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authorRicardo Wurmus <rekado@elephly.net>2017-12-13 23:42:40 +0100
committerRicardo Wurmus <rekado@elephly.net>2017-12-16 21:51:33 +0100
commitdafc3dafeada11e4df043bf751a611b1ac8fc22a (patch)
tree57338ba0841860fe51802693f0306d363fb2ea52
parentca6182a1be5ccc76043b4138e504ee6ae143edae (diff)
downloadguix-dafc3dafeada11e4df043bf751a611b1ac8fc22a.tar
guix-dafc3dafeada11e4df043bf751a611b1ac8fc22a.tar.gz
guix: offload: Add "status" sub-command.
* guix/scripts/offload.scm (check-machine-status): New procedure. (guix-offload): Call it when the argument is "status". * doc/guix.texi (Daemon Offload Setup): Document it.
-rw-r--r--doc/guix.texi9
-rw-r--r--guix/scripts/offload.scm39
2 files changed, 48 insertions, 0 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 64f73b38a4..cb6e6b1c6b 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -1066,6 +1066,15 @@ regular expression like this:
# guix offload test machines.scm '\.gnu\.org$'
@end example
+@cindex offload status
+To display the current load of all build hosts, run this command on the
+main node:
+
+@example
+# guix offload status
+@end example
+
+
@node Invoking guix-daemon
@section Invoking @command{guix-daemon}
diff --git a/guix/scripts/offload.scm b/guix/scripts/offload.scm
index ebd0bf783d..7e114fa2c9 100644
--- a/guix/scripts/offload.scm
+++ b/guix/scripts/offload.scm
@@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -629,6 +630,32 @@ machine."
(for-each assert-node-can-import nodes names sockets)
(for-each assert-node-can-export nodes names sockets))))
+(define (check-machine-status machine-file pred)
+ "Print the load of each machine matching PRED in MACHINE-FILE."
+ (define (build-machine=? m1 m2)
+ (and (string=? (build-machine-name m1) (build-machine-name m2))
+ (= (build-machine-port m1) (build-machine-port m2))))
+
+ ;; A given build machine may appear several times (e.g., once for
+ ;; "x86_64-linux" and a second time for "i686-linux"); test them only once.
+ (let ((machines (filter pred
+ (delete-duplicates (build-machines machine-file)
+ build-machine=?))))
+ (info (G_ "getting status of ~a build machines defined in '~a'...~%")
+ (length machines) machine-file)
+ (for-each (lambda (machine)
+ (let* ((node (make-node (open-ssh-session machine)))
+ (uts (node-eval node '(uname))))
+ (format #t "~a~% kernel: ~a ~a~% architecture: ~a~%\
+ host name: ~a~% normalized load: ~a~%"
+ (build-machine-name machine)
+ (utsname:sysname uts) (utsname:release uts)
+ (utsname:machine uts)
+ (utsname:nodename uts)
+ (parameterize ((current-error-port (%make-void-port "rw+")))
+ (machine-load machine)))))
+ machines)))
+
;;;
;;; Entry point.
@@ -691,6 +718,18 @@ machine."
(() (values %machine-file (const #t)))
(x (leave (G_ "wrong number of arguments~%"))))))
(check-machine-availability (or file %machine-file) pred))))
+ (("status" rest ...)
+ (with-error-handling
+ (let-values (((file pred)
+ (match rest
+ ((file regexp)
+ (values file
+ (compose (cut string-match regexp <>)
+ build-machine-name)))
+ ((file) (values file (const #t)))
+ (() (values %machine-file (const #t)))
+ (x (leave (G_ "wrong number of arguments~%"))))))
+ (check-machine-status (or file %machine-file) pred))))
(("--version")
(show-version-and-exit "guix offload"))
(("--help")