an ansible inventory garnered from fleetctl

plugins/inventory/fleet.py

+#!/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 Vagrant servers for Ansible")
+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("[^\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]
+        result
+
+    print json.dumps(result)
+    sys.exit(1)
+
+
+# Print out help
+#------------------------------
+else:
+    parser.print_help()
+    sys.exit(1)