Scenarios

When the secure Flink cluster is required, SSL-related configuration items must be set.

Configuration Description

Configuration items include the SSL switch, certificate, password, and encryption algorithm.

For versions earlier than MRS 3.x, see Table 1.

**Table 1** Parameters
Parameter	Mandatory	Default Value	Description
security.ssl.internal.enabled	Yes	The value is automatically configured according to the cluster installation mode. Security mode: The default value is true. Normal mode: The default value is false.	Main switch of internal communication SSL.
security.ssl.internal.keystore	Yes	-	Java keystore file.
security.ssl.internal.keystore-password	Yes	-	Password used to decrypt the keystore file.
security.ssl.internal.key-password	Yes	-	Password used to decrypt the server key in the keystore file.
security.ssl.internal.truststore	Yes	-	truststore file containing the public CA certificates.
security.ssl.internal.truststore-password	Yes	-	Password used to decrypt the truststore file.
security.ssl.protocol	Yes	TLSv1.2	SSL transmission protocol version
security.ssl.algorithms	Yes	The default value is TLS_RSA_WITH_AES_128_CBC_SHA256,TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,TLS_DHE_DSS_WITH_AES_128_CBC_SHA256.	Supported SSL standard algorithm. For details, see the Java official website.
security.ssl.rest.enabled	Yes	The value is automatically configured according to the cluster installation mode. Security mode: The default value is true. Normal mode: The default value is false.	Main switch of external communication SSL.
security.ssl.rest.keystore	Yes	-	Java keystore file.
security.ssl.rest.keystore-password	Yes	-	Password used to decrypt the keystore file.
security.ssl.rest.key-password	Yes	-	Password used to decrypt the server key in the keystore file.
security.ssl.rest.truststore	Yes	-	truststore file containing the public CA certificates.
security.ssl.rest.truststore-password	Yes	-	Password used to decrypt the truststore file.

For configuration items for MRS 3.x or later, see Table 2.

**Table 2** Parameters
Parameter	Description	Default Value	Mandatory
security.ssl.enabled	Main switch of internal communication SSL.	The value is automatically configured according to the cluster installation mode. Security mode: The default value is true. Non-security mode: The default value is false.	Yes
security.ssl.keystore	Java keystore file.	-	Yes
security.ssl.keystore-password	Password used to decrypt the keystore file.	-	Yes
security.ssl.key-password	Password used to decrypt the server key in the keystore file.	-	Yes
security.ssl.truststore	truststore file containing the public CA certificates.	-	Yes
security.ssl.truststore-password	Password used to decrypt the truststore file.	-	Yes
security.ssl.protocol	SSL transmission protocol version.	TLSv1.2	Yes
security.ssl.algorithms	Supported SSL standard algorithm. For details, see the Java official website.	The default value: "TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384"	Yes