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Ansible Vault

Introduction

Ansible Vault is a feature of Ansible that allows you to encrypt sensitive data, such as passwords or keys, so that they can be safely kept in source control. It enables secure storage and management of secrets in your automation workflows.

Key Concepts

  • Encryption: The process of converting plaintext into ciphertext to prevent unauthorized access.
  • Decryption: The process of converting ciphertext back into plaintext using a key.
  • Vault Password: A password used to encrypt and decrypt the files.
  • Vault ID: An identifier for a specific vault password file, allowing multiple vaults with different passwords.

Usage

Creating a Vault

ansible-vault create secret.yml

This command will prompt you to enter a password and then open the file in your default editor for you to enter the secret data.

Editing a Vault

ansible-vault edit secret.yml

Use this command to modify the contents of an existing vault file.

Encrypting an Existing File

ansible-vault encrypt myfile.yml

This command will encrypt an existing YAML file.

Decrypting a Vault

ansible-vault decrypt secret.yml

Use this command to decrypt a vault file.

Using Vault in Playbooks

- hosts: all
  tasks:
    - name: Include secrets
      include_vars: secret.yml

Best Practices

  • Use Ansible Vault for any sensitive data in your playbooks.
  • Store vault passwords securely, such as in a password manager.
  • Use vault IDs to manage multiple vaults with different passwords for better organization.
  • Regularly rotate your encryption keys and passwords to enhance security.

FAQ

What happens if I forget my vault password?

If you forget your vault password, you will not be able to decrypt the files encrypted with that password. It's crucial to securely store your vault passwords.

Can I use Ansible Vault with other file types?

Yes, Ansible Vault can be used to encrypt any type of file, not just YAML files. Just ensure that you specify the correct file format when using it.

How can I automate the vault password entry?

You can use a vault password file by passing it with the --vault-password-file option when running Ansible commands.

Workflow Diagram

graph TD;
            A[Create Vault] --> B[Encrypt Data];
            B --> C[Store in SCM];
            C --> D[Use in Playbooks];
            D --> E[Decrypt at Runtime];