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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2013, Darryl Stoflet <stoflet@gmail.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
ANSIBLE_METADATA = {'metadata_version': '1.1',
'status': ['preview'],
'supported_by': 'community'}
DOCUMENTATION = '''
---
module: monit
short_description: Manage the state of a program monitored via Monit
description:
- Manage the state of a program monitored via I(Monit)
version_added: "1.2"
options:
name:
description:
- The name of the I(monit) program/process to manage
required: true
default: null
state:
description:
- The state of service
required: true
default: null
choices: [ "present", "started", "stopped", "restarted", "monitored", "unmonitored", "reloaded" ]
timeout:
description:
- If there are pending actions for the service monitored by monit, then Ansible will check
for up to this many seconds to verify the requested action has been performed.
Ansible will sleep for five seconds between each check.
required: false
default: 300
version_added: "2.1"
requirements: [ ]
author: "Darryl Stoflet (@dstoflet)"
'''
EXAMPLES = '''
# Manage the state of program "httpd" to be in "started" state.
- monit:
name: httpd
state: started
'''
import time
import re
from ansible.module_utils.basic import AnsibleModule
def main():
arg_spec = dict(
name=dict(required=True),
timeout=dict(default=300, type='int'),
state=dict(required=True, choices=['present', 'started', 'restarted', 'stopped', 'monitored', 'unmonitored', 'reloaded'])
)
module = AnsibleModule(argument_spec=arg_spec, supports_check_mode=True)
name = module.params['name']
state = module.params['state']
timeout = module.params['timeout']
MONIT = module.get_bin_path('monit', True)
def monit_version():
rc, out, err = module.run_command('%s -V' % MONIT, check_rc=True)
version_line = out.split('\n')[0]
version = re.search("[0-9]+\.[0-9]+", version_line).group().split('.')
# Use only major and minor even if there are more these should be enough
return int(version[0]), int(version[1])
def is_version_higher_than_18():
return MONIT_MAJOR_VERSION > 3 or MONIT_MAJOR_VERSION == 3 and MONIT_MINOR_VERSION > 18
def parse(parts):
if is_version_higher_than_18():
return parse_current(parts)
else:
return parse_older_versions(parts)
def parse_older_versions(parts):
if len(parts) > 2 and parts[0].lower() == 'process' and parts[1] == "'%s'" % name:
return ' '.join(parts[2:]).lower()
else:
return ''
def parse_current(parts):
if len(parts) > 2 and parts[2].lower() == 'process' and parts[0] == name:
return ''.join(parts[1]).lower()
else:
return ''
def status():
"""Return the status of the process in monit, or the empty string if not present."""
rc, out, err = module.run_command('%s %s' % (MONIT, SUMMARY_COMMAND), check_rc=True)
for line in out.split('\n'):
# Sample output lines:
# Process 'name' Running
# Process 'name' Running - restart pending
parts = parse(line.split())
if parts != '':
return parts
return ''
def run_command(command):
"""Runs a monit command, and returns the new status."""
module.run_command('%s %s %s' % (MONIT, command, name), check_rc=True)
return status()
def wait_for_monit_to_stop_pending():
"""Fails this run if there is no status or it's pending/initializing for timeout"""
timeout_time = time.time() + timeout
sleep_time = 5
running_status = status()
while running_status == '' or 'pending' in running_status or 'initializing' in running_status:
if time.time() >= timeout_time:
module.fail_json(
msg='waited too long for "pending", or "initiating" status to go away ({0})'.format(
running_status
),
state=state
)
time.sleep(sleep_time)
running_status = status()
MONIT_MAJOR_VERSION, MONIT_MINOR_VERSION = monit_version()
SUMMARY_COMMAND = ('summary', 'summary -B')[is_version_higher_than_18()]
if state == 'reloaded':
if module.check_mode:
module.exit_json(changed=True)
rc, out, err = module.run_command('%s reload' % MONIT)
if rc != 0:
module.fail_json(msg='monit reload failed', stdout=out, stderr=err)
wait_for_monit_to_stop_pending()
module.exit_json(changed=True, name=name, state=state)
present = status() != ''
if not present and not state == 'present':
module.fail_json(msg='%s process not presently configured with monit' % name, name=name, state=state)
if state == 'present':
if not present:
if module.check_mode:
module.exit_json(changed=True)
status = run_command('reload')
if status == '':
wait_for_monit_to_stop_pending()
module.exit_json(changed=True, name=name, state=state)
module.exit_json(changed=False, name=name, state=state)
wait_for_monit_to_stop_pending()
running = 'running' in status()
if running and state in ['started', 'monitored']:
module.exit_json(changed=False, name=name, state=state)
if running and state == 'stopped':
if module.check_mode:
module.exit_json(changed=True)
status = run_command('stop')
if status in ['not monitored'] or 'stop pending' in status:
module.exit_json(changed=True, name=name, state=state)
module.fail_json(msg='%s process not stopped' % name, status=status)
if running and state == 'unmonitored':
if module.check_mode:
module.exit_json(changed=True)
status = run_command('unmonitor')
if status in ['not monitored'] or 'unmonitor pending' in status:
module.exit_json(changed=True, name=name, state=state)
module.fail_json(msg='%s process not unmonitored' % name, status=status)
elif state == 'restarted':
if module.check_mode:
module.exit_json(changed=True)
status = run_command('restart')
if status in ['initializing', 'running'] or 'restart pending' in status:
module.exit_json(changed=True, name=name, state=state)
module.fail_json(msg='%s process not restarted' % name, status=status)
elif not running and state == 'started':
if module.check_mode:
module.exit_json(changed=True)
status = run_command('start')
if status in ['initializing', 'running'] or 'start pending' in status:
module.exit_json(changed=True, name=name, state=state)
module.fail_json(msg='%s process not started' % name, status=status)
elif not running and state == 'monitored':
if module.check_mode:
module.exit_json(changed=True)
status = run_command('monitor')
if status not in ['not monitored']:
module.exit_json(changed=True, name=name, state=state)
module.fail_json(msg='%s process not monitored' % name, status=status)
module.exit_json(changed=False, name=name, state=state)
if __name__ == '__main__':
main()
|
