From 0adfe95a3eee335847c3127edde3de550e692440 Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Thu, 17 Sep 2015 23:44:26 +0200 Subject: services: Introduce extensible services. This patch rewrites GuixSD services to make them extensible. * gnu-system.am (GNU_SYSTEM_MODULES): Add gnu/services/dbus.scm. * gnu/services.scm (): Replace with new record type. (, ): New record types. (write-service-type, compute-boot-script, second-argument): New procedures. (%boot-service, boot-service-type): New variables. (file-union, directory-union, modprobe-wrapper, activation-service->script, activation-script, gexps->activation-gexp): New procedures. (activation-service-type, %activation-service): New variables. (etc-directory, files->etc-directory, etc-service): New procedures. (etc-service-type, setuid-program-service, firmware-service-type): New variables. (firmware->activation-gexp): New procedure. (&service-error, &missing-target-service-error, &ambiguous-target-service-error): New condition types. (service-back-edges, fold-services): New procedures. * gnu/services/avahi.scm (): New record type. (configuration-file): Replace keyword parameters with a single 'config' parameter. (%avahi-accounts, %avahi-activation, avahi-service-type): New variables. (avahi-dmd-service): New procedure. (avahi-service): Rewrite using 'service' and 'avahi-configuration'. * gnu/services/base.scm (%root-file-system-dmd-service, root-file-system-service-type): New variables. (root-file-system-service): Use them. (file-system->dmd-service-name): New procedure. (file-system-service-type): New variable. (file-system-service): Use it. Replace keyword parameters with a single 'file-system' object. (user-unmount-service-type): New variable. (user-unmount-service): Use it. (user-processes-service-type): New variable. (user-processes-service): Use it. (host-name-service-type): New variable. (host-name-service): Use it. (console-keymap-service-type): New variable. (console-keymap-service): Use it. (console-font-service-type): New variable. (console-font-service): Use it. (mingetty-pam-service, mingetty-dmd-service): New procedures. (mingetty-service-type): New variable. (mingetty-service): Use it. (nscd-dmd-service): New procedure. (nscd-activation, nscd-service-type): New variables. (nscd-service): Use the latter. (syslog-service-type): New variable. (syslog-service): Use it. (): New record type. (%default-guix-configuration): New variable. (guix-dmd-service, guix-accounts, guix-activation): New procedures. (guix-service-type): New variable. (guix-service): Replace list of keyword parameters with a single 'config' parameter. Rewrite using 'service'. (): New record type. (udev-dmd-service): New procedure. (udev-service-type): New variable. (udev-service): Use it. (device-mapping-service-type): New variable. (device-mapping-service): Use it. (swap-service-type): New variable. (swap-service): Use it. * gnu/services/databases.scm (): New record type. (%postgresql-accounts, postgresql-activation): New variables. (postgresql-dmd-service): New procedure. (postgresql-service): Rewrite using 'service' and 'postgresql-configuration'. * gnu/services/dbus.scm: New file. * gnu/services/desktop.scm (dbus-configuration-directory, dbus-service): Remove. (wrapped-dbus-service): New procedure. (): New record type. (upower-configuration-file): Replace keyword parameters with single parameter. (%upower-accounts, %upower-activation): New variables. (upower-dbus-service, upower-dmd-service): New procedures. (upower-service-type): New variable. (upower-service): Rewrite using 'service' and 'upower-configuration'. (%colord-activation, %colord-accounts): New variables. (colord-dmd-service): New procedure. (colord-service-type): New variable. (colord-service): Rewrite using 'service'. (): New record type. (geoclue-configuration-file): Replace keyword parameters with a single 'config' parameter. (geoclue-dbus-service, geoclue-dmd-service): New procedures. (%geoclue-accounts, geoclue-service-type): New variables. (geoclue-service): Rewrite using 'service' and 'geoclue-configuration'. (%polkit-accounts, %polkit-pam-services, polkit-service-type): New variables. (polkit-dmd-service): New procedure. (polkit-service): Rewrite using 'service'. ()[elogind]: New field. (elogind-dmd-service): New procedure. (elogind-service-type): New variable. (elogind-service): Rewrite using 'service'. (%desktop-services): Remove argument to 'dbus-service'. Remove 'map' over %BASE-SERVICES. * gnu/services/dmd.scm (dmd-boot-gexp): New procedure. (dmd-root-service-type, %dmd-root-service): New variables. (dmd-service-type): New macro. (): New record type. * gnu/services/lirc.scm (): New record type. (%lirc-activation): New variable. (lirc-dmd-service): New procedure. (lirc-service-type): New variable. (lirc-service): Rewrite using 'service' and 'lirc-configuration'. * gnu/services/networking.scm (): New record type. (static-networking-service-type): New variable. (static-networking-service): Rewrite using 'service' and 'static-networking'. (dhcp-client-service-type): New variable. (dhcp-client-service): Rewrite using 'service'. (): New record type. (ntp-dmd-service): New procedure. (ntp-service-type): New variable. (ntp-service): New procedure. (%tor-accounts, tor-service-type): New variable. (tor-dmd-service): New procedure. (tor-service): Rewrite using 'service'. (): New record type. (bitlbee-dmd-service): New procedure. (%bitlbee-accounts, %bitlbee-activation, bitlbee-service-type): New variables. (bitlbee-service): Rewrite using 'service'. (%wicd-activation): New variable. (wicd-dmd-service): New procedure. (wicd-service-type): New variable. (wicd-service): Rewrite using 'service'. * gnu/services/ssh.scm (): New record type. (activation): Rename to... (lsh-initialization): ... this. (lsh-activation, lsh-dmd-service, lsh-pam-services): New procedures. (lsh-service-type): New variable. (lsh-service): Rewrite using 'service' and 'lsh-configuration'. * gnu/services/web.scm (): New record type. (%nginx-accounts): New variable. (nginx-activation, nginx-dmd-service): New procedures. (nginx-service-type): New variable. (nginx-service): Rewrite using 'service' and 'nginx-configuration'. * gnu/services/xorg.scm (): New record type. (slim-pam-service, slim-dmd-service): New procedures. (slim-service-type): New variable. (slim-service): Rewrite using 'service' and 'slim-configuration'. * gnu/system.scm (file-union): Remove. (other-file-system-services): Adjust to new 'file-system-service' signature. (essential-services): Add #:container? parameter. Add %DMD-ROOT-SERVICE, %ACTIVATION-SERVICE, and calls to 'pam-root-service', 'account-service', 'operating-system-etc-service', and a SETUID-PROGRAM-SERVICE instance. (operating-system-services): Pass #:container? to 'essential-services. (etc-directory): Remove. (operating-system-etc-service): New procedure. Rewrite as a call to 'etc-service'. (operating-system-accounts): Change to not return accounts required by services. (operating-system-etc-directory): Rewrite as a call to 'fold-services' and 'etc-directory'. (user-group->gexp, user-account->gexp, modprobe-wrapper): Remove. (operating-system-activation-script): Rewrite as a call to 'fold-services' and 'activation-service->script'. (operating-system-boot-script): Likewise. (operating-system-derivation): Add call to 'lower-object'. (emacs-site-file, emacs-site-directory, shells-file): Change to use 'computed-file' and 'scheme-file' instead of the monadic procedures. * gnu/system/install.scm (cow-store-service-type): New variable. (cow-store-service): Rewrite using 'service'. (/etc/configuration-files): New procedure. (configuration-template-service-type, %configuration-template-service): New variables. (configuration-template-service): Remove. (installation-services): Adjust accordingly. Adjust argument to 'guix-service'. * gnu/system/linux.scm (/etc-entry, pam-root-service): New procedures. (pam-root-service-type): New variable. * gnu/system/shadow.scm (user-group->gexp, user-account->gexp, account-activation, etc-skel, account-service): New procedures. (account-service-type): New variable. * tests/services.scm: New file. * doc/guix.texi (Base Services, Desktop Services): Adjust accordingly. (Defining Services): Rewrite. * doc/images/service-graph.dot: New file. * doc.am (DOT_FILES): Add it. * po/guix/POTFILES.in: Add gnu/services.scm. --- gnu/services/databases.scm | 144 +++++++++++++++++++++++++++------------------ 1 file changed, 86 insertions(+), 58 deletions(-) (limited to 'gnu/services/databases.scm') diff --git a/gnu/services/databases.scm b/gnu/services/databases.scm index 20f8a6977e..8fdd222a3b 100644 --- a/gnu/services/databases.scm +++ b/gnu/services/databases.scm @@ -19,12 +19,13 @@ (define-module (gnu services databases) #:use-module (gnu services) + #:use-module (gnu services dmd) #:use-module (gnu system shadow) #:use-module (gnu packages admin) #:use-module (gnu packages databases) #:use-module (guix records) - #:use-module (guix store) #:use-module (guix gexp) + #:use-module (ice-9 match) #:export (postgresql-service)) ;;; Commentary: @@ -33,6 +34,14 @@ ;;; ;;; Code: +(define-record-type* + postgresql-configuration make-postgresql-configuration + postgresql-configuration? + (postgresql postgresql-configuration-postgresql ; + (default postgresql)) + (config-file postgresql-configuration-file) + (data-directory postgresql-configuration-data-directory)) + (define %default-postgres-hba (plain-file "pg_hba.conf" " @@ -49,6 +58,77 @@ host all all ::1/128 trust")) "hba_file = '" %default-postgres-hba "'\n" "ident_file = '" %default-postgres-ident "\n")) +(define %postgresql-accounts + (list (user-group (name "postgres") (system? #t)) + (user-account + (name "postgres") + (group "postgres") + (system? #t) + (comment "PostgreSQL server user") + (home-directory "/var/empty") + (shell #~(string-append #$shadow "/sbin/nologin"))))) + +(define postgresql-activation + (match-lambda + (($ postgresql config-file data-directory) + #~(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 #$data-directory (passwd:uid user) (passwd:gid user)) + + ;; Drop privileges and init state directory in a new + ;; process. Wait for it to finish before proceeding. + (match (primitive-fork) + (0 + ;; Exit with a non-zero status code if an exception is thrown. + (dynamic-wind + (const #t) + (lambda () + (setgid (passwd:gid user)) + (setuid (passwd:uid user)) + (primitive-exit (system* initdb "-D" #$data-directory))) + (lambda () + (primitive-exit 1)))) + (pid (waitpid pid)))))))) + +(define postgresql-dmd-service + (match-lambda + (($ postgresql config-file data-directory) + (let ((start-script + ;; Wrapper script that switches to the 'postgres' user before + ;; launching daemon. + (program-file "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" #$data-directory))))) + (list (dmd-service + (provision '(postgres)) + (documentation "Run the PostgreSQL daemon.") + (requirement '(user-processes loopback)) + (start #~(make-forkexec-constructor #$start-script)) + (stop #~(make-kill-destructor)))))))) + +(define postgresql-service-type + (service-type (name 'postgresql) + (extensions + (list (service-extension dmd-root-service-type + postgresql-dmd-service) + (service-extension activation-service-type + postgresql-activation) + (service-extension account-service-type + (const %postgresql-accounts)))))) + (define* (postgresql-service #:key (postgresql postgresql) (config-file %default-postgres-config) (data-directory "/var/lib/postgresql/data")) @@ -56,60 +136,8 @@ host all all ::1/128 trust")) 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 - (program-file "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 - ;; Exit with a non-zero status code if an exception is thrown. - (dynamic-wind - (const #t) - (lambda () - (setgid (passwd:gid user)) - (setuid (passwd:uid user)) - (primitive-exit (system* initdb "-D" #$data-directory))) - (lambda () - (primitive-exit 1)))) - (pid (waitpid pid)))))) - - (service - (provision '(postgres)) - (documentation "Run the PostgreSQL daemon.") - (requirement '(user-processes loopback)) - (start #~(make-forkexec-constructor #$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"))))))) + (service postgresql-service-type + (postgresql-configuration + (postgresql postgresql) + (config-file config-file) + (data-directory data-directory)))) -- cgit v1.2.3