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services: Add dhcpd-service-type and <dhcpd-configuration>.

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* doc/guix.texi (Networking Services): Document it.
* gnu/services/networking.scm (dhcpd-service-type): Add it.
(dhcpd-configuration, dhcpd-configuration?): Add it.
(dhcpd-configuration-package): Add it.
(dhcpd-configuration-config-file): Add it.
(dhcpd-configuration-version): Add it.
(dhcpd-configuration-run-directory): Add it.
(dhcpd-configuration-lease-file): Add it.
(dhcpd-configuration-pid-file): Add it.
(dhcpd-configuration-interfaces): Add it.
* gnu/tests/networking.scm (minimal-dhcpd-v4-config-file)
(dhcpd-v4-configuration, %dhcpd-os, run-dhcpd-test, %test-dhcpd): New
variables.
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Chris Marusich 2017-12-16 00:52:42 -08:00
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commit f1104d9009
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3 changed files with 219 additions and 1 deletions
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45
doc/guix.texi
View file

@ -10694,6 +10694,51 @@ Return a service that runs @var{dhcp}, a Dynamic Host Configuration
Protocol (DHCP) client, on all the non-loopback network interfaces.
@end deffn
@deffn {Scheme Procedure} dhcpd-service-type
This type defines a service that runs a DHCP daemon. To create a
service of this type, you must supply a @code{<dhcpd-configuration>}.
For example:
@example
(service dhcpd-service-type
(dhcpd-configuration
(config-file (local-file "my-dhcpd.conf"))
(interfaces '("enp0s25"))))
@end example
@end deffn
@deftp {Data Type} dhcpd-configuration
@table @asis
@item @code{package} (default: @code{isc-dhcp})
The package that provides the DHCP daemon. This package is expected to
provide the daemon at @file{sbin/dhcpd} relative to its output
directory. The default package is the
@uref{http://www.isc.org/products/DHCP, ISC's DHCP server}.
@item @code{config-file} (default: @code{#f})
The configuration file to use. This is required. It will be passed to
@code{dhcpd} via its @code{-cf} option. This may be any ``file-like''
object (@pxref{G-Expressions, file-like objects}). See @code{man
dhcpd.conf} for details on the configuration file syntax.
@item @code{version} (default: @code{"4"})
The DHCP version to use. The ISC DHCP server supports the values ``4'',
``6'', and ``4o6''. These correspond to the @code{dhcpd} program
options @code{-4}, @code{-6}, and @code{-4o6}. See @code{man dhcpd} for
details.
@item @code{run-directory} (default: @code{"/run/dhcpd"})
The run directory to use. At service activation time, this directory
will be created if it does not exist.
@item @code{pid-file} (default: @code{"/run/dhcpd/dhcpd.pid"})
The PID file to use. This corresponds to the @code{-pf} option of
@code{dhcpd}. See @code{man dhcpd} for details.
@item @code{interfaces} (default: @code{'()})
The names of the network interfaces on which dhcpd should listen for
broadcasts. If this list is not empty, then its elements (which must be
strings) will be appended to the @code{dhcpd} invocation when starting
the daemon. It may not be necessary to explicitly specify any
interfaces here; see @code{man dhcpd} for details.
@end table
@end deftp
@defvr {Scheme Variable} static-networking-service-type
This is the type for statically-configured network interfaces.
@c TODO Document <static-networking> data structures.

78
gnu/services/networking.scm
View file

@ -57,6 +57,18 @@ (define-module (gnu services networking)
static-networking-service
static-networking-service-type
dhcp-client-service
dhcpd-service-type
dhcpd-configuration
dhcpd-configuration?
dhcpd-configuration-package
dhcpd-configuration-config-file
dhcpd-configuration-version
dhcpd-configuration-run-directory
dhcpd-configuration-lease-file
dhcpd-configuration-pid-file
dhcpd-configuration-interfaces
%ntp-servers
ntp-configuration
@ -341,6 +353,72 @@ (define* (dhcp-client-service #:key (dhcp isc-dhcp))
Protocol (DHCP) client, on all the non-loopback network interfaces."
(service dhcp-client-service-type dhcp))
(define-record-type* <dhcpd-configuration>
dhcpd-configuration make-dhcpd-configuration
dhcpd-configuration?
(package dhcpd-configuration-package ;<package>
(default isc-dhcp))
(config-file dhcpd-configuration-config-file ;file-like
(default #f))
(version dhcpd-configuration-version ;"4", "6", or "4o6"
(default "6"))
(run-directory dhcpd-configuration-run-directory
(default "/run/dhcpd"))
(lease-file dhcpd-configuration-lease-file
(default "/var/db/dhcpd.leases"))
(pid-file dhcpd-configuration-pid-file
(default "/run/dhcpd/dhcpd.pid"))
;; list of strings, e.g. (list "enp0s25")
(interfaces dhcpd-configuration-interfaces
(default '())))
(define dhcpd-shepherd-service
(match-lambda
(($ <dhcpd-configuration> package config-file version run-directory
lease-file pid-file interfaces)
(unless config-file
(error "Must supply a config-file"))
(list (shepherd-service
;; Allow users to easily run multiple versions simultaneously.
(provision (list (string->symbol
(string-append "dhcpv" version "-daemon"))))
(documentation (string-append "Run the DHCPv" version " daemon"))
(requirement '(networking))
(start #~(make-forkexec-constructor
'(#$(file-append package "/sbin/dhcpd")
#$(string-append "-" version)
"-lf" #$lease-file
"-pf" #$pid-file
"-cf" #$config-file
#$@interfaces)
#:pid-file #$pid-file))
(stop #~(make-kill-destructor)))))))
(define dhcpd-activation
(match-lambda
(($ <dhcpd-configuration> package config-file version run-directory
lease-file pid-file interfaces)
(with-imported-modules '((guix build utils))
#~(begin
(unless (file-exists? #$run-directory)
(mkdir #$run-directory))
;; According to the DHCP manual (man dhcpd.leases), the lease
;; database must be present for dhcpd to start successfully.
(unless (file-exists? #$lease-file)
(with-output-to-file #$lease-file
(lambda _ (display ""))))
;; Validate the config.
(invoke
#$(file-append package "/sbin/dhcpd") "-t" "-cf"
#$config-file))))))
(define dhcpd-service-type
(service-type
(name 'dhcpd)
(extensions
(list (service-extension shepherd-root-service-type dhcpd-shepherd-service)
(service-extension activation-service-type dhcpd-activation)))))
(define %ntp-servers
;; Default set of NTP servers. These URLs are managed by the NTP Pool project.
;; Within Guix, Leo Famulari <leo@famulari.name> is the administrative contact

97
gnu/tests/networking.scm
View file

@ -29,7 +29,7 @@ (define-module (gnu tests networking)
#:use-module (gnu packages bash)
#:use-module (gnu packages networking)
#:use-module (gnu services shepherd)
#:export (%test-inetd %test-openvswitch))
#:export (%test-inetd %test-openvswitch %test-dhcpd))
(define %inetd-os
;; Operating system with 2 inetd services.
@ -243,3 +243,98 @@ (define %test-openvswitch
(name "openvswitch")
(description "Test a running OpenvSwitch configuration.")
(value (run-openvswitch-test))))
;;;
;;; DHCP Daemon
;;;
(define minimal-dhcpd-v4-config-file
(plain-file "dhcpd.conf"
"\
default-lease-time 600;
max-lease-time 7200;
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.100 192.168.1.200;
option routers 192.168.1.1;
option domain-name-servers 192.168.1.2, 192.168.1.3;
option domain-name \"dummy.domain.name.abc123xyz\";
}
"))
(define dhcpd-v4-configuration
(dhcpd-configuration
(config-file minimal-dhcpd-v4-config-file)
(version "4")
(interfaces '("eth0"))))
(define %dhcpd-os
(simple-operating-system
(static-networking-service "eth0" "192.168.1.4"
#:netmask "255.255.255.0"
#:gateway "192.168.1.1"
#:name-servers '("192.168.1.2" "192.168.1.3"))
(service dhcpd-service-type dhcpd-v4-configuration)))
(define (run-dhcpd-test)
(define os
(marionette-operating-system %dhcpd-os
#:imported-modules '((gnu services herd))))
(define test
(with-imported-modules '((gnu build marionette))
#~(begin
(use-modules (gnu build marionette)
(ice-9 popen)
(ice-9 rdelim)
(srfi srfi-64))
(define marionette
(make-marionette (list #$(virtual-machine os))))
(mkdir #$output)
(chdir #$output)
(test-begin "dhcpd")
(test-assert "pid file exists"
(marionette-eval
'(file-exists?
#$(dhcpd-configuration-pid-file dhcpd-v4-configuration))
marionette))
(test-assert "lease file exists"
(marionette-eval
'(file-exists?
#$(dhcpd-configuration-lease-file dhcpd-v4-configuration))
marionette))
(test-assert "run directory exists"
(marionette-eval
'(file-exists?
#$(dhcpd-configuration-run-directory dhcpd-v4-configuration))
marionette))
(test-assert "dhcpd is alive"
(marionette-eval
'(begin
(use-modules (gnu services herd)
(srfi srfi-1))
(live-service-running
(find (lambda (live)
(memq 'dhcpv4-daemon
(live-service-provision live)))
(current-services))))
marionette))
(test-end)
(exit (= (test-runner-fail-count (test-runner-current)) 0)))))
(gexp->derivation "dhcpd-test" test))
(define %test-dhcpd
(system-test
(name "dhcpd")
(description "Test a running DHCP daemon configuration.")
(value (run-dhcpd-test))))