kubernetes 部署rocketmq

在Kubernetes上部署RocketMQ（阿里云开源的分布式消息中间件）可以提供高可用性和可扩展性。以下是部署RocketMQ的步骤：

### 1. 准备环境
确保你已经有一个运行中的Kubernetes集群，并且已经安装了`kubectl`命令行工具。

### 2. 创建命名空间
为了更好地管理资源，建议创建一个新的命名空间：

kubectl create namespace rocketmq

### 3. 创建持久化存储
RocketMQ需要持久化存储来保存消息数据。你可以使用Kubernetes的持久卷（Persistent Volume）和持久卷声明（Persistent Volume Claim）来管理存储。

创建一个持久卷声明：

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: rocketmq-pvc
  namespace: rocketmq
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi

应用持久卷声明：

kubectl apply -f rocketmq-pvc.yaml

### 4. 部署NameServer
创建一个YAML文件`rocketmq-nameserver.yaml`来定义NameServer的部署和服务：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: rocketmq-nameserver
  namespace: rocketmq
spec:
  replicas: 2
  selector:
    matchLabels:
      app: rocketmq-nameserver
  template:
    metadata:
      labels:
        app: rocketmq-nameserver
    spec:
      containers:
        - name: rocketmq-nameserver
          image: rocketmqinc/rocketmq-nameserver:latest
          ports:
            - containerPort: 9876
          volumeMounts:
            - name: storage
              mountPath: /home/rocketmq/logs
      volumes:
        - name: storage
          persistentVolumeClaim:
            claimName: rocketmq-pvc

---

apiVersion: v1
kind: Service
metadata:
  name: rocketmq-nameserver
  namespace: rocketmq
spec:
  selector:
    app: rocketmq-nameserver
  ports:
    - protocol: TCP
      port: 9876
      targetPort: 9876

应用NameServer的部署和服务：

kubectl apply -f rocketmq-nameserver.yaml

### 5. 部署Broker
创建一个YAML文件`rocketmq-broker.yaml`来定义Broker的部署和服务：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: rocketmq-broker
  namespace: rocketmq
spec:
  replicas: 2
  selector:
    matchLabels:
      app: rocketmq-broker
  template:
    metadata:
      labels:
        app: rocketmq-broker
    spec:
      containers:
        - name: rocketmq-broker
          image: rocketmqinc/rocketmq-broker:latest
          ports:
            - containerPort: 10909
            - containerPort: 10911
          env:
            - name: NAMESERVER_ADDR
              value: "rocketmq-nameserver:9876"
          volumeMounts:
            - name: storage
              mountPath: /home/rocketmq/logs
      volumes:
        - name: storage
          persistentVolumeClaim:
            claimName: rocketmq-pvc

---

apiVersion: v1
kind: Service
metadata:
  name: rocketmq-broker
  namespace: rocketmq
spec:
  selector:
    app: rocketmq-broker
  ports:
    - protocol: TCP
      port: 10909
      targetPort: 10909
    - protocol: TCP
      port: 10911
      targetPort: 10911

应用Broker的部署和服务：

kubectl apply -f rocketmq-broker.yaml

### 6. 验证部署
使用`kubectl`命令验证所有组件是否正常运行：

kubectl get pods -n rocketmq
kubectl get services -n rocketmq

### 7. 配置客户端
在应用程序中使用RocketMQ客户端时，需要配置NameServer地址为`rocketmq-nameserver:9876`。