Kubernetes 1.20.15 高可用 RabbitMQ 3.8.2 部署指南：NodePort 暴露、密码设置和 ConfigMap 挂载

以下是部署高可用 RabbitMQ 3.8.2 的步骤：

1. 创建 RabbitMQ 的 namespace

apiVersion: v1
kind: Namespace
metadata:
  name: rabbitmq

2. 创建 RabbitMQ 的 configmap

apiVersion: v1
kind: ConfigMap
metadata:
  name: rabbitmq-config
  namespace: rabbitmq
data:
  rabbitmq.conf: |
    loopback_users.guest = false
    listeners.tcp.default = 5672
    management.tcp.port = 15672
  enabled_plugins: |
    [rabbitmq_management].

3. 创建 RabbitMQ 的 StatefulSet

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: rabbitmq
  namespace: rabbitmq
spec:
  serviceName: rabbitmq
  replicas: 2
  selector:
    matchLabels:
      app: rabbitmq
  template:
    metadata:
      labels:
        app: rabbitmq
    spec:
      containers:
        - name: rabbitmq
          image: rabbitmq:3.8.2-management-alpine
          env:
            - name: RABBITMQ_ERLANG_COOKIE
              value: 'rabbitmq-cookie'
            - name: RABBITMQ_DEFAULT_USER
              value: 'admin'
            - name: RABBITMQ_DEFAULT_PASS
              valueFrom:
                secretKeyRef:
                  name: rabbitmq-secret
                  key: password
          ports:
            - name: amqp
              containerPort: 5672
            - name: management
              containerPort: 15672
          volumeMounts:
            - name: rabbitmq-config-volume
              mountPath: /etc/rabbitmq
      volumes:
        - name: rabbitmq-config-volume
          configMap:
            name: rabbitmq-config
  volumeClaimTemplates:
    - metadata:
        name: rabbitmq-data
      spec:
        accessModes: ['ReadWriteOnce']
        storageClassName: 'standard'
        resources:
          requests:
            storage: 1Gi

4. 创建 RabbitMQ 的 Service

apiVersion: v1
kind: Service
metadata:
  name: rabbitmq
  namespace: rabbitmq
spec:
  ports:
    - name: amqp
      port: 5672
      targetPort: 5672
    - name: management
      port: 15672
      targetPort: 15672
  selector:
    app: rabbitmq
  type: NodePort

5. 创建 RabbitMQ 的 Secret

apiVersion: v1
kind: Secret
metadata:
  name: rabbitmq-secret
  namespace: rabbitmq
type: Opaque
data:
  password: base64-encoded-password

其中，base64-encoded-password 是通过 base64 编码后的 RabbitMQ 密码。

完成上述步骤后，就可以在 Kubernetes 集群中部署高可用 RabbitMQ 3.8.2，并暴露 NodePort，设置密码，使用 ConfigMap 挂载方式。