For failover protection and for availability for high-traffic subsystems, it is possible to clone an existing CA, DRM, TKS, or OCSP subsystem. To clone a subsystem, do the following:
Create a new instance using pkicreate.
Open the configuration wizard.
In the Security Domain panel, add the clone to the same security domain to which the master belongs.
The Subsystem Type panel sets whether to create a new instance or a clone; select the clone radio button.
Give the path and filename of the PKCS #12 backup file which was saved when the master instance was created. If a backup was not created at that time, use the pk12util utility to create a PKCS #12 file.
When cloning a CA, the master and clone instances have the same CA signing key.
The subsystem information is automatically supplied from the master instance to the clone instance once the keys are successfully restored. Complete the configuration process.
Restart the clone instance.
/etc/init.d/instance-idrestart
For more information on using cloning as part of a deployment strategy, see Chapter 21, Configuring the Certificate System for High Availability.