> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/galera-cluster/reference/wsrep-variable-details/socket.ssl_cert.md).

# socket.ssl\_cert

## Overview <a href="#overview_h2" id="overview_h2"></a>

Defines the path to the SSL certificate.

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\_cert `wsrep_provider_options`.

## Details

The node presents this certificate to its peers when encrypting replication traffic over TLS. You can use either an absolute path or one relative to the working directory. The file must use PEM format.

Starting with Galera wsrep provider 26.4.8, the file can contain a complete certificate chain: the node's own (leaf) certificate first, followed by any intermediate CA certificates. Earlier provider versions load only the first certificate in the file, so with older providers any intermediate CA certificates must instead be included in each peer's [socket.ssl\_ca](/docs/galera-cluster/reference/wsrep-variable-details/socket.ssl_ca.md) file.

| Option Name   | socket.ssl\_cert       |
| ------------- | ---------------------- |
| Default Value | "" *(an empty string)* |
| 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:

```sql
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_cert=/path/to/server-cert.pem;gcache.debug=YES;gcs.fc_limit=NO;socket.send_buf_size=NO;evs.keepalive_period=PT3S'
```

### Set Dynamically

The socket.ssl\_cert 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:

```sql
ERROR 1210 (HY000): Incorrect arguments to SET
```

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