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Diffstat (limited to 'gnu/services/base.scm')
| -rw-r--r-- | gnu/services/base.scm | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/gnu/services/base.scm b/gnu/services/base.scm new file mode 100644 index 0000000000..d6c1707c6a --- /dev/null +++ b/gnu/services/base.scm @@ -0,0 +1,191 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org> +;;; +;;; 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 <http://www.gnu.org/licenses/>. + +(define-module (gnu services base) + #:use-module (gnu services) + #:use-module (gnu system shadow) ; 'user-account', etc. + #:use-module (gnu system linux) ; 'pam-service', etc. + #:use-module (gnu packages admin) + #:use-module ((gnu packages base) + #:select (glibc-final)) + #:use-module (gnu packages package-management) + #:use-module (guix monads) + #:use-module (srfi srfi-1) + #:use-module (srfi srfi-26) + #:use-module (ice-9 format) + #:export (host-name-service + mingetty-service + nscd-service + syslog-service + guix-service + %base-services)) + +;;; Commentary: +;;; +;;; Base system services---i.e., services that 99% of the users will want to +;;; use. +;;; +;;; Code: + +(define (host-name-service name) + "Return a service that sets the host name to NAME." + (with-monad %store-monad + (return (service + (documentation "Initialize the machine's host name.") + (provision '(host-name)) + (start `(lambda _ + (sethostname ,name))) + (respawn? #f))))) + +(define* (mingetty-service tty + #:key + (motd (text-file "motd" "Welcome.\n")) + (allow-empty-passwords? #t)) + "Return a service to run mingetty on TTY." + (mlet %store-monad ((mingetty-bin (package-file mingetty "sbin/mingetty")) + (motd motd)) + (return + (service + (documentation (string-append "Run mingetty on " tty ".")) + (provision (list (symbol-append 'term- (string->symbol tty)))) + + ;; Since the login prompt shows the host name, wait for the 'host-name' + ;; service to be done. + (requirement '(host-name)) + + (start `(make-forkexec-constructor ,mingetty-bin "--noclear" ,tty)) + (stop `(make-kill-destructor)) + (inputs `(("mingetty" ,mingetty) + ("motd" ,motd))) + + (pam-services + ;; Let 'login' be known to PAM. All the mingetty services will have + ;; that PAM service, but that's fine because they're all identical and + ;; duplicates are removed. + (list (unix-pam-service "login" + #:allow-empty-passwords? allow-empty-passwords? + #:motd motd))))))) + +(define* (nscd-service #:key (glibc glibc-final)) + "Return a service that runs libc's name service cache daemon (nscd)." + (mlet %store-monad ((nscd (package-file glibc "sbin/nscd"))) + (return (service + (documentation "Run libc's name service cache daemon (nscd).") + (provision '(nscd)) + (start `(make-forkexec-constructor ,nscd "-f" "/dev/null" + "--foreground")) + (stop `(make-kill-destructor)) + + (respawn? #f) + (inputs `(("glibc" ,glibc))))))) + +(define (syslog-service) + "Return a service that runs 'syslogd' with reasonable default settings." + + ;; Snippet adapted from the GNU inetutils manual. + (define contents " + # Log all kernel messages, authentication messages of + # level notice or higher and anything of level err or + # higher to the console. + # Don't log private authentication messages! + *.err;kern.*;auth.notice;authpriv.none /dev/console + + # Log anything (except mail) of level info or higher. + # Don't log private authentication messages! + *.info;mail.none;authpriv.none /var/log/messages + + # Same, in a different place. + *.info;mail.none;authpriv.none /dev/tty12 + + # The authpriv file has restricted access. + authpriv.* /var/log/secure + + # Log all the mail messages in one place. + mail.* /var/log/maillog +") + + (mlet %store-monad + ((syslog.conf (text-file "syslog.conf" contents)) + (syslogd (package-file inetutils "libexec/syslogd"))) + (return + (service + (documentation "Run the syslog daemon (syslogd).") + (provision '(syslogd)) + (start `(make-forkexec-constructor ,syslogd "--no-detach" + "--rcfile" ,syslog.conf)) + (stop `(make-kill-destructor)) + (inputs `(("inetutils" ,inetutils) + ("syslog.conf" ,syslog.conf))))))) + +(define* (guix-build-accounts count #:key + (first-uid 30001) + (gid 30000) + (shadow shadow)) + "Return a list of COUNT user accounts for Guix build users, with UIDs +starting at FIRST-UID, and under GID." + (with-monad %store-monad + (return (unfold (cut > <> count) + (lambda (n) + (user-account + (name (format #f "guixbuilder~2,'0d" n)) + (password "!") + (uid (+ first-uid n -1)) + (gid gid) + (comment (format #f "Guix Build User ~2d" n)) + (home-directory "/var/empty") + (shell (package-file shadow "sbin/nologin")) + (inputs `(("shadow" ,shadow))))) + 1+ + 1)))) + +(define* (guix-service #:key (guix guix) (builder-group "guixbuild") + (build-user-gid 30000) (build-accounts 10)) + "Return a service that runs the build daemon from GUIX, and has +BUILD-ACCOUNTS user accounts available under BUILD-USER-GID." + (mlet %store-monad ((daemon (package-file guix "bin/guix-daemon")) + (accounts (guix-build-accounts build-accounts + #:gid build-user-gid))) + (return (service + (provision '(guix-daemon)) + (start `(make-forkexec-constructor ,daemon + "--build-users-group" + ,builder-group)) + (stop `(make-kill-destructor)) + (inputs `(("guix" ,guix))) + (user-accounts accounts) + (user-groups (list (user-group + (name builder-group) + (id build-user-gid) + (members (map user-account-name + user-accounts))))))))) + +(define %base-services + ;; Convenience variable holding the basic services. + (let ((motd (text-file "motd" " +This is the GNU operating system, welcome!\n\n"))) + (list (mingetty-service "tty1" #:motd motd) + (mingetty-service "tty2" #:motd motd) + (mingetty-service "tty3" #:motd motd) + (mingetty-service "tty4" #:motd motd) + (mingetty-service "tty5" #:motd motd) + (mingetty-service "tty6" #:motd motd) + (syslog-service) + (guix-service) + (nscd-service)))) + +;;; base.scm ends here |