CAS LDAP failover

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Josep Manel Andrés

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Apr 8, 2016, 7:17:04 AM4/8/16
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Hi,
I've got two LDAP servers acting as slave, so far I have set up CAS
server to connect to only one of those servers, but before going on
production I would like to add another server to the pool, but I am not
sure whether it's ok to just add another server to this entry in
cas.properties file


#========================================
# General properties
#========================================
ldap.url=ldaps://ldap1.domain.com

Or on the other hand I should add something to my deployerConfigContext.xml
In that case what are the entries that I should add?

ldapAuthenticationHandler?


Thanks.


<?xml version="1.0" encoding="UTF-8"?>
<!--

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software distributed under the License is distributed on an
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KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.

-->
<!--
| deployerConfigContext.xml centralizes into one file some of the
declarative configuration that
| all CAS deployers will need to modify.
|
| This file declares some of the Spring-managed JavaBeans that make up a
CAS deployment.
| The beans declared in this file are instantiated at context
initialization time by the Spring
| ContextLoaderListener declared in web.xml. It finds this file because
this
| file is among those declared in the context parameter
"contextConfigLocation".
|
| By far the most common change you will need to make in this file is to
change the last bean
| declaration to replace the default authentication handler with
| one implementing your approach for authenticating usernames and passwords.
+-->

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:sec="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util.xsd">

<!--
| The authentication manager defines security policy for
authentication by specifying at a minimum
| the authentication handlers that will be used to authenticate
credential. While the AuthenticationManager
| interface supports plugging in another implementation, the
default PolicyBasedAuthenticationManager should
| be sufficient in most cases.
+-->
<bean id="authenticationManager"
class="org.jasig.cas.authentication.PolicyBasedAuthenticationManager">
<constructor-arg>
<map>
<!--
| IMPORTANT
| Every handler requires a unique name.
| If more than one instance of the same handler
class is configured, you must explicitly
| set its name to something other than its default
name (typically the simple class name).
-->
<entry key-ref="proxyAuthenticationHandler"
value-ref="proxyPrincipalResolver" />
<entry key-ref="ldapAuthenticationHandler"
value-ref="primaryPrincipalResolver" />
</map>
</constructor-arg>

<!-- Uncomment the metadata populator to capture the password.
<property name="authenticationMetaDataPopulators">
<util:list>
<bean
class="org.jasig.cas.authentication.CacheCredentialsMetaDataPopulator"/>
</util:list>
</property>
-->

<!--
| Defines the security policy around authentication. Some
alternative policies that ship with CAS:
|
| * NotPreventedAuthenticationPolicy - all credential must
either pass or fail authentication
| * AllAuthenticationPolicy - all presented credential must
be authenticated successfully
| * RequiredHandlerAuthenticationPolicy - specifies a
handler that must authenticate its credential to pass
Default estava p:principalIdAttribute="cn"
-->
<property name="authenticationPolicy">
<bean
class="org.jasig.cas.authentication.AnyAuthenticationPolicy" />
</property>
</bean>

<bean id="ldapAuthenticationHandler"
class="org.jasig.cas.authentication.LdapAuthenticationHandler"
p:principalIdAttribute="uid"
c:authenticator-ref="authenticator">
<property name="principalAttributeMap">
<map>
<!--
| This map provides a simple attribute resolution
mechanism.
| Keys are LDAP attribute names, values are CAS
attribute names.
| Use this facility instead of a PrincipalResolver
if LDAP is
| the only attribute source.
-->
<entry key="uid" value="uid" />
<entry key="member" value="member"/>
<entry key="mail" value="mail"/>
<entry key="displayName" value="displayName"/>
</map>
</property>
</bean>
<bean id="authenticator" class="org.ldaptive.auth.Authenticator"
c:resolver-ref="dnResolver"
c:handler-ref="authHandler"/>

<!--
| The following DN format works for many directories, but may
need to be
| customized. Canviem cn per uid 4 línies més avall
-->
<bean id="dnResolver"
class="org.ldaptive.auth.FormatDnResolver"
c:format="uid=%s,${ldap.authn.baseDn}"/>

<bean id="authHandler"
class="org.ldaptive.auth.PooledBindAuthenticationHandler"
p:connectionFactory-ref="pooledLdapConnectionFactory"/>

<bean id="pooledLdapConnectionFactory"
class="org.ldaptive.pool.PooledConnectionFactory"
p:connectionPool-ref="connectionPool"/>

<bean id="connectionPool"
class="org.ldaptive.pool.BlockingConnectionPool"
init-method="initialize"
p:poolConfig-ref="ldapPoolConfig"
p:blockWaitTime="${ldap.pool.blockWaitTime}"
p:validator-ref="searchValidator"
p:pruneStrategy-ref="pruneStrategy"
p:connectionFactory-ref="connectionFactory"/>

<bean id="ldapPoolConfig" class="org.ldaptive.pool.PoolConfig"
p:minPoolSize="${ldap.pool.minSize}"
p:maxPoolSize="${ldap.pool.maxSize}"
p:validateOnCheckOut="${ldap.pool.validateOnCheckout}"
p:validatePeriodically="${ldap.pool.validatePeriodically}"
p:validatePeriod="${ldap.pool.validatePeriod}"/>

<bean id="connectionFactory"
class="org.ldaptive.DefaultConnectionFactory"
p:connectionConfig-ref="connectionConfig"/>

<bean id="connectionConfig" class="org.ldaptive.ConnectionConfig"
p:ldapUrl="${ldap.url}"
p:connectTimeout="${ldap.connectTimeout}"
p:useStartTLS="${ldap.useStartTLS}"
p:sslConfig-ref="sslConfig"/>

<bean id="sslConfig" class="org.ldaptive.ssl.SslConfig">
<property name="credentialConfig">
<bean class="org.ldaptive.ssl.X509CredentialConfig"
p:trustCertificates="${ldap.trustedCert}"/>
</property>
</bean>

<bean id="pruneStrategy" class="org.ldaptive.pool.IdlePruneStrategy"
p:prunePeriod="${ldap.pool.prunePeriod}"
p:idleTime="${ldap.pool.idleTime}"/>

<bean id="searchValidator" class="org.ldaptive.pool.SearchValidator"/>
<!-- Required for proxy ticket mechanism. -->
<bean id="proxyAuthenticationHandler"

class="org.jasig.cas.authentication.handler.support.HttpBasedServiceCredentialsAuthenticationHandler"
p:httpClient-ref="supportsTrustStoreSslSocketFactoryHttpClient"/>

<!--
| TODO: Replace this component with one suitable for your
enviroment.
|
| This component provides authentication for the kind of
credential used in your environment. In most cases
| credential is a username/password pair that lives in a system
of record like an LDAP directory.
| The most common authentication handler beans:
|
| * org.jasig.cas.authentication.LdapAuthenticationHandler
| * org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler
| *
org.jasig.cas.adaptors.x509.authentication.handler.support.X509CredentialsAuthenticationHandler
| *
org.jasig.cas.support.spnego.authentication.handler.support.JCIFSSpnegoAuthenticationHandler
-->
<!-- <bean id="primaryAuthenticationHandler"

class="org.jasig.cas.authentication.AcceptUsersAuthenticationHandler">
<property name="users">
<map>
<entry key="casuser" value="Mellon"/>
</map>
</property>
</bean>
-->

<!-- Required for proxy ticket mechanism -->
<bean id="proxyPrincipalResolver"

class="org.jasig.cas.authentication.principal.BasicPrincipalResolver" />
<!--
| Resolves a principal from a credential using an attribute
repository that is configured to resolve
| against a deployer-specific store (e.g. LDAP).
-->
<bean id="primaryPrincipalResolver"

class="org.jasig.cas.authentication.principal.PersonDirectoryPrincipalResolver"
p:principalFactory-ref="principalFactory"
p:attributeRepository-ref="attributeRepository" />

<!--
Bean that defines the attributes that a service may return. This
example uses the Stub/Mock version. A real implementation
may go against a database or LDAP server. The id should remain
"attributeRepository" though.
+-->
<bean id="attributeRepository"
class="org.jasig.services.persondir.support.NamedStubPersonAttributeDao"
p:backingMap-ref="attrRepoBackingMap" />

<util:map id="attrRepoBackingMap">
<entry key="uid" value="uid" />
<entry key="eduPersonAffiliation" value="eduPersonAffiliation" />
<entry key="groupMembership" value="groupMembership" />
<entry>
<key><value>memberOf</value></key>
<list>
<value>faculty</value>
<value>staff</value>
<value>org</value>
</list>
</entry>
</util:map>

<bean id="serviceRegistryDao"
class="org.jasig.cas.services.JsonServiceRegistryDao"

c:configDirectory="${service.registry.config.location:classpath:services}"
/>

<bean id="auditTrailManager"
class="org.jasig.inspektr.audit.support.Slf4jLoggingAuditTrailManager" />

<bean id="healthCheckMonitor"
class="org.jasig.cas.monitor.HealthCheckMonitor"
p:monitors-ref="monitorsList" />

<util:list id="monitorsList">
<bean class="org.jasig.cas.monitor.MemoryMonitor"
p:freeMemoryWarnThreshold="10" />
<!--
NOTE
The following ticket registries support SessionMonitor:
* DefaultTicketRegistry
* JpaTicketRegistry
Remove this monitor if you use an unsupported registry.
-->
<bean class="org.jasig.cas.monitor.SessionMonitor"
p:ticketRegistry-ref="ticketRegistry"
p:serviceTicketCountWarnThreshold="5000"
p:sessionCountWarnThreshold="100000" />
</util:list>
</beans>

--
Josep Manel Andrés (josep....@bsc.es)
Operations - Barcelona Supercomputing Center
C/ Jordi Girona, 31 http://www.bsc.es
08034 Barcelona, Spain Tel: +34-93-405 42 14
e-mail: sys...@bsc.es Fax: +34-93-413 77 21
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Jérôme Nenert

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Apr 8, 2016, 7:24:22 AM4/8/16
to cas-...@apereo.org
You just have to add your other ldap slave servers to cas.properties :

#========================================
# General properties
#========================================
ldap.url=ldaps://ldap1.domain.com ldaps://ldap2.domain.com
ldaps://ldap3.domain.com

You will have to add/modify something on deployerConfigContext.xml if
you want to customize your ldap pool ( see :
http://www.ldaptive.org/docs/guide/connections/pooling.html )

Josep Manel Andrés <josep....@bsc.es> a écrit :
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