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fix: move pubsub publishing out of database transactions to avoid conn exhaustion #17648

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Merged
merged 7 commits into from
May 5, 2025
Merged

fix: move pubsub publishing out of database transactions to avoid conn exhaustion #17648

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ba2f90a
fix: move pubsub publishing out of database transactions to avoid con…
dannykopping May 1, 2025
74f5dd7
chore: commentary
dannykopping May 2, 2025
f6909ff
chore: polish
dannykopping May 2, 2025
1c84fac
chore: augment reconciler test to validate that broken publish does n…
dannykopping May 2, 2025
5117a5e
Merge branch 'main' of github.com:/coder/coder into dk/notify-outside-tx
dannykopping May 2, 2025
42cc3f5
chore: make lint
dannykopping May 2, 2025
9ddad0b
fix: only break pubsub after dbgen setup
dannykopping May 5, 2025
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chore: polish 
Signed-off-by: Danny Kopping <dannykopping@gmail.com>
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@dannykopping
dannykopping committed May 2, 2025
commit f6909ff17e7ac41db67a065f88fbb72163d0c7c6
16 changes: 8 additions & 8 deletions enterprise/coderd/prebuilds/reconcile.go
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Original file line number Diff line number Diff line change
Expand Up @@ -44,7 +44,7 @@ type StoreReconciler struct {
running atomic.Bool
stopped atomic.Bool
done chan struct{}
provisionNotifyCh chan *database.ProvisionerJob
provisionNotifyCh chan database.ProvisionerJob
}

var _ prebuilds.ReconciliationOrchestrator = &StoreReconciler{}
Expand All @@ -64,7 +64,7 @@ func NewStoreReconciler(store database.Store,
clock: clock,
registerer: registerer,
done: make(chan struct{}, 1),
provisionNotifyCh: make(chan *database.ProvisionerJob, 100),
provisionNotifyCh: make(chan database.ProvisionerJob, 10),
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Thumb-suck; I want to protect against temporary network/database blips but also don't want to accumulate too many messages.

}

reconciler.metrics = NewMetricsCollector(store, logger, reconciler)
Expand Down Expand Up @@ -117,11 +117,7 @@ func (c *StoreReconciler) Run(ctx context.Context) {
case <-ctx.Done():
return
case job := <-c.provisionNotifyCh:
if job == nil {
continue
}

err := provisionerjobs.PostJob(c.pubsub, *job)
err := provisionerjobs.PostJob(c.pubsub, job)
if err != nil {
c.logger.Error(ctx, "failed to post provisioner job to pubsub", slog.Error(err))
}
Expand Down Expand Up @@ -600,9 +596,13 @@ func (c *StoreReconciler) provision(
return xerrors.Errorf("provision workspace: %w", err)
}

if provisionerJob == nil {
return nil
}

// Publish provisioner job event outside of transaction.
select {
case c.provisionNotifyCh <- provisionerJob:
case c.provisionNotifyCh <- *provisionerJob:
default: // channel full, drop the message; provisioner will pick this job up later with its periodic check, though.
c.logger.Warn(ctx, "provisioner job notification queue full, dropping",
slog.F("job_id", provisionerJob.ID), slog.F("prebuild_id", prebuildID.String()))
Expand Down
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