (list #$vm)))
+
+          (mkdir #$output)
+          (chdir #$output)
+
+          (test-begin "memcached")
+
+          ;; Wait for memcached to be up and running.
+          (test-eq "service running"
+            'running!
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'memcached)
+                'running!)
+             marionette))
+
+          (let* ((ai (car (getaddrinfo "localhost"
+                                       #$(number->string port))))
+                 (s  (socket (addrinfo:fam ai)
+                             (addrinfo:socktype ai)
+                             (addrinfo:protocol ai)))
+                 (key "testkey")
+                 (value "guix"))
+            (connect s (addrinfo:addr ai))
+
+            (test-equal "set"
+              "STORED\r"
+              (begin
+                (simple-format s "set ~A 0 60 ~A\r\n~A\r\n"
+                               key
+                               (string-length value)
+                               value)
+                (read-line s)))
+
+            (test-equal "get"
+              (simple-format #f "VALUE ~A 0 ~A\r~A\r"
+                             key
+                             (string-length value)
+                             value)
+              (begin
+                (simple-format s "get ~A\r\n" key)
+                (string-append
+                 (read-line s)
+                 (read-line s))))
+
+            (close-port s))
+
+          ;; There should be a log file in here.
+          (test-assert "log file"
+            (marionette-eval
+             '(file-exists? "/var/log/memcached")
+             marionette))
+
+          (test-end)
+          (exit (= (test-runner-fail-count (test-runner-current)) 0)))))
+
+  (gexp->derivation "memcached-test" test))
+
+(define %test-memcached
+  (system-test
+   (name "memcached")
+   (description "Connect to a running MEMCACHED server.")
+   (value (run-memcached-test))))