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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 and install the required gems:
git clone git://leap.se/leap_cli # clone leap_cli code
cd leap_cli
bundle # install required gems
Running from the source directory
--------------------------------------
To run the ``leap`` command directly from the source tree, symlink bin/leap
into your path:
cd leap_cli
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).
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.
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