apiVersion: apps/v1
kind: Deployment
metadata:
  name: allocator
  namespace: cosmic-clash
  labels:
    app.kubernetes.io/name: allocator
    app.kubernetes.io/component: allocator
spec:
  replicas: 2
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 0
      maxSurge: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: allocator
  template:
    metadata:
      labels:
        app.kubernetes.io/name: allocator
        app.kubernetes.io/component: allocator
    spec:
      terminationGracePeriodSeconds: 10
      serviceAccountName: allocator
      # This role calls Agones CRDs through the Kubernetes API. The client
      # rereads the short-lived projected token on every request.
      automountServiceAccountToken: true
      topologySpreadConstraints:
        - maxSkew: 1
          topologyKey: topology.kubernetes.io/zone
          whenUnsatisfiable: ScheduleAnyway
          labelSelector:
            matchLabels:
              app.kubernetes.io/name: allocator
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
            - weight: 100
              podAffinityTerm:
                topologyKey: kubernetes.io/hostname
                labelSelector:
                  matchLabels:
                    app.kubernetes.io/name: allocator
      securityContext:
        runAsNonRoot: true
        runAsUser: 10001
        runAsGroup: 10001
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: allocator
          image: ghcr.io/cosmic-clash/allocator@sha256:0000000000000000000000000000000000000000000000000000000000000000
          args:
            - --dsn=$(COSMIC_CLASH_POSTGRES_DSN)
            - --agones-url=https://kubernetes.default.svc
            - --agones-namespace=cosmic-clash
            - --provider-timeout=10s
            - --readiness-max-stale=30s
            - --workload-token-ttl=2h
            - --metrics-addr=:9091
            # Without these the allocator binds allocations but never publishes
            # an assignment roster, and no allocated match can become joinable.
            # The same key material is mounted into game servers by fleet.yaml.
            - --join-authorisations-key-file=/run/secrets/cosmic-clash/join-signing-keys.json
            - --join-authorisations-key-id=$(COSMIC_CLASH_JOIN_SIGNING_KEY_ID)
          ports:
            - name: metrics
              containerPort: 9091
          volumeMounts:
            - name: join-signing-keys
              mountPath: /run/secrets/cosmic-clash
              readOnly: true
          readinessProbe:
            httpGet:
              path: /readyz
              port: metrics
            initialDelaySeconds: 2
            periodSeconds: 5
            timeoutSeconds: 2
            failureThreshold: 3
          livenessProbe:
            httpGet:
              path: /healthz
              port: metrics
            initialDelaySeconds: 10
            periodSeconds: 10
            timeoutSeconds: 2
            failureThreshold: 3
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            capabilities:
              drop: [ALL]
          resources:
            requests:
              cpu: 100m
              memory: 128Mi
            limits:
              cpu: 1
              memory: 512Mi
          env:
            - name: COSMIC_CLASH_POSTGRES_DSN
              valueFrom:
                secretKeyRef:
                  name: cosmic-clash-database
                  key: dsn
            - name: COSMIC_CLASH_WORKLOAD_SECRET
              valueFrom:
                secretKeyRef:
                  name: cosmic-clash-workload
                  key: secret
            # Rotation: publish the new key in the Secret everywhere first,
            # then move this ID to it, then drop the retired key once no live
            # match can still reference it.
            - name: COSMIC_CLASH_JOIN_SIGNING_KEY_ID
              valueFrom:
                secretKeyRef:
                  name: cosmic-clash-game-server
                  key: join-signing-key-id
      volumes:
        - name: join-signing-keys
          secret:
            secretName: cosmic-clash-game-server
            defaultMode: 0400
            items:
              - key: join-signing-keys.json
                path: join-signing-keys.json