fix(multiplayer): keep abandonment maintenance available

deploy/k8s/base/kustomization.yaml

@@ -12,6 +12,7 @@ resources:
   - allocator-service.yaml
   - allocator-pdb.yaml
   - maintenance-deployment.yaml
+  - maintenance-pdb.yaml
   - fleet.yaml
   - fleet-autoscaler.yaml
   - game-server-pdb.yaml

deploy/k8s/base/maintenance-deployment.yaml

@@ -7,9 +7,12 @@ metadata:
     app.kubernetes.io/name: maintenance
     app.kubernetes.io/component: maintenance
 spec:
-  replicas: 1
+  replicas: 2
   strategy:
-    type: Recreate
+    type: RollingUpdate
+    rollingUpdate:
+      maxUnavailable: 0
+      maxSurge: 1
   selector:
     matchLabels:
       app.kubernetes.io/name: maintenance
@@ -22,6 +25,22 @@ spec:
       terminationGracePeriodSeconds: 10
       serviceAccountName: maintenance
       automountServiceAccountToken: false
+      topologySpreadConstraints:
+        - maxSkew: 1
+          topologyKey: topology.kubernetes.io/zone
+          whenUnsatisfiable: ScheduleAnyway
+          labelSelector:
+            matchLabels:
+              app.kubernetes.io/name: maintenance
+      affinity:
+        podAntiAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+            - weight: 100
+              podAffinityTerm:
+                topologyKey: kubernetes.io/hostname
+                labelSelector:
+                  matchLabels:
+                    app.kubernetes.io/name: maintenance
       securityContext:
         runAsNonRoot: true
         runAsUser: 10001

deploy/k8s/base/maintenance-pdb.yaml

@@ -0,0 +1,10 @@
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: maintenance
+  namespace: cosmic-clash
+spec:
+  minAvailable: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: maintenance