An Ansible role that automates the generation of Let's Encrypt signed certificates with DNS challenges on Amazon's Route 53 (AWS)
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README.md

lets-encrypt-route-53

This is an Ansible role that automates the generation of Let's Encrypt signed certificates with DNS challenges on Amazon's Route 53 (AWS).

Please note that as part of this role, openssl, boto, and pyOpenSSL will be installed. If you are using CentOS/Red Hat, the role will install pip (requires EPEL) and then install boto and pyOpenSSL in a Python virtualenv instead because the packaged version of pyOpenSSL is not recent enough.

If you are not using this role on Debian/Ubuntu, CentOS/Red Hat, or FreeBSD, openssl, boto, and pyOpenSSL must be installed manually before using this role.

Requirements

Ansible 2.7+ is required for this role. If you are using an older version of Ansible, use version 4.2.1 of this role. This role also must be run by root or through sudo/become.

Role Variables

Required Variables

  • ler53_aws_access_key - the access key to an AWS user that is allowed to add records to the domain the SSL certificate is being generated for.
  • ler53_aws_secret_key - the secret key to an AWS user that is allowed to add records to the domain the SSL certificate is being generated for.
  • ler53_route_53_domain - the Route 53 (AWS) domain/zone the SSL certificate is being generated for.

Optional Variables

  • ler53_cert_common_name - the common name for the SSL certificate being generated. This defaults to the value of ansible_fqdn.
  • ler53_cert_sans - a list of DNS subject alternative names (SAN's) of the same domain as specified in ler53_route_53_domain to include in the CSR. Please note that a DNS SAN for the value of ler53_cert_common_name is automatically added and should not be added to this list. This variable is not defined by default.
  • ler53_cert_key_usages - a list of key usages to include in the CSR (Let's Encrypt may restrict some). This defaults to digitalSignature and keyEncipherment.
  • ler53_key_size - the size of the private key that is paired to the certificate being generated. This defaults to 2048.
  • ler53_cert_dir - the path to the directory to store the private key, CSR, and certificate. This defaults to /etc/ssl/{{ ler53_cert_common_name }}.
  • ler53_key_file_name - the file name of the private key that is paired to the certificate being generated. This defaults to {{ ler53_cert_common_name }}.key.
  • ler53_cert_file_name - the file name of the certificate being generated. This defaults to {{ ler53_cert_common_name }}.crt.
  • ler53_csr_file_name - the file name of the certificate signing request (CSR) being generated. This defaults to {{ ler53_cert_common_name }}.csr.
  • ler53_intermediate_download - whether or not the Let's Encrypt intermediate CA should be downloaded. This defaults to true.
  • ler53_intermediate_file_name - the file name of the intermediate CA downloaded from Let's Encrypt. This defaults to {{ ler53_cert_common_name }}.intermediate.pem.
  • ler53_cert_and_intermediate_file_name - the name of the file created with the certificate and the intermediate CA concatenated together. This defaults to {{ ler53_cert_common_name }}.pem.
  • ler53_cert_files_mode - the file mode/permissions to force on the private key, CSR, and certificate. This defaults to 0600.
  • ler53_cert_files_owner - the file owner to force on the private key, CSR, and certificate. This defaults to root.
  • ler53_cert_files_group - the file group to force on the private key, CSR, and certificate. This defaults to root.
  • ler53_account_email - an email to associate with your Let's Encrypt account. Please view the Let's Encrypt Module for more information.
  • ler53_account_key_size - the size of the Let's Encrypt account key that is generated if it isn't present. This defaults to 2048.
  • ler53_account_key_dir - the path to the directory to store the Let's Encrypt account key. This defaults to /etc/ssl/lets_encrypt.
  • ler53_account_key_file_name - the file name of the Let's Encrypt account key. This defaults to lets_encrypt_account.key.
  • ler53_cert_remaining_days_before_renewal - the minimum number of days left of the current certificate being valid until it is renewed. This defaults to 10.
  • ler53_agreement - overwrite the default URL to the Let's Encrypt agreement. This is useful when the Let's Encrypt agreement changes and the version of Ansible you are using has an outdated default.
  • ler53_new_cert_when_csr_changes - delete the existing certificate when the CSR changes. This is useful when you change the common name or SANs on your certificate and you'd like to generate a new certificate without waiting for it to expire. This defaults to false.
  • ler53_cert_extended_key_usages - Additional restrictions (e.g. client authentication, server authentication) on the allowed purposes for which the public key may be used.
  • ler53_service_handlers - A list of dictionaries describing service handlers to run when a certificate is updated in the format of {'name': 'httpd', 'state': 'restarted'}.

Example Playbook

- name: Generate an SSL certificate for host.example.com
  hosts: host
  become: yes

  vars:
  - ler53_cert_common_name: host.example.com
  - ler53_route_53_domain: example.com
  - ler53_aws_access_key: SomeAccessKey
  - ler53_aws_secret_key: SomeSecretKey

  roles:
  - mprahl.lets-encrypt-route-53

License

MIT