How to configure apisix route to make an external kubernetes http request?

Question

Environment:

AKS v1.25.6
apisix helm deployed: https://artifacthub.io/packages/helm/apisix/apisix
- chart version: 2.1.0
- apisix-ingress-controller:1.6.0
- apisix:3.4.0

I were trying this configuration


apiVersion: v1
kind: Service
metadata:
  name: chuck-norris-api-external-service
  namespace: api-gateway
spec:
  type: ExternalName
  externalName: api.chucknorris.io
  ports:
    - port: 443

---

apiVersion: apisix.apache.org/v2
kind: ApisixUpstream
metadata:
  name: chuck-norris-api-upstream
  namespace: api-gateway
spec:
  externalNodes:
    - name: chuck-norris-api-external-service
      type: Service

---

apiVersion: apisix.apache.org/v2
kind: ApisixRoute
metadata:
  name: chuck-norris-api-route
  namespace: api-gateway
spec:
  http:
    - name: chuck-norris-api
      match:
        hosts:
          - gateway.api-gateway.svc
          - api.dev.dom
        paths:
          - /external/chucknorrisapi/*
      upstreams:
        - name: chuck-norris-api-upstream
      plugins:
        - name: proxy-rewrite
          enable: true
          config:
            regex_uri:
              - '^/external/chucknorrisapi/(.*)'
              - '/jokes/$1'

The configuration is applied successfully but when requesting to: [GET] 'https://api.dev.dom/external/chucknorrisapi/random', I got a 500 Internal Server Error. In apisix pod logs it can be seen some ssl related problem:

2023/08/16 13:06:17 [error] 51#51: *1756996 lua entry thread aborted: runtime error: /usr/local/apisix/apisix/init.lua:332: attempt to index local 'matched_ssl' (a nil value)
stack traceback:
coroutine 0:
    /usr/local/apisix/apisix/init.lua: in function 'verify_https_client'
    /usr/local/apisix/apisix/init.lua:560: in function 'http_access_phase'
    access_by_lua(nginx.conf:408):2: in main chunk, client: 172.23.148.7, server: _, request: "GET /external/chucknorrisapi/random HTTP/1.1", host: "api.dev.dom:443"

I'm aware of kubernetes disclaimer: https://kubernetes.io/docs/concepts/services-networking/service/#externalname but i would need some help workaround it.

I'm also tried with no success to rewrite the host in the proxy-rewrite plugin, but I'm not able to override the upstream config with something like this, with the purpose of remove the ApisixUpstream and Service configuration:

apiVersion: apisix.apache.org/v2
kind: ApisixRoute
metadata:
  name: chuck-norris-api-route
  namespace: api-gateway
spec:
  http:
    - name: chuck-norris-api
      match:
        hosts:
          - gateway.api-gateway.svc
          - api.dev.dom
        paths:
          - /external/chucknorrisapi/*
      upstreams:
        nodes: {
          "127.0.0.1:80": 1
        }
        type: "roundrobin"
      plugins:
        - name: proxy-rewrite
          enable: true
          config:
            host: 'https://api.chucknorris.io'
            regex_uri:
              - '^/external/chucknorrisapi/(.*)'
              - '/jokes/$1'

This config complains about the syntax of upstreams.

I'm open mind to any workaround, I just want to define an apisix route to an external-kubernetes api. Thank you all.

How to configure apisix route to make an external kubernetes http request?

0 Answers0