Linuxリソース情報をPythonで取得する3つの方法

8229 ワード

方法一:psutilモジュールpsutil
#!usr/bin/env python
# -*- coding: utf-8 -*-

import socket
import psutil
class NodeResource(object):
    def get_host_info(self):
        host_name = socket.gethostname()
        return {'host_name':host_name}

    def get_cpu_state(self):
        cpu_count = psutil.cpu_count(logical=False)
        cpu_percent =(str)(psutil.cpu_percent(1))+'%'
        return {'cpu_count':cpu_count,'cpu_percent':cpu_percent}

    def get_memory_state(self):
        mem = psutil.virtual_memory()
        mem_total = mem.total / 1024 / 1024
        mem_free = mem.available /1024/1024
        mem_percent = '%s%%'%mem.percent
        return {'mem_toal':mem_total,'mem_free':mem_free,'mem_percent':mem_percent}

    def get_disk_state(self):
        disk_stat = psutil.disk_usage('/')
        disk_total = disk_stat.total
        disk_free = disk_stat.free
        disk_percent = '%s%%'%disk_stat.percent
        return {'mem_toal': disk_total, 'mem_free': disk_free, 'mem_percent': disk_percent}

方法二:proc proc
#!usr/bin/env python
# -*- coding: utf-8 -*-
import time
import os
from multiprocessing import cpu_count

class NodeResource(object):


    def usage_percent(self,use, total):
        #       
        try:
            ret = int(float(use)/ total * 100)
        except ZeroDivisionError:
            raise Exception("ERROR - zero division error")
        return '%s%%'%ret

    @property
    def cpu_stat(self,interval = 1):

        cpu_num = cpu_count()
        with open("/proc/stat", "r") as f:
            line = f.readline()
            spl = line.split(" ")
            worktime_1 = sum([int(i) for i in spl[2:]])
            idletime_1 = int(spl[5])
        time.sleep(interval)
        with open("/proc/stat", "r") as f:
            line = f.readline()
            spl = line.split(" ")
            worktime_2 = sum([int(i) for i in spl[2:]])
            idletime_2 = int(spl[5])

        dworktime = (worktime_2 - worktime_1)
        didletime = (idletime_2 - idletime_1)
        cpu_percent = self.usage_percent(dworktime - didletime,didletime)
        return {'cpu_count':cpu_num,'cpu_percent':cpu_percent}

    @property
    def disk_stat(self):
        hd = {}
        disk = os.statvfs("/")
        hd['available'] = disk.f_bsize * disk.f_bfree
        hd['capacity'] = disk.f_bsize * disk.f_blocks
        hd['used'] =  hd['capacity'] - hd['available']
        hd['used_percent'] = self.usage_percent(hd['used'], hd['capacity'])
        return hd

    @property
    def memory_stat(self):
        mem = {}
        with open("/proc/meminfo") as f:
            for line in f:
                line = line.strip()
                if len(line) < 2: continue
                name = line.split(':')[0]
                var = line.split(':')[1].split()[0]
                mem[name] = long(var) * 1024.0
            mem['MemUsed'] = mem['MemTotal'] - mem['MemFree'] - mem['Buffers'] - mem['Cached']
        mem['used_percent'] = self.usage_percent(mem['MemUsed'],mem['MemTotal'])
        return {'MemUsed':mem['MemUsed'],'MemTotal':mem['MemTotal'],'used_percent':mem['used_percent']}


nr = NodeResource()

print nr.cpu_stat
print '=================='
print nr.disk_stat
print '=================='
print nr.memory_stat

方法3:subprocess pipe,poen
from subprocess import Popen, PIPE
import os,sys

'''    ifconfig       '''
def getIfconfig():
    p = Popen(['ifconfig'], stdout = PIPE)
    data = p.stdout.read()
    return data

'''    dmidecode       '''
def getDmi():
    p = Popen(['dmidecode'], stdout = PIPE)
    data = p.stdout.read()
    return data

'''               '''
def parseData(data):
    parsed_data = []
    new_line = ''
    data = [i for i in data.split('
') if i] for line in data: if line[0].strip(): parsed_data.append(new_line) new_line = line + '
' else: new_line += line + '
' parsed_data.append(new_line) return [i for i in parsed_data if i] ''' ifconfig ip ''' def parseIfconfig(parsed_data): dic = {} parsed_data = [i for i in parsed_data if not i.startswith('lo')] for lines in parsed_data: line_list = lines.split('
') devname = line_list[0].split()[0] macaddr = line_list[0].split()[-1] ipaddr = line_list[1].split()[1].split(':')[1] break dic['ip'] = ipaddr return dic ''' dmi ''' def parseDmi(parsed_data): dic = {} parsed_data = [i for i in parsed_data if i.startswith('System Information')] parsed_data = [i for i in parsed_data[0].split('
')[1:] if i] dmi_dic = dict([i.strip().split(':') for i in parsed_data]) dic['vender'] = dmi_dic['Manufacturer'].strip() dic['product'] = dmi_dic['Product Name'].strip() dic['sn'] = dmi_dic['Serial Number'].strip() return dic ''' Linux ''' def getHostname(): with open('/etc/sysconfig/network') as fd: for line in fd: if line.startswith('HOSTNAME'): hostname = line.split('=')[1].strip() break return {'hostname':hostname} ''' Linux ''' def getOsVersion(): with open('/etc/issue') as fd: for line in fd: osver = line.strip() break return {'osver':osver} ''' CPU CPU ''' def getCpu(): num = 0 with open('/proc/cpuinfo') as fd: for line in fd: if line.startswith('processor'): num += 1 if line.startswith('model name'): cpu_model = line.split(':')[1].strip().split() cpu_model = cpu_model[0] + ' ' + cpu_model[2] + ' ' + cpu_model[-1] return {'cpu_num':num, 'cpu_model':cpu_model} ''' Linux ''' def getMemory(): with open('/proc/meminfo') as fd: for line in fd: if line.startswith('MemTotal'): mem = int(line.split()[1].strip()) break mem = '%.f' % (mem / 1024.0) + ' MB' return {'Memory':mem} if __name__ == '__main__': dic = {} data_ip = getIfconfig() parsed_data_ip = parseData(data_ip) ip = parseIfconfig(parsed_data_ip) data_dmi = getDmi() parsed_data_dmi = parseData(data_dmi) dmi = parseDmi(parsed_data_dmi) hostname = getHostname() osver = getOsVersion() cpu = getCpu() mem = getMemory() dic.update(ip) dic.update(dmi) dic.update(hostname) dic.update(osver) dic.update(cpu) dic.update(mem) ''' ''' for k,v in dic.items(): print '%-10s:%s' % (k, v)

top+Popen
from subprocess import Popen, PIPE
import time

'''    ifconfig       '''
# def getIfconfig():
#     p = Popen(['ipconfig'], stdout = PIPE)
#     data = p.stdout.read()
#     data = data.decode('cp936').encode('utf-8')
#     return data
#
# print(getIfconfig())

p = Popen(['top -n 2 -d |grep Cpu'],stdout= PIPE,shell=True)
data = p.stdout.read()
info = data.split('
')[1] info_list = info.split() cpu_percent ='%s%%'%int(float(info_list[1])+float(info_list[3])) print cpu_percent