python的kvm虚拟机状态值监控

python获取kvm虚拟机状态值
测试代码，其中只包含了基本的信息，所有的信息都是通过libvirt的api来获取的。
import libvirt
import memcache
import os
import time
from xml.etree import ElementTree as ET

mc = memcache.Client(['192.168.0.112:11211'])
while True:
conn = libvirt.open('qemu:///system')

dom = conn.listDomainsID()
for i in dom:
vmm_id = conn.lookupByID(i)
vmm_name = vmm_id.name()
if "wrksp" in vmm_name:
try:
# vmm_namevmm_name_id = vmm_name.split('-')[1]
vmm_id_str = str(vmm_name)
vmmid = vmm_id_str.split('-')[1]
print vmmid
vmm_dom_xml = vmm_id.XMLDesc(0)
vmm_xml_name = vmm_id_str + '.' + 'xml'
vmm_xml_path = '/tmp/' + vmm_xml_name
print vmm_xml_path
if os.path.exists(vmm_xml_path):
pass
else :
os.mknod(vmm_xml_path)

xml_open = open(vmm_xml_path,'w')
for lines in vmm_dom_xml:
xml_open.write(lines)
xml_open.close()

vmm_xml_open = ET.parse(vmm_xml_path)
path_list=[]
path = vmm_xml_open.findall('//source')
for i in path:
file1 = i.attrib
filename=file1.get('file')
if filename:
path_list.append(filename)

# print path_list
interface_list = []
interface = vmm_xml_open.findall('//target')
for j in interface:
interface_network = j.attrib
dev1 = interface_network.get('dev')
dev3 = 'vnet'
dev2 = str(dev1)
if dev3 in dev2:
interface_list.append(dev1)

# print interface_list

totalrd = vmmid + 'rd'
totalrd_byte = 0
totalwr = vmmid + 'wr'
totalwr_byte = 0
totalrx = vmmid + 'rx'
totalrx_byte = 0
totaltx = vmmid + 'tx'
totaltx_byte = 0
totalrp = vmmid + 'rp'
totalrx_packet = 0
totaltp = vmmid + 'tp'
totaltx_packet = 0

for image_file in path_list:
# print image_file
# size = vmm_id.blockInfo(image_file,0)
block_status = vmm_id.blockStatsFlags(image_file,0)

totalrd_bytetotalrd_byte = totalrd_byte + block_status['rd_bytes']
totalwr_bytetotalwr_byte = totalwr_byte + block_status['wr_bytes']
print totalrd_byte
print totalwr_byte
# print totalwr_byte

for interfaceinfo_path in interface_list:
interfaceinfo = vmm_id.interfaceStats(interfaceinfo_path)
totalrx_bytetotalrx_byte = totalrx_byte + interfaceinfo[0]
totalrx_packettotalrx_packet = totalrx_packet + interfaceinfo[1]
totaltx_bytetotaltx_byte = totaltx_byte + interfaceinfo[4]
totaltx_packettotaltx_packet = totaltx_packet + interfaceinfo[5]

totalmem = vmmid + 'actual'
totalmem_data = 0
rssmem = vmmid + 'rss'
rssmem_data = 0
mem_status = vmm_id.memoryStats()
totalmem_data = mem_status['actual']
rssmem_data = mem_status['rss']
# print totalmem_data
# print rssmem_data

totalcpu = vmmid + 'cpu'
totalcpu_usage = 0
cpu_time = vmm_id.info()[4]
timetime1 = time.time()
time.sleep(3)
timetime2 = time.time()
cpu_new_time = vmm_id.info()[4]
totalcpu_usage = int(((cpu_new_time - cpu_time)/((time2 - time1)*10000000))*100)
print totalcpu_usage

mc.set('centosliran', '1234', 20)
mc.set('centos_clusterliran','345',20)
mc.set_multi({totalrd:totalrd_byte,totalwr:totalwr_byte,totalrx:totalrx_byte,totaltx:totaltx_byte,totalrp:totalrx_packet,totaltp:totaltx_packet,totalmem:totalmem_data,rssmem:rssmem_data,totalcpu:totalcpu_usage},60)
#value = mc.get('key')
# print value
except:
pass

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