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gnu: services: admin: Add tailon.

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* gnu/services/admin.scm
  (<tailon-configuration>, <tailon-configuration-file>): New record types.
  (tailon-configuration-files-string, tailon-shepherd-service): New
  procedures.
  (%tailon-accounts, tailon-service-type: New variables.
* doc/guix.texi (Monitoring Services: Document the Tailon service.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add gnu/tests/admin.scm.
* gnu/tests/admin.scm: New file.
This commit is contained in:
Christopher Baines 2017-06-24 14:19:46 +01:00
parent b5244fcb49
commit 730ed6ec8b
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4 changed files with 369 additions and 1 deletions
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151
gnu/services/admin.scm
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@ -20,14 +20,19 @@
(define-module (gnu services admin)
#:use-module (gnu packages admin)
#:use-module (gnu packages base)
#:use-module (gnu packages logging)
#:use-module (gnu services)
#:use-module (gnu services mcron)
#:use-module (gnu services shepherd)
#:use-module (gnu services web)
#:use-module (gnu system shadow)
#:use-module (guix gexp)
#:use-module (guix store)
#:use-module (guix packages)
#:use-module (guix records)
#:use-module (srfi srfi-1)
#:use-module (ice-9 vlist)
#:use-module (ice-9 match)
#:export (%default-rotations
%rotated-files
@ -41,7 +46,27 @@
rottlog-configuration
rottlog-configuration?
rottlog-service
rottlog-service-type))
rottlog-service-type
<tailon-configuration-file>
tailon-configuration-file
tailon-configuration-file?
tailon-configuration-file-files
tailon-configuration-file-bind
tailon-configuration-file-relative-root
tailon-configuration-file-allow-transfers?
tailon-configuration-file-follow-names?
tailon-configuration-file-tail-lines
tailon-configuration-file-allowed-commands
tailon-configuration-file-debug?
<tailon-configuration>
tailon-configuration
tailon-configuration?
tailon-configuration-config-file
tailon-configuration-package
tailon-service-type))
;;; Commentary:
;;;
@ -172,4 +197,128 @@ for ROTATION."
rotations)))))
(default-value (rottlog-configuration))))
;;;
;;; Tailon
;;;
(define-record-type* <tailon-configuration-file>
tailon-configuration-file make-tailon-configuration-file
tailon-configuration-file?
(files tailon-configuration-file-files
(default '("/var/log")))
(bind tailon-configuration-file-bind
(default "localhost:8080"))
(relative-root tailon-configuration-file-relative-root
(default #f))
(allow-transfers? tailon-configuration-file-allow-transfers?
(default #t))
(follow-names? tailon-configuration-file-follow-names?
(default #t))
(tail-lines tailon-configuration-file-tail-lines
(default 200))
(allowed-commands tailon-configuration-file-allowed-commands
(default '("tail" "grep" "awk")))
(debug? tailon-configuration-file-debug?
(default #f)))
(define (tailon-configuration-files-string files)
(string-append
"\n"
(string-join
(map
(lambda (x)
(string-append
" - "
(cond
((string? x)
(simple-format #f "'~A'" x))
((list? x)
(string-join
(cons (simple-format #f "'~A':" (car x))
(map
(lambda (x) (simple-format #f " - '~A'" x))
(cdr x)))
"\n"))
(else (error x)))))
files)
"\n")))
(define-gexp-compiler (tailon-configuration-file-compiler
(file <tailon-configuration-file>) system target)
(match file
(($ <tailon-configuration-file> files bind relative-root
allow-transfers? follow-names?
tail-lines allowed-commands debug?)
(text-file
"tailon-config.yaml"
(string-concatenate
(filter-map
(match-lambda
((key . #f) #f)
((key . value) (string-append key ": " value "\n")))
`(("files" . ,(tailon-configuration-files-string files))
("bind" . ,bind)
("relative-root" . ,relative-root)
("allow-transfers" . ,(if allow-transfers? "true" "false"))
("follow-names" . ,(if follow-names? "true" "false"))
("tail-lines" . ,(number->string tail-lines))
("commands" . ,(string-append "["
(string-join allowed-commands ", ")
"]"))
,@(if debug? '(("debug" . "true")) '()))))))))
(define-record-type* <tailon-configuration>
tailon-configuration make-tailon-configuration
tailon-configuration?
(config-file tailon-configuration-config-file
(default (tailon-configuration-file)))
(package tailon-configuration-package
(default tailon)))
(define tailon-shepherd-service
(match-lambda
(($ <tailon-configuration> config-file package)
(list (shepherd-service
(provision '(tailon))
(documentation "Run the tailon daemon.")
(start #~(make-forkexec-constructor
`(,(string-append #$package "/bin/tailon")
"-c" ,#$config-file)
#:user "tailon"
#:group "tailon"))
(stop #~(make-kill-destructor)))))))
(define %tailon-accounts
(list (user-group (name "tailon") (system? #t))
(user-account
(name "tailon")
(group "tailon")
(system? #t)
(comment "tailon")
(home-directory "/var/empty")
(shell (file-append shadow "/sbin/nologin")))))
(define tailon-service-type
(service-type
(name 'tailon)
(extensions
(list (service-extension shepherd-root-service-type
tailon-shepherd-service)
(service-extension account-service-type
(const %tailon-accounts))))
(compose concatenate)
(extend (lambda (parameter files)
(tailon-configuration
(inherit parameter)
(config-file
(let ((old-config-file
(tailon-configuration-config-file parameter)))
(tailon-configuration-file
(inherit old-config-file)
(files (append (tailon-configuration-file-files old-config-file)
files))))))))
(default-value (tailon-configuration))))
;;; admin.scm ends here