Alza soft capacity fase A e aggiunge quiet hours CPX notturne.

Home a 4 e cloud a 6 con MAX_NODES=12 (~76 soft); di notte (02–07 Europe/Rome) niente scale-out/warm-spare e sweeper che chiude i CPX idle.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/streams/autoscaler.rb

@@ -71,6 +71,10 @@ module Streams
         estimated_monthly_eur(overflow_count) <= monthly_budget_eur
       end
 
+      def quiet_hours?
+        QuietHours.active?
+      end
+
       def reconcile!(provisioner: nil)
         return Result.new(skipped: true, actions: [], metrics: metrics) unless enabled?
 
@@ -106,7 +110,8 @@ module Streams
           allow_cloud: allow_cloud?,
           estimated_monthly_eur: estimated_monthly_eur(overflow.size),
           monthly_budget_eur: monthly_budget_eur,
-          within_budget: within_budget?(overflow.size)
+          within_budget: within_budget?(overflow.size),
+          quiet_hours: quiet_hours?
         }
       end
 
@@ -201,6 +206,7 @@ module Streams
     end
 
     def warm_spare_desired?(m)
+      return false if self.class.quiet_hours?
       return false if self.class.warm_spare_min <= 0
 
       need_capacity?(m) || overflow_in_use?
@@ -211,6 +217,7 @@ module Streams
     end
 
     def can_provision?(m)
+      return false if self.class.quiet_hours?
       return false if m[:overflow_nodes] >= self.class.max_overflow_nodes
       return false unless self.class.within_budget?(m[:overflow_nodes] + 1)
       return false if self.class.kind == "cloud" && !self.class.allow_cloud?
@@ -249,6 +256,9 @@ module Streams
     end
 
     def idle_long_enough?(node)
+      # Di notte chiudi subito i nodi idle (niente attesa IDLE_MINUTES).
+      return true if self.class.quiet_hours?
+
       idle_since(node) <= self.class.idle_minutes.minutes.ago
     end
 
@@ -258,6 +268,7 @@ module Streams
     end
 
     def keep_as_warm_spare?(node)
+      return false if self.class.quiet_hours?
       return false unless warm_spare_desired?(self.class.metrics)
 
       spares = StreamNode.ready.where.not(slug: NodeRegistry::HOME_SLUG).select { |n| n.active_publishers.zero? }

backend/app/services/streams/night_cloud_sweeper.rb

@@ -0,0 +1,83 @@
+# frozen_string_literal: true
+
+module Streams
+  # Durante quiet hours chiude CPX cloud idle; se hanno sessioni attive solo alert Ops.
+  class NightCloudSweeper
+    Result = Struct.new(:skipped, :actions, :error, keyword_init: true)
+
+    class << self
+      def enabled?
+        ENV.fetch("STREAM_NIGHT_SWEEP_ENABLED", "1") == "1"
+      end
+
+      def sweep!(provisioner: nil)
+        new(provisioner: provisioner).sweep!
+      end
+    end
+
+    def initialize(provisioner: nil)
+      @provisioner = provisioner || NodeProvisioner.new
+    end
+
+    def sweep!
+      unless self.class.enabled?
+        return Result.new(skipped: true, actions: [], error: "disabled")
+      end
+      unless QuietHours.active?
+        return Result.new(skipped: true, actions: [], error: "outside_quiet_hours")
+      end
+
+      actions = []
+      cloud_nodes.find_each do |node|
+        if node.occupying_sessions.exists?
+          alert_active_night_node!(node)
+          actions << :"alert_active_#{node.slug}"
+          next
+        end
+
+        close_idle_node!(node)
+        actions << :"decommission_#{node.slug}"
+      rescue NodeProvisioner::BusyError, NodeProvisioner::Error => e
+        Rails.logger.warn("[Streams::NightCloudSweeper] #{node.slug}: #{e.message}")
+        actions << :"error_#{node.slug}"
+      end
+
+      Rails.logger.info("[Streams::NightCloudSweeper] actions=#{actions.inspect}")
+      Result.new(skipped: false, actions: actions)
+    end
+
+    private
+
+    def cloud_nodes
+      StreamNode.where(role: "cloud").where(status: %w[ready draining provisioning])
+    end
+
+    def alert_active_night_node!(node)
+      Ops::IncidentRecorder.record(
+        {
+          kind: "stream_overflow",
+          severity: "warning",
+          title: "CPX attivo di notte — verificare evento",
+          message: "Nodo #{node.slug} ha #{node.active_publishers} sessione/i in quiet hours (#{QuietHours.range_config} #{QuietHours.time_zone_name})",
+          metadata: {
+            "slug" => node.slug,
+            "session_ids" => node.occupying_sessions.pluck(:id),
+            "quiet_hours" => QuietHours.range_config
+          },
+          fingerprint: "stream_overflow:night_active:#{node.slug}"
+        }
+      )
+    end
+
+    def close_idle_node!(node)
+      @provisioner.drain!(node) unless node.status == "draining"
+      node.reload
+      raise NodeProvisioner::BusyError, "sessioni ancora attive" if node.occupying_sessions.exists?
+
+      slug = node.slug
+      @provisioner.decommission!(node)
+      Rails.logger.warn("[Streams::NightCloudSweeper] decommissioned idle cloud node #{slug} during quiet hours")
+      Ops::IncidentRecorder.resolve(fingerprint: "stream_overflow:night_active:#{slug}")
+    end
+  end
+end

backend/app/services/streams/quiet_hours.rb

@@ -0,0 +1,59 @@
+# frozen_string_literal: true
+
+module Streams
+  # Finestra notturna (default 02:00–07:00 Europe/Rome) in cui non devono restare CPX idle.
+  module QuietHours
+    DEFAULT_RANGE = "02:00-07:00"
+    DEFAULT_TZ = "Europe/Rome"
+
+    module_function
+
+    def range_config
+      ENV.fetch("STREAM_AUTOSCALE_QUIET_HOURS", DEFAULT_RANGE).to_s.strip
+    end
+
+    def time_zone_name
+      ENV.fetch("STREAM_AUTOSCALE_QUIET_TZ", DEFAULT_TZ)
+    end
+
+    def configured?
+      range_config.present? && range_config != "off" && range_config != "0"
+    end
+
+    def active?(now: Time.current)
+      return false unless configured?
+
+      zone = ActiveSupport::TimeZone[time_zone_name] || Time.find_zone!(time_zone_name)
+      local = now.in_time_zone(zone)
+      start_min, end_min = parse_range(range_config)
+      return false if start_min.nil? || end_min.nil?
+
+      current = local.hour * 60 + local.min
+      if start_min <= end_min
+        current >= start_min && current < end_min
+      else
+        # es. 22:00-06:00
+        current >= start_min || current < end_min
+      end
+    rescue ArgumentError => e
+      Rails.logger.warn("[Streams::QuietHours] invalid config: #{e.message}")
+      false
+    end
+
+    def parse_range(raw)
+      start_s, end_s = raw.split("-", 2).map { |p| p.to_s.strip }
+      return [nil, nil] if start_s.blank? || end_s.blank?
+
+      [parse_hhmm(start_s), parse_hhmm(end_s)]
+    end
+
+    def parse_hhmm(value)
+      h, m = value.split(":", 2)
+      hours = Integer(h)
+      mins = Integer(m || 0)
+      raise ArgumentError, "ora fuori range: #{value}" unless hours.between?(0, 23) && mins.between?(0, 59)
+
+      hours * 60 + mins
+    end
+  end
+end