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gnu: mysql: Support custom data dir.
* gnu/services/databases.scm (mysql-configuration): Add datadir property. * gnu/services/databases.scm (mysql-configuration-file): Replace hard coded data dir with property from config. * gnu/services/databases.scm (%mysql-activation): Remove activation, it runs before PID 1. The data dir may reside on a file system not mounted at this time. * gnu/services/databases.scm (mysql-install-shepherd-service): Create service which replaces the activation. Provide mysql-install. * gnu/services/databases.scm (mysql-shepherd-service): Move invocation of mysqld to mysql-start program-file, because the invocation gotten more complex. Require mysql-install. * gnu/services/databases.scm (mysql-start): Invoke mysqld only if a lock file appears. * gnu/services/databases.scm (mysql-shepherd-services): Prepend the install service before the normal service. * gnu/services/databases.scm (mysql-upgrade-wrapper): Increase timeout to 20s to let the mysql install procedure finish. Signed-off-by: Marius Bakke <marius@gnu.org>
This commit is contained in:
Ellen Papsch
Marius Bakke
parent
96efebed24
commit
c7b266fdf2
1 changed files with 121 additions and 70 deletions
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@ -8,6 +8,7 @@
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;;; Copyright © 2019 Robert Vollmert <rob@vllmrt.net>
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;;; Copyright © 2020 Marius Bakke <marius@gnu.org>
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;;; Copyright © 2021 David Larsson <david.larsson@selfhosted.xyz>
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;;; Copyright © 2021 Aljosha Papsch <ep@stern-data.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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@ -532,6 +533,7 @@ (define-record-type* <mysql-configuration>
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(bind-address mysql-configuration-bind-address (default "127.0.0.1"))
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(port mysql-configuration-port (default 3306))
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(socket mysql-configuration-socket (default "/run/mysqld/mysqld.sock"))
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(datadir mysql-configuration-datadir (default "/var/lib/mysql"))
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(extra-content mysql-configuration-extra-content (default ""))
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(extra-environment mysql-configuration-extra-environment (default #~'()))
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(auto-upgrade? mysql-configuration-auto-upgrade? (default #t)))
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@ -549,19 +551,69 @@ (define %mysql-accounts
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(define mysql-configuration-file
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(match-lambda
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(($ <mysql-configuration> mysql bind-address port socket extra-content)
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(($ <mysql-configuration> mysql bind-address port socket datadir extra-content)
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(mixed-text-file "my.cnf" "[mysqld]
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datadir=/var/lib/mysql
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datadir=" datadir "
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socket=" socket "
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bind-address=" bind-address "
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port=" (number->string port) "
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" extra-content "
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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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(define (mysql-with-install-lock)
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"Return a loop function which evals thunk when the install is locked."
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#~(lambda (thunk)
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(let loop ((i 0))
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(let ((timeout 10)
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(lock-stat (stat "/var/lib/mysql.lock" #f)))
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(if (and (not (eq? lock-stat #f))
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(eq? (stat:type lock-stat) 'regular))
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(apply thunk '())
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(if (< i timeout)
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(begin
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(sleep 1)
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(loop (+ 1 i)))
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(throw 'timeout-error
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"MySQL installation not locked in time!")))))))
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(define (mysql-start config)
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"Start mysqld if install lock file appears"
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(program-file
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"mysql-start"
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(let ((mysql (mysql-configuration-mysql config))
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(my.cnf (mysql-configuration-file config)))
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#~(let ((mysqld (string-append #$mysql "/bin/mysqld"))
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(with-lock #$(mysql-with-install-lock)))
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(with-lock (lambda ()
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(execl mysqld mysqld
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(string-append "--defaults-file=" #$my.cnf))))))))
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(define (mysql-shepherd-service config)
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(list (shepherd-service
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(provision '(mysql))
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(requirement '(mysql-install))
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(documentation "Run the MySQL server.")
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(start (let ((mysql (mysql-configuration-mysql config))
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(extra-env (mysql-configuration-extra-environment config))
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(my.cnf (mysql-configuration-file config)))
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#~(make-forkexec-constructor
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(list #$(mysql-start config))
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#:user "mysql" #:group "mysql"
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#:log-file "/var/log/mysqld.log"
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#:environment-variables #$extra-env)))
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(stop #~(make-kill-destructor)))))
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(define (mysql-install config)
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"Install MySQL system database and secure the installation."
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(let ((mysql (mysql-configuration-mysql config))
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(my.cnf (mysql-configuration-file config))
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(datadir (mysql-configuration-datadir config))
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(extra-env (mysql-configuration-extra-environment config)))
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(program-file
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"mysql-install"
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(with-imported-modules (source-module-closure
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'((ice-9 popen)
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(guix build utils)))
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#~(begin
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(use-modules (ice-9 popen)
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(guix build utils))
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@ -569,7 +621,7 @@ (define (%mysql-activation config)
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(user (getpwnam "mysql"))
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(uid (passwd:uid user))
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(gid (passwd:gid user))
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(datadir "/var/lib/mysql")
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(datadir #$datadir)
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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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@ -611,22 +663,20 @@ (define (%mysql-activation config)
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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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(close-pipe p))))
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(call-with-output-file "/var/lib/mysql.lock"
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(lambda (p)
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(write #t p)))))))))
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(define (mysql-shepherd-service config)
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(define (mysql-install-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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(extra-env (mysql-configuration-extra-environment 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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#:log-file "/var/log/mysqld.log"
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#:environment-variables #$extra-env)))
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(stop #~(make-kill-destructor)))))
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(provision '(mysql-install))
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(requirement '(file-systems))
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(one-shot? #t)
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(documentation "Install MySQL system database and secure installation.")
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(start #~(make-forkexec-constructor
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(list #$(mysql-install config))
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#:log-file "/var/log/mysqld-install.log")))))
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(define (mysql-upgrade-wrapper mysql socket-file)
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;; The MySQL socket and PID file may appear before the server is ready to
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@ -636,7 +686,7 @@ (define (mysql-upgrade-wrapper mysql socket-file)
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"mysql-upgrade-wrapper"
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#~(begin
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(let ((mysql-upgrade #$(file-append mysql "/bin/mysql_upgrade"))
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(timeout 10))
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(timeout 20))
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(begin
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(let loop ((i 0))
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(catch 'system-error
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@ -668,11 +718,14 @@ (define (mysql-upgrade-shepherd-service config)
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(list #$(mysql-upgrade-wrapper mysql socket))
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#:user "mysql" #:group "mysql"))))))
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(define (mysql-shepherd-services config)
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(let ((min-services (append (mysql-install-shepherd-service config)
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(mysql-shepherd-service config))))
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(if (mysql-configuration-auto-upgrade? config)
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(append (mysql-shepherd-service config)
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(append min-services
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(mysql-upgrade-shepherd-service config))
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(mysql-shepherd-service config)))
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min-services)))
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(define mysql-service-type
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(service-type
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@ -680,8 +733,6 @@ (define mysql-service-type
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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-services)))
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(default-value (mysql-configuration))
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