istio 遥测

查看istio-proxy指标的方法：

curl 127.0.0.1:15000/stats
curl 127.0.0.1:15000/stats/prometheus
kubectl exec -it demoappv10-5c497c6f7c-76gs7 -c istio-proxy -- pilot-agent request GET /stats/prometheus

查看启用的统计指标：

istioctl proxy-config bootstrap demoappv10-5c497c6f7c-76gs7.default | jq .bootstrap.statsConfig

在网格上配置代理级指标：

全局配置：

apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
  profile: default # 在命令行用--set=default定义也可以
  meshConfig:
    defaultConfig:
      proxyStatsMatcher:
        inclusionRegexps: # 以正则模式包含匹配到的指标
          - ".*circuit_breakers.*" # 指标中包含这个名称的指标都收集过来
        inclusionPrefixes: # 以前缀的方式指定指标
          - "upstream_rq_retry" # 启用重试相关的指标
          - "upstream_cx" # 启用上游连接信息指标

应用配置：istioctl的install指令相当于apply。

istioctl install -f istioOperator.yaml # --dry-run

单个工作负载的配置：可在pod、deployment等资源上定义（不推荐）

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx
  name: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
      annotations: # 在这配置
        proxy.istio.io/config: |-
          proxyStatsMatcher:
            inclusionRegexps:
              - ".*circuit_breakers.*"
            inclusionPrefixes:
              - "upstream_rq_retry"
              - "upstream_cx"
    spec:
      containers:
      - image: nginx
        name: nginx

获取配置：保存下来改改再应用即可。

istioctl profile dump demo > istio-profile-demo.yaml

或者直接应用要修改的内容即可：

apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
  profile: default
  meshConfig:
    defaultConfig:
      proxyStatsMatcher:
        inclusionRegexps:
          - ".*circuit_breakers.*"
        inclusionPrefixes:
          - "upstream_rq_retry"
          - "upstream_cx"

查看指标是否被启用：

curl PodIP:15020/stats/prometheus | grep circuit

服务基本指标使用telemetry v2：

apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
  profile: demo
  values:
    telemetry:
      v2:
        prometheus:
          configOverride:
            inboundSidecar:
              metrics:
                - name: requests_total
                  dimensions:
                    request_host: request.host
                    request_method: request.method
                  tags_to_remove:
                  - request_protocol
            outboundSidecar:
              metrics:
                - name: requests_total
                  dimensions:
                    request_host: request.host
                    request_method: request.method
                  tags_to_remove:
                  - request_protocol
            gateway:
              metrics:
                - name: requests_total
                  dimensions:
                    request_host: request.host
                    request_method: request.method
                  tags_to_remove:
                  - request_protocol

应用配置：

istioctl install -f istioOperator.yaml