Chapter 18. Decommissioning a server that performs the CA renewal server and CRL publisher roles

Procedure

1. Obtain the IdM administrator credentials:

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   [user@server ~]$ kinit admin
   Password for admin@IDM.EXAMPLE.COM:

2. Optional: If you are not sure which servers perform the CA renewal server and CRL publisher roles:

   1. Display the current CA renewal server. You can run the following command from any IdM server:

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      [user@server ~]$ ipa config-show | grep 'CA renewal'
        IPA CA renewal master: server.idm.example.com

   2. Test if a host is the current CRL publisher.

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      [user@server ~]$ ipa-crlgen-manage status
      CRL generation: enabled
      Last CRL update: 2019-10-31 12:00:00
      Last CRL Number: 6
      The ipa-crlgen-manage command was successful

      A CA server that does not generate the CRL displays CRL generation: disabled.

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      [user@replica ~]$ ipa-crlgen-manage status
      CRL generation: disabled
      The ipa-crlgen-manage command was successful

      Continue entering this command on CA servers until you find the CRL publisher server.

   3. Display all other CA servers you can promote to fulfill these roles. This environment has two CA servers.

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      [user@server ~]$ ipa server-role-find --role 'CA server'
      ----------------------
      2 server roles matched
      ----------------------
        Server name: server.idm.example.com
        Role name: CA server
        Role status: enabled
        Server name: replica.idm.example.com
        Role name: CA server
        Role status: enabled
      ----------------------------
      Number of entries returned 2
      ----------------------------

3. Set replica.idm.example.com as the CA renewal server.

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   [user@server ~]$ ipa config-mod --ca-renewal-master-server replica.idm.example.com

4. On server.idm.example.com:

   1. Disable the certificate updater task:

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      [root@server ~]# pki-server ca-config-set ca.certStatusUpdateInterval 0

   2. Restart IdM services:

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      [root@server ~]# ipactl restart

5. On replica.idm.example.com:

   1. Enable the certificate updater task:

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      [root@replica ~]# pki-server ca-config-unset ca.certStatusUpdateInterval

   2. Restart IdM services:

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      [root@replica ~]# ipactl restart

6. On server.idm.example.com, stop generating the CRL.

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   [user@server ~]$ ipa-crlgen-manage disable
   Stopping pki-tomcatd
   Editing /var/lib/pki/pki-tomcat/conf/ca/CS.cfg
   Starting pki-tomcatd
   Editing /etc/httpd/conf.d/ipa-pki-proxy.conf
   Restarting httpd
   CRL generation disabled on the local host. Please make sure to configure CRL generation on another master with ipa-crlgen-manage enable.
   The ipa-crlgen-manage command was successful

7. On replica.idm.example.com, start generating the CRL.

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   [user@replica ~]$ ipa-crlgen-manage enable
   Stopping pki-tomcatd
   Editing /var/lib/pki/pki-tomcat/conf/ca/CS.cfg
   Starting pki-tomcatd
   Editing /etc/httpd/conf.d/ipa-pki-proxy.conf
   Restarting httpd
   Forcing CRL update
   CRL generation enabled on the local host. Please make sure to have only a single CRL generation master.
   The ipa-crlgen-manage command was successful

8. Stop IdM services on server.idm.example.com:

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   [root@server ~]# ipactl stop

9. On replica.idm.example.com, delete server.idm.example.com from the IdM environment.

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   [user@replica ~]$ ipa server-del server.idm.example.com

10. On server.idm.example.com, use the ipa-server-install --uninstall command as the root account:

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    [root@server ~]# ipa-server-install --uninstall
    ...
    Are you sure you want to continue with the uninstall procedure? [no]: yes