將Game Server跑起來

官方範例

這邊導入Fleet&FleetAutoscaler，簡單來說它會自動跑你的Game Server，進行自動擴展 https://agones.dev/site/docs/getting-started/create-fleet/
https://agones.dev/site/docs/getting-started/create-fleetautoscaler/

Fleet.yaml

設定containers內的image
env傳入自訂的環境變數 "cluster-autoscaler.kubernetes.io/safe-to-evict": "false": 如果你有設定Cluster Autoscaler要加上避免他會嘗試移動你的game server導致玩家斷線、遊戲中斷...

apiVersion: "agones.dev/v1"
kind: Fleet
metadata:
  name: simple-game-server
  annotations:
    "cluster-autoscaler.kubernetes.io/safe-to-evict": "false"
spec:
  replicas: 1
  template:
    spec:
      ports:
      - name: default
        containerPort: 7654
        portPolicy: Dynamic
        protocol: TCPUDP
      template:
        spec:
          containers:
          - name: simple-game-server
            image: gcr.io/[PROJECT_ID]/game-server-name:modified
            env:
            - name: "PORT"
              value: "7654"

FleetAutoscaler.yaml

設定bufferSize、minReplicas、maxReplicas，
fleetName必須對應Fleet的name

apiVersion: "autoscaling.agones.dev/v1"
kind: FleetAutoscaler
metadata:
  name: simple-game-server-autoscaler
spec:
  fleetName: simple-game-server
  policy:
    type: Buffer
    buffer:
      bufferSize: 5
      minReplicas: 5
      maxReplicas: 10

Apply

將兩個檔案Apply

kubectl apply -f Fleet.yaml
kubectl apply -f FleetAutoscaler.yaml

檢查有沒有game server跑起來 如果有5個都是Ready就是正常

kubectl get gs

可以嘗試修改一些上面兩個yaml檔後再進行Apply，你會發現更新版本就這麼簡單

Reference

Agones-Fleet
Agones-FleetAutoScaler