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All about ansible vault

This blogpost is about using ansible vault. Vault is a way to encrypt sensitive information in ansible scripts by encrypting it. The motivation for this blogpost is the lack of a description that makes sense to me of what the possibilities are for using vault, and how to use the vault options in playbooks.

The basic way ansible vault works, is that when ansible-playbook reads a yaml file, it encounters $ANSIBLE_VAULT;1.1;AES256 indicating ansible vault is used to encrypt the directly following lines, it will use a password to decrypt it, and then uses the decrypted version in memory only. This way secrets can be hidden from being visible. Obviously, the password will allow decrypting it, and the password must be used in order for ansible-playbook to decrypt it.

The original use of vault is to encrypt an entire yaml file. As of Ansible version 2.3, ansible allows the encryption of single values in a yaml file.