chore: Fix changes from buffer provisioner logs (#4924)

Comments from #4918 were missed because of auto-merge.

provisionerd/provisionerd.go

@@ -50,7 +50,7 @@ type Options struct {
 
 	ForceCancelInterval time.Duration
 	UpdateInterval      time.Duration
-	LogDebounceInterval time.Duration
+	LogBufferInterval   time.Duration
 	PollInterval        time.Duration
 	Provisioners        Provisioners
 	WorkDirectory       string
@@ -67,8 +67,8 @@ func New(clientDialer Dialer, opts *Options) *Server {
 	if opts.ForceCancelInterval == 0 {
 		opts.ForceCancelInterval = time.Minute
 	}
-	if opts.LogDebounceInterval == 0 {
-		opts.LogDebounceInterval = 50 * time.Millisecond
+	if opts.LogBufferInterval == 0 {
+		opts.LogBufferInterval = 50 * time.Millisecond
 	}
 	if opts.Filesystem == nil {
 		opts.Filesystem = afero.NewOsFs()
@@ -329,7 +329,7 @@ func (p *Server) acquireJob(ctx context.Context) {
 		provisioner,
 		p.opts.UpdateInterval,
 		p.opts.ForceCancelInterval,
-		p.opts.LogDebounceInterval,
+		p.opts.LogBufferInterval,
 		p.tracer,
 		p.opts.Metrics.Runner,
 	)

provisionerd/runner/runner.go

@@ -898,6 +898,9 @@ func (r *Runner) startTrace(ctx context.Context, name string, opts ...trace.Span
 	))...)
 }
 
+// queueLog adds a log to the buffer and debounces a timer
+// if one exists to flush the logs. It stores a maximum of
+// 100 log lines before flushing as a safe-guard mechanism.
 func (r *Runner) queueLog(ctx context.Context, log *proto.Log) {
 	r.mutex.Lock()
 	defer r.mutex.Unlock()
@@ -906,6 +909,7 @@ func (r *Runner) queueLog(ctx context.Context, log *proto.Log) {
 		r.flushLogsTimer.Reset(r.logBufferInterval)
 		return
 	}
+	// This can be configurable if there are a ton of logs.
 	if len(r.queuedLogs) > 100 {
 		// Flushing logs requires a lock, so this can happen async.
 		go r.flushQueuedLogs(ctx)
@@ -921,7 +925,7 @@ func (r *Runner) flushQueuedLogs(ctx context.Context) {
 	if r.flushLogsTimer != nil {
 		r.flushLogsTimer.Stop()
 	}
-	logs := r.queuedLogs[:]
+	logs := r.queuedLogs
 	r.queuedLogs = make([]*proto.Log, 0)
 	r.mutex.Unlock()
 	_, err := r.update(ctx, &proto.UpdateJobRequest{