第5章 Using Ansible to manage IdM service vaults: storing and retrieving secrets


This section shows how an administrator can use the ansible-freeipa vault module to securely store a service secret in a centralized location. The vault used in the example is asymmetric, which means that to use it, the administrator needs to perform the following steps:

  1. Generate a private key using, for example, the openssl utility.
  2. Generate a public key based on the private key.

The service secret is encrypted with the public key when an administrator archives it into the vault. Afterwards, a service instance hosted on a specific machine in the domain retrieves the secret using the private key. Only the service and the administrator are allowed to access the secret.

If the secret is compromised, the administrator can replace it in the service vault and then redistribute it to those individual service instances that have not been compromised.

5.1. Prerequisites

In the following procedures:

  • admin is the administrator who manages the service password.
  • private-key-to-an-externally-signed-certificate.pem is the file containing the service secret, in this case a private key to an externally signed certificate. Do not confuse this private key with the private key used to retrieve the secret from the vault.
  • secret_vault is the vault created to store the service secret.
  • HTTP/webserver1.idm.example.com is the service that is the owner of the vault.
  • HTTP/webserver2.idm.example.com and HTTP/webserver3.idm.example.com are the vault member services.
  • service-public.pem is the service public key used to encrypt the password stored in password_vault.
  • service-private.pem is the service private key used to decrypt the password stored in secret_vault.

For more information, you can see a relevant README-vault.md file in the /usr/share/ansible/collections/ansible_collections/freeipa/ansible_freeipa/ directory and sample playbooks in the /usr/share/ansible/collections/ansible_collections/freeipa/ansible_freeipa/playbooks/vault/ directory.

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