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Nginx ingress. Routing by header.

We use the ingress nginx controller. We have an application (deployment, service , ingress) in namespace meg. You can check the app via command curl http://ckad.local:30102/app

You need create new deployment, service, ingress in namespace meg

  • deployment : name meg-app2 , env: name: SERVER_NAME and value: megApp2 , all other parameters copy from meg-app deployment
  • service : name meg-app2 -> deployment meg-app2
  • ingress : name meg-app2 -> service meg-app2 , route to the same address curl http://ckad.local:30102/app but with header X-Appversion=v2

In case of any other header value or unset header, the request should go to the old service.

check curl -H "X-Appversion: v2" http://ckad.local:30102/app 

Server Name: megApp2
URL: http://ckad.local:30102/
Client IP: 10.0.158.196
Method: GET
Protocol: HTTP/1.1
Headers:
X-Forwarded-For: 10.2.25.129
X-Forwarded-Proto: http
X-Scheme: http
X-Request-Id: 78fa94a9ffcab9268864bf006fa67cfa
X-Real-Ip: 10.2.25.129
X-Forwarded-Host: ckad.local:30102
X-Forwarded-Port: 80
X-Forwarded-Scheme: http
User-Agent: curl/7.68.0
Accept: */*
X-Appversion: v2

check curl -H "X-Appversion: v3" http://ckad.local:30102/app 

Server Name: megApp
URL: http://ckad.local:30102/
Client IP: 10.0.158.196
Method: GET
Protocol: HTTP/1.1
Headers:
X-Forwarded-For: 10.2.25.129
X-Request-Id: 139e579f92671116b1e12570e564f569
X-Real-Ip: 10.2.25.129
X-Forwarded-Scheme: http
X-Scheme: http
User-Agent: curl/7.68.0
Accept: */*
X-Appversion: v3
X-Forwarded-Host: ckad.local:30102
X-Forwarded-Port: 80
X-Forwarded-Proto: http

check curl http://ckad.local:30102/app 

Server Name: megApp
URL: http://ckad.local:30102/
Client IP: 10.0.158.196
Method: GET
Protocol: HTTP/1.1
Headers:
X-Request-Id: 119892e6edf24b4b794a025a9fb5c87e
X-Real-Ip: 10.2.25.129
X-Forwarded-For: 10.2.25.129
X-Forwarded-Host: ckad.local:30102
X-Forwarded-Port: 80
X-Scheme: http
Accept: */*
X-Forwarded-Proto: http
X-Forwarded-Scheme: http
User-Agent: curl/7.68.0

check result via tests

check_result


ubuntu@worker:~> check_result
 ✓ 0  Init
 ✓ 1.1 Check routing by  header  X-Appversion =  v2
 ✓ 1.2 Check routing by  header  X-Appversion =  v3
 ✓ 1.3 Check routing without  header  X-Appversion

4 tests, 0 failures
 result = 100.00 %   ok_points=3  all_points=3
time_left=327 minutes
you  spend 32 minutes