guix/gnu/tests/databases.scm
Christopher Baines 6230e155af
gnu: Fix memcached service startup.
Memcached changes to the memcached user from root before writing the PID
file. This means that it must be able to write the PID file as the memcached
user.

To make this work, create the /var/run/memcached directory when the service
starts, make it owned by memcached, and change memcached to write the PID file
to /var/run/memcached/pid.

This wasn't picked up by the system test as the "service running" part was too
permissive, and only failed on an error. Instead, test the response from
calling start-service and check that the PID is a number.

* gnu/services/databases.scm (memcached-activation): New variable.
  (memcached-shepherd-service): Change PID file location.
  (memcached-service-type): Extend the activation-service-type.
* gnu/tests/databases.scm (run-memcached-test)[test]: Change the "service
  running" test to check the response from the shepherd.
2017-08-15 22:24:15 +01:00

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Scheme

;;; 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 #$output)
(test-begin "memcached")
;; Wait for memcached to be up and running.
(test-assert "service running"
(marionette-eval
'(begin
(use-modules (gnu services herd))
(match (start-service 'memcached)
(#f #f)
(('service response-parts ...)
(match (assq-ref response-parts 'running)
((pid) (number? pid))))))
marionette))
(let* ((ai (car (getaddrinfo "localhost"
#$(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))))