如何在一个Istio服务网格中托管多个应用程序?

时间:2019-04-04 11:38:54

标签: docker kubernetes graphql istio hasura

我正在建立一个Istio服务网格,其中两个服务都运行Graphql引擎。我打算将它们设置在两个不同的子路径上。您将如何在VirtualService上设置重定向?

我已经尝试使用此VirtualService配置

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: hasura-1
spec:
  hosts:
  - "*"
  gateways:
  - hasura-gateway
  http:
  - match:
    - uri:
        prefix: /hasura1
    route:
    - destination:
        host: hasura-1
        port:
          number: 80
  - match:
    - uri:
        prefix: /hasura2
    route:
    - destination:
        host: hasura-2
        port:
          number: 80

但是,每当尝试访问这些前缀时,我仍然会遇到错误404。

编辑:我已经更新了虚拟服务,以合并 rewrite.uri 。每当我尝试访问这两个前缀时,都将重定向到/,它会发出错误404。这是我更新的网关和VirtualService清单。

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: hasura-gateway
spec:
  selector:
    istio: ingressgateway # use istio default controller
  servers:
  - port:
      number: 80
      name: http
      protocol: HTTP
    hosts:
    - "*"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: hasura-1
spec:
  hosts:
  - "*"
  gateways:
  - hasura-gateway
  http:
  - match:
    - uri:
        exact: /hasura1
    rewrite:
      uri: /
    route:
    - destination:
        host: hasura-1
        port:
          number: 80
  - match:
    - uri:
        exact: /hasura2
    rewrite:
      uri: /
    route:
    - destination:
        host: hasura-2
        port:
          number: 80
---

1 个答案:

答案 0 :(得分:1)

您在Hasura的GraphQL端点配置的路径上是什么?

VirtualService的配置方式,对网关的请求的行为如下:

my.host.com/hasura1-> hasura-1/hasura1
my.host.com/hasura1/anotherpath-> hasura-1/hasura1/anotherpath
my.host.com/hasura2-> hasura-2/hasura2

也许您缺少一条rewrite.uri规则,无法从请求中删除路径。

例如:使用此规则:

http:
- match:
  - uri:
      prefix: /hasura1
  rewrite:
    uri: /
  route:
  - destination:
      host: hasura-1
      port:
        number: 80

您的Hasura容器应在根路径上收到请求:

my.host.com/hasura1-> hasura-1/
my.host.com/hasura1/anotherpath-> hasura-1/anotherpath