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Standardizing the module

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This commit is contained in:
Nikhil Singh 2012-07-30 14:48:24 +05:30 committed by Michael DeHaan
parent 61780e0980
commit aca860df9c
1 changed files with 40 additions and 95 deletions
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135
library/service
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@ -17,29 +17,10 @@
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
try:
import json
except ImportError:
import simplejson as json
import sys
import shlex
import subprocess
import os.path
import syslog
# TODO: switch to fail_json and other helper functions
# like other modules are using
# ===========================================
SERVICE = None
CHKCONFIG = None
def fail_json(d):
print json.dumps(d)
sys.exit(1)
def _find_binaries():
def _find_binaries(m):
# list of possible paths for service/chkconfig binaries
# with the most probable first
global CHKCONFIG
@ -63,11 +44,11 @@ def _find_binaries():
elif location.get('update-rc.d', None):
CHKCONFIG = location['update-rc.d']
else:
fail_json(dict(failed=True, msg='unable to find chkconfig or update-rc.d binary'))
m.fail_json(msg='unable to find chkconfig or update-rc.d binary')
if location.get('service', None):
SERVICE = location['service']
else:
fail_json(dict(failed=True, msg='unable to find service binary'))
m.fail_json(msg='unable to find service binary')
if location.get('initctl', None):
INITCTL = location['initctl']
else:
@ -145,56 +126,36 @@ def _do_enable(name, enable):
return rc, stdout, stderr
argfile = sys.argv[1]
args = open(argfile, 'r').read()
items = shlex.split(args)
syslog.openlog('ansible-%s' % os.path.basename(__file__))
syslog.syslog(syslog.LOG_NOTICE, 'Invoked with %s' % args)
def main():
module = AnsibleModule(
argument_spec = dict(
name = dict(required=True),
state = dict(choices=['running', 'started', 'stopped', 'restarted', 'reloaded']),
list_items = dict(choices=['status']),
enable = dict(choices=['on', 'off', 'true', 'false', 'yes', 'no', 'enable', 'disable', 'none'])
)
)
if not len(items):
fail_json(dict(failed=True, msg='this module requires arguments (-a)'))
p = module.params
name = p['name']
state = p.get('state', None)
list_items = p.get('list_items', None)
enable = p.get('enable', None)
params = {}
for arg in items:
if "=" not in arg:
fail_json(dict(failed=True, msg='expected key=value format arguments'))
# ===========================================
# find binaries locations on minion
_find_binaries(module)
(name, value) = arg.split("=")
params[name] = value
# ===========================================
# get service status
running = _get_service_status(name)
name = params.get('name', None)
if name is None:
fail_json(dict(failed=True, msg='missing name'))
state = params.get('state', None)
list_items = params.get('list', None)
enable = params.get('enabled', params.get('enable', None))
# running and started are the same
if state and state.lower() not in [ 'running', 'started', 'stopped', 'restarted','reloaded' ]:
fail_json(dict(failed=True, msg='invalid value for state'))
if list_items and list_items.lower() not in [ 'status' ]:
fail_json(dict(failed=True, msg='invalid value for list'))
if enable and enable.lower() not in [ 'on', 'off', 'true', 'false', 'yes', 'no', 'enable', 'disable' ]:
fail_json(dict(failed=True, msg='invalid value for enable'))
# ===========================================
# find binaries locations on minion
_find_binaries()
# ===========================================
# get service status
running = _get_service_status(name)
if state or enable:
rc = 0
out = ''
err = ''
# ===========================================
# Some common variables
changed = False
rc = 0
err = ''
out = ''
if enable:
rc_enable, out_enable, err_enable = _do_enable(name, enable)
@ -203,30 +164,24 @@ if state or enable:
err += err_enable
if state and running == None:
print json.dumps({
"failed" : True,
"msg" : "failed determining the current service state => state stays unchanged",
"changed": False
})
sys.exit(1)
module.fail_json(msg="failed determining the current service state => state stays unchanged", changed=False)
elif state:
# a state change command has been requested
# ===========================================
# determine if we are going to change anything
if not running and state in ("started", "running"):
if not running and state in ["started", "running"]:
changed = True
elif running and state in ("stopped","reloaded"):
elif running and state in ["stopped","reloaded"]:
changed = True
elif state == "restarted":
changed = True
# ===========================================
# run change commands if we need to
if changed:
if state in ('started', 'running'):
if state in ['started', 'running']:
rc_state, stdout, stderr = _run("%s %s start" % (SERVICE, name))
elif state == 'stopped':
rc_state, stdout, stderr = _run("%s %s stop" % (SERVICE, name))
@ -244,27 +199,17 @@ if state or enable:
rc = rc + rc_state
if rc != 0:
print json.dumps({
"failed" : True,
"rc" : rc,
})
sys.exit(1)
# ===============================================
# success
module.fail_json(msg=err)
result = {"changed": changed}
rc, stdout, stderr = _run("%s %s status" % (SERVICE, name))
if list_items and list_items in [ 'status' ]:
if list_items == 'status':
result['status'] = stdout
print json.dumps(result)
else:
print json.dumps(dict(failed=True, msg="expected state or list parameters"))
module.exit_json(**result);
sys.exit(0)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()