Istio：单个网关和多个虚拟服务（每个都在不同的命名空间中）

Question

如何在 Istio 1.9 中设置单个网关和多个虚拟服务（每个都在不同的命名空间中）。我无法为每个虚拟服务设置一个网关，因为浏览器利用 HTTP/2 connection reuse 产生 404 错误。

如果我遵循 these instructions 它将无法工作，因为网关和虚拟服务不能在不同的命名空间中。

这些是清单文件：

APP1:

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: app1-gateway
  namespace: app1
spec:
  selector:
    istio: ingressgateway # use istio default controller
  servers:
  - port:
      number: 80
      name: http
      protocol: HTTP
    hosts:
    - "app1.example.com"
    tls:
      httpsRedirect: true # sends 301 redirect for http requests
  - port:
      number: 443
      name: https-app1
      protocol: HTTPS
    tls:
      mode: SIMPLE
      credentialName: sslcertificate
    hosts:
    - "app1.example.com"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: app1
  namespace: app1
spec:
  hosts:
  - "app1.example.com"
  gateways:
  - app1-gateway
  http:
  - match:
    - uri:
        prefix: /
    route:
    - destination:
        host: app1
        port:
          number: 80

APP2:

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: app2-gateway
  namespace: app2
spec:
  selector:
    istio: ingressgateway # use istio default controller
  servers:
  - port:
      number: 80
      name: http
      protocol: HTTP
    hosts:
    - "app2.example.com"
    tls:
      httpsRedirect: true # sends 301 redirect for http requests
  - port:
      number: 443
      name: https-app2
      protocol: HTTPS
    tls:
      mode: SIMPLE
      credentialName: sslcertificate
    hosts:
    - "app2.example.com"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: app2
  namespace: app2
spec:
  hosts:
  - "app2.example.com"
  gateways:
  - app2-gateway
  http:
  - match:
    - uri:
        prefix: /
    route:
    - destination:
        host: app2
        port:
          number: 80

Answer 1

回答你的问题，because gateway and virtualservice can't be in different namespaces，实际上它们可以在不同的命名空间中。

如果它与虚拟服务不在同一个命名空间中，您只需在虚拟服务中指定该命名空间 spec.gateways。

检查spec.gateways部分

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: bookinfo-Mongo
  namespace: bookinfo-namespace
spec:
  gateways:
  - some-config-namespace/my-gateway # can omit the namespace if gateway is in same
                                       namespace as virtual service.

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: my-gateway
  namespace: some-config-namespace

有相关的istio documentation。

Istio：单个网关和多个虚拟服务（每个都在不同的命名空间中）

Istio: single gateway and multiple VirtualServices (each one in a different namespace)

kubernetes

istio

istio-gateway