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Quickstart
***** *****
This guide will step you through setting up a Python-based virtualenv, installing the required packages, and configuring the basic web service.
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This guide assumes a clean Ubuntu 14.04 instance, commands may differ based on the OS and configuration being used.
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Pressed for time? See the Lemur docker file on `Github <https://github.com/Netflix/lemur-docker> `_ .
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Dependencies
------------
Some basic prerequisites which you'll need in order to run Lemur:
* A UNIX-based operating system. We test on Ubuntu, develop on OS X
* Python 2.7
* PostgreSQL
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* Nginx
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.. note :: Lemur was built with in AWS in mind. This means that things such as databases (RDS), mail (SES), and TLS (ELB),
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are largely handled for us. Lemur does **not** require AWS to function. Our guides and documentation try to be
be as generic as possible and are not intended to document every step of launching Lemur into a given environment.
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Installing build dependencies
-----------------------------
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If installing Lemur on truely bare Ubuntu OS you will need to grab the following packages so that Lemur can correctly build it's
dependencies::
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.. code-block :: bash
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$ sudo apt-get update
$ sudo apt-get install install nodejs-legacy python-pip python-dev libpq-dev build-essential libssl-dev libffi-dev nginx git supervisor npm postgresql
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.. note :: PostgreSQL is only required if your database is going to be on the same host as the webserver. npm is needed if you're installing the Lemur source (e.g. from git).
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Now, install Python `` virtualenv `` package::
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.. code-block :: bash
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$ sudo pip install -U virtualenv
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Setting up an Environment
-------------------------
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In this guide Lemur will be installed in `` /www `` , so you need to create that structure first::
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.. code-block :: bash
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$ sudo mkdir /www
$ cd /www
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Clone Lemur inside this directory and give your user permission to write in it (assume your user is lemur here)::
.. code-block :: bash
$ sudo git clone https://github.com/Netflix/lemur
$ sudo chown -R lemur lemur/
Create the virtual environment, activate it and enter the Lemur's directory::
.. code-block :: bash
$ virtualenv lemur
$ source /www/lemur/bin/activate
$ cd lemur
.. note :: Activating the environment adjusts your PATH, so that things like pip now
install into the virtualenv by default.
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Installing from Source
~~~~~~~~~~~~~~~~~~~~~~
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Once your system is prepared, ensure that you are in the virtualenv:
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.. code-block :: bash
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$ which python
And then run:
.. code-block :: bash
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$ make develop
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.. note :: This command will install npm dependencies as well as compile static assets.
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Creating a configuration
------------------------
Before we run Lemur we must create a valid configuration file for it.
The Lemur cli comes with a simple command to get you up and running quickly.
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Simply run::
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.. code-block :: bash
$ lemur create_config
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.. note :: This command will create a default configuration under `~/.lemur/lemur.conf.py` you
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can specify this location by passing the `config_path` parameter to the `create_config` command.
You can specify `-c` or `--config` to any Lemur command to specify the current environment
you are working in. Lemur will also look under the environmental variable `LEMUR_CONF` should
that be easier to setup in your environment.
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Update your configuration
-------------------------
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Once created you will need to update the configuration file with information about your environment,
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such as which database to talk to, where keys are stored etc..
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.. note :: If you are unfamiliar with with the SQLALCHEMY_DATABASE_URI string it can be broken up like so:
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postgresql://userame:password@databasefqdn:databaseport/databasename
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Setup Postgres
--------------
For production a dedicated database is recommended, for this guide we will assume postgres has been installed and is on
the same machine that Lemur is installed on.
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First, set a password for the postgres user. For this guide, we will use **lemur** as an example but you should use the database password generated for by Lemur::
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$ sudo -u postgres psql postgres
# \password postgres
Enter new password: lemur
Enter it again: lemur
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Type CTRL-D to exit psql once you have changed the password.
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Next, we will create our new database::
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$ sudo -u postgres createdb lemur
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.. _InitializingLemur:
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Set a password for lemur user inside Postgres:
$ sudo -u postgres psql postgres
\password lemur
Enter new password: lemur
Enter it again: lemur
Again, type CTRL-D to exit psql.
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Initializing Lemur
------------------
Lemur provides a helpful command that will initialize your database for you. It creates a default user (lemur) that is
used by Lemur to help associate certificates that do not currently have an owner. This is most commonly the case when
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Lemur has discovered certificates from a third party source. This is also a default user that can be used to
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administer Lemur.
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In addition to creating a new user, Lemur also creates a few default email notifications. These notifications are based
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on a few configuration options such as `LEMUR_SECURITY_TEAM_EMAIL` . They basically guarantee that every ceritificate within
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Lemur will send one expiration notification to the security team.
Additional notifications can be created through the UI or API.
See :ref: `Creating Notifications <CreatingNotifications>` and :ref: `Command Line Interface <CommandLineInterface>` for details.
**Make note of the password used as this will be used during first login to the Lemur UI**
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.. code-block :: bash
$ lemur db init
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.. code-block :: bash
$ lemur init
.. note :: It is recommended that once the 'lemur' user is created that you create individual users for every day access.
There is currently no way for a user to self enroll for Lemur access, they must have an administrator create an account
for them or be enrolled automatically through SSO. This can be done through the CLI or UI.
See :ref: `Creating Users <CreatingUsers>` and :ref: `Command Line Interface <CommandLineInterface>` for details
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Setup a Reverse Proxy
---------------------
By default, Lemur runs on port 5000. Even if you change this, under normal conditions you won't be able to bind to
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port 80. To get around this (and to avoid running Lemur as a privileged user, which you shouldn't), we need setup a
simple web proxy. There are many different web servers you can use for this, we like and recommend Nginx.
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Proxying with Nginx
~~~~~~~~~~~~~~~~~~~
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You'll use the builtin HttpProxyModule within Nginx to handle proxying. Edit the `` /etc/nginx/sites-available/default `` file according to the lines below::
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::
location /api {
proxy_pass http://127.0.0.1:5000;
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
proxy_redirect off;
proxy_buffering off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
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location / {
root /www/lemur/lemur/static/dist;
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include mime.types;
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index index.html;
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}
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.. note :: See :doc: `../production/index` for more details on using Nginx.
After making these changes, restart Nginx service to apply them::
$ sudo service nginx restart
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Starting the Web Service
------------------------
Lemur provides a built-in webserver (powered by gunicorn and eventlet) to get you off the ground quickly.
To start the webserver, you simply use `` lemur start `` . If you opted to use an alternative configuration path
you can pass that via the --config option.
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.. note ::
You can login with the default user created during :ref: `Initializing Lemur <InitializingLemur>` or any other
user you may have created.
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::
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# Lemur's server runs on port 5000 by default. Make sure your client reflects
# the correct host and port!
lemur --config=/etc/lemur.conf.py start -b 127.0.0.1:5000
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You should now be able to test the web service by visiting `http://localhost:5000/` .
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Running Lemur as a Service
---------------------------
We recommend using whatever software you are most familiar with for managing Lemur processes. One option is
`Supervisor <http://supervisord.org/> `_ .
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Configure `` supervisord ``
~~~~~~~~~~~~~~~~~~~~~~~~~
Configuring Supervisor couldn't be more simple. Just point it to the `` lemur `` executable in your virtualenv's bin/
folder and you're good to go.
::
[program:lemur-web]
directory=/www/lemur/
command=/www/lemur/bin/lemur start
autostart=true
autorestart=true
redirect_stderr=true
stdout_logfile syslog
stderr_logfile syslog
See :ref: `Using Supervisor <UsingSupervisor>` for more details on using Supervisor.
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Syncing
-------
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Lemur uses periodic sync tasks to make sure it is up-to-date with its environment. As always things can change outside
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of Lemur, but we do our best to reconcile those changes.
.. code-block :: bash
$ crontab -e
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* 3 * * * lemur sync --all
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* 3 * * * lemur check_revoked
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Additional Utilities
--------------------
If you're familiar with Python you'll quickly find yourself at home, and even more so if you've used Flask. The
`` lemur `` command is just a simple wrapper around Flask's `` manage.py `` , which means you get all of the
power and flexibility that goes with it.
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Some of the features which you'll likely find useful are:
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lock
~~~~
Encrypts sensitive key material - This is most useful for storing encrypted secrets in source code.
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unlock
~~~~~~
Decrypts sensitive key material - Used to decrypt the secrets stored in source during deployment.
What's Next?
------------
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Get familiar with how Lemur works by reviewing the :doc: `../guide/index` . When you're ready
see :doc: `../production/index` for more details on how to configure Lemur for production.
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The above just gets you going, but for production there are several different security considerations to take into account.
Remember, Lemur is handling sensitive data and security is imperative.