Python编写的memcached启动脚本
#/usr/bin/env python# -*- coding:utf-8 -*-
# @time :2018/1/12 21:18
# @Author :FengXiaoqing
# @file :rc-d.py
import os
import sys
from subprocess import Popen,PIPE
class Process(object):
'''memcached rc script'''
args = {'USER':'memcached',
'PORT':11211,
'MAXCONN':1024,
'CACHESIZE':64,
'OPTIONS': ''}
def __init__(self,name,program,workdir):
self.name = name
self.program = program
self.workdir = workdir
def _init(self):
'''/var/tmp/memcached'''
if not os.path.exists(self.workdir):
os.mkdir(self.workdir)
os.chdir(self.workdir)
def _pidFile(self):
'''/var/tmp/memcached/memcached.pid'''
return os.path.join(self.workdir,"%s.pid" % self.name)
def _writhPid(self):
if self.pid:
with open(self._pidFile(),'w') as fd:
fd.write(str(self.pid))
def _readConf(self,f):
with open(f) as fd:
lines = fd.readlines()
return dict()
def _parseArgs(self):
conf = self._readConf('/etc/sysconfig/memcached')
if 'USER' in conf:
self.args['USER'] = conf['USER']
if 'PORT' in conf:
self.args['PORT'] = conf['PORT']
if 'MAXCONN' in conf:
self.args['MAXCONN'] = conf['MAXCONN']
if 'CACHESIZE' in conf:
self.args['CACHESIZE'] = conf['CACHESIZE']
options = ['-u',self.args['USER'],
'-p',self.args['PORT'],
'-m',self.args['MAXCONN'],
'-c',self.args['CACHESIZE']]
return options
def start(self):
pid = self._getPid()
if pid:
print "%s is already runnig..." % self.name
sys.exit()
self._init()
cmd = +self._parseArgs()+['-d','-P',self._pidFile()]
p = Popen(cmd,stdout=PIPE)
print "%s start Sucessful.." % self.name
def _getPid(self):
p = Popen(['pidof',self.name],stdout = PIPE)
pid = p.stdout.read().strip()
return pid
def stop(self):
pid = self._getPid()
if pid:
os.kill(int(pid),15)
if os.path.exists(self._pidFile()):
os.remove(self._pidFile())
print ("%s is stopped .") % self.name
def restart(self):
self.stop()
self.start()
def status(self):
pid = self._getPid()
if pid:
print "%s is already running..." % self.name
else:
print "%s is not running..." % self.name
def help(self):
print ("Usage: %s {start|stop|status|restart}") % __file__
def main():
name = 'memcached'
prog = '/usr/bin/memcached'
wd = '/var/tmp/memcached'
pm = Process(name = name,
program=prog,
workdir=wd)
try:
cmd = sys.argv
except IndexError,e:
print ("Optionerror")
sys.exit()
if cmd == 'start':
pm.start()
elif cmd == 'stop':
pm.stop()
elif cmd == 'restart':
pm.restart()
elif cmd == 'status':
pm.status()
else:
pm.help()
if __name__ == '__main__':
main()
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