socket.ssl

The socket.ssl wsrep_provider_options entry enables TLS encryption for Galera Cluster replication traffic; it defaults to NO and cannot be changed dynamically.

Overview

Explicitly enables TLS usage by the wsrep provider.

The wsrep_provider_options system variable applies to MariaDB Enterprise Cluster, powered by Galera and to Galera Cluster available with MariaDB Community Server. This page relates specifically to the socket.ssl wsrep_provider_options.

Details

The socket.ssl option is used to specify if SSL encryption should be used.

Option Name	socket.ssl
Default Value	NO
Dynamic	NO
Debug	NO

Examples

Display Current Value

wsrep_provider_options define optional settings the node passes to the wsrep provider.

To display current wsrep_provider_options values:

SHOW GLOBAL VARIABLES LIKE 'wsrep_provider_options';

The expected output will display the option and the value. Options with no default value, for example SSL options, will not be displayed in the output.

Set in Configuration File

When changing a setting for a wsrep_provider_options in the config file, you must list EVERY option that is to have a value other than the default value. Options that are not explicitly listed are reset to the default value.

Options are set in the my.cnf configuration file. Use the ; delimiter to set multiple options.

The configuration file must be updated on each node. A restart to each node is needed for changes to take effect.

Use a quoted string that includes every option where you want to override the default value. Options that are not in the list will reset to their default value.

To set the option in the configuration file:

wsrep_provider_options='socket.ssl=YES;gcache.debug=YES;gcs.fc_limit=NO;socket.send_buf_size=NO;evs.keepalive_period=PT3S'

Set Dynamically

The socket.ssl option cannot be set dynamically. It can only be set in the configuration file.

Trying to change a non-dynamic option with SET results in an error:

ERROR 1210 (HY000): Incorrect arguments to SET