From 888bb58253ab708f38609aa839e77a46a96bd0df Mon Sep 17 00:00:00 2001 From: David Thompson Date: Sun, 3 May 2015 17:02:59 -0400 Subject: [PATCH] gnu: Add postgresql-service. * gnu/services/databases.scm: New file. * gnu-system.am (GNU_SYSTEM_MODULES): Add it. * doc/guix.texi ("Database Services"): New subsubsection. --- doc/guix.texi | 16 +++++++ gnu-system.am | 1 + gnu/services/databases.scm | 114 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 131 insertions(+) create mode 100644 gnu/services/databases.scm diff --git a/doc/guix.texi b/doc/guix.texi index dd6af80..5da12f7 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -4577,6 +4577,7 @@ declaration. * Base Services:: Essential system services. * Networking Services:: Network setup, SSH daemon, etc. * X Window:: Graphical display. +* Database Services:: SQL databases. * Various Services:: Other services. @end menu @@ -4916,6 +4917,21 @@ appropriate screen resolution; otherwise, it must be a list of resolutions---e.g., @code{((1024 768) (640 480))}. @end deffn +@node Database Services +@subsubsection Database Services + +The @code{(gnu services databases)} module provides the following service. + +@deffn {Monadic Procedure} postgresql-service [#:postgresql postgresql] @ + [#:config-file] [#:data-directory ``/var/lib/postgresql/data''] +Return a service that runs @var{postgresql}, the PostgreSQL database +server. + +The PostgreSQL daemon loads its runtime configuration from +@var{config-file} and stores the database cluster in +@var{data-directory}. +@end deffn + @node Various Services @subsubsection Various Services diff --git a/gnu-system.am b/gnu-system.am index bb6601e..8596049 100644 --- a/gnu-system.am +++ b/gnu-system.am @@ -328,6 +328,7 @@ GNU_SYSTEM_MODULES = \ gnu/services/avahi.scm \ gnu/services/base.scm \ gnu/services/colord.scm \ + gnu/services/databases.scm \ gnu/services/dbus.scm \ gnu/services/dmd.scm \ gnu/services/lirc.scm \ diff --git a/gnu/services/databases.scm b/gnu/services/databases.scm new file mode 100644 index 0000000..a275396 --- /dev/null +++ b/gnu/services/databases.scm @@ -0,0 +1,114 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2015 +;;; +;;; 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 . + +(define-module (gnu services databases) + #:use-module (gnu services) + #:use-module (gnu system shadow) + #:use-module (gnu packages admin) + #:use-module (gnu packages databases) + #:use-module (guix records) + #:use-module (guix monads) + #:use-module (guix store) + #:use-module (guix gexp) + #:export (postgresql-service)) + +;;; Commentary: +;;; +;;; Database services. +;;; +;;; Code: + +(define %default-postgres-hba + (text-file* "pg_hba.conf" + "local all all trust\n" + "host all all 127.0.0.1/32 trust\n" + "host all all ::1/128 trust\n")) + +(define %default-postgres-ident + (text-file* "pg_ident.conf" + "# MAPNAME SYSTEM-USERNAME PG-USERNAME")) + +(define %default-postgres-config + (mlet %store-monad ((hba %default-postgres-hba) + (ident %default-postgres-ident)) + (text-file* "postgresql.conf" + ;; The daemon will not start without these. + "hba_file = '" hba "'\n" + "ident_file = '" ident "'\n"))) + +(define* (postgresql-service #:key (postgresql postgresql) + (config-file %default-postgres-config) + (data-directory "/var/lib/postgresql/data")) + "Return a service that runs @var{postgresql}, the PostgreSQL database server. + +The PostgreSQL daemon loads its runtime configuration from @var{config-file} +and stores the database cluster in @var{data-directory}." + ;; Wrapper script that switches to the 'postgres' user before launching + ;; daemon. + (define start-script + (mlet %store-monad ((config-file config-file)) + (gexp->script "start-postgres" + #~(let ((user (getpwnam "postgres")) + (postgres (string-append #$postgresql + "/bin/postgres"))) + (setgid (passwd:gid user)) + (setuid (passwd:uid user)) + (system* postgres + (string-append "--config-file=" #$config-file) + "-D" #$data-directory))))) + + (define activate + #~(begin + (use-modules (guix build utils) + (ice-9 match)) + + (let ((user (getpwnam "postgres")) + (initdb (string-append #$postgresql "/bin/initdb"))) + ;; Create db state directory. + (mkdir-p #$data-directory) + (chown #$data-directory (passwd:uid user) (passwd:gid user)) + + ;; Drop privileges and init state directory in a new + ;; process. Wait for it to finish before proceeding. + (match (primitive-fork) + (0 + (setgid (passwd:gid user)) + (setuid (passwd:uid user)) + (primitive-exit (system* initdb "-D" #$data-directory))) + (pid (waitpid pid)))))) + + (mlet %store-monad ((start-script start-script)) + (return + (service + (provision '(postgres)) + (documentation "Run the PostgreSQL daemon.") + (requirement '(user-processes loopback)) + (start #~(make-forkexec-constructor #$start-script)) + (stop #~(make-kill-destructor)) + (activate activate) + (user-groups (list (user-group + (name "postgres") + (system? #t)))) + (user-accounts (list (user-account + (name "postgres") + (group "postgres") + (system? #t) + (comment "PostgreSQL server user") + (home-directory "/var/empty") + (shell + #~(string-append #$shadow "/sbin/nologin"))))))))) -- 2.1.4