Apache Ignite Ticket Registry

Apache Ignite integration is enabled by including the following dependency in the WAR overlay:

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<dependency>
    <groupId>org.apereo.cas</groupId>
    <artifactId>cas-server-support-ignite-ticket-registry</artifactId>
    <version>${cas.version}</version>
</dependency>
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implementation "org.apereo.cas:cas-server-support-ignite-ticket-registry:${project.'cas.version'}"
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dependencyManagement {
    imports {
        mavenBom "org.apereo.cas:cas-server-support-bom:${project.'cas.version'}"
    }
}

dependencies {
    implementation "org.apereo.cas:cas-server-support-ignite-ticket-registry"
}
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dependencies {
    /*
        The following platform references are included automatically and are listed for reference only.

        implementation enforcedPlatform("org.apereo.cas:cas-server-support-bom:${project.'cas.version'}")
        implementation platform(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES)
        
    */
    implementation "org.apereo.cas:cas-server-support-ignite-ticket-registry"
}

This registry stores tickets in an Apache Ignite instance.

Distributed Cache

Distributed caches are recommended for HA architectures since they offer fault tolerance in the ticket storage subsystem.

TLS Replication

Apache Ignite supports replication over TLS for distributed caches composed of two or more nodes. To learn more about TLS replication with Ignite, see this resource.

Configuration

The following settings and properties are available from the CAS configuration catalog:

cas.ticket.registry.ignite.crypto.encryption.keyThe encryption key.
no default
Required

The encryption key. The encryption key by default and unless specified otherwise must be randomly-generated string whose length is defined by the encryption key size setting.

Type
String
Default
none
Defined by
EncryptionRandomizedCryptoProperties
cas.ticket.registry.ignite.crypto.signing.keyThe signing key is a string whose length is defined by the signing key size setting.
no default
RequiredSpEL

The signing key is a string whose length is defined by the signing key size setting.

Type
String
Default
none
Defined by
SigningJwtCryptoProperties
Supports
Spring Expression Language
cas.ticket.registry.ignite.ignite-serversA comma-separated list of address:port pairs representing the entry points for the cluster discovery.
no default
Required

A comma-separated list of address:port pairs representing the entry points for the cluster discovery.

This maps to the netClusterNodes configuration in the Node Finder. When this node starts, it will attempt to contact these addresses to find existing peers and join the topology.

Type
List<String>
Default
none
Defined by
IgniteProperties
cas.ticket.registry.ignite.cluster-nameThe human-readable logical name of the cluster.
cas-ignite-cluster

The human-readable logical name of the cluster.

This value is passed to the cluster builder during the initialization phase (see #initializeCluster). It serves as the identifier for the cluster topology management group (CMG).

Note: This is only strictly required if #initializeCluster is true, as joining nodes will inherit the cluster name from the active topology.

Type
String
Default
cas-ignite-cluster
Defined by
IgniteProperties
cas.ticket.registry.ignite.crypto.algThe signing/encryption algorithm to use.
AES

The signing/encryption algorithm to use.

Type
String
Default
AES
Defined by
EncryptionRandomizedSigningJwtCryptographyProperties
cas.ticket.registry.ignite.crypto.enabledWhether crypto operations are enabled.
true

Whether crypto operations are enabled.

Type
Boolean
Default
true
Defined by
EncryptionRandomizedSigningJwtCryptographyProperties
cas.ticket.registry.ignite.crypto.encryption.key-sizeEncryption key size.
16

Encryption key size.

Type
Integer
Default
16
Defined by
EncryptionRandomizedCryptoProperties
cas.ticket.registry.ignite.crypto.signing-enabledWhether signing encryption operations are enabled.
true

Whether signing encryption operations are enabled.

Type
Boolean
Default
true
Defined by
EncryptionRandomizedSigningJwtCryptographyProperties
cas.ticket.registry.ignite.crypto.signing.key-sizeThe signing key size.
512

The signing key size.

Type
Integer
Default
512
Defined by
SigningJwtCryptoProperties
cas.ticket.registry.ignite.initialize-clusterA flag indicating whether this specific node instance should attempt to initialize the cluster topology upon startup.
true

A flag indicating whether this specific node instance should attempt to initialize the cluster topology upon startup.

A cluster is not operational until initializeCluster is set to true once. This flag should be true for only one node ("Leader" node) during the initial deployment.

Type
Boolean
Default
true
Defined by
IgniteProperties
cas.ticket.registry.ignite.node-nameThe unique identifier for this specific Ignite node instance.
no default

The unique identifier for this specific Ignite node instance.

This name is used for:
  • Log identification
  • Consistent Hashing (topology placement)
  • Raft voting identity
  • MetaStorage leadership election
Requirement: This must be unique across all nodes in the cluster. Duplicate names will result in the node being rejected during the join phase.
Type
String
Default
none
Defined by
IgniteProperties
cas.ticket.registry.ignite.portThe local network port that this Ignite node will bind to and listen on.
47500

The local network port that this Ignite node will bind to and listen on. This is a unified port used for both node discovery and data communication. If you are running multiple nodes on the same physical machine (or the same container network), each node must have a unique port to avoid BindException.

Type
Integer
Default
47500
Defined by
IgniteProperties

Required settings may be needed to activate or affect the feature; review them even when they have a default. Optional settings only need to be set to change a default or to turn on the behavior they control. Third party settings belong to libraries such as Spring Boot that CAS builds on; their own documentation may have more detail.

Signing & encryption

This CAS feature is able to accept signing and encryption crypto keys. In most scenarios if keys are not provided, CAS will auto-generate them. The following instructions apply if you wish to manually and beforehand create the signing and encryption keys.

Note that if you are asked to create a JWK of a certain size for the key, you are to use the following set of commands to generate the token:

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wget https://raw.githubusercontent.com/apereo/cas/master/etc/jwk-gen.jar
java -jar jwk-gen.jar -t oct -s [size]

The outcome would be similar to:

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{
  "kty": "oct",
  "kid": "...",
  "k": "..."
}

The generated value for k needs to be assigned to the relevant CAS settings. Note that keys generated via the above algorithm are processed by CAS using the Advanced Encryption Standard (AES) algorithm which is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology.


Notes on configuration

Configuration Metadata

The collection of configuration properties listed in this section are automatically generated from the CAS source and components that contain the actual field definitions, types, descriptions, modules, etc. This metadata may not always be 100% accurate, or could be lacking details and sufficient explanations.

Be Selective

This section is meant as a guide only. Do NOT copy/paste the entire collection of settings into your CAS configuration; rather pick only the properties that you need. Do NOT enable settings unless you are certain of their purpose and do NOT copy settings into your configuration only to keep them as reference. All these ideas lead to upgrade headaches, maintenance nightmares and premature aging.

YAGNI

Note that for nearly ALL use cases, declaring and configuring properties listed here is sufficient. You should NOT have to explicitly massage a CAS XML/Java/etc configuration file to design an authentication handler, create attribute release policies, etc. CAS at runtime will auto-configure all required changes for you. If you are unsure about the meaning of a given CAS setting, do NOT turn it on without hesitation. Review the codebase or better yet, ask questions to clarify the intended behavior.

Naming Convention

Property names can be specified in very relaxed terms. For instance cas.someProperty, cas.some-property, cas.some_property are all valid names. While all forms are accepted by CAS, there are certain components (in CAS and other frameworks used) whose activation at runtime is conditional on a property value, where this property is required to have been specified in CAS configuration using kebab case. This is both true for properties that are owned by CAS as well as those that might be presented to the system via an external library or framework such as Spring Boot, etc.

:information_source: Note

When possible, properties should be stored in lower-case kebab format, such as cas.property-name=value. The only possible exception to this rule is when naming actuator endpoints; The name of the actuator endpoints (i.e. ssoSessions) MUST remain in camelCase mode.

Settings and properties that are controlled by the CAS platform directly always begin with the prefix cas. All other settings are controlled and provided to CAS via other underlying frameworks and may have their own schemas and syntax. BE CAREFUL with the distinction. Unrecognized properties are rejected by CAS and/or frameworks upon which CAS depends. This means if you somehow misspell a property definition or fail to adhere to the dot-notation syntax and such, your setting is entirely refused by CAS and likely the feature it controls will never be activated in the way you intend.

Validation

Configuration properties are automatically validated on CAS startup to report issues with configuration binding, especially if defined CAS settings cannot be recognized or validated by the configuration schema. Additional validation processes are also handled via Configuration Metadata and property migrations applied automatically on startup by Spring Boot and family.

Indexed Settings

CAS settings able to accept multiple values are typically documented with an index, such as cas.some.setting[0]=value. The index [0] is meant to be incremented by the adopter to allow for distinct multiple configuration blocks.

Troubleshooting

  • You will need to ensure that network communication across CAS nodes is allowed and no firewall or other component is blocking traffic.
  • If nodes external to CAS instances are utilized, ensure that each cache manager specifies a name that matches the Apache Ignite configuration itself.
  • You may also need to adjust your expiration policy to allow for a larger time span, especially for service tickets depending on network traffic and communication delay across CAS nodes particularly in the event that a node is trying to join the cluster.