;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2015 David Thompson ;;; Copyright © 2015, 2016, 2022 Ludovic Courtès ;;; Copyright © 2016 Leo Famulari ;;; Copyright © 2017 Christopher Baines ;;; Copyright © 2018 Clément Lassieur ;;; Copyright © 2018 Julien Lepiller ;;; Copyright © 2019 Robert Vollmert ;;; Copyright © 2020, 2022 Marius Bakke ;;; Copyright © 2021 David Larsson ;;; Copyright © 2021 Aljosha Papsch ;;; ;;; 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 services shepherd) #:use-module (gnu system shadow) #:use-module (gnu packages admin) #:use-module (gnu packages databases) #:use-module (guix build-system trivial) #:use-module (guix build union) #:use-module (guix deprecation) #:use-module (guix modules) #:use-module (guix packages) #:use-module (guix records) #:use-module (guix gexp) #:use-module (srfi srfi-1) #:use-module (ice-9 match) #:export (postgresql-config-file postgresql-config-file? postgresql-config-file-log-destination postgresql-config-file-hba-file postgresql-config-file-ident-file postgresql-config-file-socket-directory postgresql-config-file-extra-config postgresql-configuration postgresql-configuration? postgresql-configuration-postgresql postgresql-configuration-port postgresql-configuration-locale postgresql-configuration-file postgresql-configuration-log-directory postgresql-configuration-data-directory postgresql-configuration-extension-packages postgresql-service postgresql-service-type postgresql-role postgresql-role? postgresql-role-name postgresql-role-permissions postgresql-role-create-database? postgresql-role-configuration postgresql-role-configuration? postgresql-role-configuration-host postgresql-role-configuration-roles postgresql-role-service-type memcached-service-type memcached-configuration memcached-configuration? memcached-configuration-memecached memcached-configuration-interfaces memcached-configuration-tcp-port memcached-configuration-udp-port memcached-configuration-additional-options mysql-service mysql-service-type mysql-configuration mysql-configuration? redis-configuration redis-configuration? redis-service-type)) ;;; Commentary: ;;; ;;; Database services. ;;; ;;; Code: (define %default-postgres-hba (plain-file "pg_hba.conf" " local all all peer host all all 127.0.0.1/32 md5 host all all ::1/128 md5")) (define %default-postgres-ident (plain-file "pg_ident.conf" "# MAPNAME SYSTEM-USERNAME PG-USERNAME")) (define-record-type* postgresql-config-file make-postgresql-config-file postgresql-config-file? (log-destination postgresql-config-file-log-destination (default "syslog")) (hba-file postgresql-config-file-hba-file (default %default-postgres-hba)) (ident-file postgresql-config-file-ident-file (default %default-postgres-ident)) (socket-directory postgresql-config-file-socket-directory (default "/var/run/postgresql")) (extra-config postgresql-config-file-extra-config (default '()))) (define-gexp-compiler (postgresql-config-file-compiler (file ) system target) (match file (($ log-destination hba-file ident-file socket-directory extra-config) ;; See: https://www.postgresql.org/docs/current/config-setting.html. (define (format-value value) (cond ((boolean? value) (list (if value "on" "off"))) ((number? value) (list (number->string value))) (else (list "'" value "'")))) (define contents (append-map (match-lambda ((key) '()) ((key . #f) '()) ((key values ...) `(,key " = " ,@(append-map format-value values) "\n"))) `(("log_destination" ,log-destination) ("hba_file" ,hba-file) ("ident_file" ,ident-file) ,@(if socket-directory `(("unix_socket_directories" ,socket-directory)) '()) ,@extra-config))) (gexp->derivation "postgresql.conf" #~(call-with-output-file (ungexp output "out") (lambda (port) (display (string-append #$@contents) port))) #:local-build? #t)))) (define-record-type* postgresql-configuration make-postgresql-configuration postgresql-configuration? (postgresql postgresql-configuration-postgresql) ;file-like (port postgresql-configuration-port (default 5432)) (locale postgresql-configuration-locale (default "en_US.utf8")) (config-file postgresql-configuration-file (default (postgresql-config-file))) (log-directory postgresql-configuration-log-directory (default "/var/log/postgresql")) (data-directory postgresql-configuration-data-directory (default "/var/lib/postgresql/data")) (extension-packages postgresql-configuration-extension-packages (default '()))) (define %postgresql-accounts (list (user-group (name "postgres") (system? #t)) (user-account (name "postgres") (group "postgres") (system? #t) (comment "PostgreSQL server user") (home-directory "/var/empty") (shell (file-append shadow "/sbin/nologin"))))) (define (final-postgresql postgresql extension-packages) (if (null? extension-packages) postgresql (package (inherit postgresql) (source #f) (build-system trivial-build-system) (arguments `(#:modules ((guix build utils) (guix build union)) #:builder (begin (use-modules (guix build utils) (guix build union) (srfi srfi-26)) (union-build (assoc-ref %outputs "out") (map (lambda (input) (cdr input)) %build-inputs)) #t))) (inputs `(("postgresql" ,postgresql) ,@(map (lambda (extension) (list "extension" extension)) extension-packages)))))) (define postgresql-activation (match-lambda (($ postgresql port locale config-file log-directory data-directory extension-packages) #~(begin (use-modules (guix build utils) (ice-9 match)) (let ((user (getpwnam "postgres")) (initdb (string-append #$(final-postgresql postgresql extension-packages) "/bin/initdb")) (initdb-args (append (if #$locale (list (string-append "--locale=" #$locale)) '())))) ;; Create db state directory. (mkdir-p #$data-directory) (chown #$data-directory (passwd:uid user) (passwd:gid user)) ;; Create the socket directory. (let ((socket-directory #$(postgresql-config-file-socket-directory config-file))) (when (string? socket-directory) (mkdir-p socket-directory) (chown socket-directory (passwd:uid user) (passwd:gid user)))) ;; Create the log directory. (when (string? #$log-directory) (mkdir-p #$log-directory) (chown #$log-directory (passwd:uid user) (passwd:gid user))) ;; Drop privileges and init state directory in a new ;; process. Wait for it to finish before proceeding. (match (primitive-fork) (0 ;; Exit with a non-zero status code if an exception is thrown. (dynamic-wind (const #t) (lambda () (setgid (passwd:gid user)) (setuid (passwd:uid user)) (primitive-exit (apply system* initdb "-D" #$data-directory initdb-args))) (lambda () (primitive-exit 1)))) (pid (waitpid pid)))))))) (define postgresql-shepherd-service (match-lambda (($ postgresql port locale config-file log-directory data-directory extension-packages) (let* ((pg_ctl-wrapper ;; Wrapper script that switches to the 'postgres' user before ;; launching daemon. (program-file "pg_ctl-wrapper" #~(begin (use-modules (ice-9 match) (ice-9 format)) (match (command-line) ((_ mode) (let ((user (getpwnam "postgres")) (pg_ctl #$(file-append (final-postgresql postgresql extension-packages) "/bin/pg_ctl")) (options (format #f "--config-file=~a -p ~d" #$config-file #$port))) (setgid (passwd:gid user)) (setuid (passwd:uid user)) (execl pg_ctl pg_ctl "-D" #$data-directory #$@(if (string? log-directory) (list "-l" (string-append log-directory "/pg_ctl.log")) '()) "-o" options mode))))))) (pid-file (in-vicinity data-directory "postmaster.pid")) (action (lambda args #~(lambda _ (invoke #$pg_ctl-wrapper #$@args) (match '#$args (("start") (call-with-input-file #$pid-file read)) (_ #t)))))) (list (shepherd-service (provision '(postgres)) (documentation "Run the PostgreSQL daemon.") (requirement '(user-processes loopback syslogd)) (modules `((ice-9 match) ,@%default-modules)) (start (action "start")) (stop (action "stop")))))))) (define postgresql-service-type (service-type (name 'postgresql) (extensions (list (service-extension shepherd-root-service-type postgresql-shepherd-service) (service-extension activation-service-type postgresql-activation) (service-extension account-service-type (const %postgresql-accounts)) (service-extension profile-service-type (compose list postgresql-configuration-postgresql)))) (default-value (postgresql-configuration (postgresql postgresql-10))) (description "Run the PostgreSQL database server."))) (define-deprecated (postgresql-service #:key (postgresql postgresql) (port 5432) (locale "en_US.utf8") (config-file (postgresql-config-file)) (data-directory "/var/lib/postgresql/data") (extension-packages '())) postgresql-service-type "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}." (service postgresql-service-type (postgresql-configuration (postgresql postgresql) (port port) (locale locale) (config-file config-file) (data-directory data-directory) (extension-packages extension-packages)))) (define-record-type* postgresql-role make-postgresql-role postgresql-role? (name postgresql-role-name) ;string (permissions postgresql-role-permissions (default '(createdb login))) ;list (create-database? postgresql-role-create-database? ;boolean (default #f))) (define-record-type* postgresql-role-configuration make-postgresql-role-configuration postgresql-role-configuration? (host postgresql-role-configuration-host ;string (default "/var/run/postgresql")) (log postgresql-role-configuration-log ;string (default "/var/log/postgresql_roles.log")) (roles postgresql-role-configuration-roles (default '()))) ;list (define (postgresql-create-roles config) ;; See: https://www.postgresql.org/docs/current/sql-createrole.html for the ;; complete permissions list. (define (format-permissions permissions) (let ((dict '(bypassrls createdb createrole login replication superuser))) (string-join (filter-map (lambda (permission) (and (member permission dict) (string-upcase (symbol->string permission)))) permissions) " "))) (define (roles->queries roles) (apply mixed-text-file "queries" (append-map (lambda (role) (match-record role (name permissions create-database?) `("SELECT NOT(EXISTS(SELECT 1 FROM pg_catalog.pg_roles WHERE \ rolname = '" ,name "')) as not_exists;\n" "\\gset\n" "\\if :not_exists\n" "CREATE ROLE \"" ,name "\"" " WITH " ,(format-permissions permissions) ";\n" ,@(if create-database? `("CREATE DATABASE \"" ,name "\"" " OWNER \"" ,name "\";\n") '()) "\\endif\n"))) roles))) (let ((host (postgresql-role-configuration-host config)) (roles (postgresql-role-configuration-roles config))) #~(let ((psql #$(file-append postgresql "/bin/psql"))) (list psql "-a" "-h" #$host "-f" #$(roles->queries roles))))) (define (postgresql-role-shepherd-service config) (match-record config (log) (list (shepherd-service (requirement '(postgres)) (provision '(postgres-roles)) (one-shot? #t) (start #~(lambda args (let ((pid (fork+exec-command #$(postgresql-create-roles config) #:user "postgres" #:group "postgres" #:log-file #$log))) (zero? (cdr (waitpid pid)))))) (documentation "Create PostgreSQL roles."))))) (define postgresql-role-service-type (service-type (name 'postgresql-role) (extensions (list (service-extension shepherd-root-service-type postgresql-role-shepherd-service))) (compose concatenate) (extend (lambda (config extended-roles) (match-record config (host roles) (postgresql-role-configuration (host host) (roles (append roles extended-roles)))))) (default-value (postgresql-role-configuration)) (description "Ensure the specified PostgreSQL roles are created after the PostgreSQL database is started."))) ;;; ;;; Memcached ;;; (define-record-type* memcached-configuration make-memcached-configuration memcached-configuration? (memcached memcached-configuration-memcached ;file-like (default memcached)) (interfaces memcached-configuration-interfaces (default '("0.0.0.0"))) (tcp-port memcached-configuration-tcp-port (default 11211)) (udp-port memcached-configuration-udp-port (default 11211)) (additional-options memcached-configuration-additional-options (default '()))) (define %memcached-accounts (list (user-group (name "memcached") (system? #t)) (user-account (name "memcached") (group "memcached") (system? #t) (comment "Memcached server user") (home-directory "/var/empty") (shell (file-append shadow "/sbin/nologin"))))) (define memcached-activation #~(begin (use-modules (guix build utils)) (let ((user (getpwnam "memcached"))) (mkdir-p "/var/run/memcached") (chown "/var/run/memcached" (passwd:uid user) (passwd:gid user))))) (define memcached-shepherd-service (match-lambda (($ memcached interfaces tcp-port udp-port additional-options) (with-imported-modules (source-module-closure '((gnu build shepherd))) (list (shepherd-service (provision '(memcached)) (documentation "Run the Memcached daemon.") (requirement '(user-processes loopback)) (modules '((gnu build shepherd))) (start #~(make-forkexec-constructor `(#$(file-append memcached "/bin/memcached") "-l" #$(string-join interfaces ",") "-p" #$(number->string tcp-port) "-U" #$(number->string udp-port) "--daemon" ;; Memcached changes to the memcached user prior to ;; writing the pid file, so write it to a directory ;; that memcached owns. "-P" "/var/run/memcached/pid" "-u" "memcached" ,#$@additional-options) #:log-file "/var/log/memcached" #:pid-file "/var/run/memcached/pid")) (stop #~(make-kill-destructor)))))))) (define memcached-service-type (service-type (name 'memcached) (extensions (list (service-extension shepherd-root-service-type memcached-shepherd-service) (service-extension activation-service-type (const memcached-activation)) (service-extension account-service-type (const %memcached-accounts)))) (default-value (memcached-configuration)) (description "Run @command{memcached}, a daemon that provides an in-memory caching service, intended for use by dynamic web applications."))) ;;; ;;; MySQL. ;;; (define-record-type* mysql-configuration make-mysql-configuration mysql-configuration? (mysql mysql-configuration-mysql (default mariadb)) (bind-address mysql-configuration-bind-address (default "127.0.0.1")) (port mysql-configuration-port (default 3306)) (socket mysql-configuration-socket (default "/run/mysqld/mysqld.sock")) (datadir mysql-configuration-datadir (default "/var/lib/mysql")) (extra-content mysql-configuration-extra-content (default "")) (extra-environment mysql-configuration-extra-environment (default #~'())) (auto-upgrade? mysql-configuration-auto-upgrade? (default #t))) (define %mysql-accounts (list (user-group (name "mysql") (system? #t)) (user-account (name "mysql") (group "mysql") (system? #t) (home-directory "/var/empty") (shell (file-append shadow "/sbin/nologin"))))) (define mysql-configuration-file (match-lambda (($ mysql bind-address port socket datadir extra-content) (mixed-text-file "my.cnf" "[mysqld] datadir=" datadir " socket=" socket " bind-address=" bind-address " port=" (number->string port) " " extra-content " ")))) (define (mysql-with-install-lock) "Return a loop function which evals thunk when the install is locked." #~(lambda (thunk) (let loop ((i 0)) (let ((timeout 10) (lock-stat (stat "/var/lib/mysql.lock" #f))) (if (and (not (eq? lock-stat #f)) (eq? (stat:type lock-stat) 'regular)) (apply thunk '()) (if (< i timeout) (begin (sleep 1) (loop (+ 1 i))) (throw 'timeout-error "MySQL installation not locked in time!"))))))) (define (mysql-start config) "Start mysqld if install lock file appears" (program-file "mysql-start" (let ((mysql (mysql-configuration-mysql config)) (my.cnf (mysql-configuration-file config))) #~(let ((mysqld (string-append #$mysql "/bin/mysqld")) (with-lock #$(mysql-with-install-lock))) (with-lock (lambda () (execl mysqld mysqld (string-append "--defaults-file=" #$my.cnf)))))))) (define (mysql-shepherd-service config) (list (shepherd-service (provision '(mysql)) (requirement '(mysql-install)) (documentation "Run the MySQL server.") (start (let ((mysql (mysql-configuration-mysql config)) (extra-env (mysql-configuration-extra-environment config)) (my.cnf (mysql-configuration-file config))) #~(make-forkexec-constructor (list #$(mysql-start config)) #:user "mysql" #:group "mysql" #:log-file "/var/log/mysqld.log" #:environment-variables #$extra-env))) (stop #~(make-kill-destructor))))) (define (mysql-install config) "Install MySQL system database and secure the installation." (let ((mysql (mysql-configuration-mysql config)) (my.cnf (mysql-configuration-file config)) (datadir (mysql-configuration-datadir config)) (extra-env (mysql-configuration-extra-environment config))) (program-file "mysql-install" (with-imported-modules (source-module-closure '((ice-9 popen) (guix build utils))) #~(begin (use-modules (ice-9 popen) (guix build utils)) (let* ((mysqld (string-append #$mysql "/bin/mysqld")) (user (getpwnam "mysql")) (uid (passwd:uid user)) (gid (passwd:gid user)) (datadir #$datadir) (rundir "/run/mysqld")) (mkdir-p datadir) (chown datadir uid gid) (mkdir-p rundir) (chown rundir uid gid) ;; Initialize the database when it doesn't exist. (when (not (file-exists? (string-append datadir "/mysql"))) (if (string-prefix? "mysql-" (strip-store-file-name #$mysql)) ;; For MySQL. (system* mysqld (string-append "--defaults-file=" #$my.cnf) "--initialize" "--user=mysql") ;; For MariaDB. ;; XXX: The 'mysql_install_db' script doesn't work directly ;; due to missing 'mkdir' in PATH. (let ((p (open-pipe* OPEN_WRITE mysqld (string-append "--defaults-file=" #$my.cnf) "--bootstrap" "--user=mysql"))) ;; Create the system database, as does by 'mysql_install_db'. (display "create database mysql;\n" p) (display "use mysql;\n" p) (for-each (lambda (sql) (call-with-input-file (string-append #$mysql:lib "/share/mysql/" sql) (lambda (in) (dump-port in p)))) '("mysql_system_tables.sql" "mysql_performance_tables.sql" "mysql_system_tables_data.sql" "fill_help_tables.sql")) ;; Remove the anonymous user and disable root access from ;; remote machines, as does by 'mysql_secure_installation'. (display " DELETE FROM user WHERE User=''; DELETE FROM user WHERE User='root' AND Host NOT IN ('localhost', '127.0.0.1', '::1'); FLUSH PRIVILEGES; " p) (close-pipe p)))) (call-with-output-file "/var/lib/mysql.lock" (lambda (p) (write #t p))))))))) (define (mysql-install-shepherd-service config) (list (shepherd-service (provision '(mysql-install)) (requirement '(file-systems)) (one-shot? #t) (documentation "Install MySQL system database and secure installation.") (start #~(make-forkexec-constructor (list #$(mysql-install config)) #:log-file "/var/log/mysqld-install.log"))))) (define (mysql-upgrade-wrapper config) ;; The MySQL socket and PID file may appear before the server is ready to ;; accept connections. Ensure the socket is responsive before attempting ;; to run the upgrade script. (let ((mysql (mysql-configuration-mysql config)) (socket-file (mysql-configuration-socket config)) (config-file (mysql-configuration-file config))) (program-file "mysql-upgrade-wrapper" #~(begin (let ((mysql-upgrade #$(file-append mysql "/bin/mysql_upgrade")) (timeout 20)) (begin (let loop ((i 0)) (catch 'system-error (lambda () (let ((sock (socket PF_UNIX SOCK_STREAM 0))) (connect sock AF_UNIX #$socket-file) (close-port sock) ;; The socket is ready! (execl mysql-upgrade mysql-upgrade (string-append "--defaults-file=" #$config-file)))) (lambda args (if (< i timeout) (begin (sleep 1) (loop (+ 1 i))) ;; No luck, give up. (throw 'timeout-error "MySQL server did not appear in time!"))))))))))) (define (mysql-upgrade-shepherd-service config) (list (shepherd-service (provision '(mysql-upgrade)) (requirement '(mysql)) (one-shot? #t) (documentation "Upgrade MySQL database schemas.") (start #~(make-forkexec-constructor (list #$(mysql-upgrade-wrapper config)) #:user "mysql" #:group "mysql" #:log-file "/var/log/mysql_upgrade.log"))))) (define (mysql-shepherd-services config) (let ((min-services (append (mysql-install-shepherd-service config) (mysql-shepherd-service config)))) (if (mysql-configuration-auto-upgrade? config) (append min-services (mysql-upgrade-shepherd-service config)) min-services))) (define mysql-service-type (service-type (name 'mysql) (extensions (list (service-extension account-service-type (const %mysql-accounts)) (service-extension shepherd-root-service-type mysql-shepherd-services))) (default-value (mysql-configuration)) (description "Run the MySQL or MariaDB database server, @command{mysqld}."))) (define-deprecated (mysql-service #:key (config (mysql-configuration))) mysql-service-type (service mysql-service-type config)) ;;; ;;; Redis ;;; (define-record-type* redis-configuration make-redis-configuration redis-configuration? (redis redis-configuration-redis ;file-like (default redis)) (bind redis-configuration-bind (default "127.0.0.1")) (port redis-configuration-port (default 6379)) (working-directory redis-configuration-working-directory (default "/var/lib/redis")) (config-file redis-configuration-config-file (default #f))) (define (default-redis.conf bind port working-directory) (mixed-text-file "redis.conf" "bind " bind "\n" "port " (number->string port) "\n" "dir " working-directory "\n" "daemonize no\n")) (define %redis-accounts (list (user-group (name "redis") (system? #t)) (user-account (name "redis") (group "redis") (system? #t) (comment "Redis server user") (home-directory "/var/empty") (shell (file-append shadow "/sbin/nologin"))))) (define redis-activation (match-lambda (($ redis bind port working-directory config-file) #~(begin (use-modules (guix build utils) (ice-9 match)) (let ((user (getpwnam "redis"))) (mkdir-p #$working-directory) (chown #$working-directory (passwd:uid user) (passwd:gid user))))))) (define redis-shepherd-service (match-lambda (($ redis bind port working-directory config-file) (let ((config-file (or config-file (default-redis.conf bind port working-directory)))) (list (shepherd-service (provision '(redis)) (documentation "Run the Redis daemon.") (requirement '(user-processes syslogd)) (start #~(make-forkexec-constructor '(#$(file-append redis "/bin/redis-server") #$config-file) #:user "redis" #:group "redis")) (stop #~(make-kill-destructor)))))))) (define redis-service-type (service-type (name 'redis) (extensions (list (service-extension shepherd-root-service-type redis-shepherd-service) (service-extension activation-service-type redis-activation) (service-extension account-service-type (const %redis-accounts)))) (default-value (redis-configuration)) (description "Run Redis, a caching key/value store.")))