python—memcached启动脚本

一、一般模式

启动选项：start、stop、restart、status

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109 #!/usr/bin/env python#encoding:utf-8 import sysimport osfrom subprocess import Popen, PIPE class Process(object): '''memcached rc script''' def __init__(self,name,program,argv,workdir): # 初始化类，包含：self、程序名、程序启动文件、执行参数、pid文件路径 self.name = name self.program = program self.argv = argv self.workdir = workdir def __workDir(self): # 判断pid文件路径，没有则创建 '''/var/tmp/memcached''' if not os.path.exists("/var/tmp/memcached"): os.mkdir("/var/tmp/memcached") os.chdir("/var/tmp/memcached") def __pidFile(self): # 获取pid文件，带路径 '''/var/tmp/memcached/memcached.pid''' return os.path.join(self.workdir,"%s.pid" % self.name) def __writePid(self): # 将pid写进pid文件中，pid为字符串类型 if self.pid: with open(self.__pidFile(),"w") as fd: fd.write(str(self.pid)) def start(self): pid = self.__getPid() # 判断进程，如已存在则退出 if pid: print ("%s is running" % self.name) sys.exit() self.__workDir() cmd = self.program + " " + self.argv p = Popen(cmd,stdout=PIPE,shell=True) # 启动进程方式 self.pid = p.pid # 加self,声明为类的属性，便于其他内部函数调用 self.__writePid() print("%s start successful" % self.name) def __getPid(self): p = Popen(["pidof",self.name],stdout=PIPE) # 获取pid方式 pid = p.stdout.read().strip() # 过滤pid return pid def stop(self): pid = self.__getPid() if pid: os.kill(int(pid),15) # 杀掉进程方式，pid为数值类型 if os.path.exists(self.__pidFile()): os.remove(self.__pidFile()) # 删掉pid文件 print("%s is stopped" % self.name) def restart(self): self.stop() self.start() def status(self): pid = self.__getPid() if pid: print ("%s is running" % self.name) else: print ("%s is not running" % self.name) def help(self): print ("Usage: %s {start|stop|restart|status}" % __file__) def main(): name = "memcached" program = "/data/program/memcached/bin/memcached" workdir = "/var/tmp/memcached" argv = "-u nobody -p 11211 -c 1024 -m 64" pm = Process(name = name, program = program, workdir = workdir, argv = argv) # 传参，也可以按顺序只写实参 try: cmd = sys.argv[1] # 如启动参数有误，则抛出异常,并退出 except Exception as e: raise e 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()

二、后台模式

说明：后台方式：-d -P XXX.pid ；如有配置文件，则配置文件参数替换掉默认参数

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137 #!/usr/bin/env python#encoding:utf-8 import sysimport osfrom subprocess import Popen, PIPE class Process(object): '''memcached rc script''' argv = {"USER": "memcached", "PORT": "11211", "MAXCONN": "1024", "CACHESIZE": "64", "OPTIONS": ""} # 默认启动参数 def __init__(self,name,program,workdir): # 初始化类，包含：self、程序名、程序启动文件、pid文件路径 self.name = name self.program = program self.workdir = workdir def __readConf(self,f): # 读取配置文件，返回字典 with open(f,"r") as fd: lines = fd.readlines() return dict([i.strip().split("=") for i in lines]) def __parseArgv(self): # 配置文件替换默认参数 '''/etc/sysconfig/memcached''' conf = self.__readConf("/etc/sysconfig/memcached") if "USER" in conf: self.argv["USER"] = conf["USER"] if "PORT" in conf: self.argv["PORT"] = conf["PORT"] if "MAXCONN" in conf: self.argv["MAXCONN"] = conf["MAXCONN"] if "CACHESIZE" in conf: self.argv["CACHESIZE"] = conf["CACHESIZE"] options = ["-u",self.argv["USER"], "-p",self.argv["PORT"], "-m",self.argv["CACHESIZE"], "-c",self.argv["MAXCONN"]] # 替换的参数，以列表形式返回 os.system("chown %s %s" % (self.argv["USER"],self.workdir)) # 修改pid文件目录的属主为启动用户，才能写pid文件 print ("启动参数为：%s" % str(options)) return options def __workDir(self): # 判断pid文件路径，没有则创建 '''/var/tmp/memcached''' if not os.path.exists("/var/tmp/memcached"): os.mkdir("/var/tmp/memcached") os.chdir("/var/tmp/memcached") def __pidFile(self): # 获取pid文件，带路径 '''/var/tmp/memcached/memcached.pid''' return os.path.join(self.workdir,"%s.pid" % self.name) def start(self): pid = self.__getPid() if pid: print ("%s is running" % self.name) sys.exit() self.__workDir() cmd = [self.program] + self.__parseArgv() + ["-d", "-P", self.__pidFile()] # 启动参数，后台启动方式，按指定文件自动写pid p = Popen(cmd,stdout=PIPE) # 启动进程方式 print("%s start successful" % self.name) def __getPid(self): p = Popen(["pidof",self.name],stdout=PIPE) # 获取pid方式 pid = p.stdout.read().strip() # 过滤pid return pid def stop(self): pid = self.__getPid() if pid: os.kill(int(pid),15) # 杀掉进程方式，pid为数值类型 if os.path.exists(self.__pidFile()): os.remove(self.__pidFile()) # 删掉pid文件 print("%s is stopped" % self.name) def restart(self): self.stop() self.start() def status(self): pid = self.__getPid() if pid: print ("%s is running" % self.name) else: print ("%s is not running" % self.name) def help(self): print ("Usage: %s {start|stop|restart|status}" % __file__) def main(): name = "memcached" program = "/data/program/memcached/bin/memcached" workdir = "/var/tmp/memcached" pm = Process(name = name, program = program, workdir = workdir) # 传参，也可以按顺序只写实参 try: cmd = sys.argv[1] # 如启动参数有误，则抛出异常,并退出 except Exception as e: raise e 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()

python—memcached启动脚本

Python相关栏目本月热门文章