KEDA 不根據 RabbitMQ 隊列長度擴展 Pod

Question

我正在嘗試使用 KEDA 根據 RabbitMQ 消息隊列的當前長度自動擴展 Celery worker pod。 工作人員按預期運行，但是，它沒有在負載下擴展。

作為參考，我使用的是 KEDA v2.7.1。

來自 keda-operator pod 的日志：

1.6569289126033094e+09  ERROR   controller.scaledobject Reconciler error        {"reconciler group": "keda.sh", "reconciler kind": "ScaledObject", "name": "celery-worker-scaler", "namespace": "default", "error": "error establishing rabbitmq connection: dial tcp: lookup rabbitmq on 10.96.0.10:53: server misbehaving"}
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem
        /go/pkg/mod/sigs.k8s.io/controller-runtime@v0.11.2/pkg/internal/controller/controller.go:266
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2
        /go/pkg/mod/sigs.k8s.io/controller-runtime@v0.11.2/pkg/internal/controller/controller.go:227

顯然連接到rabbitmq pod有一些問題

keda.yaml：

apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: celery-worker-scaler
  namespace: default
spec:
  scaleTargetRef:
    name: celery-worker
  pollingInterval: 3
  minReplicaCount: 1
  maxReplicaCount: 10
  triggers:
    - type: rabbitmq
      metadata:
        host: amqp://guest:guest@rabbitmq:5672
        protocol: amqp
        queueName: celery
        mode: QueueLength
        value: "5"

rabbitmq.yaml：

# deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: rabbitmq
  labels:
    app: rabbitmq
spec:
  replicas: 1
  selector:
    matchLabels:
      app: rabbitmq
  template:
    metadata:
      labels:
        app: rabbitmq
    spec:
      containers:
      - name: rabbitmq
        image: rabbitmq:management
        env:
          - name: RABBITMQ_DEFAULT_USER
            valueFrom:
              secretKeyRef:
                name: secret
                key: rabbitmq-user
          - name: RABBITMQ_DEFAULT_PASS
            valueFrom:
              secretKeyRef:
                name: secret
                key: rabbitmq-password
        ports:
        - containerPort: 15672
          name: management
        - containerPort: 5672
          name: rabbitmq
---
# service
apiVersion: v1
kind: Service
metadata:
  name: rabbitmq
  labels:
    app: rabbitmq
spec:
  selector:
    app: rabbitmq
  ports:
  - port: 5672
    name: rabbitmq
    targetPort: rabbitmq
    protocol: TCP
  - port: 15672
    name: rabbitmq-mgmt
    targetPort: management

Answer 1

keda.yaml 文件應用在 keda 命名空間中（盡管我在頂部寫了 default）。 由於我的 rabbitmq pod 位於默認命名空間中，因此我必須將主機設置如下： amqp://guest:guest@rabbitmq.default:5672