Select which SSL implementation is used for wsrep provider communications: PROVIDER - wsrep provider internal SSL implementation; SERVER - use server side SSL implementation; SERVER_X509 - as SERVER and require valid X509 certificate.
The wsrep_ssl_mode system variable is used to configure the WSREP TLS Mode used by MariaDB Enterprise Cluster, powered by Galera.
When set to SERVER or SERVER_X509, MariaDB Enterprise Cluster uses the TLS configuration for MariaDB Enterprise Server:
When set to PROVIDER, MariaDB Enterprise Cluster obtains its TLS configuration from the system variable:
The wsrep_ssl_mode system variable configures the WSREP TLS Mode. The following WSREP TLS Modes are supported:
When the wsrep_ssl_mode system variable is set to PROVIDER, each node obtains its TLS configuration from the system variable. The following options are used:
When the wsrep_ssl_mode system variable is set to SERVER or SERVER_X509, each node obtains its TLS configuration from the node's MariaDB Enterprise Server configuration. The following system variables are used:
WSREP TLS Mode
Values
Description
Provider
PROVIDER
TLS is optional for Enterprise Cluster replication traffic.
Each node obtains its TLS configuration from the wsrep_provider_options system variable. When the provider is not configured to use TLS on a node, the node will connect to the cluster without TLS.
The Provider WSREP TLS Mode is backward compatible with ES 10.5 and earlier. When performing a rolling upgrade from ES 10.5 and earlier, the Provider WSREP TLS Mode can be configured on the upgraded nodes.
Server
SERVER
TLS is mandatory for Enterprise Cluster replication traffic, but X509 certificate verification is not performed.
Each node obtains its TLS configuration from the node's MariaDB Enterprise Server configuration. When MariaDB Enterprise Server is not configured to use TLS on a node, the node will fail to connect to the cluster.
The Server WSREP TLS Mode is the default in ES 10.6.
Server X509
SERVER_X509
TLS and X509 certificate verification are mandatory for Enterprise Cluster replication traffic.
Each node obtains its TLS configuration from the node's MariaDB Enterprise Server configuration. When MariaDB Enterprise Server is not configured to use TLS on a node, the node will fail to connect to the cluster.
WSREP Provider Option
Description
Set this option to true to enable TLS.
Set this option to the path of the CA chain file.
Set this option to the path of the node's X509 certificate file.
Set this option to the path of the node's private key file.
System Variable
Description
Set this system variables to the path of the CA chain file.
Optionally set this system variables to the path of the CA chain directory. The directory must have been processed by openssl rehash. When your CA chain is stored in a single file, use the ssl_ca system variable instead.
Set this system variable to the path of the node's X509 certificate file.
Set this system variable to the path of the node's private key file.
Command-line
--wsrep_ssl_mode={PROVIDER|SERVER|SERVER_X509}
Configuration file
Supported
Dynamic
No
Scope
Global
Data Type
ENUM (PROVIDER, SERVER, SERVER_X509)
Product Default Value
SERVER
[mariadb]
...
wsrep_ssl_mode = SERVER_X509
ssl_ca = /certs/ca-cert.pem
ssl_cert = /certs/server-cert.pem
ssl_key = /certs/server-key.pem[mariadb]
...
wsrep_ssl_mode = PROVIDER
wsrep_provider_options = "socket.ssl=true;socket.ssl_cert=/certs/server-cert.pem;socket.ssl_ca=/certs/ca-cert.pem;socket.ssl_key=/certs/server-key.pem"