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#!/usr/bin/env python
# vim: expandtab:tabstop=4:shiftwidth=4
import argparse
import ConfigParser
import sys
import os
class Cluster(object):
"""Python wrapper to ensure environment is correct for running ansible playbooks
"""
def __init__(self, args):
self.args = args
# setup ansible ssh environment
if 'ANSIBLE_SSH_ARGS' not in os.environ:
os.environ['ANSIBLE_SSH_ARGS'] = (
'-o ForwardAgent=yes'
' -o StrictHostKeyChecking=no'
' -o UserKnownHostsFile=/dev/null'
' -o ControlMaster=auto'
' -o ControlPersist=600s'
)
def apply(self):
# setup ansible playbook environment
config = ConfigParser.ConfigParser()
if 'gce' == self.args.provider:
config.readfp(open('inventory/gce/gce.ini'))
for key in config.options('gce'):
os.environ[key] = config.get('gce', key)
inventory = '-i inventory/gce/gce.py'
elif 'aws' == self.args.provider:
config.readfp(open('inventory/aws/ec2.ini'))
for key in config.options('ec2'):
os.environ[key] = config.get('ec2', key)
inventory = '-i inventory/aws/ec2.py'
else:
# this code should never be reached
raise argparse.ArgumentError("invalid PROVIDER {}".format(self.args.provider))
env = {'cluster_id': self.args.cluster_id}
if 'create' == self.args.action:
playbook = "playbooks/{}/openshift-cluster/launch.yml".format(self.args.provider)
env['masters'] = self.args.masters
env['nodes'] = self.args.nodes
elif 'terminate' == self.args.action:
playbook = "playbooks/{}/openshift-cluster/terminate.yml".format(self.args.provider)
elif 'list' == self.args.action:
# todo: implement cluster list
raise argparse.ArgumentError("ACTION {} not implemented".format(self.args.action))
elif 'update' == self.args.action:
# todo: implement cluster update
raise argparse.ArgumentError("ACTION {} not implemented".format(self.args.action))
else:
# this code should never be reached
raise argparse.ArgumentError("invalid ACTION {}".format(self.args.action))
verbose = ''
if self.args.verbose > 0:
verbose = '-{}'.format('v' * self.args.verbose)
ansible_env = '-e \'{}\''.format(
' '.join(['%s=%s' % (key, value) for (key, value) in env.items()])
)
command = 'ansible-playbook {} {} {} {}'.format(
verbose, inventory, ansible_env, playbook
)
if self.args.verbose > 1:
command = 'time {}'.format(command)
if self.args.verbose > 0:
sys.stderr.write('RUN [{}]\n'.format(command))
sys.stderr.flush()
error = os.system(command)
if error != 0:
raise Exception("Ansible run failed with exit code %d".format(error))
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Manage OpenShift Cluster')
parser.add_argument('-m', '--masters', default=1, type=int, help='number of masters to create in cluster')
parser.add_argument('-n', '--nodes', default=2, type=int, help='number of nodes to create in cluster')
parser.add_argument('-v', '--verbose', action='count', help='Multiple -v options increase the verbosity')
parser.add_argument('--version', action='version', version='%(prog)s 0.1')
parser.add_argument('action', choices=['create', 'terminate', 'update', 'list'])
parser.add_argument('provider', choices=['gce', 'aws'])
parser.add_argument('cluster_id', help='prefix for cluster VM names')
args = parser.parse_args()
Cluster(args).apply()
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