feat: add fleet autoscaling baseline

deploy/k8s/base/fleet-autoscaler.yaml

@@ -0,0 +1,17 @@
+apiVersion: autoscaling.agones.dev/v1
+kind: FleetAutoscaler
+metadata:
+  name: cosmic-clash-game
+  namespace: cosmic-clash
+  labels:
+    app.kubernetes.io/name: game-fleet-autoscaler
+spec:
+  fleetName: cosmic-clash-game
+  policy:
+    type: Buffer
+    buffer:
+      # Ready floor is deliberately independent of Allocated capacity. Agones
+      # scales Allocated servers down to zero while preserving this buffer.
+      minReady: 2
+      maxReady: 6
+      bufferSize: 2

deploy/k8s/base/kustomization.yaml

@@ -7,3 +7,4 @@ resources:
   - network-policies.yaml
   - control-plane-deployment.yaml
   - fleet.yaml
+  - fleet-autoscaler.yaml

multiplayer-next.md

@@ -127,8 +127,11 @@ product policy are in [`docs/MATCHMAKING.md`](docs/MATCHMAKING.md).
   Agones integration remains.
 - [ ] Deliver/verify the signed roster after allocation and expose client
   tickets only after backend `assignment_ready`.
-- [ ] Keep >=2 Ready processes across >=2 on-demand nodes/failure domains per
+- [ ] **IN PROGRESS:** Keep >=2 Ready processes across >=2 on-demand
-  queue-enabled region; only Allocated count may fall to zero.
+  nodes/failure domains per queue-enabled region; only Allocated count may
+  fall to zero. A provider-neutral Agones FleetAutoscaler now encodes a
+  two-process Ready buffer and six-process warm cap; regional node pools,
+  pre-pull rollout and measured N+1 capacity remain.
 - [ ] Spread on-demand capacity across zones with N+1 headroom; do not place
   live matches on interruptible nodes.
 - [ ] Benchmark native x86_64 boot, p99 CPU/RSS/network and tick health; set

multiplayer-todo.md

@@ -1214,7 +1214,7 @@ the local/CI/community transport, not a silent production fallback.
 | 8.29 `[D:8.26,8.27]` | **IN PROGRESS.** Supervisor discovers and validates the Agones endpoint, propagates the actual dynamic `--port`, and exports `SDR_LISTEN_PORT`/`SDR_IP` only for Hosted-SDR while preserving an isolated ENet path | `server/supervisor/` tests cover invalid address/port rejection, dynamic port argument/env propagation and SDR-vs-ENet separation; real Agones dynamic/passthrough mapping, POP/cert/firewall/NAT and multi-match fixture remain |
 | 8.30 `[D:8.18,8.26,8.28,8.29]` | **IN PROGRESS.** Pure Go allocator filters Ready servers by region/build/protocol/transport, atomically claims one with idempotent allocation replay, and now owns the assignment-publication boundary | `server/domain/allocator.go` covers deterministic compatible selection, exhaustion, conflicting/identical allocation replay, unknown allocations, and assignment replay/conflict; Agones `GameServerAllocation`, signed roster metadata, bounded cross-replica retry and live integration remain |
 | 8.31 `[D:8.9,8.30]` | **IN PROGRESS.** Pure Go assignment gate requires Allocated state, exact allocation ID/match/server/region/build/protocol/transport compatibility, non-empty hosted endpoint and verified manifest signature before exposure; allocator publication cannot expose Ready state | `server/domain/assignment.go` and `allocator.go` plus adversarial fixtures cover early-connect, tampered signature/manifest, wrong compatibility, empty endpoint, unknown allocation and post-publication mutation rejection; Agones metadata watch, hosted-address registration, production signer and client-ticket publication remain |
-| 8.32 `[D:8.2,8.26,8.30]` | FleetAutoscaler with >=2 Ready processes across >=2 on-demand nodes/failure domains per queue-enabled region; pre-pull current/rollback; scale **Allocated** count to zero, never the Ready floor | Warm allocation meets p95 5 s/p99 10 s; disabled regions alone scale fully to zero; one-node loss retains certified Ready/headroom |
+| 8.32 `[D:8.2,8.26,8.30]` | **IN PROGRESS.** Provider-neutral FleetAutoscaler baseline preserves a two-process Ready buffer, caps warm capacity, and leaves Allocated scale-down independent of the Ready floor; Fleet image references remain digest-pinned for current/rollback pre-pull | `deploy/k8s/base/fleet-autoscaler.yaml` and manifest tests cover Fleet ownership, Buffer policy and floor/cap invariants; regional on-demand node pools/failure domains, pre-pull rollout, warm-allocation p95/p99 and N+1 certification remain |
 | 8.33 `[D:8.26,8.32]` | On-demand-only live capacity and measured N+1: loss of largest node leaves two Ready slots plus headroom for surviving Allocated matches | Interruptible nodes cannot receive live matches; forced node loss neither overloads survivors nor prevents the next allocation |
 | 8.34 `[D:8.28,8.29]` | Native x86_64 benchmark of boot-to-process-ready and assignment-ready, p99 CPU/RSS/network and 60 Hz ticks; limits/node cap with 30% headroom | Measurements replace old estimates and certify density with no tick backlog |
 | 8.35 `[D:8.17,8.19,8.20,8.30,8.31]` | **IN PROGRESS.** Pure Go initial-connect policy decides ranked 30 s no-show cancellation with abandon ladder and casual 60 s bot start only when each team has a human; empty-team casual allocations cancel | `server/domain/noshow.go` covers wait/deadline boundaries, deterministic no-show/innocent ordering, ranked cooldown history and no pre-live rating action; persistent ticket restoration, allocation shutdown, bot spawn and live integration remain |

server/security/test_fleet_manifests.py

@@ -20,6 +20,15 @@ class FleetManifestTest(unittest.TestCase):
         for hardening in ("runAsNonRoot: true", "automountServiceAccountToken: false", "readOnlyRootFilesystem: true", "allowPrivilegeEscalation: false"):
             self.assertIn(hardening, fleet)
 
+    def test_autoscaler_preserves_ready_floor_and_owns_fleet(self):
+        autoscaler = self.read("base/fleet-autoscaler.yaml")
+        for field in (
+            "kind: FleetAutoscaler", "namespace: cosmic-clash",
+            "fleetName: cosmic-clash-game", "type: Buffer",
+            "minReady: 2", "maxReady: 6", "bufferSize: 2",
+        ):
+            self.assertIn(field, autoscaler)
+
     def test_eu_and_na_overlays_are_distinct_and_namespaced(self):
         eu = self.read("overlays/eu/region.yaml")
         na = self.read("overlays/na/region.yaml")