X-Forwarded-Proto

Summary

A spinner of "Loading the admin console ..." never finished when I try to open the Administration console of keycloak behind the HAproxy. Then looking at the browser console, there is an error indicating that a request to the keycloak is said "Mixed Contents".

Conclusion

It may be because there is no X-Forwarded-Proto in the backend description of haproxy.

Issue

Open keycloak behind the haproxy.

A spinner of "Loading the admin console ..." never finished when I try to open the Administration console of keycloak behind the HAproxy. Then looking at the browser console, there is an error indicating that a request to the keycloak is said "Mixed Contents".

Cause

As the error message indicates, the protocol of request to keycloak is wrong as http of http://keycloak instead https

Solution

Add X-Forwarded-Proto to the backend for keycloak on the file haproxy.cfg as follow so that the access protocol from haproxy to keycloak is https.

backend keycloak
	http-request add-header X-Forwarded-Proto https if { ssl_fc }
  server keycloak 				127.0.0.1:8080

That's it!

Successfully opened the Administration console.

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