Keycloak returns "404 - Not Found" page

Question

I am trying to install Keycloak on my PC. I have the Java 8 JDK installed.

After running \\bin\\standalone.bat , when I go to the page 127.0.0.1:9990/auth , I am returned the error

404 - Not Found

Answer 1

I had set a "Frontend URL" ( Keycloak Admin Console > Realm Settings > General Frontend Url ) for the realm that looked like this: http://localhost:8080 while the client's "Root URL" was http://localhost:8080/auth .

After removing the "Frontend URL" everything worked fine. Another solution was to set both fields to http://localhost:8080/auth .

Answer 2

The correct port for Keycloak is 8080 . The 9990 is the port for Wildfly administration.
Use http://localhost:8080/auth

Answer 3

If you will check keycloak documentation you will get detail information about port that you can modify as well only condition that port should not capture by any other application.

 <socket-binding-group name="standard-sockets" default-interface="public" port-offset="${jboss.socket.binding.port-offset:0}">
        <socket-binding name="management-http" interface="management" port="${jboss.management.http.port:9990}"/>
        <socket-binding name="management-https" interface="management" port="${jboss.management.https.port:9993}"/>
        <socket-binding name="ajp" port="${jboss.ajp.port:8009}"/>
        <socket-binding name="http" port="${jboss.http.port:8080}"/>
        <socket-binding name="https" port="${jboss.https.port:8443}"/>
        <socket-binding name="txn-recovery-environment" port="4712"/>
        <socket-binding name="txn-status-manager" port="4713"/>
        <outbound-socket-binding name="mail-smtp">
            <remote-destination host="localhost" port="25"/>
        </outbound-socket-binding>
    </socket-binding-group>

So default port http its 8080 and https its 8443

Answer 4

I had the same problem and then noticed that when I started standalone .bac, at the beginning of the prompt it said something like "JBOSS_HOME may be pointing to a different installation - unpredictable results may occur.", then if is that the case, just delete the JBOSS_HOME environment variable. I solved in this way. (I don't know how good is this solution, but i had no other ways to make it works)

Answer 5

I was facing this issue with Keycloak running on Ubuntu image inside Docker. What worked for me was adding -b 0.0.0.0 argument.

So one can try running following command: bin/standalone.sh -b 0.0.0.0

You may be able to access console at localhost:8080

Answer 6

In my case the docs I read didn't mention to edit the <default-bindings .... datasource=... when adding a database. The server.log showed the wrong datasource name 'ExampleDS' which made it clear enough:

2021-11-15 18:32:29,302 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([("deployment" => "keycloak-server.war")]) - failure description: {
    "WFLYCTL0412: Required services that are not installed:" => ["jboss.naming.context.java.jboss.datasources.ExampleDS"],
    "WFLYCTL0180: Services with missing/unavailable dependencies" => ["jboss.naming.context.java.module.auth.auth.DefaultDataSource is missing [jboss.naming.context.java.jboss.datasources.ExampleDS]"]
}

So I fixed that...and was failing to connect to the database, because my database wasn't listening on the address it used.

Caused by: org.postgresql.util.PSQLException: Connection to <host_goes_here>:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

Reconfiguring PostgreSQL fixed that:

/etc/postgresql/12/main/postgresql.conf

listen_addresses = '*'

/etc/postgresql/12/main/pg_hba.conf

host    keycloak    keycloak     <ip_goes_here>/32    <method_goes_here>

And FYI other than looking at config, you can use things like this to see what it listens to:

lsof -Pni | grep java
ss -ltp | grep java
netstat -lantp | grep java