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Using Keycloak behind a reverse proxy: Could not open Admin loginpage because mixed Content

so I have a problem getting keycloak 3.2.1 to work behind kong (0.10.3), a reverse proxy based on nginx.

Scenario is:

I call keycloak via my gateway-route via https://{gateway}/auth and it shows me the entrypoint with keycloak logo, link to admin console etc. - so far so good.

But when clicking on administration console -> calling https://{gateway}/auth/admin/master/console/ , keycloak tries to load its css/js via http (see screenie below), which my browser blocks because mixed content.

I searched around and found this thread: keycloak apache server configuration with 'Mixed Content' problems which lead to this github repo: https://github.com/dukecon/keycloak_postgres_https

From there on, I tried to integrate its' cli into my dockerfile with success (did not change the files' contents, just copied them into my repo and add/run them from dockerfile). This is my dockerfile right now:

FROM jboss/keycloak-postgres:3.2.1.Final

USER root

ADD config.sh /tmp/
ADD batch.cli /tmp/

RUN bash /tmp/config.sh

#Give correct permissions when used in an OpenShift environment.
RUN chown -R jboss:0 $JBOSS_HOME/standalone && \
    chmod -R g+rw $JBOSS_HOME/standalone

USER jboss
EXPOSE 8080

Sadly, my problem still exists: error

So I am out of ideas for now and hope you could help me out:

  • How do I tell keycloak to call its' css-files via https here?

  • do I have to change something in the cli script?

Here's the content of the script:

config.sh:

#!/bin/bash -x

set -e

JBOSS_HOME=/opt/jboss/keycloak
JBOSS_CLI=$JBOSS_HOME/bin/jboss-cli.sh
JBOSS_MODE=${1:-"standalone"}
JBOSS_CONFIG=${2:-"$JBOSS_MODE.xml"}

echo "==> Executing..."
cd /tmp

$JBOSS_CLI --file=`dirname "$0"`/batch.cli

# cf. http://stackoverflow.com/questions/34494022/permissions-error-when-using-cli-in-jboss-wildfly-and-docker
/bin/rm -rf ${JBOSS_HOME}/${JBOSS_MODE}/configuration/${JBOSS_MODE}_xml_history/current

and batch.cli:

embed-server --std-out=echo

# http://keycloak.github.io/docs/userguide/keycloak-server/html/server-installation.html
# 3.2.7.2. Enable SSL on a Reverse Proxy
# First add proxy-address-forwarding and redirect-socket to the http-listener element.
# Then add a new socket-binding element to the socket-binding-group element.

batch

/subsystem=undertow/server=default-server/http-listener=default:write-attribute(name=proxy-address-forwarding,value=true)

/subsystem=undertow/server=default-server/http-listener=default:write-attribute(name=redirect-socket,value=proxy-https)

/socket-binding-group=standard-sockets/socket-binding=proxy-https:add(port=443)

run-batch

stop-embedded-server

It may be of interest too, that kong is deployed on openshift with a route using a redirect from http to https ( "insecureEdgeTerminationPolicy": "Redirect" ).

Solution

  • This sounds somehow like a duplicate of Keycloak Docker behind loadbalancer with https fails

    Set the request headers X-Forwarded-For and X-Forwarded-Proto in nginx. Then you have to configure Keycloak (Wildfly, Undertow) to work together with the SSL terminating reverse proxy (aka load balancer). See http://www.keycloak.org/docs/latest/server_installation/index.html#_setting-up-a-load-balancer-or-proxy for a detailed description.

    The point is that nginx is terminating SSL and is forwarding the requests to Keycloak as pure http. Therefore Keycloak/Wildfly must be told that the incoming http requests from nginx must be handled like they were https.