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Chapter 3. Preparing for server loss with replication

Follow these guidelines to establish a replication topology that will allow you to respond to losing a server:

3.1. Protecting IdM CA data

If your deployment contains the integrated IdM Certificate Authority (CA), install several CA replicas so you can create additional CA replicas if one is lost.

Procedure

  1. Configure three or more replicas to provide CA services.

    1. To install a new replica with CA services, run ipa-replica-install with the --setup-ca option. 

      [root@server ~]# ipa-replica-install --setup-ca
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    2. To install CA services on a preexisting replica, run ipa-ca-install. 

      [root@replica ~]# ipa-ca-install
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  2. Create CA replication agreements between your CA replicas. 

    [root@careplica1 ~]# ipa topologysegment-add
Suffix name: ca
Left node: ca-replica1.example.com
Right node: ca-replica2.example.com
Segment name [ca-replica1.example.com-to-ca-replica2.example.com]: new_segment
---------------------------
Added segment "new_segment"
---------------------------
  Segment name: new_segment
  Left node: ca-replica1.example.com
  Right node: ca-replica2.example.com
  Connectivity: both
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Warning

If only one server provides CA services and it is damaged, the entire environment will be lost. If you use the IdM CA, Red Hat strongly recommends having three or more replicas with CA services installed, with CA replication agreements between them.

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