forked from vieter-v/vieter
feat(cron): improve sleep calculation; prevent invalid rescheduling of
finished buildsmain
parent
a1c308f29d
commit
caee56efd4
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@ -2,6 +2,7 @@ module daemon
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import time
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import sync.stdatomic
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import rand
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const build_empty = 0
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@ -9,21 +10,23 @@ const build_running = 1
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const build_done = 2
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// reschedule_builds looks for any builds with status code 2 & re-adds them to
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// the queue.
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fn (mut d Daemon) reschedule_builds() ? {
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// clean_finished_builds removes finished builds from the build slots & returns
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// them.
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fn (mut d Daemon) clean_finished_builds() ?[]ScheduledBuild {
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mut out := []ScheduledBuild{}
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for i in 0 .. d.atomics.len {
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if stdatomic.load_u64(&d.atomics[i]) == daemon.build_done {
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stdatomic.store_u64(&d.atomics[i], daemon.build_empty)
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sb := d.builds[i]
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out << d.builds[i]
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}
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}
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d.schedule_build(sb.repo_id, sb.repo) ?
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}
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}
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return out
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}
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// update_builds starts as many builds as possible.
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fn (mut d Daemon) update_builds() ? {
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fn (mut d Daemon) start_new_builds() ? {
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now := time.now()
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for d.queue.len() > 0 {
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@ -31,8 +34,8 @@ fn (mut d Daemon) update_builds() ? {
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sb := d.queue.pop() ?
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// If this build couldn't be scheduled, no more will be possible.
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// TODO a build that couldn't be scheduled should be re-added to the queue.
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if !d.start_build(sb) {
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d.queue.insert(sb)
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break
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}
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} else {
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@ -60,7 +63,20 @@ fn (mut d Daemon) start_build(sb ScheduledBuild) bool {
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// run_build actually starts the build process for a given repo.
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fn (mut d Daemon) run_build(build_index int, sb ScheduledBuild) ? {
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d.linfo('build $sb.repo.url')
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time.sleep(10 * time.second)
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time.sleep(rand.int_in_range(1, 6) ? * time.second)
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stdatomic.store_u64(&d.atomics[build_index], daemon.build_done)
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}
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// current_build_count returns how many builds are currently running.
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fn (mut d Daemon) current_build_count() int {
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mut res := 0
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for i in 0 .. d.atomics.len {
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if stdatomic.load_u64(&d.atomics[i]) == daemon.build_running {
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res += 1
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}
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}
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return res
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}
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@ -6,7 +6,6 @@ import log
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import datatypes { MinHeap }
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import cron.expression { CronExpression, parse_expression }
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import math
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import arrays
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struct ScheduledBuild {
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pub:
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@ -64,40 +63,51 @@ pub fn init_daemon(logger log.Log, address string, api_key string, base_image st
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// periodically refreshes the list of repositories to ensure we stay in sync.
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pub fn (mut d Daemon) run() ? {
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for {
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finished_builds := d.clean_finished_builds() ?
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// Update the API's contents if needed & renew the queue
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if time.now() >= d.api_update_timestamp {
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d.renew_repos() ?
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d.renew_queue() ?
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}
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// Cleans up finished builds, opening up spots for new builds
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d.reschedule_builds() ?
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// The finished builds should only be rescheduled if the API contents
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// haven't been renewed.
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else {
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for sb in finished_builds {
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d.schedule_build(sb.repo_id, sb.repo) ?
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}
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}
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// TODO rebuild builder image when needed
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// Schedules new builds when possible
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d.update_builds() ?
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d.start_new_builds() ?
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// If there are builds currently running, the daemon should refresh
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// every second to clean up any finished builds & start new ones.
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mut delay := time.Duration(1 * time.second)
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// Sleep either until we have to refresh the repos or when the next
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// build has to start, with a minimum of 1 second.
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if d.current_build_count() == 0 {
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now := time.now()
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mut delay := d.api_update_timestamp - now
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delay = d.api_update_timestamp - now
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if d.queue.len() > 0 {
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time_until_next_job := d.queue.peek() ?.timestamp - now
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delay = math.min(delay, time_until_next_job)
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}
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d.ldebug('Sleeping for ${delay}...')
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// TODO if there are builds active, the sleep time should be much lower to clean up the builds when they're finished.
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}
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// We sleep for at least one second. This is to prevent the program
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// from looping agressively when a cronjob can be scheduled, but
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// there's no spots free for it to be started.
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time.sleep(math.max(delay, 1 * time.second))
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delay = math.max(delay, 1 * time.second)
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d.ldebug('Sleeping for ${delay}...')
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time.sleep(delay)
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}
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}
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@ -114,6 +114,8 @@ pub fn (ce &CronExpression) next(ref time.Time) ?time.Time {
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})
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}
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// next_from_now returns the result of ce.next(ref) where ref is the result of
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// time.now().
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pub fn (ce &CronExpression) next_from_now() ?time.Time {
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return ce.next(time.now())
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}
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@ -10,4 +10,5 @@ default_arch = "x86_64"
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address = "http://localhost:8000"
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global_schedule = '* *'
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api_update_frequency = 2
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max_concurrent_builds = 3
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