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About LEAP command line interface
=================================
This gem installs an executable 'leap' that allows you to manage servers using the leap platform.
Installation
=================================
Prerequisites:
sudo apt-get install ruby ruby-dev rsync openssh-client
To install leap command system-wide:
sudo gem install leap_cli
To install without root privileges:
gem install leap_cli --user-install
To run from a clone of the git repo, see "Development", below.
Usage
=================================
Run `leap help` for a usage instructions.
Here is an example usage:
leap new-provider provider
cd provider
edit configuration files (see below)
leap compile
Directories and Files
=================================
The general structure of leap project looks like this:
my_leap_project/ # your project directory
leap_platform/ # a clone of the leap_platform puppet recipes
provider/ # your provider-specific configurations
The "leap" command should be run from within the "provider" directory.
Within the "provider" directory:
nodes/ # one configuration file per node (i.e. server)
services/ # nodes inherit from these files if specified in node config.
tags/ # nodes inherit from these files if specified in node config.
files/ # text and binary files needed for services and nodes, including keypairs
users/ # crypto key material for sysadmins
common.yaml # all nodes inherit these options
provider.yaml # global service provider definition
Configuration Files
=================================
All configuration files are in JSON format. For example
{
"key1": "value1",
"key2": "value2"
}
Keys should match /[a-z0-9_]/
Unlike traditional JSON, comments are allowed. If the first non-whitespace character is '#' the line is treated as a comment.
# this is a comment
{
# this is a comment
"key": "value" # this is an error
}
Options in the configuration files might be nested. For example:
{
"openvpn": {
"ip_address": "1.1.1.1"
}
}
If the value string is prefixed with an '=' character, the value is evaluated as ruby. For example
{
"domain": {
"public": "domain.org"
}
"api_domain": "= 'api.' + domain.public"
}
In this case, "api_domain" will be set to "api.domain.org".
The following methods are available to the evaluated ruby:
* nodes -- A list of all nodes. This list can be filtered.
* global.services -- A list of all services.
* global.tags -- A list of all tags.
* file(file_path) -- Inserts the full contents of the file. If the file is an erb
template, it is rendered. The file is searched for by first checking platform
and then provider/files,
* variable -- Any variable inherited by a particular node is available
by just referencing it using either hash notation or object notation
(i.e. self['domain']['public'] or domain.public). Circular
references are not allowed, but otherwise it is ok to nest
evaluated values in other evaluated values.
Node Configuration
=================================
The name of the file will be the hostname of the node.
An example configuration "nodes/dns-europe.json"
{
"services": "dns",
"tags": ["production", "europe"],
"ip_address": "1.1.1.1"
}
This node will have hostname "dns-europe" and it will inherit from the following files (in this order):
common.json
services/dns.json
tags/europe.json
tags/production.json
Development
=================================
How to set up your environment for developing the ``leap`` command.
Prerequisites
---------------------------------
Debian Squeeze
sudo apt-get install git ruby ruby-dev rubygems
sudo gem install bundler rake
export PATH=$PATH:/var/lib/gems/1.8/bin
Debian Wheezy
sudo apt-get install git ruby ruby-dev bundler
Ubuntu
sudo apt-get install git ruby ruby-dev
sudo gem install bundler
Install from git
--------------------------------------
Download the source:
git clone git://leap.se/leap_cli # clone leap_cli code
cd leap_cli
Running as a gem
--------------------------------------
To install ``leap`` as a gem, do this:
cd leap_cli
rake build
rake install
And then make sure your PATH is set to include where leap is installed.
It should warn you if this is not the case.
Running from the source directory
--------------------------------------
To run the ``leap`` command directly from the source tree, you need to install
the required gems using ``bundle`` and symlink ``bin/leap`` into your path:
cd leap_cli
bundle # install required gems
ln -s `pwd`/bin/leap ~/bin # link executable somewhere in your bin path
which leap # make sure you will run leap_cli/bin/leap
leap help
If you get an error, make sure to check ``which leap``. Some versions of ``bundle`` will
incorrectly install a broken ``leap`` command in the gem bin directory when you do ``bundle``.
Why not use ``bundle exec leap`` to run the command? This works, so long as your current
working directory is under leap_cli. Because the point is to be able to run ``leap`` in
other places, it is easier to create the symlink. If you run ``leap`` directly, and not via
the command launcher that rubygems installs, leap will run in a mode that simulates
``bundle exec leap`` (i.e. only gems included in Gemfile are allow to be loaded).
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