diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | doc.am | 3 | ||||
| -rw-r--r-- | doc/guix.texi | 27 | ||||
| -rw-r--r-- | doc/images/dmd-graph.dot | 75 | ||||
| -rw-r--r-- | guix/scripts/system.scm | 34 |
5 files changed, 133 insertions, 7 deletions
diff --git a/.gitignore b/.gitignore index e3f2ac2c21..6e8bfaca95 100644 --- a/.gitignore +++ b/.gitignore @@ -132,3 +132,4 @@ GTAGS /doc/images/service-graph.png /doc/images/service-graph.eps /doc/images/service-graph.pdf +/doc/images/dmd-graph.png @@ -23,7 +23,8 @@ DOT_FILES = \ doc/images/bootstrap-graph.dot \ doc/images/coreutils-graph.dot \ doc/images/coreutils-bag-graph.dot \ - doc/images/service-graph.dot + doc/images/service-graph.dot \ + doc/images/dmd-graph.dot DOT_VECTOR_GRAPHICS = \ $(DOT_FILES:%.dot=%.eps) \ diff --git a/doc/guix.texi b/doc/guix.texi index 0e0e507714..fd0adfd203 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -7004,6 +7004,12 @@ $ guix system extension-graph @var{file} | dot -Tpdf > services.pdf produces a PDF file showing the extension relations among services. +@anchor{system-dmd-graph} +@item dmd-graph +Emit in Dot/Graphviz format to standard output the @dfn{dependency +graph} of dmd services of the operating system defined in @var{file}. +@xref{dmd Services}, for more information and for an example graph. + @end table @@ -7332,10 +7338,23 @@ setuid-root programs on the system (@pxref{Setuid Programs}). The @code{(gnu services dmd)} provides a way to define services managed by GNU@tie{}dmd, which is GuixSD initialization system---the first process that is started when the system boots, aka. PID@tie{}1 -(@pxref{Introduction,,, dmd, GNU dmd Manual}). The -@var{%dmd-root-service} represents PID@tie{}1, of type -@var{dmd-root-service-type}; it can be extended by passing it lists of -@code{<dmd-service>} objects. +(@pxref{Introduction,,, dmd, GNU dmd Manual}). + +Services in dmd can depend on each other. For instance, the SSH daemon +may need to be started after the syslog daemon has been started, which +in turn can only happen once all the file systems have been mounted. +The simple operating system defined earlier (@pxref{Using the +Configuration System}) results in a service graph like this: + +@image{images/dmd-graph,,5in,Typical dmd service graph.} + +You can actually generate such a graph for any operating system +definition using the @command{guix system dmd-graph} command +(@pxref{system-dmd-graph, @command{guix system dmd-graph}}). + +The @var{%dmd-root-service} is a service object representing PID@tie{}1, +of type @var{dmd-root-service-type}; it can be extended by passing it +lists of @code{<dmd-service>} objects. @deftp {Data Type} dmd-service The data type representing a service managed by dmd. diff --git a/doc/images/dmd-graph.dot b/doc/images/dmd-graph.dot new file mode 100644 index 0000000000..220a2afca1 --- /dev/null +++ b/doc/images/dmd-graph.dot @@ -0,0 +1,75 @@ +digraph "Guix dmd-service" { + "user-file-systems" [label = "user-file-systems", shape = box, fontname = Helvetica]; + "user-processes" -> "user-file-systems" [color = red]; + "user-processes" [label = "user-processes", shape = box, fontname = Helvetica]; + "nscd" -> "user-processes" [color = red]; + "guix-daemon" -> "user-processes" [color = red]; + "syslogd" -> "user-processes" [color = red]; + "term-tty6" -> "user-processes" [color = red]; + "term-tty5" -> "user-processes" [color = red]; + "term-tty4" -> "user-processes" [color = red]; + "term-tty3" -> "user-processes" [color = red]; + "term-tty2" -> "user-processes" [color = red]; + "term-tty1" -> "user-processes" [color = red]; + "networking" -> "user-processes" [color = red]; + "nscd" [label = "nscd", shape = box, fontname = Helvetica]; + "guix-daemon" [label = "guix-daemon", shape = box, fontname = Helvetica]; + "syslogd" [label = "syslogd", shape = box, fontname = Helvetica]; + "ssh-daemon" -> "syslogd" [color = red]; + "ssh-daemon" [label = "ssh-daemon", shape = box, fontname = Helvetica]; + "term-tty6" [label = "term-tty6", shape = box, fontname = Helvetica]; + "console-font-tty6" -> "term-tty6" [color = red]; + "console-font-tty6" [label = "console-font-tty6", shape = box, fontname = Helvetica]; + "term-tty5" [label = "term-tty5", shape = box, fontname = Helvetica]; + "console-font-tty5" -> "term-tty5" [color = red]; + "console-font-tty5" [label = "console-font-tty5", shape = box, fontname = Helvetica]; + "term-tty4" [label = "term-tty4", shape = box, fontname = Helvetica]; + "console-font-tty4" -> "term-tty4" [color = red]; + "console-font-tty4" [label = "console-font-tty4", shape = box, fontname = Helvetica]; + "term-tty3" [label = "term-tty3", shape = box, fontname = Helvetica]; + "console-font-tty3" -> "term-tty3" [color = red]; + "console-font-tty3" [label = "console-font-tty3", shape = box, fontname = Helvetica]; + "term-tty2" [label = "term-tty2", shape = box, fontname = Helvetica]; + "console-font-tty2" -> "term-tty2" [color = red]; + "console-font-tty2" [label = "console-font-tty2", shape = box, fontname = Helvetica]; + "term-tty1" [label = "term-tty1", shape = box, fontname = Helvetica]; + "console-font-tty1" -> "term-tty1" [color = red]; + "console-font-tty1" [label = "console-font-tty1", shape = box, fontname = Helvetica]; + "networking" [label = "networking", shape = box, fontname = Helvetica]; + "ssh-daemon" -> "networking" [color = red]; + "root-file-system" [label = "root-file-system", shape = box, fontname = Helvetica]; + "file-system-/run/user" -> "root-file-system" [color = red]; + "file-system-/run/systemd" -> "root-file-system" [color = red]; + "file-system-/gnu/store" -> "root-file-system" [color = red]; + "file-system-/dev/shm" -> "root-file-system" [color = red]; + "file-system-/dev/pts" -> "root-file-system" [color = red]; + "user-processes" -> "root-file-system" [color = red]; + "udev" -> "root-file-system" [color = red]; + "file-system-/run/user" [label = "file-system-/run/user", shape = box, fontname = Helvetica]; + "user-processes" -> "file-system-/run/user" [color = red]; + "file-system-/run/systemd" [label = "file-system-/run/systemd", shape = box, fontname = Helvetica]; + "user-processes" -> "file-system-/run/systemd" [color = red]; + "file-system-/gnu/store" [label = "file-system-/gnu/store", shape = box, fontname = Helvetica]; + "user-processes" -> "file-system-/gnu/store" [color = red]; + "file-system-/dev/shm" [label = "file-system-/dev/shm", shape = box, fontname = Helvetica]; + "user-processes" -> "file-system-/dev/shm" [color = red]; + "file-system-/dev/pts" [label = "file-system-/dev/pts", shape = box, fontname = Helvetica]; + "user-processes" -> "file-system-/dev/pts" [color = red]; + "udev" [label = "udev", shape = box, fontname = Helvetica]; + "term-tty6" -> "udev" [color = red]; + "term-tty5" -> "udev" [color = red]; + "term-tty4" -> "udev" [color = red]; + "term-tty3" -> "udev" [color = red]; + "term-tty2" -> "udev" [color = red]; + "term-tty1" -> "udev" [color = red]; + "networking" -> "udev" [color = red]; + "host-name" [label = "host-name", shape = box, fontname = Helvetica]; + "term-tty6" -> "host-name" [color = red]; + "term-tty5" -> "host-name" [color = red]; + "term-tty4" -> "host-name" [color = red]; + "term-tty3" -> "host-name" [color = red]; + "term-tty2" -> "host-name" [color = red]; + "term-tty1" -> "host-name" [color = red]; + "loopback" [label = "loopback", shape = box, fontname = Helvetica]; + +} diff --git a/guix/scripts/system.scm b/guix/scripts/system.scm index 9160969b95..b5da57a9ce 100644 --- a/guix/scripts/system.scm +++ b/guix/scripts/system.scm @@ -36,6 +36,7 @@ #:use-module (gnu system vm) #:use-module (gnu system grub) #:use-module (gnu services) + #:use-module (gnu services dmd) #:use-module (gnu packages grub) #:use-module (srfi srfi-1) #:use-module (srfi srfi-19) @@ -282,7 +283,7 @@ it atomically, and then run OS's activation script." ;;; -;;; Graph. +;;; Graphs. ;;; (define (service-node-label service) @@ -311,6 +312,18 @@ list of services." (label service-node-label) (edges (lift1 (service-back-edges services) %store-monad)))) +(define (dmd-service-node-label service) + "Return a label for a node representing a <dmd-service>." + (string-join (map symbol->string (dmd-service-provision service)))) + +(define (dmd-service-node-type services) + "Return a node type for SERVICES, a list of <dmd-service>." + (node-type + (name "dmd-service") + (description "the dependency graph of dmd services") + (identifier (lift1 dmd-service-node-label %store-monad)) + (label dmd-service-node-label) + (edges (lift1 (dmd-service-back-edges services) %store-monad)))) ;;; @@ -410,6 +423,19 @@ building anything." #:node-type (service-node-type services) #:reverse-edges? #t))) +(define (export-dmd-graph os port) + "Export the graph of dmd services of OS to PORT." + (let* ((services (operating-system-services os)) + (pid1 (fold-services services + #:target-type dmd-root-service-type)) + (dmds (service-parameters pid1)) ;the list of <dmd-service> + (sinks (filter (lambda (service) + (null? (dmd-service-requirement service))) + dmds))) + (export-graph sinks (current-output-port) + #:node-type (dmd-service-node-type dmds) + #:reverse-edges? #t))) + ;;; ;;; Options. @@ -435,6 +461,8 @@ Build the operating system declared in FILE according to ACTION.\n")) init initialize a root file system to run GNU\n")) (display (_ "\ extension-graph emit the service extension graph in Dot format\n")) + (display (_ "\ + dmd-graph emit the graph of dmd services in Dot format\n")) (show-build-options-help) (display (_ " @@ -543,7 +571,7 @@ Build the operating system declared in FILE according to ACTION.\n")) (let ((action (string->symbol arg))) (case action ((build vm vm-image disk-image reconfigure init - extension-graph) + extension-graph dmd-graph) (alist-cons 'action action result)) (else (leave (_ "~a: unknown action~%") action)))))) @@ -611,6 +639,8 @@ Build the operating system declared in FILE according to ACTION.\n")) (case action ((extension-graph) (export-extension-graph os (current-output-port))) + ((dmd-graph) + (export-dmd-graph os (current-output-port))) (else (perform-action action os #:dry-run? dry? |