10.2. Cloning a CA

Configure the master CA, and back up the keys.
In the CS.cfg file for the master CA, enable the master CA to monitor replication database changes by adding the ca.listenToCloneModifications parameter:
```
ca.listenToCloneModifications=true
```
Create the clone subsystem instance.
For examples of the configuration file required by pkispawn when cloning CA subsystems, see the Installing a CA clone and Installing a CA clone on the same host sections of the pkispawn(8) man page.
Restart the Directory Server instance used by the clone.
```
# systemctl restart pki-tomcatd@kra-clone-ds-instance.service
```
Note
Restarting the Directory Server reloads the updated schema, which is required for proper performance.

Restart the clone instance.

# systemctl restart pki-tomcatd@instance_name.service

After configuring the clone, test to make sure that the master-clone relationship is functioning:

Request a certificate from the cloned CA.
Approve the request.
Download the certificate to the browser.
Revoke the certificate.
Check master CA's CRL for the revoked certificate. In the master Certificate Manager's agent services page, click Update Certificate Revocation List. Find the CRL in the list.
The CRL should show the certificate revoked by the cloned Certificate Manager. If that certificate is not listed, check logs to resolve the problem.