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|
;;; Guix Build Coordinator
;;;
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of the guix-build-coordinator.
;;;
;;; The Guix Build Coordinator 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.
;;;
;;; The Guix Build Coordinator 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 the guix-data-service. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (guix-build-coordinator agent)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (ice-9 match)
#:use-module (ice-9 futures)
#:use-module (ice-9 atomic)
#:use-module (ice-9 threads)
#:use-module (ice-9 exceptions)
#:use-module (rnrs bytevectors)
#:use-module (web http)
#:use-module (guix store)
#:use-module (guix derivations)
#:use-module (guix base32)
#:use-module (guix-build-coordinator utils)
#:use-module (guix-build-coordinator agent-messaging http)
#:export (run-agent))
(define (run-agent uuid coordinator-uri password
systems
max-parallel-builds
derivation-substitute-urls
non-derivation-substitute-urls)
(define (fetch-jobs current-count max-count)
(let ((received-builds
(fetch-builds-for-agent coordinator-uri uuid password
systems
max-count)))
(simple-format #t "have ~A builds, max ~A builds, received ~A\n"
current-count max-count (- (length received-builds)
current-count))
received-builds))
(define (process-job build)
(let ((build-id (assoc-ref build "uuid"))
(derivation-name (assoc-ref build "derivation-name")))
(simple-format #t "~A: setting up to build: ~A\n"
build-id derivation-name)
(with-store store
(let ((pre-build-status (pre-build-process
store
derivation-substitute-urls
non-derivation-substitute-urls
derivation-name)))
(if (eq? (assq-ref pre-build-status 'result) 'success)
(begin
(simple-format #t "~A: setup successful, building: ~A\n"
build-id derivation-name)
(report-build-start coordinator-uri uuid password
build-id)
(let* ((result (perform-build store derivation-name))
;; TODO Check this handles timezones right
(end-time (localtime (current-time) "UTC")))
(agent-submit-log-file uuid coordinator-uri password
build-id derivation-name)
((if result
post-build-success
post-build-failure)
uuid coordinator-uri password
build-id
derivation-name
end-time)))
(begin
(simple-format #t "~A: failure: ~A\n" build-id pre-build-status)
(report-setup-failure coordinator-uri uuid password
build-id
pre-build-status)))))))
(let-values (((process-job-with-queue count-jobs)
(create-work-queue max-parallel-builds
process-job)))
(let ((details (submit-status coordinator-uri uuid password 'idle)))
(let* ((builds (vector->list (assoc-ref details "builds")))
(initial-build-ids (map (lambda (build)
(assoc-ref build "uuid"))
builds)))
(for-each
(lambda (job-args)
(process-job-with-queue job-args))
builds)
(let loop ((build-ids initial-build-ids))
(let ((job-count (count-jobs)))
(if (< job-count max-parallel-builds)
(let* ((fetched-builds
(fetch-jobs job-count max-parallel-builds))
(new-builds
(remove (lambda (build)
(member (assoc-ref build "uuid")
build-ids))
fetched-builds)))
(for-each
(lambda (job-args)
(process-job-with-queue job-args))
new-builds)
(when (null? new-builds)
(sleep 30))
(loop (map (lambda (build)
(assoc-ref build "uuid"))
fetched-builds)))
(begin
(sleep 3)
(loop build-ids)))))))))
(define (agent-submit-log-file uuid coordinator-uri password
build-id derivation-name)
(retry-on-error
(lambda ()
(let ((log-file (derivation-log-file derivation-name)))
(unless log-file
(raise-exception
(make-exception-with-message
(simple-format #f "log file missing for ~A (~A)"
derivation-name build-id))))
(simple-format #t "~A: uploading log file ~A\n"
build-id log-file)
(submit-log-file
coordinator-uri uuid password
build-id
log-file)))
#:times 6
#:delay 30))
(define (pre-build-process store
derivation-substitute-urls
non-derivation-substitute-urls
derivation-name)
(define (find-missing-inputs derivation inputs)
(let* ((output-paths
(append-map derivation-input-output-paths inputs))
(missing-paths
(remove (lambda (path)
(valid-path? store path))
output-paths))
(path-substitutes
(begin
(when non-derivation-substitute-urls
(set-build-options store #:substitute-urls
non-derivation-substitute-urls))
(unless non-derivation-substitute-urls
(simple-format
#t
"warning: unable to query substitute servers without caching\n"))
(map (lambda (file)
(and
(and (list? non-derivation-substitute-urls)
(has-substiutes-no-cache? non-derivation-substitute-urls
file))
(if (has-substitutes? store file)
#t
(begin
(simple-format
#t "warning: a substitute should be available for ~A, but the daemon claims it's not\n"
file)
#f))))
missing-paths))))
(if (null? missing-paths)
'()
(if (member #f path-substitutes)
(fold (lambda (file substitute-available? result)
(if substitute-available?
result
(cons file result)))
'()
missing-paths
path-substitutes)
(begin
(retry-on-error
(lambda ()
(with-timeout (* 1000 60 10) ; 10 minutes
(raise-exception
(make-exception-with-message "timeout fetching inputs"))
(begin
;; Download the substitutes
(when non-derivation-substitute-urls
(set-build-options store
#:substitute-urls
non-derivation-substitute-urls))
(build-things store missing-paths))))
#:times 6
#:delay 60)
;; Double check everything is actually present.
(let ((missing-files (remove (lambda (path)
(valid-path? store path))
output-paths)))
(if (null? missing-files)
'()
(begin
(simple-format
(current-error-port)
"warning: failed to fetch substitutes for: ~A\n"
missing-files)
(let ((unavailable-outputs
(delete-duplicates
(append-map
(lambda (missing-output)
(find-missing-substitutes-for-output
store
non-derivation-substitute-urls
missing-output))
missing-files))))
(simple-format
(current-error-port)
"warning: the following outputs are missing:\n~A\n"
(string-join
(map (lambda (output)
(string-append
" - " output))
unavailable-outputs)
"\n"))
unavailable-outputs)))))))))
(define (delete-outputs derivation)
(let* ((outputs (derivation-outputs derivation))
(output-file-names
(map derivation-output-path (map cdr outputs))))
(if (any file-exists? output-file-names)
(catch
#t
(lambda ()
;; There can be issues deleting links when collecting garbage
;; from multiple threads
(monitor
(with-store store
(delete-paths store output-file-names)))
#t)
(lambda (key args)
(simple-format (current-error-port)
"error: delete-outputs: ~A ~A\n"
key args)
#f))
#t)))
(let ((derivation
(if (valid-path? store derivation-name)
(read-derivation-from-file derivation-name)
(and
(with-exception-handler
(lambda (exn)
(simple-format
(current-error-port)
"error: exception when reading/fetching derivation: ~A\n"
exn)
#f)
(lambda ()
(retry-on-error
(lambda ()
(substitute-derivation derivation-name
#:substitute-urls
derivation-substitute-urls))
#:times 12
#:delay 20)
#t)
#:unwind? #t)
(read-derivation-from-file derivation-name)))))
(if derivation
(match (delete-outputs derivation)
(#t
(let ((missing-inputs
(find-missing-inputs derivation (derivation-inputs derivation))))
(if (null? missing-inputs)
'((result . success))
`((result . failure)
(failure_reason . missing_inputs)
(missing_inputs . ,(list->vector missing-inputs))))))
(failure
'((result . failure)
(failure_reason . could_not_delete_outputs))))
'((result . failure)
(failure_reason . error_fetching_derivation)))))
(define (perform-build store derivation-name)
(set-build-options store
#:use-substitutes? #f)
(parameterize ((current-build-output-port (%make-void-port "w")))
(catch #t
(lambda ()
(build-things store (list derivation-name))
#t)
(lambda (key . args)
(simple-format (current-error-port)
"error: build: ~A ~A\n"
key args)
#f))))
(define (post-build-failure uuid coordinator-uri password
build-id derivation end-time)
(simple-format #t "build ~A failed, reporting to coordinator\n"
build-id)
(with-exception-handler
(lambda (exn)
(unless (agent-error-from-coordinator? exn)
(raise-exception exn))
(let ((details
(agent-error-from-coordinator-details exn)))
(if (string? details)
(cond
((string=? details "build_already_processed")
(simple-format
#t "warning: coordinator indicates this build is already marked as processed\n")
#t)
(else
(raise-exception
(make-exception
(make-exception-with-message
"unrecognised error from coordinator")
(make-exception-with-irritants
details)))))
(raise-exception
(make-exception
(make-exception-with-message
"unrecognised error from coordinator")
(make-exception-with-irritants
details))))))
(lambda ()
(submit-build-result coordinator-uri uuid password
build-id
`((result . failure)
(end_time . ,(strftime "%F %T" end-time)))))
#:unwind? #t))
(define (post-build-success uuid coordinator-uri password
build-id derivation end-time)
(define output-details
(map
(match-lambda
((output-name . output)
(let ((path-info (with-store store
(query-path-info
store
(derivation-output-path output)))))
`((name . ,output-name)
(hash . ,(bytevector->nix-base32-string
(path-info-hash path-info)))
(size . ,(path-info-nar-size path-info))
(references . ,(list->vector
(map basename
(path-info-references path-info))))))))
(derivation-outputs (read-derivation-from-file derivation))))
(define (attempt-submit-build-result)
(with-exception-handler
(lambda (exn)
(unless (agent-error-from-coordinator? exn)
(raise-exception exn))
(let ((details
(agent-error-from-coordinator-details exn)))
(if (string? details)
(cond
((string=? details "build_already_processed")
(simple-format
#t "warning: coordinator indicates this build is already marked as processed\n")
#t)
((string=? details "missing_build_log_file")
;; Retry submitting the log file
(agent-submit-log-file uuid coordinator-uri password
build-id derivation)
(attempt-submit-build-result))
(else
(raise-exception
(make-exception
(make-exception-with-message
"unrecognised error from coordinator")
(make-exception-with-irritants
details)))))
(or
(and=> (assoc-ref details "missing_output")
(lambda (missing-output-name)
(let ((missing-output
(any (match-lambda
((name . output)
(if (string=? name missing-output-name)
output
#f)))
(derivation-outputs
(read-derivation-from-file derivation)))))
(unless missing-output
(raise-exception
(make-exception
(make-exception-with-message
"unknown missing output")
(make-exception-with-irritants
missing-output-name))))
(submit-one-output missing-output-name
missing-output))
(attempt-submit-build-result)))
(raise-exception
(make-exception
(make-exception-with-message
"unrecognised error from coordinator")
(make-exception-with-irritants
details)))))))
(lambda ()
(submit-build-result
coordinator-uri uuid password build-id
`((result . success)
(end_time . ,(strftime "%F %T" end-time))
(outputs . ,(list->vector output-details)))))
#:unwind? #t))
(define (submit-one-output output-name output)
(simple-format #t "submitting output ~A\n"
(derivation-output-path output))
(submit-output coordinator-uri uuid password
build-id output-name
(derivation-output-path output)))
(simple-format #t "build ~A successful, reporting to coordinator\n"
build-id)
(for-each (match-lambda
((output-name . output)
(submit-one-output output-name output)))
(derivation-outputs (read-derivation-from-file derivation)))
(simple-format #t "finished submitting outputs, reporting result\n")
(attempt-submit-build-result))
|