如何通过ARMS APM应用监控服务实现应用的HPA弹性伸缩_容器服务 Kubernetes 版 ACK(ACK)-阿里云帮助中心

当应用接口的请求访问量飙升时，您可以通过Java应用接口的QPS配置HPA弹性策略，实现应用的弹性扩缩。本文介绍如何通过ARMS APM应用监控服务实现应用的HPA弹性伸缩。

工作原理

将ACK集群中的Java应用接入ARMS APM应用监控服务后，您可以通过ARMS APM获取应用接口的访问详情。关于如何将Java应用接入ARMS APM应用监控服务，请参见应用监控。ARMS APM应用监控服务将ARMS APM数据转换为阿里云Prometheus数据格式，alibaba-cloud-metrics-adapter组件将阿里云Prometheus指标转换成HPA可用的指标，最终实现应用的HPA弹性伸缩。

本文以部署应用arms-springboot-demo，并压测其中接口/demo/queryUser/10为例进行介绍。

前提条件

已部署阿里云Prometheus监控组件。具体操作，请参见步骤一：开启阿里云Prometheus监控。
已在命名空间kube-system中部署alibaba-cloud-metrics-adapter组件。具体操作，请参见部署alibaba-cloud-metrics-adapter组件。
已创建命名空间。具体操作，请参见管理命名空间与配额。本文创建的示例命名空间为arms-demo。
已安装JDK。关于ARMS APM应用监控支持的JDK版本，请参见ARMS应用监控支持的Java组件和框架。

操作流程

hpa

操作视频

步骤一：安装ARMS APM应用监控组件

为应用接入ARMS APM应用监控功能，需要在集群中安装ARMS APM应用监控组件one-pilot。

登录容器服务管理控制台，在左侧导航栏选择集群。
在集群列表页面，单击目标集群名称，然后在左侧导航栏，选择运维管理 > 组件管理。
在组件管理页面，搜索并定位ack-onepilot组件，在组件卡片区域单击安装，然后按照对话框提示配置参数，并单击确认。

步骤二：授予ARMS资源的访问权限

如需监控ACK Serverless集群或对接了ECI的集群应用，请在云资源访问授权页面完成授权，然后重启ack-onepilot组件下的所有Pod。
如需监控ACK集群应用，请先查看是否存在ARMS Addon Token。
展开查看集群中是否存在ARMS Addon Token
1. 登录容器服务管理控制台，在左侧导航栏选择集群。
2. 在集群列表页面，单击目标集群名称，然后在左侧导航栏，选择配置管理 > 保密字典。
3. 在页面顶部选择命名空间为kube-system，查看addon.arms.token是否存在。
- 如果ACK集群存在ARMS Addon Token，此时ARMS会进行免密授权。
  说明
  Kubernetes托管版集群默认存在ARMS Addon Token。但对于部分早期创建的Kubernetes托管版集群可能不存在ARMS Addon Token，请参考下文内容手动为集群授予ARMS资源的访问权限。
- 如果ACK集群中不存在ARMS Addon Token，请执行以下操作，手动为集群授予ARMS资源的访问权限。
  1. 创建自定义权限策略，策略内容如下。具体操作，请参见步骤一：创建自定义权限策略。
```
    {
      "Action": "arms:*",
      "Resource": "*",
      "Effect": "Allow"
    }
```
  2. 为集群的WorkerRole添加上一步创建的自定义权限。具体操作，请参见步骤二：为集群的Worker RAM角色授权。

步骤三：为Java应用开启ARMS APM应用监控

在集群中部署Java应用时，通过为应用打上Labels的方式开启ARMS APM应用监控。

登录容器服务管理控制台，在左侧导航栏选择集群。
在集群列表页面，单击目标集群名称，然后在左侧导航栏，选择工作负载 > 无状态。
在无状态页面右上角，单击使用YAML创建资源。

选择示例模板，并在模板（YAML格式）中将以下labels添加到spec.template.metadata层级下。

labels:
  armsPilotAutoEnable: "on"
  armsPilotCreateAppName: "<your-deployment-name>"    # 请将<your-deployment-name>替换为您的应用名称。
  one-agent.jdk.version: "OpenJDK11"    # 如果应用的JDK版本是JDK 11，则需要配置此参数。
  armsSecAutoEnable: "on"    # 如果需要接入应用安全，则需要配置此参数。

说明

应用安全详情，请参见什么是应用安全。
接入应用安全后，会产生对应的费用。关于计费详情，请参见计费说明。

YAML Example

以下提供YAML示例模板，展示如何创建一个无状态（Deployment）应用并开启ARMS APM应用监控。

展开查看完整YAML示例文件（Java）

apiVersion: v1
kind: Namespace
metadata:
  name: arms-demo
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: arms-springboot-demo
  namespace: arms-demo
  labels:
    app: arms-springboot-demo
spec:
  replicas: 2
  selector:
    matchLabels:
      app: arms-springboot-demo
  template:
    metadata:
      labels:
        app: arms-springboot-demo
        armsPilotAutoEnable: "on"
        armsPilotCreateAppName: "arms-k8s-demo"
        one-agent.jdk.version: "OpenJDK11"
    spec:
      containers:
        - resources:
            limits:
              cpu: 0.5
          image: registry.cn-hangzhou.aliyuncs.com/arms-docker-repo/arms-springboot-demo:v0.1
          imagePullPolicy: Always
          name: arms-springboot-demo
          env:
            - name: SELF_INVOKE_SWITCH
              value: "true"
            - name: COMPONENT_HOST
              value: "arms-demo-component"
            - name: COMPONENT_PORT
              value: "6666"
            - name: MYSQL_SERVICE_HOST
              value: "arms-demo-mysql"
            - name: MYSQL_SERVICE_PORT
              value: "3306"
---
apiVersion: v1
kind: Service
metadata:
  labels:
    name: arms-springboot-demo
  name: arms-springboot-demo
  namespace: arms-demo
spec:
  ports:
    # the port that this service should serve on
    - name: arms-demo-svc
      port: 6666
      targetPort: 8888
  # label keys and values that must match in order to receive traffic for this service
  selector:
    app: arms-springboot-demo
---
apiVersion: apps/v1 # for versions before 1.8.0 use apps/v1beta1
kind: Deployment
metadata:
  name: arms-springboot-demo-subcomponent
  namespace: arms-demo
  labels:
    app: arms-springboot-demo-subcomponent
spec:
  replicas: 2
  selector:
    matchLabels:
      app: arms-springboot-demo-subcomponent
  template:
    metadata:
      labels:
        app: arms-springboot-demo-subcomponent
        armsPilotAutoEnable: "on"
        armsPilotCreateAppName: "arms-k8s-demo-subcomponent"
        one-agent.jdk.version: "OpenJDK11"
    spec:
      containers:
        - resources:
            limits:
              cpu: 0.5
          image: registry.cn-hangzhou.aliyuncs.com/arms-docker-repo/arms-springboot-demo:v0.1
          imagePullPolicy: Always
          name: arms-springboot-demo-subcomponent
          env:
            - name: SELF_INVOKE_SWITCH
              value: "false"
            - name: MYSQL_SERVICE_HOST
              value: "arms-demo-mysql"
            - name: MYSQL_SERVICE_PORT
              value: "3306"
---
apiVersion: v1
kind: Service
metadata:
  labels:
    name: arms-demo-component
  name: arms-demo-component
  namespace: arms-demo
spec:
  ports:
    # the port that this service should serve on
    - name: arms-demo-component-svc
      port: 6666
      targetPort: 8888
  # label keys and values that must match in order to receive traffic for this service
  selector:
    app: arms-springboot-demo-subcomponent
---
apiVersion: apps/v1 # for versions before 1.8.0 use apps/v1beta1
kind: Deployment
metadata:
  name: arms-demo-mysql
  namespace: arms-demo
  labels:
    app: mysql
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
        - resources:
            limits:
              cpu: 0.5
          image: registry.cn-hangzhou.aliyuncs.com/arms-docker-repo/arms-demo-mysql:v0.1
          name: mysql
          ports:
            - containerPort: 3306
              name: mysql
---
apiVersion: v1
kind: Service
metadata:
  labels:
    name: mysql
  name: arms-demo-mysql
  namespace: arms-demo
spec:
  ports:
    # the port that this service should serve on
    - name: arms-mysql-svc
      port: 3306
      targetPort: 3306
  # label keys and values that must match in order to receive traffic for this service
  selector:
    app: mysql
---

查看部署ARMS APM应用效果。
在无状态页面，目标应用的操作列将出现ARMS控制台按钮。
您可以单击ARMS控制台跳转查看监控数据。在左侧导航栏，单击接口调用，查看应用接口（如HTTP接口）的访问详情。此处提供的Demo应用arms-springboot-demo，已自动产生了平稳的接口调用。
手动创建关联应用arms-springboot-demo的Service，并开启负载均衡来访问此应用的接口。
1. 在集群列表页面，单击目标集群名称，然后在左侧导航栏，选择网络 > 服务。
2. 单击页面右上角创建，创建关联应用的Service，然后单击创建。关于配置项的说明，请参见创建服务。
3. 稍等片刻，创建完成。在服务页面记录arms-demo-svc的外部端口，例如47.94.XX.XX:8080。
4. 执行如下命令，通过外部端口访问此服务的/demo/queryUser/10接口。
```
curl http://47.94.XX.XX:8080/demo/queryUser/10
```
  预期输出：
```
{"id":1,"name":"KeyOfSpectator","password":"12****"}
```
  预期输出表明，接口访问正常。

步骤四：对接alibaba-cloud-metrics-adapter组件

重要

请确保已部署阿里云Prometheus监控组件，否则无法进行本操作。具体操作，请参见步骤一：开启阿里云Prometheus监控。
请确保已在命名空间kube-system中部署alibaba-cloud-metrics-adapter组件，否则无法进行本操作。具体操作，请参见部署alibaba-cloud-metrics-adapter组件。

登录ARMS控制台。
在左侧导航栏选择Prometheus监控 > 实例列表，进入可观测监控 Prometheus 版的实例列表页面。
在实例列表页面，单击目标实例名称（格式为arms_metrics_{RegionId}_XXX），在左侧导航栏单击设置，然后在右侧设置页签的最下方查看并记录HTTP API地址（Grafana 读取地址），即Prometheus URL。
在ack-alibaba-cloud-metrics-adapter中填入上一步中记录的HTTP API地址（Grafana 读取地址）（Prometheus URL）。
1. 登录容器服务管理控制台，在左侧导航栏选择集群。
2. 在集群列表页面，单击目标集群名称，然后在左侧导航栏，选择应用 > Helm。
3. 在Helm页面ack-alibaba-cloud-metrics-adapter所在行，单击操作列的更新。
4. 在更新发布面板插入步骤 2中记录的Prometheus URL。

修改ack-alibaba-cloud-metrics-adapter的adapter-config配置。

在Helm页面，单击ack-alibaba-cloud-metrics-adapter。
在基本信息页签，单击adapter-config。
单击页面右上方YAML 编辑。

将如下内容添加至adapter-config中。

rules:
- metricsQuery: sum by (rpc) (sum_over_time(<<.Series>>{rpc="/demo/queryUser/{id}",service="arms-demo:arms-k8s-demo",prpc="__all__",ppid="__all__",endpoint="__all__",destId="__all__",<<.LabelMatchers>>}[1m]))
  name:
    as: ${1}_per_second_queryuser
    matches: ^(.*)_count
  resources:
    namespaced: false
  seriesQuery: arms_app_requests_count

完整示例如下：

展开查看代码详情

apiVersion: v1
data:
  config.yaml: >
    rules:

    - metricsQuery: sum(<<.Series>>{<<.LabelMatchers>>}) by (<<.GroupBy>>)
      name:
        as: ${1}_bytes_per_second
        matches: ^(.*)_bytes
      resources:
        overrides:
          namespace:
            resource: namespace
          pod:
            resource: pod
      seriesQuery: container_memory_working_set_bytes{namespace!="",pod!=""}
    - metricsQuery: sum(rate(<<.Series>>{<<.LabelMatchers>>}[1m])) by
    (<<.GroupBy>>)
      name:
        as: ${1}_core_per_second
        matches: ^(.*)_seconds_total
      resources:
        overrides:
          namespace:
            resource: namespace
          pod:
            resource: pod
      seriesQuery: container_cpu_usage_seconds_total{namespace!="",pod!=""}
    - metricsQuery: sum by (rpc)
    (sum_over_time(<<.Series>>{rpc="/demo/queryUser/{id}",service="arms-demo:arms-k8s-demo",prpc="__all__",ppid="__all__",endpoint="__all__",destId="__all__",<<.LabelMatchers>>}[1m]))
      name:
        as: ${1}_per_second_queryuser
        matches: ^(.*)_count
      resources:
        namespaced: false
      seriesQuery: arms_app_requests_count
kind: ConfigMap
metadata:
  annotations:
    meta.helm.sh/release-name: ack-alibaba-cloud-metrics-adapter
    meta.helm.sh/release-namespace: kube-system
  creationTimestamp: '2024-04-02T02:29:32Z'
  labels:
    app.kubernetes.io/managed-by: Helm
  managedFields:
    - apiVersion: v1
      fieldsType: FieldsV1
      fieldsV1:
        'f:data':
          .: {}
          'f:config.yaml': {}
        'f:metadata':
          'f:annotations':
            .: {}
            'f:meta.helm.sh/release-name': {}
            'f:meta.helm.sh/release-namespace': {}
          'f:labels':
            .: {}
            'f:app.kubernetes.io/managed-by': {}
      manager: rc
      operation: Update
      time: '2024-04-02T02:40:52Z'
  name: adapter-config
  namespace: kube-system
  resourceVersion: '8223891'
  uid: 294634e6-aeae-4048-9e69-365a4ce4b2cd

执行如下命令，查看集群中指标数据。

执行如下命令，查看指标arms_app_requests_per_second_queryuser是否存在。

kubectl get --raw "/apis/external.metrics.k8s.io/v1beta1"

预期输出：

{"kind":"APIResourceList","apiVersion":"v1","groupVersion":"external.metrics.k8s.io/v1beta1","resources":[{"name":"k8s_workload_memory_working_set","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_memory_rss","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"sls_ingress_latency_p9999","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l7_qps","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_memory_usage","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l4_traffic_rx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"sls_ingress_inflow","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l7_upstream_rt","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_ratio","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l4_traffic_tx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l4_packet_rx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"ahas_sentinel_pass_qps","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_memory_request","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"sls_ingress_latency_avg","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l4_max_connection","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_cpu_limit","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_day","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_month","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l4_connection_utilization","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l7_status_5xx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_cpu_request","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_network_rx_rate","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_network_rx_errors","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_week","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_memory_cache","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_cpu_request","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_percorepricing","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"sls_ingress_qps","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l4_packet_tx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l7_status_4xx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l7_upstream_5xx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_cpu_limit","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"ahas_sentinel_block_qps","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_cpu_utilization","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"sls_alb_ingress_qps","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_memory_utilization","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"sls_ingress_latency_p95","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l4_active_connection","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_memory_limit","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_hour","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l7_status_2xx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l7_status_3xx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_cpu_util","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_memory_usage","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_network_tx_rate","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"ahas_sentinel_total_qps","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_cpu_usage","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_network_tx_errors","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l7_rt","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_min","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"sls_ingress_latency_p50","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"sls_ingress_latency_p99","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"slb_l7_upstream_4xx","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"k8s_workload_memory_request","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"ahas_sentinel_avg_rt","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"cost_memory_limit","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]},{"name":"arms_app_requests_per_second_queryuser","singularName":"","namespaced":true,"kind":"ExternalMetricValueList","verbs":["get"]}]}

预期输出表明，指标arms_app_requests_per_second_queryuser存在。

执行如下命令，查看指标实时数据。

kubectl get --raw "/apis/external.metrics.k8s.io/v1beta1/namespaces/arms-demo/arms_app_requests_per_second_queryuser"| jq .

预期输出：

{
  "kind": "ExternalMetricValueList",
  "apiVersion": "external.metrics.k8s.io/v1beta1",
  "metadata": {},
  "items": [
    {
      "metricName": "arms_app_requests_per_second_queryuser",
      "metricLabels": {
        "rpc": "/demo/queryUser/10"
      },
      "timestamp": "2022-11-09T07:49:07Z",
      "value": "6"
    }
  ]
}

预期输出表明，实时数据返回正常。

步骤五：配置APM指标进行HPA扩缩

使用如下内容，创建hpa.yaml。

说明

hpa.yaml中的配置指标名与上一步ack-alibaba-cloud-metrics-adapter中定义的指标名需保持一致。
hpa.yaml中的target为弹性阈值，当QPS > 40时进行扩容。

apiVersion: autoscaling/v2beta2
kind: HorizontalPodAutoscaler
metadata:
  name: test-hpa
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: arms-springboot-demo
  minReplicas: 1
  maxReplicas: 10
  metrics:
    - type: External
      external:
        metric:
          name: arms_app_requests_per_second_queryuser
# External指标类型下只支持Value和AverageValue类型的目标值。
        target:
          type: AverageValue
          averageValue: 40

执行如下命令，对业务应用arms-springboot-demo部署HPA。
```
kubectl apply -f hpa.yaml
```

执行如下命令，查看指标变化。

kubectl get --raw "/apis/external.metrics.k8s.io/v1beta1/namespaces/arms-demo/arms_app_requests_per_second_queryuser"| jq .

预期输出：

{
  "kind": "ExternalMetricValueList",
  "apiVersion": "external.metrics.k8s.io/v1beta1",
  "metadata": {},
  "items": [
    {
      "metricName": "arms_app_requests_per_second_queryuser",
      "metricLabels": {
        "rpc": "/demo/queryUser/10"
      },
      "timestamp": "2022-11-09T07:53:16Z",
      "value": "4216"
    }
  ]
}

执行如下命令，查看HPA详情。

kubectl get hpa -n arms-demo

预期输出：

NAME       REFERENCE                         TARGETS         MINPODS   MAXPODS   REPLICAS   AGE
test-hpa   Deployment/arms-springboot-demo   300m/40 (avg)   1         10        10         148m

预期输出表明，Targets存在数据，HPA配置成功。

通过压测查看弹性扩缩容效果

执行如下命令，对Demo应用进行压测实验。
```
ab -c 50 -n 2000 http://47.94.XX.XX:8080/demo/queryUser/10
```
说明
47.94.XX.XX:8080为服务arms-demo-svc的外部端口。
查看弹性扩缩容效果。
- 可以在ARMS APM控制台看到，此接口的请求量因压测飙升。
- 可以在Prometheus大盘看到，当应用接口的QPS值超过阈值时，达到了HPA扩缩的效果。
- 在ACK集群中可以看到此demo应用的Pod副本数随接口调用的QPS进行扩缩。
  您可以通过执行命令kubectl describe hpa test-hpa -n arms-demo查看发生的扩缩容事件。