Enabling TLS 1.2 for MariaDB Database Server
TLS 1.2 encrypts the connection between the MariaDB server and the Cloudera Manager server. You must enable TLS 1.2 for the MariaDB database before setting up Cloudera Manager and add the MariaDB root Certificate Authorities (CA) to the Cloudera Manager truststore.
- SSH into the MariaDB database host.
-
Start the MariaDB server:
service mysqld start
-
Establish an encrypted connection with the client:
mysql -p --ssl=true
-
Verify whether TLS 1.2 is enabled on MariaDB by running the following command:
mysql> show global variables like '%ssl%';
If TLS 1.2 is enabled, you see the value ofhave_ssl
equal toYES
, as follows. Otherwise, you see the value ofhave_ssl
equal toDISABLED
:+---------------+----------+ | Variable_name | Value | +---------------+----------+ | have_openssl | YES | | have_ssl | YES | | ... | ... |
If TLS 1.2 is enabled, then you can skip the following steps and go to Importing the MariaDB root certificate. -
Create a certificate authority by running the following commands:
mkdir /etc/my.cnf.d/ssl/ cd /etc/my.cnf.d/ssl/ openssl genrsa 2048 > ca-key.pem
-
Create a certificate for the server using the CA certificate generated earlier by
running the following command:
openssl req -new -x509 -nodes -days 365000 -key ca-key.pem -out ca-cert.pem openssl req -newkey rsa:2048 -days 365 -nodes -keyout server-key.pem -out server-req.pem openssl rsa -in server-key.pem -out server-key.pem
-
Create a certificate for the clients using the same CA certificate by running the
following command:
openssl x509 -req -in server-req.pem -days 365 -CA ca-cert.pem -CAkey ca-key.pem -set_serial 01 -out server-cert.pem
-
Add the following lines in the /etc/my.cnf.d/server.cnf file under
the [mysqld] section:
ssl-ca=/etc/my.cnf.d/ssl/ca-cert.pem ssl-cert=/etc/my.cnf.d/ssl/server-cert.pem ssl-key=/etc/my.cnf.d/ssl/server-key.pem bind-address=*
You can view the content of theserver.cnf
file by running the following command:vim /etc/my.cnf.d/server.cnf
-
Restart the MariaDB server:
service mysqld restart
-
Check the TLS 1.2 status by running the following commands:
mysql -p --ssl=true > SHOW VARIABLES LIKE '%ssl%'; > status
Sample output:> SHOW VARIABLES LIKE '%ssl%'; +---------------------+-----------------------------------+ | Variable_name | Value | +---------------------+-----------------------------------+ | have_openssl | YES | | have_ssl | YES | | ssl_ca | /etc/my.cnf.d/ssl/ca-cert.pem | | ssl_capath | | | ssl_cert | /etc/my.cnf.d/ssl/server-cert.pem | | ssl_cipher | | | ssl_crl | | | ssl_crlpath | | | ssl_key | /etc/my.cnf.d/ssl/server-key.pem | | version_ssl_library | OpenSSL 1.0.2k-fips 26 Jan 2017 | +---------------------+-----------------------------------+ > status SSL: Cipher in use is DHE-RSA-AES256-GCM-SHA384