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Instance and release management made easy
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README.rst

gonzo

Instance and release management made easy

Manage instances running in Amazon Web Services or using Openstack using a single consistent interface:

$ gonzo launch production-web-app
...
$ gonzo list

name                               type        status    owner          uptime             location

production-web-app-001             m1.small    RUNNING   tom            0d 0h 1m 18s       eu-west-1b
production-web-db-001              m3.medium   RUNNING   amit           27d 1h 8m 13s      eu-west-1a

Easily target instances or groups of instances with fab commands and manage your code deployments using included fabric tasks:

$ fab gonzo.group:production-ecommerce-web push_release rollforward

Configuration

Setup your clouds

Command Line Interface

Having setup multiple cloud environments and/or regions within, use the gonzo config command to chose where you want to deploy servers or projects to:

$ gonzo config
cloud: None
region: None
$ gonzo config --cloud aws
cloud: aws
region: us-west-1
$ gonzo config --region eu-west-1
cloud: aws
region: eu-west-1

Managing the instance lifecycle

Having chosen the cloud and region you want to work within you can issue gonzo commands to control the spinning up, monitoring and termination of instances within.

To see a list of all running instance in the region:

$ gonzo list
name                               type        status    owner          uptime             location

production-web-app-001             m1.small    RUNNING   tom            408d 0h 42m 18s    eu-west-1a
production-web-app-002             m3.medium   RUNNING   amit           27d 1h 8m 13s      eu-west-1b
production-web-db-011              m3.medium   RUNNING   amit           160d 2h 33m 18s    eu-west-1c

To add a new instance to the region, specifying the server type - having defined server types, and their sizes in your config:

$ gonzo launch production-web

To get more info on the commands available:

$ gonzo --help

Using gonzo with fabric

You can then use gonzo to set a target server (or group of servers) for fabric commands.

Import gonzo in your fabfile to extend fab with gonzo functionality:

$ cat fabfile.py

from gonzo.tasks import gonzo
__all__ = ['gonzo']

You can then run a command on a single instance, specifying it through gonzo:

$ fab gonzo.instance:production-web-003 run_command

Or run the command on a group of instances:

$ fab gonzo.group:production-web run_command

Fabric task library

To use the gonzo library of fabric tasks, simply import the relevant task modules for namespaced tasks into your fabfile:

from gonzo.tasks import apache

These can then be called using the standard fabric syntax:

$ fab gonzo.group:production-web apache.restart

Alternatively import the tasks directly:

from gonzo.tasks.apache import restart

These commands won't be namespaced:

$ fab gonzo.group:production-web restart

You can extend the functionality by patching your own commands into the gonzo namespaces to provide a clean CLI:

# ~/apache_maintenance_mode.py
from fabric.api import task, sudo
from gonzo.tasks import apache

def maintenance_mode(off=False):
    """ Set server into maintenance mode.
    """

    if off:
        sudo("a2ensite onefinestay && a2dissite 00maintenance")
    else:
        sudo("a2ensite 00maintenance && a2dissite onefinestay")

apache.maintenance_mode = task(maintenance_mode)

Using Gonzo With CloudInit

CloudInit can be used to personalise the instances you launch. The user data scripts passed to new instances for CloudInit to process can be specified for each cloud by using the DEFAULT_USER_DATA config item in config.py:

CLOUDS = {
    'cloudname': {

        ...
        'DEFAULT_USER_DATA': 'http://example.com/my-cloudinit-config.txt',
        ...

Additionally, user data scripts can be specified per instance by using the launch argument --user-data <file | url>:

# gonzo launch --user-data ~/.gonzo/cloudinit_web_app production-web-app

User data scripts can be specified as a file path or URL.

Before user data scripts are passed to new instances, they're first rendered as a template, allowing them to be parameterised. By default a few are already available, such as hostname, domain and fqdn. These can be supplemented by defining a USER_DATA_PARAMS cloud config dictionary:

CLOUDS = {
    'cloudname': {

        ...
        'DEFAULT_USER_DATA': 'http://example.com/my-cloudinit-config.txt',
        'USER_DATA_PARAMS': {
            'puppet_address': 'puppetmaster.example.com',
        }
        ...

Again, these parameters can also be supplemented or overridden at launch time by using the command line argument --user-data-params key=val[,key=val..]:

# gonzo launch --user-data ~/.gonzo/cloudinit_web_app \
    --user-data-params puppet_address=puppetmaster2.example.com \
    production-web-app

TODO

  • project based stuff
    • project name [for /srv/project_name] (git setting?)
    • Document how to use for release control

Build status

https://secure.travis-ci.org/onefinestay/gonzo.png?branch=master

License

Apache 2.0 - see LICENSE for details

More Docs

Full documentation on Read the Docs

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