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See Section 18.6.2, “Securing Group Communication Connections with Secure Socket Layer (SSL)”  for information on configuring SSL for group communication. 

• group_replication_start_on_boot 

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The value of this system variable can be changed while Group Replication is running, but the change only takes effect after you stop and restart Group Replication on the group member. 

group_replication_start_on_boot  specifies whether the server should start Group Replication automatically ( ON ) or not ( OFF ) during server start. When you set this option to ON , Group Replication restarts automatically after a remote cloning operation is used for distributed recovery. 

To start Group Replication automatically during server start, the user credentials for distributed recovery must be stored in the replication metadata repositories on the server using the CHANGE REPLICATION SOURCE TO  | CHANGE MASTER TO  statement. If you prefer to specify the user credentials on the START GROUP_REPLICATION  statement, which stores the user credentials only in memory, ensure that group_replication_start_on_boot  is set to OFF . 

• group_replication_tls_source 

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The value of this system variable can be changed while Group Replication is running, but the change only takes effect after you stop and restart Group Replication on the group member. 

