vSphere 虚拟机网卡性能采集

from pyVmomi import vim
from tools import cli
from pyVim.connect import SmartConnectNoSSL, Disconnect
import atexit
import getpass
import datetime


def main():

    args = cli.get_args()

    # Connect to the host without SSL signing
    try:
        si = SmartConnectNoSSL(
            host=args.host,
            user=args.user,
            pwd=args.password,
            port=int(args.port))
        atexit.register(Disconnect, si)

    except IOError as e:
        pass

    if not si:
        raise SystemExit("Unable to connect to host with supplied info.")

    content = si.RetrieveContent()
    perfManager = content.perfManager

    # create a mapping from performance stats to their counterIDs
    # counterInfo: [performance stat => counterId]
    # performance stat example: cpu.usagemhz.LATEST
    # counterId example: 6
    counterInfo = {}
    for c in perfManager.perfCounter:
        prefix = c.groupInfo.key
        fullName = c.groupInfo.key + "." + c.nameInfo.key + "." + c.rollupType
        counterInfo[fullName] = c.key
        #print'fullName {}= {}'.format(fullName,c.key)
  
    # create a list of vim.VirtualMachine objects so
    # that we can query them for statistics
    container = content.rootFolder
    viewType = [vim.VirtualMachine]
    recursive = True

    containerView = content.viewManager.CreateContainerView(container,
                                                            viewType,
                                                            recursive)
    children = containerView.view

    #startTime = datetime.datetime.now() - datetime.timedelta(hours=24)
    #endTime = datetime.datetime.now()
    # Loop through all the VMs
    for child in children:
        # Get all available metric IDs for this VM
        #counterIDs = [m.counterId for m in
        #              perfManager.QueryAvailablePerfMetric(child,None,None,20)]			  
        #print("child counterIDS",counterIDs)
        counterIDs = [146,147,470,471]		

        # Using the IDs form a list of MetricId
        # objects for building the Query Spec
        metricIDs = [vim.PerformanceManager.MetricId(counterId=c,
                                                     instance="")
                     for c in counterIDs]
        #print("metricIDs ",metricIDs)

        # Build the specification to be used
        # for querying the performance manager
        spec = vim.PerformanceManager.QuerySpec(maxSample=2,
                                                entity=child,
                                                metricId=metricIDs,
						intervalId=20)
        # Query the performance manager
        # based on the metrics created above
        result = perfManager.QueryStats(querySpec=[spec])

        # Loop through the results and print the output
        output = ""
        for r in result:
            print("the r is ",r)
            output += "name:        " + child.summary.config.name + "\n"
            for val in result[0].value:
                output += counterInfo.keys()[
                          counterInfo.values().index(val.id.counterId)]
                output += ": " + str(val.value[0]) + "\n"
            output += "\n"

        print(output)

if __name__ == "__main__":
    main()

说明： 1）因为我们要取的数据是明确的，就是要取

                net.packetsRx.summation= 146

                net.packetsTx.summation= 147

                net.bytesRx.average= 470
                net.bytesTx.average= 471

              所以没有使用 perfManager.QueryAvailablePerfMetric(child,None,None,20) 查询虚拟机可以使用的countId

          2)  vim.PerformanceManager.MetricId(counterId=c,instance="")

                instance 参数可以指定为 "*" 或者是空串 "", 

                空串返回结果时不会将主机的相关数据一起传回来，“*” 返回的结果是带有主机的相关数据的.

               比如，对上面的countId, "*" 会返回，vmnic0,vmnic1,vmnic2,vmnic3,vmnic4,vmnic5，4000的数据

          3) 构造PerfQuerySpec 对象时，需要加上 intervalId 参数，如果不加上这个参数，则会取不到实时数据，只能取到 net.usage.average= 143 数据（对网络来说)

              调用perfManager.QueryAvailablePerfMetric(child)  方法反回的数组中没有 146,147,470,471,只有143