74 lines
3.8 KiB
Text
74 lines
3.8 KiB
Text
==== Logout
|
|
|
|
There are multiple ways you can logout from a web application.
|
|
For Java EE servlet containers, you can call `HttpServletRequest.logout()`. For any other browser application, you can point
|
|
the browser at any url of your web application that has a security constraint and pass in a query parameter GLO, i.e. `$$http://myapp?GLO=true$$`.
|
|
This will log you out if you have an SSO session with your browser.
|
|
|
|
[[_saml_logout_in_cluster]]
|
|
===== Logout in Clustered Environment
|
|
|
|
Internally, the SAML adapter stores a mapping between the SAML session index, principal name (when known), and HTTP session ID.
|
|
This mapping can be maintained in JBoss application server family (WildFly 10/11, EAP 6/7) across cluster for distributable
|
|
applications. As a precondition, the HTTP sessions need to be distributed across cluster (i.e. application is marked with
|
|
`<distributable/>` tag in application's `web.xml`).
|
|
|
|
To enable the functionality, add the following section to your `/WEB_INF/web.xml` file:
|
|
|
|
For EAP 7, WildFly 10/11:
|
|
|
|
[source,xml]
|
|
----
|
|
<context-param>
|
|
<param-name>keycloak.sessionIdMapperUpdater.classes</param-name>
|
|
<param-value>org.keycloak.adapters.saml.wildfly.infinispan.InfinispanSessionCacheIdMapperUpdater</param-value>
|
|
</context-param>
|
|
----
|
|
|
|
For EAP 6:
|
|
|
|
[source,xml]
|
|
----
|
|
<context-param>
|
|
<param-name>keycloak.sessionIdMapperUpdater.classes</param-name>
|
|
<param-value>org.keycloak.adapters.saml.jbossweb.infinispan.InfinispanSessionCacheIdMapperUpdater</param-value>
|
|
</context-param>
|
|
----
|
|
|
|
If the session cache of the deployment is named `_deployment-cache_`, the cache used for SAML mapping will be named
|
|
as `_deployment-cache_.ssoCache`. The name of the cache can be overridden by a context parameter
|
|
`keycloak.sessionIdMapperUpdater.infinispan.cacheName`. The cache container containing the cache will be the same as
|
|
the one containing the deployment session cache, but can be overridden by a context parameter
|
|
`keycloak.sessionIdMapperUpdater.infinispan.containerName`.
|
|
|
|
By default, the configuration of the SAML mapping cache will be derived from session cache. The configuration can
|
|
be manually overridden in cache configuration section of the server just the same as other caches.
|
|
|
|
Currently, to provide reliable service, it is recommended to use replicated cache for the SAML session cache.
|
|
Using distributed cache may lead to results where the SAML logout request would land to a node with no access
|
|
to SAML session index to HTTP session mapping which would lead to unsuccessful logout.
|
|
|
|
[[_saml_logout_in_cross_dc]]
|
|
===== Logout in Cross DC Scenario
|
|
|
|
The cross DC scenario only applies to WildFly 10 and higher, and EAP 7 and higher.
|
|
|
|
Special handling is needed for handling sessions that span multiple data centers. Imagine the following scenario:
|
|
|
|
1. Login requests are handled within cluster in data center 1.
|
|
|
|
2. Admin issues logout request for a particular SAML session, the request lands in data center 2.
|
|
|
|
The data center 2 has to log out all sessions that are present in data center 1 (and all other data centers that
|
|
share HTTP sessions).
|
|
|
|
To cover this case, the SAML session cache described <<_saml_logout_in_cluster,above>> needs to be replicated
|
|
not only within individual clusters but across all the data centers e.g.
|
|
https://access.redhat.com/documentation/en-us/red_hat_data_grid/6.6/html/administration_and_configuration_guide/chap-externalize_sessions#Externalize_HTTP_Session_from_JBoss_EAP_6.x_to_JBoss_Data_Grid[via standalone Infinispan/JDG server]:
|
|
|
|
1. A cache has to be added to the standalone Infinispan/JDG server.
|
|
|
|
2. The cache from previous item has to be added as a remote store for the respective SAML session cache.
|
|
|
|
Once remote store is found to be present on SAML session cache during deployment, it is watched for changes
|
|
and the local SAML session cache is updated accordingly.
|