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通过ARMS Go探针和ASM对Go应用进行全链路灰度并实时监控

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本文介绍如何通过ARMS Go探针和ASM对Go应用进行全链路灰度并实时监控。

Demo应用

Demo应用部署架构：

image

Demo应用YAML：

说明

所有应用均部署在go-gray命名空间下。

  • 入口应用

    apiVersion: apps/v1
kind: Deployment
metadata:
  name: requestsender
  namespace: go-gray
spec:
  replicas: 1
  selector:
    matchLabels:
      app: requestsender
  template:
    metadata:
      labels:
        app: requestsender
        ASM_TRAFFIC_TAG: v1
        version: v1
        armsPilotCreateAppName: requestsender
        armsPilotAutoEnable: 'on'
        aliyun.com/app-language: golang
    spec:
      containers:
        - name: requestsender
          image: registry.cn-hangzhou.aliyuncs.com/private-mesh/hellob:requestsender-demo
          imagePullPolicy: Always
          ports:
            - containerPort: 8080

---
apiVersion: v1
kind: Service
metadata:
  name: requestsender
  namespace: go-gray
spec:
  selector:
    app: requestsender
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  type: ClusterIP

  • 应用A

    apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-demo-a-base
  namespace: go-gray
spec:
  replicas: 1
  selector:
    matchLabels:
      app: go-demo-a
  template:
    metadata:
      labels:
        app: go-demo-a
        armsPilotAutoEnable: "on"
        ASM_TRAFFIC_TAG: v1
        version: v1
        armsPilotCreateAppName: "go-demo-a"
        aliyun.com/app-language: golang
    spec:
      containers:
        - name: go-demo-a
          image: registry.cn-hangzhou.aliyuncs.com/private-mesh/hellob:a-demo
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-demo-a-gray
  namespace: go-gray
spec:
  replicas: 1
  selector:
    matchLabels:
      app: go-demo-a
  template:
    metadata:
      labels:
        app: go-demo-a
        ASM_TRAFFIC_TAG: v2
        version: v2
        armsPilotCreateAppName: go-demo-a
        armsPilotAutoEnable: 'on'
        aliyun.com/app-language: golang
    spec:
      containers:
        - name: go-demo-a-base
          image: registry.cn-hangzhou.aliyuncs.com/private-mesh/hellob:a-demo-gray
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: go-demo-a
  namespace: go-gray
spec:
  selector:
    app: go-demo-a
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  type: ClusterIP

  • 应用B

    apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-demo-b-base
  namespace: go-gray
spec:
  replicas: 1
  selector:
    matchLabels:
      app: go-demo-b
  template:
    metadata:
      labels:
        app: go-demo-b
        ASM_TRAFFIC_TAG: v1
        version: v1
        armsPilotCreateAppName: go-demo-b
        armsPilotAutoEnable: 'on'
        aliyun.com/app-language: golang
    spec:
      containers:
        - name: go-demo-b
          image: registry.cn-hangzhou.aliyuncs.com/private-mesh/hellob:b-demo
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-demo-b-gray
  namespace: go-gray
spec:
  replicas: 1
  selector:
    matchLabels:
      app: go-demo-b
  template:
    metadata:
      labels:
        app: go-demo-b
        ASM_TRAFFIC_TAG: v2
        version: v2
        armsPilotCreateAppName: go-demo-b
        armsPilotAutoEnable: 'on'
        aliyun.com/app-language: golang
    spec:
      containers:
        - name: go-demo-b
          image: registry.cn-hangzhou.aliyuncs.com/private-mesh/hellob:b-demo-gray
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: go-demo-b
  namespace: go-gray
spec:
  selector:
    app: go-demo-b
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  type: ClusterIP

  • 应用C

    apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-demo-c-base
  namespace: go-gray
spec:
  replicas: 1
  selector:
    matchLabels:
      app: go-demo-c
  template:
    metadata:
      labels:
        app: go-demo-c
        ASM_TRAFFIC_TAG: v1
        version: v1
        armsPilotCreateAppName: go-demo-c
        armsPilotAutoEnable: 'on'
        aliyun.com/app-language: golang
    spec:
      containers:
        - name: go-demo-c
          image: registry.cn-hangzhou.aliyuncs.com/private-mesh/hellob:c-demo
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-demo-c-gray
  namespace: go-gray
spec:
  replicas: 1
  selector:
    matchLabels:
      app: go-demo-c
  template:
    metadata:
      labels:
        app: go-demo-c
        ASM_TRAFFIC_TAG: v2
        version: v2
        armsPilotCreateAppName: go-demo-c
        armsPilotAutoEnable: 'on'
        aliyun.com/app-language: golang
    spec:
      containers:
        - name: go-demo-c
          image: registry.cn-hangzhou.aliyuncs.com/private-mesh/hellob:c-demo-gray
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: go-demo-c
  namespace: go-gray
spec:
  selector:
    app: go-demo-c
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  type: ClusterIP

使用ARMS监控Golang应用

通过Golang探针将Go应用接入ARMS应用监控，即可在ARMS中查看对应应用的应用拓扑、接口调用、数据库分析等相关监控数据。

使用ASM进行全链路灰度

  1. 创建ASM实例并添加集群。

  2. 创建入口网关。

  3. 使用以下内容创建命名空间为istio-system的ingressgateway网关规则。具体操作，请参见创建ingressgateway网关规则。

    展开查看网关规则YAML示例

    apiVersion: networking.istio.io/v1beta1
kind: Gateway
metadata:
  name: ingressgateway
  namespace: istio-system
spec:
  selector:
    istio: ingressgateway
  servers:
    - port:
        number: 80
        name: http
        protocol: HTTP
      hosts:
        - '*'

  4. 给Demo的所有应用注入Sidecar并重启。具体操作，请参见安装Sidecar代理。

  5. 配置链路追踪。

    1. 创建opentelemetry-operator-system命名空间。

      kubectl create namespace opentelemetry-operator-system

    2. 创建链路追踪的Service。

      apiVersion: v1
kind: Service
metadata:
  name: default-collector
  namespace: opentelemetry-operator-system
spec:
  ports:
    - port: 4317
      protocol: TCP
      targetPort: 4317
  selector:
    app: default-collector
  sessionAffinity: None
  type: ClusterIP

    3. 在ASM控制台开启链路追踪。

      • OpenTelemetry服务域名（完整FQDN）：default-collector.opentelemetry-operator-system.svc.cluster.local

      • OpenTelemetry服务端口：4317

      image

    4. 在可观测配置页面的链路追踪设置区域，启用链路追踪，并按需配置采样率。

      image

  6. 创建泳道。

    1. 创建泳道组test。

      配置项

      说明

      trace id请求头

      traceparent

      引流请求头

      x-asm-prefer-tag

      泳道服务

      requestsender、go-demo-a、go-demo-b、go-demo-c

      image

    2. 创建v1和v2泳道。

      配置项

      说明

      泳道名称

      分别配置为v1、v2

      配置服务标签

      标签名称：选择ASM_TRAFFIC_TAG

      标签值：分别选择v1、v2

      添加服务

      v1泳道：选择requestsender、go-demo-a、go-demo-b、go-demo-c

      v2泳道：选择go-demo-a、go-demo-c

    3. 分别为v1和v2泳道添加引流规则。

      配置项

      说明

      入口服务

      选择requestsender.go-gray.svc.cluster.local

      引流规则

      名称：分别输入v1、v2

      域名：*

      匹配方式：精确

      匹配内容：/greetinit

      创建完成示例：

      image

验证结果

  1. 在ASM网关 > 入口网关页面获取ASM网关的公网IP。

  2. 执行以下命令，设置环境变量。

    xxx.xxx.xxx.xxx为上一步获取的IP。

    export ASM_GATEWAY_IP=xxx.xxx.xxx.xxx

  3. 验证全链路灰度功能是否生效。

    • 基线：

      for i in {1..100};  do curl   -H 'x-asm-prefer-tag: v1' http://${ASM_GATEWAY_IP}/greetinit;  echo ''; sleep 1; done;

      预期输出：

      {"code":0,"data":{"greeting":"Hello ","callChain":"Init:base:172.30.208.29 - A:base:172.30.208.114 - B:base:172.30.208.116 - C:base:172.30.208.120"},"message":"success"}
{"code":0,"data":{"greeting":"Hello ","callChain":"Init:base:172.30.208.29 - A:base:172.30.208.114 - B:base:172.30.208.116 - C:base:172.30.208.120"},"message":"success"}

    • 灰度：

      for i in {1..100};  do curl   -H 'x-asm-prefer-tag: v2' http://${ASM_GATEWAY_IP}/greetinit;  echo ''; sleep 1; done;

      预期输出：

      {"code":0,"data":{"greeting":"Hello ","callChain":"Init:base:172.30.208.29 - A:gray:172.30.208.115 - B:base:172.30.208.116 - C:gray:172.30.208.122"},"message":"success"}
{"code":0,"data":{"greeting":"Hello ","callChain":"Init:base:172.30.208.29 - A:gray:172.30.208.115 - B:base:172.30.208.116 - C:gray:172.30.208.122"},"message":"success"}

查看监控数据

在ARMS控制台的应用监控 > 应用列表页面查看对应的Go应用监控。

image

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