1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
#!/usr/bin/env python
# vim: expandtab:tabstop=4:shiftwidth=4
import argparse
import ConfigParser
import sys
import os
class Cluster(object):
"""
Control and Configuration Interface for OpenShift Clusters
"""
def __init__(self):
# 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 create(self, args):
"""
Create an OpenShift cluster for given provider
:param args: command line arguments provided by user
:return: exit status from run command
"""
env = {'cluster_id': args.cluster_id}
playbook = "playbooks/{}/openshift-cluster/launch.yml".format(args.provider)
inventory = self.setup_provider(args.provider)
env['masters'] = args.masters
env['nodes'] = args.nodes
return self.action(args, inventory, env, playbook)
def terminate(self, args):
"""
Destroy OpenShift cluster
:param args: command line arguments provided by user
:return: exit status from run command
"""
env = {'cluster_id': args.cluster_id}
playbook = "playbooks/{}/openshift-cluster/terminate.yml".format(args.provider)
inventory = self.setup_provider(args.provider)
return self.action(args, inventory, env, playbook)
def list(self, args):
"""
List VMs in cluster
:param args: command line arguments provided by user
:return: exit status from run command
"""
raise NotImplementedError("ACTION [{}] not implemented".format(sys._getframe().f_code.co_name))
def update(self, args):
"""
Update OpenShift across clustered VMs
:param args: command line arguments provided by user
:return: exit status from run command
"""
raise NotImplementedError("ACTION [{}] not implemented".format(sys._getframe().f_code.co_name))
def setup_provider(self, provider):
"""
Setup ansible playbook environment
:param provider: command line arguments provided by user
:return: path to inventory for given provider
"""
config = ConfigParser.ConfigParser()
if 'gce' == 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' == 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 ValueError("invalid PROVIDER {}".format(provider))
return inventory
def action(self, args, inventory, env, playbook):
"""
Build ansible-playbook command line and execute
:param args: command line arguments provided by user
:param inventory: derived provider library
:param env: environment variables for kubernetes
:param playbook: ansible playbook to execute
:return: exit status from ansible-playbook command
"""
verbose = ''
if args.verbose > 0:
verbose = '-{}'.format('v' * 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 args.verbose > 1:
command = 'time {}'.format(command)
if args.verbose > 0:
sys.stderr.write('RUN [{}]\n'.format(command))
sys.stderr.flush()
return os.system(command)
if __name__ == '__main__':
"""
Implemented to support writing unit tests
"""
cluster = Cluster()
providers = ['gce', 'aws']
parser = argparse.ArgumentParser(
description='Python wrapper to ensure proper environment for OpenShift ansible playbooks',
)
parser.add_argument('-v', '--verbose', action='count', help='Multiple -v options increase the verbosity')
parser.add_argument('--version', action='version', version='%(prog)s 0.2')
meta_parser = argparse.ArgumentParser(add_help=False)
meta_parser.add_argument('provider', choices=providers, help='provider')
meta_parser.add_argument('cluster_id', help='prefix for cluster VM names')
action_parser = parser.add_subparsers(dest='action', title='actions', description='Choose from valid actions')
create_parser = action_parser.add_parser('create', help='Create a cluster', parents=[meta_parser])
create_parser.add_argument('-m', '--masters', default=1, type=int, help='number of masters to create in cluster')
create_parser.add_argument('-n', '--nodes', default=2, type=int, help='number of nodes to create in cluster')
create_parser.set_defaults(func=cluster.create)
terminate_parser = action_parser.add_parser('terminate', help='Destroy a cluster', parents=[meta_parser])
terminate_parser.add_argument('-f', '--force', action='store_true', help='Destroy cluster without confirmation')
terminate_parser.set_defaults(func=cluster.terminate)
update_parser = action_parser.add_parser('update', help='Update OpenShift across cluster', parents=[meta_parser])
update_parser.add_argument('-f', '--force', action='store_true', help='Update cluster without confirmation')
update_parser.set_defaults(func=cluster.update)
list_parser = action_parser.add_parser('list', help='List VMs in cluster', parents=[meta_parser])
list_parser.set_defaults(func=cluster.list)
args = parser.parse_args()
if 'terminate' == args.action and not args.force:
answer = raw_input("This will destroy the ENTIRE {} environment. Are you sure? [y/N] ".format(args.cluster_id))
if answer not in ['y', 'Y']:
sys.stderr.write('\nACTION [terminate] aborted by user!\n')
exit(1)
if 'update' == args.action and not args.force:
answer = raw_input("This is destructive and could corrupt {} environment. Continue? [y/N] ".format(args.cluster_id))
if answer not in ['y', 'Y']:
sys.stderr.write('\nACTION [update] aborted by user!\n')
exit(1)
status = args.func(args)
if status != 0:
sys.stderr.write("ACTION [{}] failed with exit status {}\n".format(args.action, status))
exit(status)
|
