如何配置 Istio 虚拟服务目标协议

Question

如何配置 Istio VirtualService 以将流量路由到侦听 HTTPS 的目标后端？

配置 protocol: HTTPS 或 scheme: HTTPS 无效。

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: api-rpi-access
spec:
  hosts:
  - "test.example.com"
  gateways:
  - api-gateway
  http:
  - match:
    - uri:
        port: https
        prefix: /
    route:
    - destination:
        host: some-https-service
        port:
          number: 8443
          protocol: HTTPS
        # scheme: HTTPS

这是我的网关：

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: api-gateway
spec:
  selector:
    istio: ingressgateway
  servers:
  - port:
      number: 443
      name: https
      protocol: HTTPS
    tls:
      mode: SIMPLE
      serverCertificate: /etc/istio/ingressgateway-certs/tls.crt
      privateKey: /etc/istio/ingressgateway-certs/tls.key
    hosts:
    - "test.example.com"

Answer 1

您是否也设置了目标规则，例如：

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: dr-test.example.com
spec:
  host: test.example.com
  trafficPolicy: # Apply to all ports
    portLevelSettings:
    - port:
        number: 443
      loadBalancer:
        simple: LEAST_CONN

some good information on istio routing

Answer 2

当前您的网关配置为在网关上终止 TLS。您的 VirtualService 也需要少量修改。

您需要将网关的 TLS 模式更改为直通。

    tls:
      mode: PASSTHROUGH

根据 istio 文档：

Define a Gateway with a server section for port 443. Note the PASSTHROUGH TLS mode which instructs the gateway to pass the ingress traffic AS IS, without terminating TLS.

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: mygateway
spec:
  selector:
    istio: ingressgateway # use istio default ingress gateway
  servers:
  - port:
      number: 443
      name: https
      protocol: HTTPS
    tls:
      mode: PASSTHROUGH
    hosts:
    - nginx.example.com

Configure routes for traffic entering via the Gateway:

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: nginx
spec:
  hosts:
  - nginx.example.com
  gateways:
  - mygateway
  tls:
  - match:
    - port: 443
      sniHosts:
      - nginx.example.com
    route:
    - destination:
        host: my-nginx
        port:
          number: 443

希望对您有所帮助。

Answer 3

为了在 istio ingressgateway 上执行 LTS 终止并将 https 流量发送到后端，我必须添加以下 DestinationRule

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: some-https-service
spec:
  host: diary
  trafficPolicy:
    tls:
      mode: SIMPLE

这里是网关和虚拟服务：

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: api-gateway
spec:
  selector:
    istio: ingressgateway
  servers:
  - port:
      number: 443
      name: https
      protocol: HTTPS
    tls:
      mode: SIMPLE
      serverCertificate: /etc/istio/ingressgateway-certs/tls.crt
      privateKey: /etc/istio/ingressgateway-certs/tls.key
    hosts:
    - "test.example.com"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: ext-access
spec:
  hosts:
  - "test.example.com"
  gateways:
  - api-gateway
  http:
  - match:
    - uri:
        port: https
        prefix: /
    route:
    - destination:
        host: some-https-service
        port:
          number: 8443

如何配置 Istio 虚拟服务目标协议

How to configure Istio Virtual Service destination protocol

kubernetes

istio