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Enhanced the service state recognition in the service module:

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- Added Upstart support
- Added an initial unknown state
- Prevented state changes when the current state is not recognized
- Changed the keyword recognition to a safer method
This commit is contained in:
Ingo Gottwald 2012-06-17 15:55:26 +02:00
parent 2cabbd50fc
commit abe33a5881
1 changed files with 58 additions and 15 deletions
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73
library/service
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@ -44,8 +44,9 @@ def _find_binaries():
# with the most probable first
global CHKCONFIG
global SERVICE
global INITCTL
paths = ['/sbin', '/usr/sbin', '/bin', '/usr/bin']
binaries = [ 'service', 'chkconfig', 'update-rc.d' ]
binaries = [ 'service', 'chkconfig', 'update-rc.d', 'initctl']
location = dict()
for binary in binaries:
@ -67,7 +68,55 @@ def _find_binaries():
SERVICE = location['service']
else:
fail_json(dict(failed=True, msg='unable to find service binary'))
if location.get('initctl', None):
INITCTL = location['initctl']
else:
INITCTL = None
def _get_service_status(name):
rc, status_stdout, status_stderr = _run("%s %s status" % (SERVICE, name))
status = status_stdout + status_stderr
# set the running state to None because we don't know it yet
running = None
# Check if we got upstart on the system and then the job state
if INITCTL != None:
# check the job status by upstart response
initctl_rc, initctl_status_stdout, initctl_status_stderr = _run("%s status %s" % (INITCTL, name))
if initctl_status_stdout.find("stop/waiting") != -1:
running = False
elif initctl_status_stdout.find("start/running") != -1:
running = True
# if the job status is still not known check it by response code
if running == None:
if rc == 3:
running = False
elif rc == 0:
running = True
# if the job status is still not known check it by status output keywords
if running == None:
# first tranform the status output that could irritate keyword matching
cleaned_status_stdout = status_stdout.lower().replace(name.lower(),'')
if cleaned_status_stdout.find("stop") != -1:
running = False
elif cleaned_status_stdout.find("run") != -1 and cleaned_status_stdout.find("not") != -1:
running = False
elif cleaned_status_stdout.find("run") != -1 and cleaned_status_stdout.find("not") == -1:
running = True
elif cleaned_status_stdout.find("start") != -1 and cleaned_status_stdout.find("not") == -1:
running = True
# if the job status is still not known check it by special conditions
if running == None:
if name == 'iptables' and status_stdout.find("ACCEPT") != -1:
# iptables status command output is lame
# TODO: lookup if we can use a return code for this instead?
running = True
return running
def _run(cmd):
# returns (rc, stdout, stderr) from shell command
@ -135,20 +184,8 @@ _find_binaries()
# ===========================================
# get service status
running = _get_service_status(name)
rc, status_stdout, status_stderr = _run("%s %s status" % (SERVICE, name))
status = status_stdout + status_stderr
running = False
if status_stdout.find("stopped") != -1 or rc == 3:
running = False
elif status_stdout.find("running") != -1 or rc == 0:
running = True
elif name == 'iptables' and status_stdout.find("ACCEPT") != -1:
# iptables status command output is lame
# TODO: lookup if we can use a return code for this instead?
running = True
if state or enable:
rc = 0
@ -162,7 +199,13 @@ if state or enable:
out += out_enable
err += err_enable
if state:
if state and running == None:
print json.dumps({
"failed" : True,
"msg" : "failed determining the current service state => state stays unchanged",
})
print >> sys.stderr, out + err
elif state:
# a state change command has been requested
# ===========================================