Ambassador and 302 redirects

[marcin-kasinski]

I have zipkin service :

---
apiVersion: v1
kind: Service
metadata:
  name: springbootzipkin
  annotations:
    getambassador.io/config: |
      ---
      apiVersion: ambassador/v0
      kind: TracingService
      name: tracing
      service: springbootzipkin:7777
      driver: zipkin
      ---
      apiVersion: ambassador/v0
      kind:  Mapping
      name:  springbootzipkin_mapping
      prefix: /springbootzipkin
      timeout_ms: 10000
      service: springbootzipkin.apps:7777
      ---
spec:
  type: NodePort
...

I test it with:

wget http://${GATEWAY_URL}/springbootzipkin
--2018-12-21 12:56:30--  http://10.109.22.156/springbootzipkin
Connecting to 10.109.22.156:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: ./zipkin/ [following]
--2018-12-21 12:56:31--  http://10.109.22.156/zipkin/
Reusing existing connection to 10.109.22.156:80.
HTTP request sent, awaiting response... 404 Not Found
2018-12-21 12:56:31 ERROR 404: Not Found.

In ambassador log I can see:

ACCESS [2018-12-21T12:56:31.008Z] "GET /springbootzipkin HTTP/1.1" 302 - 0 0 9 8 "10.44.0.0" "Wget/1.19.4 (linux-gnu)" "06608c8b-6db0-990c-8d85-57ba5845ce1b" "10.109.22.156" "10.111.73.173:7777"
ACCESS [2018-12-21T12:56:31.023Z] "GET /zipkin/ HTTP/1.1" 404 NR 0 0 0 - "10.44.0.0" "Wget/1.19.4 (linux-gnu)" "3269d38f-b8ed-954d-af55-0d6772c3e3af" "10.109.22.156" "-"

I get 404 becasue of zipkin reply with 302 /zipkin redirect.

My question is:

How can I solve this problem ?

It would be great on ambassador to inject this reply based on my mapping and instead of /zikpin reply with /springbootzipkin/zikpin

[kflynn]

Envoy, on which Ambassador is built, doesn't have a way to rewrite received HTML or redirects. Many web apps are now offering a way to tell the application the path under which it's running (e.g., tell your Zipkin installation that its routing prefix is /springbootzipkin/zipkin/ instead of just /zipkin/). This is a much more robust solution than trying to do rewriting in the proxy.

I'm going to go ahead and close this issue. Our Slack channel is also available if you have further questions.

[lily524]

@marcin-kasinski Do you find the solution for redirect issue?