services: postgresql: Add log directory support.

* gnu/services/databases.scm (postgresql-configuration-log-directory): New
procedure.
(<postgresql-configuration>)[log-directory]: New field.
(postgresql-activation): Create the log directory.
(postgresql-shepherd-service): Honor it.
* gnu/tests/databases.scm (%postgresql-log-directory): New variable.
(log-file): New test case.
* doc/guix.texi (Database Services): Document it.
This commit is contained in:
Mathieu Othacehe 2021-01-18 10:52:25 +01:00
parent 6c0679215f
commit fe4b882350
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GPG Key ID: 8354763531769CA6
3 changed files with 53 additions and 8 deletions

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@ -19344,6 +19344,11 @@ The configuration file to use when running PostgreSQL@. The default
behaviour uses the postgresql-config-file record with the default values
for the fields.
@item @code{log-directory} (default: @code{"/var/log/postgresql"})
The directory where @command{pg_ctl} output will be written in a file
named @code{"pg_ctl.log"}. This file can be useful to debug PostgreSQL
configuration errors for instance.
@item @code{data-directory} (default: @code{"/var/lib/postgresql/data"})
Directory in which to store the data.

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@ -52,6 +52,7 @@
postgresql-configuration-port
postgresql-configuration-locale
postgresql-configuration-file
postgresql-configuration-log-directory
postgresql-configuration-data-directory
postgresql-service
@ -164,6 +165,8 @@ host all all ::1/128 md5"))
(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
@ -200,15 +203,18 @@ host all all ::1/128 md5"))
(define postgresql-activation
(match-lambda
(($ <postgresql-configuration> postgresql port locale config-file data-directory
extension-packages)
(($ <postgresql-configuration> 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 #$(final-postgresql postgresql extension-packages)
"/bin/initdb"))
(initdb (string-append
#$(final-postgresql postgresql
extension-packages)
"/bin/initdb"))
(initdb-args
(append
(if #$locale
@ -225,6 +231,11 @@ host all all ::1/128 md5"))
(mkdir-p socket-directory)
(chown socket-directory (passwd:uid user) (passwd:gid user))))
;; Create the log directory.
(when (string? #$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)
@ -247,8 +258,9 @@ host all all ::1/128 md5"))
(define postgresql-shepherd-service
(match-lambda
(($ <postgresql-configuration> postgresql port locale config-file data-directory
extension-packages)
(($ <postgresql-configuration> 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.
@ -260,13 +272,21 @@ host all all ::1/128 md5"))
(match (command-line)
((_ mode)
(let ((user (getpwnam "postgres"))
(pg_ctl #$(file-append (final-postgresql postgresql extension-packages)
(pg_ctl #$(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" #$data-directory "-o" options
(execl pg_ctl pg_ctl "-D" #$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

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@ -214,6 +214,9 @@
;;; The PostgreSQL service.
;;;
(define %postgresql-log-directory
"/var/log/postgresql")
(define %postgresql-os
(simple-operating-system
(service postgresql-service-type
@ -262,6 +265,23 @@
(start-service 'postgres))
marionette))
(test-assert "log-file"
(marionette-eval
'(begin
(use-modules (ice-9 ftw)
(ice-9 match))
(current-output-port
(open-file "/dev/console" "w0"))
(let ((server-log-file
(string-append #$%postgresql-log-directory
"/pg_ctl.log")))
(and (file-exists? server-log-file)
(display
(call-with-input-file server-log-file
get-string-all)))
#t))
marionette))
(test-end)
(exit (= (test-runner-fail-count (test-runner-current)) 0)))))