[[_tomcat_adapter]]
==== Tomcat 7, 8 and 9 Adapters

To be able to secure WAR apps deployed on Tomcat 7, 8 and 9 you must install the Keycloak Tomcat 7 adapter or Keycloak Tomcat adapter into your Tomcat installation.
You then have to provide some extra configuration in each WAR you deploy to Tomcat.
Let's go over these steps. 

[[_tomcat_adapter_installation]]
===== Adapter Installation

Adapters are no longer included with the appliance or war distribution.
Each adapter is a separate download on the Keycloak download site.
They are also available as a maven artifact. 

You must unzip the adapter distro into Tomcat's `lib/` directory.
Including adapter's jars within your WEB-INF/lib directory will not work!  The Keycloak adapter is implemented as a Valve and valve code must reside in Tomcat's main lib/ directory. 

Install on Tomcat 7:

[source]
----

$ cd $TOMCAT_HOME/lib
$ unzip keycloak-tomcat7-adapter-dist.zip
----    

Install on Tomcat 8 or 9:

[source]
----

$ cd $TOMCAT_HOME/lib
$ unzip keycloak-tomcat-adapter-dist.zip
----    

===== Required Per WAR Configuration

This section describes how to secure a WAR directly by adding config and editing files within your WAR package. 

The first thing you must do is create a `META-INF/context.xml` file in your WAR package.
This is a Tomcat specific config file and you must define a Keycloak specific Valve. 

[source]
----


<Context path="/your-context-path">
    <Valve className="org.keycloak.adapters.tomcat.KeycloakAuthenticatorValve"/>
</Context>
----

Next you must create a `keycloak.json` adapter config file within the `WEB-INF` directory of your WAR.

The format of this config file is described in the <<_java_adapter_config,Java adapter configuration>>           

Finally you must specify both a `login-config` and use standard servlet security to specify role-base constraints on your URLs.
Here's an example: 


[source,xml]
----


<web-app xmlns="http://java.sun.com/xml/ns/javaee"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
      version="3.0">

	<module-name>customer-portal</module-name>

    <security-constraint>
        <web-resource-collection>
            <web-resource-name>Customers</web-resource-name>
            <url-pattern>/*</url-pattern>
        </web-resource-collection>
        <auth-constraint>
            <role-name>user</role-name>
        </auth-constraint>
    </security-constraint>

    <login-config>
        <auth-method>BASIC</auth-method>
        <realm-name>this is ignored currently</realm-name>
    </login-config>

    <security-role>
        <role-name>admin</role-name>
    </security-role>
    <security-role>
        <role-name>user</role-name>
    </security-role>
</web-app>
----