Baylem · Oct 21, 2026 · Oct 21, 2026 · Oct 21, 2026 · Oct 21, 2026 · Oct 21, 2026
@@ -209,6 +209,13 @@ func main() {
 		protected.Use(authCheck.Middleware, target.Guard(serverUID))
 		mountProtected(protected)
 	})
+	// Backups bind save-off/save-on to the process they prepared. The service
+	// may already route to a replacement pod, which must reject the old UID.
+	r.Route("/v1/pods/{uid}", func(protected chi.Router) {
+		protected.Use(authCheck.Middleware, target.Guard(envOr("GAMEPLANE_POD_UID", "")), middleware.Timeout(30*time.Second))
+		protected.Get("/identity", func(w http.ResponseWriter, _ *http.Request) { w.WriteHeader(http.StatusNoContent) })
+		quiesce.Mount(protected, rconClient, gameName, quiesceSpec)
+	})
 
 	srv := &http.Server{
 		Addr:              addr,

@@ -12,6 +12,7 @@ import (
 	"github.com/go-chi/chi/v5"
 
 	"github.com/GameplanePanel/gameplane/agent/internal/caps"
+	"github.com/GameplanePanel/gameplane/agent/internal/target"
 )
 
 type fakeRcon struct {
@@ -86,6 +87,33 @@ func newTestRouter(rc Rcon, spec *caps.Quiesce) *chi.Mux {
 	return r
 }
 
+func TestPodBoundRoutesRejectReplacementBeforeRCON(t *testing.T) {
+	for _, actual := range []string{"original", "replacement", ""} {
+		t.Run("pod="+actual, func(t *testing.T) {
+			rc := &fakeRcon{}
+			r := chi.NewRouter()
+			r.Route("/v1/pods/{uid}", func(bound chi.Router) {
+				bound.Use(target.Guard(actual))
+				Mount(bound, rc, "test", minecraftQuiesceSpec())
+			})
+			for _, path := range []string{"quiesce", "unquiesce"} {
+				response := httptest.NewRecorder()
+				r.ServeHTTP(response, httptest.NewRequestWithContext(t.Context(), http.MethodPost, "/v1/pods/original/"+path, nil))
+				if actual == "original" {
+					if response.Code != http.StatusOK {
+						t.Fatalf("matching process rejected: %d", response.Code)
+					}
+				} else if response.Code != http.StatusNotFound {
+					t.Fatalf("wrong process admitted: %d", response.Code)
+				}
+			}
+			if (len(rc.calls()) > 0) != (actual == "original") {
+				t.Fatalf("commands reached wrong process: %v", rc.calls())
+			}
+		})
+	}
+}
+
 func decodeResponse(t *testing.T, body []byte) response {
 	t.Helper()
 	var got response

@@ -1,4 +1,4 @@
-// Package target binds versioned agent routes to an immutable GameServer UID.
+// Package target binds versioned agent routes to an immutable resource UID.
 package target
 
 import (
@@ -7,12 +7,13 @@ import (
 	"github.com/go-chi/chi/v5"
 )
 
-// Guard rejects a route for any server other than the one that started this
-// agent. Legacy routes stay available for local callers during rolling upgrades.
-func Guard(serverUID string) func(http.Handler) http.Handler {
+// Guard rejects a route for any resource other than the one that started this
+// agent (GameServer or Pod, according to the route). Legacy routes stay available
+// for local callers during rolling upgrades.
+func Guard(resourceUID string) func(http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-			if serverUID == "" || chi.URLParam(req, "uid") != serverUID {
+			if resourceUID == "" || chi.URLParam(req, "uid") != resourceUID {
 				http.NotFound(w, req)
 				return
 			}

@@ -177,6 +177,8 @@ Resource usage env vars (set by the operator):
 | `/players/banned` | GET | Currently banned players; response: `[ { name, reason?, source? } ]`; 502 if RCON unavailable |
 | `/quiesce` | POST | Pause auto-saves before snapshot; response: `{ quiesced, reason? }` (boolean, reason optional); unsupported games return `quiesced: false` with a reason |
 | `/unquiesce` | POST | Resume auto-saves after snapshot; response: `{ quiesced, reason? }` |
+| `/v1/pods/{uid}/identity` | GET | Operator preflight: 204 only when `{uid}` matches `GAMEPLANE_POD_UID`; never mutates game state |
+| `/v1/pods/{uid}/quiesce`, `/v1/pods/{uid}/unquiesce` | POST | Pod-bound backup RPCs with the same response contract as the legacy routes; reject missing/mismatched Pod UID with 404 before RCON |
 | `/lifecycle/stop` | POST | Run stop sequence before scale-to-zero; RCON connection drop is the expected outcome |
 | `/actions/run` | POST | Execute module-declared operator action; request: `{ id, params }`; response: `{ ok, raw? }` |
 | `/status` | GET | Live game metrics (module-declared); response: bare JSON array `[ { id, displayName?, value, unit? } ]` |
@@ -209,6 +211,7 @@ All endpoints on the `--addr` control mux, except `/healthz`, return `401 Unauth
 - **Extracted mod files stay world-readable**: `mods.moduleFileMode` is `0o644`, not a tighter `0o600`, because the mods volume is shared with the game container, which runs as whatever uid its image needs — a different uid than the agent's own. At `0o600` the game process couldn't read its own mods. This is the rationale behind the `.golangci.yml` gosec G302 exclusion scoped to `agent/internal/mods/mods.go`.
 - **Resource usage is in-pod**: The `usage` package reads from `/proc` or cgroups; no external metrics pipeline required. Cgroup mode is a fallback for older clusters; proc mode (default in production) requires the operator to set `ShareProcessNamespace: true`.
 - **Module capabilities drive behavior**: Every game-specific handler (players, quiesce, lifecycle, status, actions) reads its config from `--capabilities` (JSON unmarshaled into `caps.Spec`). New games require no agent code change.
+- **Backup process identity**: The operator injects `GAMEPLANE_POD_UID` from `metadata.uid` through the DownwardAPI. Pod-bound backup routes require the existing mTLS authentication and check this UID at the final network hop, including when the Service resolves to a replacement pod. Missing UID fails closed. Deploy the updated agent image and allow pod rollout when upgrading the operator; older agents return 404 and the operator does not fall back to unbound routes. Legacy endpoints remain available to existing callers during rollout.
 - **RCON connection errors are graceful**: A lost RCON connection does not crash the agent. `console`, `players`, `quiesce`, and `lifecycle` handlers catch connection errors and return appropriate HTTP status (e.g., `502 Bad Gateway`).
 - **Source RCON sends complete frames**: Each AUTH or command frame is submitted in one socket write, with its existing byte-size limit, request ID, type, body, and two NUL terminators preserved. This avoids separate header-only writes rejected by vanilla Minecraft's RCON reader. A short write is an error and drops the connection without replaying the command; response grace and healthy connection reuse remain unchanged.
 - **Log streams are tail-only**: The `logs` package does not support random-access reads. It streams from the current end (live mode) or from file start (backlog mode); clients must handle partial output and reconnection.

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: backups.gameplane.local
 spec:
@@ -129,6 +129,75 @@ spec:
           status:
             description: BackupStatus is the observed state of a Backup.
             properties:
+              captureManifest:
+                description: |-
+                  CaptureManifest is recorded once, before the first capture worker starts.
+                  It describes persistent-volume coverage independently of copy success.
+                  Missing on pre-upgrade backups; never reconstruct it from current layout.
+                properties:
+                  layoutSource:
+                    description: LayoutSource identifies the frozen workload used
+                      for mount paths.
+                    type: string
+                  quiesceOutcome:
+                    description: |-
+                      QuiesceOutcome is confirmed, already-stopped, unsupported, not-requested,
+                      agent-unavailable, or unknown, independent of subsequent copy success.
+                    type: string
+                  recordedAt:
+                    format: date-time
+                    type: string
+                  serverUID:
+                    type: string
+                  state:
+                    description: |-
+                      State is Recorded for new captures, LegacyUnknown for an existing worker
+                      whose original layout was never recorded.
+                    enum:
+                    - Recorded
+                    - LegacyUnknown
+                    type: string
+                  strategy:
+                    type: string
+                  volumes:
+                    items:
+                      description: |-
+                        BackupVolumeCoverage describes one persistent claim. Extra and loader/mod
+                        claims remain uncovered even when mounted beneath the primary data directory.
+                      properties:
+                        claimName:
+                          type: string
+                        claimUID:
+                          description: ClaimUID is empty if the claim did not yet
+                            exist at admission.
+                          type: string
+                        classification:
+                          description: |-
+                            Classification records the module/server declaration at admission;
+                            it does not prove that the volume can actually be reconstructed.
+                          enum:
+                          - data
+                          - rebuildable
+                          - unclassified
+                          type: string
+                        included:
+                          type: boolean
+                        mountPaths:
+                          items:
+                            type: string
+                          type: array
+                        reason:
+                          type: string
+                      required:
+                      - claimName
+                      - classification
+                      - included
+                      - reason
+                      type: object
+                    type: array
+                required:
+                - state
+                type: object
               completionTime:
                 format: date-time
                 type: string

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: backupschedules.gameplane.local
 spec:

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: clusters.gameplane.local
 spec:

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: gameservers.gameplane.local
 spec:
@@ -2212,6 +2212,16 @@ spec:
                         primary Storage.MountPath, since these exist precisely for directories
                         that share no safe common parent with it.
                       properties:
+                        backupRole:
+                          description: |-
+                            BackupRole describes recovery requirements without adding this volume
+                            to a backup. "data" needs a separate copy; "rebuildable" may be recreated.
+                            Unset remains unclassified and not covered. Both backup strategies still
+                            capture only the primary data claim.
+                          enum:
+                          - data
+                          - rebuildable
+                          type: string
                         mountPath:
                           description: MountPath is the absolute in-container path
                             this volume is mounted at.

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: gametemplates.gameplane.local
 spec:
@@ -2166,6 +2166,16 @@ spec:
                         primary Storage.MountPath, since these exist precisely for directories
                         that share no safe common parent with it.
                       properties:
+                        backupRole:
+                          description: |-
+                            BackupRole describes recovery requirements without adding this volume
+                            to a backup. "data" needs a separate copy; "rebuildable" may be recreated.
+                            Unset remains unclassified and not covered. Both backup strategies still
+                            capture only the primary data claim.
+                          enum:
+                          - data
+                          - rebuildable
+                          type: string
                         mountPath:
                           description: MountPath is the absolute in-container path
                             this volume is mounted at.

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: modules.gameplane.local
 spec:

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: modulesources.gameplane.local
 spec:

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: networkcaptures.gameplane.local
 spec:

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: restores.gameplane.local
 spec:

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: backups.gameplane.local
 spec:
@@ -129,6 +129,75 @@ spec:
           status:
             description: BackupStatus is the observed state of a Backup.
             properties:
+              captureManifest:
+                description: |-
+                  CaptureManifest is recorded once, before the first capture worker starts.
+                  It describes persistent-volume coverage independently of copy success.
+                  Missing on pre-upgrade backups; never reconstruct it from current layout.
+                properties:
+                  layoutSource:
+                    description: LayoutSource identifies the frozen workload used
+                      for mount paths.
+                    type: string
+                  quiesceOutcome:
+                    description: |-
+                      QuiesceOutcome is confirmed, already-stopped, unsupported, not-requested,
+                      agent-unavailable, or unknown, independent of subsequent copy success.
+                    type: string
+                  recordedAt:
+                    format: date-time
+                    type: string
+                  serverUID:
+                    type: string
+                  state:
+                    description: |-
+                      State is Recorded for new captures, LegacyUnknown for an existing worker
+                      whose original layout was never recorded.
+                    enum:
+                    - Recorded
+                    - LegacyUnknown
+                    type: string
+                  strategy:
+                    type: string
+                  volumes:
+                    items:
+                      description: |-
+                        BackupVolumeCoverage describes one persistent claim. Extra and loader/mod
+                        claims remain uncovered even when mounted beneath the primary data directory.
+                      properties:
+                        claimName:
+                          type: string
+                        claimUID:
+                          description: ClaimUID is empty if the claim did not yet
+                            exist at admission.
+                          type: string
+                        classification:
+                          description: |-
+                            Classification records the module/server declaration at admission;
+                            it does not prove that the volume can actually be reconstructed.
+                          enum:
+                          - data
+                          - rebuildable
+                          - unclassified
+                          type: string
+                        included:
+                          type: boolean
+                        mountPaths:
+                          items:
+                            type: string
+                          type: array
+                        reason:
+                          type: string
+                      required:
+                      - claimName
+                      - classification
+                      - included
+                      - reason
+                      type: object
+                    type: array
+                required:
+                - state
+                type: object
               completionTime:
                 format: date-time
                 type: string

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    gameplane.local/crd-bundle-sha256: afbe99d46e972c35a07f42486a1f8f6ec895c183017a9d2eef67b7ea07824f6b
+    gameplane.local/crd-bundle-sha256: 72656b2cb852f655e5e8b168918915102fcb5616b76dc73ebc8971942126de86
     controller-gen.kubebuilder.io/version: v0.22.0
   name: backupschedules.gameplane.local
 spec: