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。
安装 cert-manager 以自动管理证书。
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
为您的域名配置 DNS 记录。
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>
设置环境变量保存目标域名:
$ TELEMETRY_DOMAIN=<your.desired.domain>
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:
- Bluehost: DNS 管理增改删 DNS 条目
- GoDaddy: 添加 A 记录
- Google Domains: 资源记录
- Name.com: 添加 A 记录
验证 DNS 记录无误。
$ dig +short $TELEMETRY_DOMAIN <IP ADDRESS OF CLUSTER INGRESS>
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
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
应用遥测插件的网络配置。
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
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
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
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
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/
- Kiali:
方式 2:不安全访问(HTTP)
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
- Grafana:
应用遥测插件的网络配置。
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
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
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
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
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/
- Kiali:
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