Shulou(Shulou.com)05/31 Report--

Editor to share with you the KVM virtual machine monitoring example analysis, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it!

1 Monitoring of CPU

Python code

Import libvirt

Import os

Import time

Conn=libvirt.open ("qemu:///system")

If conn==None:

Print "fail to connect hypervisor"

Sys.exit (1)

Try:

Dom0=conn.lookupByID (85) # get the corresponding Domain object according to the Instance ID created by OpenStack

Except:

Print "fail to find the domain by ID"

Sys.exit (1)

Pstart_time=time.time () # take the current time

Dstart_time=dom0.info () [4] # directly get the CPU time information in DomainInfo

Time.sleep (2)

Dstop_time=dom0.info () [4]

Pstop_time=time.time ()

Core_num=int (dom0.info () [3]) # get the quantity information of core in DomainIndo

# CPU utilization calculation formula-CPU time difference / interval / 100000000000 / number of cores * 100=CPU utilization

Cpu_usage= (Dstart_time-Dstop_time) / (Pstart_time-Pstop_time) / 1000000000/core_num*100

Cpu_usage=cpu_usage if (cpu_usage > 0) else 0.0

Cpu_usage=cpu_usage if (cpu_usage

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