The mysqldump command in MySQL is used to create backups of MySQL databases. One of the options available is --ssl-session-data=name, which allows specifying a file containing SSL session data to be used during the dump process. This option is particularly useful when dealing with secure connections that require SSL certificates for authentication and encryption.
Here are several examples demonstrating the usage of --ssl-session-data=name in mysqldump:
Example 1: Dumping a database with SSL session data file
mysqldump --ssl-session-data=session_data.txt -u username -p database_name > backup.sql
This command dumps the database database_name to backup.sql using SSL session data from session_data.txt.
Example 2: Dumping all databases with SSL session data
mysqldump --ssl-session-data=/path/to/session_data.txt -u username -p --all-databases > all_databases_backup.sql
This command dumps all databases to all_databases_backup.sql using SSL session data from /path/to/session_data.txt.
Example 3: Dumping a specific table with SSL session data
mysqldump --ssl-session-data=ssl_data.txt -u username -p database_name table_name > table_backup.sql
This command dumps only table_name from database_name to table_backup.sql using SSL session data from ssl_data.txt.
Example 4: Using relative path for SSL session data
mysqldump --ssl-session-data=./ssl/session_data.txt -u username -p database_name > backup.sql
This command dumps database_name to backup.sql using SSL session data from ./ssl/session_data.txt.
Example 5: Dumping with session data and specifying SSL options
mysqldump --ssl-session-data=ssl_data.txt --ssl-ca=ca-cert.pem --ssl-cert=client-cert.pem --ssl-key=client-key.pem -u username -p database_name > backup.sql
This command dumps database_name to backup.sql using SSL session data from ssl_data.txt and additional SSL certificate files.
Example 6: Verifying SSL session data usage
To verify that SSL session data is being used during the dump process, check the output for any SSL-related messages or consult the MySQL server logs for SSL session establishment details.
Example 7: Invalid SSL session data file
mysqldump --ssl-session-data=invalid_data.txt -u username -p database_name > backup.sql
This command attempts to use an invalid SSL session data file, which will likely result in an error message such as “ERROR 2026 (HY000): SSL connection error: error:140DC009:SSL routines:use_certificate_chain_file:PEM lib“.
Example 8: Missing SSL session data file
mysqldump --ssl-session-data=missing_data.txt -u username -p database_name > backup.sql
This command tries to use a non-existent SSL session data file, resulting in an error like “ERROR 2026 (HY000): SSL connection error: error:02001002:system library:fopen:No such file or directory“.
Example 9: Using environment variables for session data
mysqldump --ssl-session-data=$SSL_SESSION_FILE -u username -p database_name > backup.sql
Assuming $SSL_SESSION_FILE is set in the environment, this command uses SSL session data defined by the variable.
Example 10: Dumping with default SSL session data
mysqldump --ssl-session-data=default -u username -p database_name > backup.sql
This command attempts to use default SSL session data configuration, depending on MySQL server settings and SSL defaults.
To verify whether the mysqldump command executed successfully with SSL session data, check the generated backup file (.sql) for database content and ensure no SSL-related errors are reported during the dump process. Additionally, reviewing MySQL server logs can provide insights into SSL session establishment and usage details.
Also check similar articles.
Setting TLS 1.3 Cipher in mysqldump
Configuring SSL FIPS Mode in mysqldump (OpenSSL Only)
Setting TLS Version in mysqldump
Setting Certificate Revocation List Path in mysqldump
Setting Certificate Revocation List in mysqldump
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