29.9. Using Ansible to install an IdM server with integrated eDNS and an external root CA

Procedure

1. Optional: To use a custom PEM-formatted certificate and key for DoT issued by an external certificate authority:

   1. SSH to the host where you are going to install the IdM server:

      $ ssh root@server.idm.example.com

   2. Create the two files and assign ownership to the named daemon:

      # openssl req \
        -newkey rsa:2048 \
        -nodes \
        -keyout /etc/pki/tls/certs/privkey.pem \
        -x509 \
        -days 36500 \
        -out /etc/pki/tls/certs/certificate.pem \
        -subj "/C=<country_code>/ST=<state>/L=<location>/O=<organization>/OU=<organizational_unit>/CN=<idm_server_fqdn>/emailAddress=<email>" && \
        chown named:named /etc/pki/tls/certs/privkey.pem /etc/pki/tls/certs/certificate.pem

   3. Exit the SSH session on the IdM server:

      # exit

2. On the Ansible controller, create a playbook file named install-server-external-ca-step1.yml with the instructions to install an IdM server with an external CA:

   ---
   - name: Playbook to configure IPA server Step 1: generate CSR for IdM external CA setup
     hosts: ipaserver
     become: true
     vars_files:
     - /home/user_name/MyPlaybooks/secret.yml
     vars:
       ipaserver_domain: idm.example.com
       ipaserver_realm: IDM.EXAMPLE.COM
       ipaserver_hostname: server.idm.example.com
       ipaadmin_password: "{{ vault_admin_password }}"
       ipadm_password: "{{ vault_dm_password }}"
       ipaserver_setup_dns: true
       ipaserver_dot_forwarders:
         - "<server_ip>#<dns_server_hostname>"
       ipaserver_external_ca: true
       ipaserver_dns_over_tls: true
       ipaserver_no_dnssec_validation: true
       ipaserver_auto_reverse: true
   
     roles:
       - role: freeipa.ansible_freeipa.ipaserver
   
     post_tasks:
     - name: Copy CSR /root/ipa.csr from node to "{{ groups.ipaserver[0] + '-ipa.csr' }}"
       fetch:
         src: /root/ipa.csr
         dest: "{{ groups.ipaserver[0] + '-ipa.csr' }}"
         flat: true

   If you are using a custom PEM-formatted certificate and key for DoT issued by an external certificate authority, add the following in the vars section:

   ipaserver_dns_over_tls_cert: /etc/pki/tls/certs/certificate.pem
   ipaserver_dns_over_tls_key: /etc/pki/tls/certs/privkey.pem

3. Run the Ansible playbook with the instructions for the first step of the installation:

   $ ansible-playbook --vault-password-file=password_file -v -i ~/MyPlaybooks/inventory ~/MyPlaybooks/install-server-external-ca-step1.yml

4. Locate the ipa.csr certificate signing request file on the controller and submit it to the external CA.
5. Place the IdM CA certificate signed by the external CA and the CA certificate chain in the controller file system so that the playbook in the next step can find it.

6. Create a new Ansible playbook, for example install-server-external-ca-step2.yml, for the second step of IdM server installation with the following content:

   ---
   - name: Playbook to configure IdM server Step 2: import certificates and finalize installation
     hosts: ipaserver
     become: true
     vars_files:
     - /home/user_name/MyPlaybooks/secret.yml
     vars:
       ipaserver_domain: idm.example.com
       ipaserver_realm: IDM.EXAMPLE.COM
       ipaserver_hostname: server.idm.example.com
       ipaadmin_password: "{{ vault_admin_password }}"
       ipadm_password: "{{ vault_dm_password }}"
       ipaserver_setup_dns: true
       ipaserver_dot_forwarders:
         - "<server_ip>#<dns_server_hostname>"
       ipaserver_external_ca: true
       ipaserver_dns_over_tls: true
       ipaserver_no_dnssec_validation: true
       ipaserver_auto_reverse: true
       ipaserver_external_cert_files:
         - servercert20240601.pem
         - cacert.pem
   
     pre_tasks:
     - name: Copy "{{ groups.ipaserver[0] }}-{{ item }}" to "/root/{{ item }}" on node
       ansible.builtin.copy:
         src: "{{ groups.ipaserver[0] }}-{{ item }}"
         dest: "/root/{{ item }}"
         force: true
       with_items:
       - servercert20240601.pem
       - cacert.pem
   
     roles:
     - role: freeipa.ansible_freeipa.ipaserver
       state: present

7. Run the Ansible playbook with the instructions for the final step of the installation:

   $ ansible-playbook --vault-password-file=password_file -v -i ~/MyPlaybooks/inventory ~/MyPlaybooks/install-server-external-ca-step2.yml

Troubleshooting

1. SSH to the IdM server:

   # ssh root@server.idm.example.com

2. Enable detailed logging for the unbound service:

   # unbound-control verbosity 3

3. Restart the unbound service to apply the updated configuration:

   # systemctl restart unbound

4. Monitor real-time logs of the unbound service:

   $ journalctl -u unbound -f