lecm 0.0.3

========================================
lecm: Let's Encrypt Certificates Manager
========================================

|buildstatus|_ |release|_


`Let's Encrypt`_ Certificates Manager (lecm) is an
utility that allows one to manage (generate and renew) Let's Encrypt SSL
certificates.

Goal
----

The goal of ``lecm`` is to be able to generate and renew
`Let's Encrypt`_ SSL certificates automatically.

``lecm`` is configuration driven. Each certificate that needs to be managed
is described in the configuration file.


How to run it
-------------

``lecm`` is configuration driven. The configuration file is (by order of
priority):

1. The one specified on the command line (``lecm --conf /path/to/conf.yml``)
2. The one specified in the environment variable ``$LECM_CONFIGURATION``
3. The ``/etc/lecm.conf``

``lecm`` supports various commands:


``--generate``
^^^^^^^^^^^^^^

``lecm --generate`` will generate SSL certificates for items listed in the
configuration file that are not present in the filesystem.


``--renew``
^^^^^^^^^^^

``lecm --renew`` will renew SSL certificates already present on the filesystem
if its expiry date is lower than the ``remainin_days`` value.

``--list``
^^^^^^^^^^

``lecm --list`` will display basic informations about currently configured items.


.. code-block::

+----------------------------------+---------------+------------------------------------------------------------------+-----------------------------------------------------------+------+
| Item | Status | subjectAltName | Location | Days |
+----------------------------------+---------------+------------------------------------------------------------------+-----------------------------------------------------------+------+
| lecm-test.distributed-ci.io | Generated | DNS:lecm-test.distributed-ci.io | /etc/letsencrypt/pem/lecm-test.distributed-ci.io.pem | 89 |
| lecm-test-test.distributed-ci.io | Not-Generated | DNS;lecm-test-test.distributed-ci.io,DNS:lecm.distributedi-ci.io | /etc/letsencrypt/pem/lecm-test-test.distributed-ci.io.pem | N/A |
+----------------------------------+---------------+------------------------------------------------------------------+-----------------------------------------------------------+------+


``--list-details``
^^^^^^^^^^^^^^^^

``lecm --list-details`` will display details informations about currently configured items.

.. code-block::

+----------------------------------+---------------+------------------------------------------------------------------+---------------------------+-----------------------------------------------------------+------+------+--------+------+
| Item | Status | subjectAltName | emailAddress | Location | Type | Size | Digest | Days |
+----------------------------------+---------------+------------------------------------------------------------------+---------------------------+-----------------------------------------------------------+------+------+--------+------+
| lecm-test.distributed-ci.io | Generated | DNS:lecm-test.distributed-ci.io | distributed-ci@redhat.com | /etc/letsencrypt/pem/lecm-test.distributed-ci.io.pem | RSA | 4096 | sha256 | 89 |
| lecm-test-test.distributed-ci.io | Not-Generated | DNS;lecm-test-test.distributed-ci.io,DNS:lecm.distributedi-ci.io | distributed-ci@redhat.com | /etc/letsencrypt/pem/lecm-test-test.distributed-ci.io.pem | RSA | 2048 | sha256 | N/A |
+----------------------------------+---------------+------------------------------------------------------------------+---------------------------+-----------------------------------------------------------+------+------+--------+------+


Configuration
-------------

Every parameters are either applicable globally or within the scope of a certificate. The finest specification wins.

+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| Parameter | Scope | Default | Description |
+========================+================+=========+===============================================================================+
| path | global, backup | None | Foler where will reside all the relevant files |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| type | global, backup | RSA | Type of the key to generate (Possible: RSA, DSA) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| size | global, backup | 4096 | Size of the key to generate |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| digest | global, backup | sha256 | Digest of the key to generate |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| version | global, backup | 3 | Version of the SSL Certificate to generate |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| subjectAltName | global, backup | None | subjectAltName value of the Certificate Signing Request (csr) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| countryName | global, backup | None | countryName value of the Certificate Signing Request (csr) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| stateOrProvinceName | global, backup | None | stateOrProvinceName value of the Certificate Signing Request (csr) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| localityName | global, backup | None | localityName value of the Certificate Signing Request (csr) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| organizationName | global, backup | None | organizationName value of the Certificate Signing Request (csr) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| organizationalUnitName | global, backup | None | organizationalUnitName value of the Certificate Signing Request (csr) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| commonName | global, backup | None | commonName value of the Certificate Signing Request (csr) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| emailAddress | global, backup | None | emailAddress value of the Certificate Signing Request (csr) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| account_key_name | global, backup | None | Name of the account key to generate |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| remaining_days | global, backup | 10 | Number of days of validity below which the SSL Certificate should be renewed |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| service_name | global, backup | httpd | Service that needs to be reloaded for the change to be taken in consideration |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+
| service_provider | global, backup | systemd | Service management system (Possible: systemd, sysv) |
+------------------------+----------------+---------+-------------------------------------------------------------------------------+


Configuration file example
--------------------------

.. code-block::

---
path: /etc/letsencrypt
type: RSA
size: 4096
digest: sha256
version: 3
service_name: httpd
remaining_days: 10
emailAddress: admin@example.com
account_key_name: myhost.key

certificates:
my.example.com:
app.example.com:
subjectAltName:
- app.example.com
- app1.example.com
- app2.example.com
emailAddress: app-admin@example.com
size: 2048
service_name: nginx


Httpd and Nginx
---------------

``lecm`` does not configure the webservers, they have to be previously
configured to be able to answer the challenges.

httpd
^^^^^

.. code-block::

Alias /.well-known/acme-challenge /etc/letsencrypt/challenges/my.example.com
<Directory /etc/letsencrypt/challenges/my.example.com>
Require all granted
</Directory>


nginx
^^^^^

.. code-block::

location /.well-known/acme-challenge/ {
alias /etc/letsencrypt/challenges/my.example.com;
try_files $uri =404;
}


.. |buildstatus| image:: https://img.shields.io/travis/Spredzy/lecm/master.svg
.. _buildstatus: https://travis-ci.org/Spredzy/lecm

.. |release| image:: https://img.shields.io/pypi/v/lecm.svg
.. _release: https://pypi-hypernode.com/pypi/lecm

.. _Let's Encrypt: https://letsencrypt.org/