github.com/syrilster/go-currency-exchange-service

Currency-Exchange-Service

This is an API layer built to connect to the openexchangerates.org and get the latest currency rates. The service will then perform some internal calculations and return the conversion multiple for fromCurrency to toCurrency conversion.

Debugging

• Once the app is in Running status (check kubectl get pods), exec (execute a command directly inside the Pod) into the Pod to check its environment variables using command. This will give the HOST IP details

  kubectl exec <pod_name> -- env
  kubectl exec currency-exchange-app-7966496848-c7tf6 -- env
  

• Let's access this application from another Pod using the environment variables.

  kubectl run --rm --generator=run-pod/v1 curl --image=radial/busyboxplus:curl -i --tty
  

• Use curl to hit the endpoint and verify the results

  curl -vvv --request GET 'http://10.0.14.113:8000/v1/currency-exchange/from/EUR/to/INR'
  

• Using the DNS:

  The FQDN format is <service-name>.<namespace>.<cluster-domain-suffix>
  Ex: curl -vvv --request GET 'http://currency-exchange-service.default.svc.cluster.local:8000/v1/currency-exchange/from/EUR/to/INR'