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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.
454 lines
18 KiB
Scheme
454 lines
18 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2015 David Thompson <davet@gnu.org>
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;;; Copyright © 2015, 2016 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2016 Leo Famulari <leo@famulari.name>
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;;; Copyright © 2017 Christopher Baines <mail@cbaines.net>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu services databases)
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#:use-module (gnu services)
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#:use-module (gnu services shepherd)
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#:use-module (gnu system shadow)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages databases)
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#:use-module (guix modules)
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#:use-module (guix records)
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#:use-module (guix gexp)
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#:use-module (ice-9 match)
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#:export (postgresql-configuration
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postgresql-configuration?
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postgresql-service
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postgresql-service-type
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memcached-service-type
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<memcached-configuration>
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memcached-configuration
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memcached-configuration?
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memcached-configuration-memecached
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memcached-configuration-interfaces
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memcached-configuration-tcp-port
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memcached-configuration-udp-port
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memcached-configuration-additional-options
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mysql-service
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mysql-service-type
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mysql-configuration
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mysql-configuration?
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redis-configuration
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redis-configuration?
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redis-service-type))
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;;; Commentary:
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;;;
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;;; Database services.
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;;;
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;;; Code:
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(define-record-type* <postgresql-configuration>
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postgresql-configuration make-postgresql-configuration
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postgresql-configuration?
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(postgresql postgresql-configuration-postgresql ;<package>
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(default postgresql))
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(port postgresql-configuration-port
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(default 5432))
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(locale postgresql-configuration-locale
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(default "en_US.utf8"))
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(config-file postgresql-configuration-file)
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(data-directory postgresql-configuration-data-directory))
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(define %default-postgres-hba
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(plain-file "pg_hba.conf"
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"
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local all all trust
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host all all 127.0.0.1/32 trust
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host all all ::1/128 trust"))
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(define %default-postgres-ident
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(plain-file "pg_ident.conf"
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"# MAPNAME SYSTEM-USERNAME PG-USERNAME"))
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(define %default-postgres-config
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(mixed-text-file "postgresql.conf"
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"log_destination = 'syslog'\n"
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"hba_file = '" %default-postgres-hba "'\n"
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"ident_file = '" %default-postgres-ident "'\n"))
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(define %postgresql-accounts
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(list (user-group (name "postgres") (system? #t))
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(user-account
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(name "postgres")
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(group "postgres")
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(system? #t)
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(comment "PostgreSQL server user")
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(home-directory "/var/empty")
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(shell (file-append shadow "/sbin/nologin")))))
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(define postgresql-activation
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(match-lambda
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(($ <postgresql-configuration> postgresql port locale config-file data-directory)
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#~(begin
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(use-modules (guix build utils)
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(ice-9 match))
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(let ((user (getpwnam "postgres"))
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(initdb (string-append #$postgresql "/bin/initdb"))
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(initdb-args
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(append
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(if #$locale
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(list (string-append "--locale=" #$locale))
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'()))))
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;; Create db state directory.
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(mkdir-p #$data-directory)
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(chown #$data-directory (passwd:uid user) (passwd:gid user))
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;; Drop privileges and init state directory in a new
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;; process. Wait for it to finish before proceeding.
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(match (primitive-fork)
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(0
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;; Exit with a non-zero status code if an exception is thrown.
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(dynamic-wind
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(const #t)
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(lambda ()
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(setgid (passwd:gid user))
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(setuid (passwd:uid user))
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(primitive-exit
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(apply system*
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initdb
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"-D"
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#$data-directory
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initdb-args)))
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(lambda ()
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(primitive-exit 1))))
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(pid (waitpid pid))))))))
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(define postgresql-shepherd-service
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(match-lambda
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(($ <postgresql-configuration> postgresql port locale config-file data-directory)
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(let ((start-script
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;; Wrapper script that switches to the 'postgres' user before
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;; launching daemon.
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(program-file "start-postgres"
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#~(let ((user (getpwnam "postgres"))
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(postgres (string-append #$postgresql
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"/bin/postgres")))
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(setgid (passwd:gid user))
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(setuid (passwd:uid user))
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(system* postgres
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(string-append "--config-file="
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#$config-file)
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"-p" (number->string #$port)
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"-D" #$data-directory)))))
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(list (shepherd-service
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(provision '(postgres))
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(documentation "Run the PostgreSQL daemon.")
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(requirement '(user-processes loopback syslogd))
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(start #~(make-forkexec-constructor #$start-script))
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(stop #~(make-kill-destructor))))))))
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(define postgresql-service-type
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(service-type (name 'postgresql)
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(extensions
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(list (service-extension shepherd-root-service-type
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postgresql-shepherd-service)
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(service-extension activation-service-type
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postgresql-activation)
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(service-extension account-service-type
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(const %postgresql-accounts))))))
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(define* (postgresql-service #:key (postgresql postgresql)
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(port 5432)
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(locale "en_US.utf8")
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(config-file %default-postgres-config)
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(data-directory "/var/lib/postgresql/data"))
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"Return a service that runs @var{postgresql}, the PostgreSQL database server.
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The PostgreSQL daemon loads its runtime configuration from @var{config-file}
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and stores the database cluster in @var{data-directory}."
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(service postgresql-service-type
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(postgresql-configuration
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(postgresql postgresql)
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(port port)
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(locale locale)
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(config-file config-file)
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(data-directory data-directory))))
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;;;
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;;; Memcached
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;;;
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(define-record-type* <memcached-configuration>
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memcached-configuration make-memcached-configuration
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memcached-configuration?
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(memcached memcached-configuration-memcached ;<package>
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(default memcached))
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(interfaces memcached-configuration-interfaces
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(default '("0.0.0.0")))
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(tcp-port memcached-configuration-tcp-port
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(default 11211))
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(udp-port memcached-configuration-udp-port
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(default 11211))
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(additional-options memcached-configuration-additional-options
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(default '())))
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(define %memcached-accounts
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(list (user-group (name "memcached") (system? #t))
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(user-account
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(name "memcached")
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(group "memcached")
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(system? #t)
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(comment "Memcached server user")
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(home-directory "/var/empty")
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(shell (file-append shadow "/sbin/nologin")))))
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(define memcached-activation
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#~(begin
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(use-modules (guix build utils))
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(let ((user (getpwnam "memcached")))
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(mkdir-p "/var/run/memcached")
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(chown "/var/run/memcached"
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(passwd:uid user) (passwd:gid user)))))
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(define memcached-shepherd-service
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(match-lambda
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(($ <memcached-configuration> memcached interfaces tcp-port udp-port
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additional-options)
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(with-imported-modules (source-module-closure
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'((gnu build shepherd)))
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(list (shepherd-service
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(provision '(memcached))
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(documentation "Run the Memcached daemon.")
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(requirement '(user-processes loopback))
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(modules '((gnu build shepherd)))
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(start #~(make-forkexec-constructor
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`(#$(file-append memcached "/bin/memcached")
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"-l" #$(string-join interfaces ",")
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"-p" #$(number->string tcp-port)
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"-U" #$(number->string udp-port)
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"--daemon"
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;; Memcached changes to the memcached user prior to
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;; writing the pid file, so write it to a directory
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;; that memcached owns.
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"-P" "/var/run/memcached/pid"
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"-u" "memcached"
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,#$@additional-options)
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#:log-file "/var/log/memcached"
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#:pid-file "/var/run/memcached/pid"))
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(stop #~(make-kill-destructor))))))))
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(define memcached-service-type
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(service-type (name 'memcached)
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(extensions
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(list (service-extension shepherd-root-service-type
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memcached-shepherd-service)
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(service-extension activation-service-type
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(const memcached-activation))
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(service-extension account-service-type
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(const %memcached-accounts))))
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(default-value (memcached-configuration))))
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;;;
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;;; MySQL.
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;;;
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(define-record-type* <mysql-configuration>
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mysql-configuration make-mysql-configuration
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mysql-configuration?
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(mysql mysql-configuration-mysql (default mariadb))
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(port mysql-configuration-port (default 3306)))
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(define %mysql-accounts
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(list (user-group
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(name "mysql")
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(system? #t))
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(user-account
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(name "mysql")
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(group "mysql")
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(system? #t)
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(home-directory "/var/empty")
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(shell (file-append shadow "/sbin/nologin")))))
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(define mysql-configuration-file
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(match-lambda
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(($ <mysql-configuration> mysql port)
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(mixed-text-file "my.cnf" "[mysqld]
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datadir=/var/lib/mysql
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socket=/run/mysqld/mysqld.sock
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port=" (number->string port) "
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"))))
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(define (%mysql-activation config)
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"Return an activation gexp for the MySQL or MariaDB database server."
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(let ((mysql (mysql-configuration-mysql config))
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(my.cnf (mysql-configuration-file config)))
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#~(begin
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(use-modules (ice-9 popen)
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(guix build utils))
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(let* ((mysqld (string-append #$mysql "/bin/mysqld"))
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(user (getpwnam "mysql"))
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(uid (passwd:uid user))
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(gid (passwd:gid user))
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(datadir "/var/lib/mysql")
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(rundir "/run/mysqld"))
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(mkdir-p datadir)
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(chown datadir uid gid)
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(mkdir-p rundir)
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(chown rundir uid gid)
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;; Initialize the database when it doesn't exist.
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(when (not (file-exists? (string-append datadir "/mysql")))
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(if (string-prefix? "mysql-" (strip-store-file-name #$mysql))
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;; For MySQL.
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(system* mysqld
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(string-append "--defaults-file=" #$my.cnf)
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"--initialize"
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"--user=mysql")
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;; For MariaDB.
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;; XXX: The 'mysql_install_db' script doesn't work directly
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;; due to missing 'mkdir' in PATH.
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(let ((p (open-pipe* OPEN_WRITE mysqld
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(string-append
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"--defaults-file=" #$my.cnf)
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"--bootstrap"
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"--user=mysql")))
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;; Create the system database, as does by 'mysql_install_db'.
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(display "create database mysql;\n" p)
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(display "use mysql;\n" p)
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(for-each
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(lambda (sql)
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(call-with-input-file
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(string-append #$mysql "/share/mysql/" sql)
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(lambda (in) (dump-port in p))))
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'("mysql_system_tables.sql"
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"mysql_performance_tables.sql"
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"mysql_system_tables_data.sql"
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"fill_help_tables.sql"))
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;; Remove the anonymous user and disable root access from
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;; remote machines, as does by 'mysql_secure_installation'.
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(display "
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DELETE FROM user WHERE User='';
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DELETE FROM user WHERE User='root' AND
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Host NOT IN ('localhost', '127.0.0.1', '::1');
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FLUSH PRIVILEGES;
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" p)
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(close-pipe p))))))))
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(define (mysql-shepherd-service config)
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(list (shepherd-service
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(provision '(mysql))
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(documentation "Run the MySQL server.")
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(start (let ((mysql (mysql-configuration-mysql config))
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(my.cnf (mysql-configuration-file config)))
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#~(make-forkexec-constructor
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(list (string-append #$mysql "/bin/mysqld")
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(string-append "--defaults-file=" #$my.cnf))
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#:user "mysql" #:group "mysql")))
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(stop #~(make-kill-destructor)))))
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(define mysql-service-type
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(service-type
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(name 'mysql)
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(extensions
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(list (service-extension account-service-type
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(const %mysql-accounts))
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(service-extension activation-service-type
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%mysql-activation)
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(service-extension shepherd-root-service-type
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mysql-shepherd-service)))))
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(define* (mysql-service #:key (config (mysql-configuration)))
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"Return a service that runs @command{mysqld}, the MySQL or MariaDB
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database server.
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The optional @var{config} argument specifies the configuration for
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@command{mysqld}, which should be a @code{<mysql-configuration>} object."
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(service mysql-service-type config))
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;;;
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;;; Redis
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;;;
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(define-record-type* <redis-configuration>
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redis-configuration make-redis-configuration
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redis-configuration?
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(redis redis-configuration-redis ;<package>
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(default redis))
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(bind redis-configuration-bind
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(default "127.0.0.1"))
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(port redis-configuration-port
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(default 6379))
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(working-directory redis-configuration-working-directory
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(default "/var/lib/redis"))
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(config-file redis-configuration-config-file
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(default #f)))
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(define (default-redis.conf bind port working-directory)
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(mixed-text-file "redis.conf"
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"bind " bind "\n"
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"port " (number->string port) "\n"
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"dir " working-directory "\n"
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"daemonize no\n"))
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(define %redis-accounts
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(list (user-group (name "redis") (system? #t))
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(user-account
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(name "redis")
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(group "redis")
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(system? #t)
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(comment "Redis server user")
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(home-directory "/var/empty")
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(shell (file-append shadow "/sbin/nologin")))))
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(define redis-activation
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(match-lambda
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(($ <redis-configuration> redis bind port working-directory config-file)
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#~(begin
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(use-modules (guix build utils)
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(ice-9 match))
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(let ((user (getpwnam "redis")))
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(mkdir-p #$working-directory)
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(chown #$working-directory (passwd:uid user) (passwd:gid user)))))))
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(define redis-shepherd-service
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(match-lambda
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(($ <redis-configuration> redis bind port working-directory config-file)
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(let ((config-file
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(or config-file
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(default-redis.conf bind port working-directory))))
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(list (shepherd-service
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(provision '(redis))
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(documentation "Run the Redis daemon.")
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(requirement '(user-processes syslogd))
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(start #~(make-forkexec-constructor
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'(#$(file-append redis "/bin/redis-server")
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#$config-file)
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#:user "redis"
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#:group "redis"))
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(stop #~(make-kill-destructor))))))))
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(define redis-service-type
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(service-type (name 'redis)
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(extensions
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(list (service-extension shepherd-root-service-type
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redis-shepherd-service)
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(service-extension activation-service-type
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redis-activation)
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(service-extension account-service-type
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(const %redis-accounts))))))
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