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Chapter 3. Managing IdM certificates using Ansible

You can use the ansible-freeipa ipacert module to request, revoke, and retrieve SSL certificates for Identity Management (IdM) users, hosts and services. You can also restore a certificate that has been put on hold.

3.1. Using Ansible to request SSL certificates for IdM hosts, services and users

You can use the ansible-freeipa ipacert module to request SSL certificates for Identity Management (IdM) users, hosts and services. They can then use these certificates to authenticate to IdM.

Complete this procedure to request a certificate for an HTTP server from an IdM certificate authority (CA) using an Ansible playbook.

Prerequisites

  • On the control node:

    • You are using Ansible version 2.15 or later.
    • You have installed the ansible-freeipa package.
    • You have created an Ansible inventory file with the fully-qualified domain name (FQDN) of the IdM server in the ~/MyPlaybooks/ directory.
    • You have stored your ipaadmin_password in the secret.yml Ansible vault.
  • Your IdM deployment has an integrated CA.

Procedure

  1. Generate a certificate-signing request (CSR) for your user, host or service. For example, to use the openssl utility to generate a CSR for the HTTP service running on client.idm.example.com, enter: 

    # openssl req -new -newkey rsa:2048 -days 365 -nodes -keyout new.key -out new.csr -subj '/CN=client.idm.example.com,O=IDM.EXAMPLE.COM'

    As a result, the CSR is stored in new.csr.

  2. Create your Ansible playbook file request-certificate.yml with the following content: 

    ---
- name: Playbook to request a certificate
  hosts: ipaserver

  vars_files:
  - /home/user_name/MyPlaybooks/secret.yml

  tasks:
  - name: Request a certificate for a web server
    ipacert:
      ipaadmin_password: "{{ ipaadmin_password }}"
      state: requested
      csr: |
        -----BEGIN CERTIFICATE REQUEST-----
        MIGYMEwCAQAwGTEXMBUGA1UEAwwOZnJlZWlwYSBydWxlcyEwKjAFBgMrZXADIQBs
        HlqIr4b/XNK+K8QLJKIzfvuNK0buBhLz3LAzY7QDEqAAMAUGAytlcANBAF4oSCbA
        5aIPukCidnZJdr491G4LBE+URecYXsPknwYb+V+ONnf5ycZHyaFv+jkUBFGFeDgU
        SYaXm/gF8cDYjQI=
        -----END CERTIFICATE REQUEST-----
      principal: HTTP/client.idm.example.com
    register: cert

    Replace the certificate request with the CSR from new.csr.

  3. Request the certificate: 

    $ ansible-playbook --vault-password-file=password_file -v -i <path_to_inventory_directory>/hosts <path_to_playbooks_directory>/request-certificate.yml

Additional resources

3.2. Using Ansible to revoke SSL certificates for IdM hosts, services and users

You can use the ansible-freeipa ipacert module to revoke SSL certificates used by Identity Management (IdM) users, hosts and services to authenticate to IdM.

Complete this procedure to revoke a certificate for an HTTP server using an Ansible playbook. The reason for revoking the certificate is “keyCompromise”.

Prerequisites

  • On the control node:

    • You are using Ansible version 2.15 or later.
    • You have installed the ansible-freeipa package.
    • You have created an Ansible inventory file with the fully-qualified domain name (FQDN) of the IdM server in the ~/MyPlaybooks/ directory.
    • You have stored your ipaadmin_password in the secret.yml Ansible vault.
    • You have obtained the serial number of the certificate, for example by entering the openssl x509 -noout -text -in <path_to_certificate> command. In this example, the serial number of the certificate is 123456789.
  • Your IdM deployment has an integrated CA.

Procedure

  1. Create your Ansible playbook file revoke-certificate.yml with the following content: 

    ---
- name: Playbook to revoke a certificate
  hosts: ipaserver

  vars_files:
  - /home/user_name/MyPlaybooks/secret.yml

  tasks:
  - name: Revoke a certificate for a web server
    ipacert:
      ipaadmin_password: "{{ ipaadmin_password }}"
      serial_number: 123456789
      revocation_reason: "keyCompromise"
      state: revoked

  2. Revoke the certificate: 

    $ ansible-playbook --vault-password-file=password_file -v -i <path_to_inventory_directory>/hosts <path_to_playbooks_directory>/revoke-certificate.yml

Additional resources

3.3. Using Ansible to restore SSL certificates for IdM users, hosts, and services

You can use the ansible-freeipa ipacert module to restore a revoked SSL certificate previously used by an Identity Management (IdM) user, host or a service to authenticate to IdM.

Note

You can only restore a certificate that was put on hold. You may have put it on hold because, for example, you were not sure if the private key had been lost. However, now you have recovered the key and as you are certain that no-one has accessed it in the meantime, you want to reinstate the certificate.

Complete this procedure to use an Ansible playbook to release a certificate for a service enrolled into IdM from hold. This example describes how to release a certificate for an HTTP service from hold.

Prerequisites

  • On the control node:

    • You are using Ansible version 2.15 or later.
    • You have installed the ansible-freeipa package.
    • You have created an Ansible inventory file with the fully-qualified domain name (FQDN) of the IdM server in the ~/MyPlaybooks/ directory.
    • You have stored your ipaadmin_password in the secret.yml Ansible vault.
  • Your IdM deployment has an integrated CA.
  • You have obtained the serial number of the certificate, for example by entering the openssl x509 -noout -text -in path/to/certificate command. In this example, the certificate serial number is 123456789.

Procedure

  1. Create your Ansible playbook file restore-certificate.yml with the following content: 

    ---
- name: Playbook to restore a certificate
  hosts: ipaserver
  vars_files:
  - /home/user_name/MyPlaybooks/secret.yml

  tasks:
  - name: Restore a certificate for a web service
    ipacert:
      ipaadmin_password: "{{ ipaadmin_password }}"
      serial_number: 123456789
      state: released

  2. Run the playbook: 

    $ ansible-playbook --vault-password-file=password_file -v -i <path_to_inventory_directory>/hosts <path_to_playbooks_directory>/restore-certificate.yml

Additional resources

3.4. Using Ansible to retrieve SSL certificates for IdM users, hosts, and services

You can use the ansible-freeipa ipacert module to retrieve an SSL certificate issued for an Identity Management (IdM) user, host or a service, and store it in a file on the managed node.

Prerequisites

  • On the control node:

    • You are using Ansible version 2.15 or later.
    • You have installed the ansible-freeipa package.
    • You have created an Ansible inventory file with the fully-qualified domain name (FQDN) of the IdM server in the ~/MyPlaybooks/ directory.
    • You have stored your ipaadmin_password in the secret.yml Ansible vault.
  • You have obtained the serial number of the certificate, for example by entering the openssl x509 -noout -text -in <path_to_certificate> command. In this example, the serial number of the certificate is 123456789, and the file in which you store the retrieved certificate is cert.pem.

Procedure

  1. Create your Ansible playbook file retrieve-certificate.yml with the following content: 

    ---
- name: Playbook to retrieve a certificate and store it locally on the managed node
  hosts: ipaserver

  vars_files:
  - /home/user_name/MyPlaybooks/secret.yml

  tasks:
  - name: Retrieve a certificate and save it to file 'cert.pem'
    ipacert:
      ipaadmin_password: "{{ ipaadmin_password }}"
      serial_number: 123456789
      certificate_out: cert.pem
      state: retrieved

  2. Retrieve the certificate: 

    $ ansible-playbook --vault-password-file=password_file -v -i <path_to_inventory_directory>/hosts <path_to_playbooks_directory>/retrieve-certificate.yml

Additional resources

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