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#!/usr/bin/env python
"""
fleetctl base external inventory script. Automatically finds the IPs of the booted coreos instances and
returns it under the host group 'coreos'
"""
# Copyright (C) 2014 Andrew Rothstein <andrew.rothstein at gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Thanks to the vagrant.py inventory script for giving me the basic structure
# of this.
#
import sys
import subprocess
import re
import string
from optparse import OptionParser
try:
import json
except:
import simplejson as json
# Options
# ------------------------------
parser = OptionParser(usage="%prog [options] --list | --host <machine>")
parser.add_option('--list', default=False, dest="list", action="store_true",
help="Produce a JSON consumable grouping of servers in your fleet")
parser.add_option('--host', default=None, dest="host",
help="Generate additional host specific details for given host for Ansible")
(options, args) = parser.parse_args()
#
# helper functions
#
def get_ssh_config():
configs = []
for box in list_running_boxes():
config = get_a_ssh_config(box)
configs.append(config)
return configs
# list all the running instances in the fleet
def list_running_boxes():
boxes = []
for line in subprocess.check_output(["fleetctl", "list-machines"]).split('\n'):
matcher = re.search(r"[^\s]+[\s]+([^\s]+).+", line)
if matcher and matcher.group(1) != "IP":
boxes.append(matcher.group(1))
return boxes
def get_a_ssh_config(box_name):
config = {}
config['Host'] = box_name
config['ansible_ssh_user'] = 'core'
config['ansible_python_interpreter'] = '/opt/bin/python'
return config
# List out servers that vagrant has running
# ------------------------------
if options.list:
ssh_config = get_ssh_config()
hosts = {'coreos': []}
for data in ssh_config:
hosts['coreos'].append(data['Host'])
print(json.dumps(hosts))
sys.exit(1)
# Get out the host details
# ------------------------------
elif options.host:
result = {}
ssh_config = get_ssh_config()
details = filter(lambda x: (x['Host'] == options.host), ssh_config)
if len(details) > 0:
# pass through the port, in case it's non standard.
result = details[0]
print(json.dumps(result))
sys.exit(1)
# Print out help
# ------------------------------
else:
parser.print_help()
sys.exit(1)
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