距离 Istio 1.5 版本发布还有 天。

远程访问遥测插件

此任务说明如何配置 Istio 以显示和访问集群外部的遥测插件。

配置远程访问

远程访问遥测插件的方式有很多种。 该任务涵盖了两种基本访问方式:安全的(通过 HTTPS)和不安全的(通过 HTTP)。 对于任何生产或敏感环境,强烈建议 通过安全方式访问。 不安全访问易于设置,但是无法保护在集群外传输的任何凭据或数据。

方式 1:安全访问(HTTPS)

安全访问需要一个服务器证书。按照这些步骤来为您的域名安装并配置服务器证书。

您也可以使用自签名证书。访问配置使用 SDS 通过 HTTPS 访问的安全网关任务以了解使用自签名证书访问集群内服务的详情。

  1. 安装 cert-manager 以自动管理证书。

  2. 安装 Istio 到您的集群并启用 cert-manager 标志且配置 istio-ingressgateway 使用 Secret Discovery Service

    要安装相应的 Istio,使用下列安装选项:

    • --set values.gateways.enabled=true
    • --set values.gateways.istio-ingressgateway.enabled=true
    • --set values.gateways.istio-ingressgateway.sds.enabled=true

    要额外安装遥测插件,使用下列安装选项:

    • Grafana: --set values.grafana.enabled=true
    • Kiali: --set values.kiali.enabled=true
    • Prometheus: --set values.prometheus.enabled=true
    • Tracing: --set values.tracing.enabled=true
  3. 为您的域名配置 DNS 记录。

    1. 获取 istio-ingressgateway 的外部 IP 地址。

      $ kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.status.loadBalancer.ingress[0].ip}'
      <IP ADDRESS OF CLUSTER INGRESS>
      
    2. 设置环境变量保存目标域名:

      $ TELEMETRY_DOMAIN=<your.desired.domain>
      
    3. 通过您的域名提供商将所需的域名指向该外部 IP 地址。

      实现此步骤的机制因提供商而异。以下是一些示例文档链接:

    4. 验证 DNS 记录无误。

      $ dig +short $TELEMETRY_DOMAIN
      <IP ADDRESS OF CLUSTER INGRESS>
      
  4. 生成服务器证书

    $ cat <<EOF | kubectl apply -f -
    apiVersion: certmanager.k8s.io/v1alpha1
    kind: Certificate
    metadata:
      name: telemetry-gw-cert
      namespace: istio-system
    spec:
      secretName: telemetry-gw-cert
      issuerRef:
        name: letsencrypt
        kind: ClusterIssuer
      commonName: $TELEMETRY_DOMAIN
      dnsNames:
      - $TELEMETRY_DOMAIN
      acme:
        config:
        - http01:
            ingressClass: istio
          domains:
          - $TELEMETRY_DOMAIN
    ---
    EOF
    certificate.certmanager.k8s.io "telemetry-gw-cert" created
    
  5. 等待服务器证书准备就绪。

    $ JSONPATH='{range .items[*]}{@.metadata.name}:{range @.status.conditions[*]}{@.type}={@.status}{end}{end}' && kubectl -n istio-system get certificates -o jsonpath="$JSONPATH"
    telemetry-gw-cert:Ready=True
    
  6. 应用遥测插件的网络配置。

    1. 应用以下配置以暴露 Grafana:

      $ cat <<EOF | kubectl apply -f -
      apiVersion: networking.istio.io/v1alpha3
      kind: Gateway
      metadata:
        name: grafana-gateway
        namespace: istio-system
      spec:
        selector:
          istio: ingressgateway
        servers:
        - port:
            number: 15031
            name: https-grafana
            protocol: HTTPS
          tls:
            mode: SIMPLE
            serverCertificate: sds
            privateKey: sds
            credentialName: telemetry-gw-cert
          hosts:
          - "$TELEMETRY_DOMAIN"
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: VirtualService
      metadata:
        name: grafana-vs
        namespace: istio-system
      spec:
        hosts:
        - "$TELEMETRY_DOMAIN"
        gateways:
        - grafana-gateway
        http:
        - match:
          - port: 15031
          route:
          - destination:
              host: grafana
              port:
                number: 3000
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: DestinationRule
      metadata:
        name: grafana
        namespace: istio-system
      spec:
        host: grafana
        trafficPolicy:
          tls:
            mode: DISABLE
      ---
      EOF
      gateway.networking.istio.io "grafana-gateway" configured
      virtualservice.networking.istio.io "grafana-vs" configured
      destinationrule.networking.istio.io "grafana" configured
      
    2. 应用以下配置以暴露 Kiali:

      $ cat <<EOF | kubectl apply -f -
      apiVersion: networking.istio.io/v1alpha3
      kind: Gateway
      metadata:
        name: kiali-gateway
        namespace: istio-system
      spec:
        selector:
          istio: ingressgateway
        servers:
        - port:
            number: 15029
            name: https-kiali
            protocol: HTTPS
          tls:
            mode: SIMPLE
            serverCertificate: sds
            privateKey: sds
            credentialName: telemetry-gw-cert
          hosts:
          - "$TELEMETRY_DOMAIN"
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: VirtualService
      metadata:
        name: kiali-vs
        namespace: istio-system
      spec:
        hosts:
        - "$TELEMETRY_DOMAIN"
        gateways:
        - kiali-gateway
        http:
        - match:
          - port: 15029
          route:
          - destination:
              host: kiali
              port:
                number: 20001
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: DestinationRule
      metadata:
        name: kiali
        namespace: istio-system
      spec:
        host: kiali
        trafficPolicy:
          tls:
            mode: DISABLE
      ---
      EOF
      gateway.networking.istio.io "kiali-gateway" configured
      virtualservice.networking.istio.io "kiali-vs" configured
      destinationrule.networking.istio.io "kiali" configured
      
    3. 应用以下配置以暴露 Prometheus:

      $ cat <<EOF | kubectl apply -f -
      apiVersion: networking.istio.io/v1alpha3
      kind: Gateway
      metadata:
        name: prometheus-gateway
        namespace: istio-system
      spec:
        selector:
          istio: ingressgateway
        servers:
        - port:
            number: 15030
            name: https-prom
            protocol: HTTPS
          tls:
            mode: SIMPLE
            serverCertificate: sds
            privateKey: sds
            credentialName: telemetry-gw-cert
          hosts:
          - "$TELEMETRY_DOMAIN"
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: VirtualService
      metadata:
        name: prometheus-vs
        namespace: istio-system
      spec:
        hosts:
        - "$TELEMETRY_DOMAIN"
        gateways:
        - prometheus-gateway
        http:
        - match:
          - port: 15030
          route:
          - destination:
              host: prometheus
              port:
                number: 9090
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: DestinationRule
      metadata:
        name: prometheus
        namespace: istio-system
      spec:
        host: prometheus
        trafficPolicy:
          tls:
            mode: DISABLE
      ---
      EOF
      gateway.networking.istio.io "prometheus-gateway" configured
      virtualservice.networking.istio.io "prometheus-vs" configured
      destinationrule.networking.istio.io "prometheus" configured
      
    4. 应用以下配置以暴露跟踪服务:

      $ cat <<EOF | kubectl apply -f -
      apiVersion: networking.istio.io/v1alpha3
      kind: Gateway
      metadata:
        name: tracing-gateway
        namespace: istio-system
      spec:
        selector:
          istio: ingressgateway
        servers:
        - port:
            number: 15032
            name: https-tracing
            protocol: HTTPS
          tls:
            mode: SIMPLE
            serverCertificate: sds
            privateKey: sds
            credentialName: telemetry-gw-cert
          hosts:
          - "$TELEMETRY_DOMAIN"
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: VirtualService
      metadata:
        name: tracing-vs
        namespace: istio-system
      spec:
        hosts:
        - "$TELEMETRY_DOMAIN"
        gateways:
        - tracing-gateway
        http:
        - match:
          - port: 15032
          route:
          - destination:
              host: tracing
              port:
                number: 80
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: DestinationRule
      metadata:
        name: tracing
        namespace: istio-system
      spec:
        host: tracing
        trafficPolicy:
          tls:
            mode: DISABLE
      ---
      EOF
      gateway.networking.istio.io "tracing-gateway" configured
      virtualservice.networking.istio.io "tracing-vs" configured
      destinationrule.networking.istio.io "tracing" configured
      
  7. 通过浏览器访问这些遥测插件。

    • Kiali: https://$TELEMETRY_DOMAIN:15029/
    • Prometheus: https://$TELEMETRY_DOMAIN:15030/
    • Grafana: https://$TELEMETRY_DOMAIN:15031/
    • Tracing: https://$TELEMETRY_DOMAIN:15032/

方式 2:不安全访问(HTTP)

  1. 安装 Istio 到您的集群并启用您所需要的遥测插件。

    要额外安装这些遥测插件,使用下列安装选项:

    • Grafana: --set values.grafana.enabled=true
    • Kiali: --set values.kiali.enabled=true
    • Prometheus: --set values.prometheus.enabled=true
    • Tracing: --set values.tracing.enabled=true
  2. 应用遥测插件的网络配置。

    1. 应用以下配置以暴露 Grafana:

      $ cat <<EOF | kubectl apply -f -
      apiVersion: networking.istio.io/v1alpha3
      kind: Gateway
      metadata:
        name: grafana-gateway
        namespace: istio-system
      spec:
        selector:
          istio: ingressgateway
        servers:
        - port:
            number: 15031
            name: http-grafana
            protocol: HTTP
          hosts:
          - "*"
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: VirtualService
      metadata:
        name: grafana-vs
        namespace: istio-system
      spec:
        hosts:
        - "*"
        gateways:
        - grafana-gateway
        http:
        - match:
          - port: 15031
          route:
          - destination:
              host: grafana
              port:
                number: 3000
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: DestinationRule
      metadata:
        name: grafana
        namespace: istio-system
      spec:
        host: grafana
        trafficPolicy:
          tls:
            mode: DISABLE
      ---
      EOF
      gateway.networking.istio.io "grafana-gateway" configured
      virtualservice.networking.istio.io "grafana-vs" configured
      destinationrule.networking.istio.io "grafana" configured
      
    2. 应用以下配置以暴露 Kiali:

      $ cat <<EOF | kubectl apply -f -
      apiVersion: networking.istio.io/v1alpha3
      kind: Gateway
      metadata:
        name: kiali-gateway
        namespace: istio-system
      spec:
        selector:
          istio: ingressgateway
        servers:
        - port:
            number: 15029
            name: http-kiali
            protocol: HTTP
          hosts:
          - "*"
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: VirtualService
      metadata:
        name: kiali-vs
        namespace: istio-system
      spec:
        hosts:
        - "*"
        gateways:
        - kiali-gateway
        http:
        - match:
          - port: 15029
          route:
          - destination:
              host: kiali
              port:
                number: 20001
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: DestinationRule
      metadata:
        name: kiali
        namespace: istio-system
      spec:
        host: kiali
        trafficPolicy:
          tls:
            mode: DISABLE
      ---
      EOF
      gateway.networking.istio.io "kiali-gateway" configured
      virtualservice.networking.istio.io "kiali-vs" configured
      destinationrule.networking.istio.io "kiali" configured
      
    3. 应用以下配置以暴露 Prometheus:

      $ cat <<EOF | kubectl apply -f -
      apiVersion: networking.istio.io/v1alpha3
      kind: Gateway
      metadata:
        name: prometheus-gateway
        namespace: istio-system
      spec:
        selector:
          istio: ingressgateway
        servers:
        - port:
            number: 15030
            name: http-prom
            protocol: HTTP
          hosts:
          - "*"
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: VirtualService
      metadata:
        name: prometheus-vs
        namespace: istio-system
      spec:
        hosts:
        - "*"
        gateways:
        - prometheus-gateway
        http:
        - match:
          - port: 15030
          route:
          - destination:
              host: prometheus
              port:
                number: 9090
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: DestinationRule
      metadata:
        name: prometheus
        namespace: istio-system
      spec:
        host: prometheus
        trafficPolicy:
          tls:
            mode: DISABLE
      ---
      EOF
      gateway.networking.istio.io "prometheus-gateway" configured
      virtualservice.networking.istio.io "prometheus-vs" configured
      destinationrule.networking.istio.io "prometheus" configured
      
    4. 应用以下配置以暴露跟踪服务:

      $ cat <<EOF | kubectl apply -f -
      apiVersion: networking.istio.io/v1alpha3
      kind: Gateway
      metadata:
        name: tracing-gateway
        namespace: istio-system
      spec:
        selector:
          istio: ingressgateway
        servers:
        - port:
            number: 15032
            name: http-tracing
            protocol: HTTP
          hosts:
          - "*"
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: VirtualService
      metadata:
        name: tracing-vs
        namespace: istio-system
      spec:
        hosts:
        - "*"
        gateways:
        - tracing-gateway
        http:
        - match:
          - port: 15032
          route:
          - destination:
              host: tracing
              port:
                number: 80
      ---
      apiVersion: networking.istio.io/v1alpha3
      kind: DestinationRule
      metadata:
        name: tracing
        namespace: istio-system
      spec:
        host: tracing
        trafficPolicy:
          tls:
            mode: DISABLE
      ---
      EOF
      gateway.networking.istio.io "tracing-gateway" configured
      virtualservice.networking.istio.io "tracing-vs" configured
      destinationrule.networking.istio.io "tracing" configured
      
  3. 通过浏览器访问这些遥测插件。

    • Kiali: http://<IP ADDRESS OF CLUSTER INGRESS>:15029/
    • Prometheus: http://<IP ADDRESS OF CLUSTER INGRESS>:15030/
    • Grafana: http://<IP ADDRESS OF CLUSTER INGRESS>:15031/
    • Tracing: http://<IP ADDRESS OF CLUSTER INGRESS>:15032/

清除

  • 移除所有相关的网关:

    $ kubectl -n istio-system delete gateway grafana-gateway kiali-gateway prometheus-gateway tracing-gateway
    gateway.networking.istio.io "grafana-gateway" deleted
    gateway.networking.istio.io "kiali-gateway" deleted
    gateway.networking.istio.io "prometheus-gateway" deleted
    gateway.networking.istio.io "tracing-gateway" deleted
    
  • 移除所有相关的 Virtual Services:

    $ kubectl -n istio-system delete virtualservice grafana-vs kiali-vs prometheus-vs tracing-vs
    virtualservice.networking.istio.io "grafana-vs" deleted
    virtualservice.networking.istio.io "kiali-vs" deleted
    virtualservice.networking.istio.io "prometheus-vs" deleted
    virtualservice.networking.istio.io "tracing-vs" deleted
    
  • 如果安装了网关证书,移除它:

    $ kubectl -n istio-system delete certificate telemetry-gw-cert
    certificate.certmanager.k8s.io "telemetry-gw-cert" deleted
    
这些信息有用吗?
Do you have any suggestions for improvement?

Thanks for your feedback!