"""Used internally by RRDUpdates"""

def __init__(self, uuid):

self.uuid = uuid

"""Used internally by RRDUpdates"""

def __init__(self, uuid):

self.uuid = uuid

""" Object used to get and parse the output the http://localhost/rrd_udpates?...

def __init__(self):

# params are what get passed to the CGI executable in the URL

self.params = dict()

self.params['start'] = int(time.time()) - 1000 # For demo purposes!

self.params['host'] = 'false' # include data for host (as well as for VMs)

self.params['cf'] = 'AVERAGE' # consolidation function, each sample averages 12 from the 5 second RRD

self.params['interval'] = '60'

def get_nrows(self):

return self.rows

def get_vm_list(self):

return self.vm_reports.keys()

def get_vm_param_list(self, uuid):

report = self.vm_reports[uuid]

if not report:

return []

return report.keys()

def get_total_cpu_core(self, uuid):

report = self.vm_reports[uuid]

if not report:

return 0

else:

param_keys = report.keys()

result = 0

for param in param_keys:

if "cpu" in param:

result += 1

return result

def get_vm_data(self, uuid, param, row):

#pp = pprint.PrettyPrinter(indent=4)

#pp.pprint(self.vm_reports)

report = self.vm_reports[uuid]

col = report[param]

return self.__lookup_data(col, row)

def get_host_uuid(self):

report = self.host_report

if not report:

return None

return report.uuid

def get_host_param_list(self):

report = self.host_report

if not report:

return []

return report.keys()

def get_host_data(self, param, row):

report = self.host_report

col = report[param]

return self.__lookup_data(col, row)

def get_row_time(self, row):

return self.__lookup_timestamp(row)

# extract float from value (<v>) node by col,row

def __lookup_data(self, col, row):

# Note: the <rows> nodes are in reverse chronological order, and comprise

# a timestamp <t> node, followed by self.columns data <v> nodes

node = self.data_node.childNodes[self.rows - 1 - row].childNodes[col + 1]

return float(node.firstChild.toxml()) # node.firstChild should have nodeType TEXT_NODE

# extract int from value (<t>) node by row

def __lookup_timestamp(self, row):

# Note: the <rows> nodes are in reverse chronological order, and comprise

# a timestamp <t> node, followed by self.columns data <v> nodes

node = self.data_node.childNodes[self.rows - 1 - row].childNodes[0]

return int(node.firstChild.toxml()) # node.firstChild should have nodeType TEXT_NODE

def refresh(self, login, starttime, session, override_params):

self.params['start'] = starttime

params = override_params

params['session_id'] = session

params.update(self.params)

paramstr = "&".join(["%s=%s" % (k, params[k]) for k in params])

# this is better than urllib.urlopen() as it raises an Exception on http 401 'Unauthorised' error

# rather than drop into interactive mode

for host in login.host.get_all():

#print "http://" + str(login.host.get_address(host)) + "/rrd_updates?%s" % paramstr

sock = urllib.URLopener().open("http://" + str(login.host.get_address(host)) + "/rrd_updates?%s" % paramstr)

xmlsource = sock.read()

sock.close()

xmldoc = minidom.parseString(xmlsource)

self.__parse_xmldoc(xmldoc)

# Update the time used on the next run

self.params['start'] = self.end_time + 1 # avoid retrieving same data twice

def __parse_xmldoc(self, xmldoc):

# The 1st node contains meta data (description of the data)

# The 2nd node contains the data

self.meta_node = xmldoc.firstChild.childNodes[0]

self.data_node = xmldoc.firstChild.childNodes[1]

def lookup_metadata_bytag(name):

return int(self.meta_node.getElementsByTagName(name)[0].firstChild.toxml())

# rows = number of samples per variable

# columns = number of variables

self.rows = lookup_metadata_bytag('rows')

self.columns = lookup_metadata_bytag('columns')

# These indicate the period covered by the data

self.start_time = lookup_metadata_bytag('start')

self.step_time = lookup_metadata_bytag('step')

self.end_time = lookup_metadata_bytag('end')

# the <legend> Node describes the variables

self.legend = self.meta_node.getElementsByTagName('legend')[0]

# vm_reports matches uuid to per VM report

if not hasattr(self,'vm_reports'):

self.vm_reports = {}

# There is just one host_report and its uuid should not change!

self.host_report = None

# Handle each column. (I.e. each variable)

for col in range(self.columns):

self.__handle_col(col)

def __handle_col(self, col):

# work out how to interpret col from the legend

col_meta_data = self.legend.childNodes[col].firstChild.toxml()

# vm_or_host will be 'vm' or 'host'. Note that the Control domain counts as a VM!

(cf, vm_or_host, uuid, param) = col_meta_data.split(':')

if vm_or_host == 'vm':

# Create a report for this VM if it doesn't exist

if not uuid in self.vm_reports:

self.vm_reports[uuid] = VMReport(uuid)

# Update the VMReport with the col data and meta data

vm_report = self.vm_reports[uuid]

vm_report[param] = col

elif vm_or_host == 'host':

# Create a report for the host if it doesn't exist

if not self.host_report:

self.host_report = HostReport(uuid)

elif self.host_report.uuid != uuid:

raise PerfMonException("Host UUID changed: (was %s, is %s)" % (self.host_report.uuid, uuid))

# Update the HostReport with the col data and meta data

self.host_report[param] = col

else:

status, output = commands.getstatusoutput("xe vm-list | grep "+vm_name+" -B 1 | head -n 1 | awk -F':' '{print $2}' | tr -d ' '")

if (status != 0):

raise PerfMonException("Invalid vm name: %s" % vm_name)

login = XenAPI.xapi_local()

login.login_with_password("","")

result = ""

total_vm = int(args['total_vm'])

total_counter = int(args['total_counter'])

now = int(time.time()) / 60

# Get pool's info of this host

#pool = login.xenapi.pool.get_all()[0]

# Get master node's address of pool

#master = login.xenapi.pool.get_master(pool)

#master_address = login.xenapi.host.get_address(master)

session = login._session

max_duration = 0

for counter_count in xrange(1, total_counter + 1):

duration = int(args['duration' + str(counter_count)])

if duration > max_duration:

max_duration = duration

rrd_updates = RRDUpdates()

rrd_updates.refresh(login.xenapi, now * 60 - max_duration, session, {})

#for uuid in rrd_updates.get_vm_list():

for vm_count in xrange(1, total_vm + 1):

vm_name = args['vmname' + str(vm_count)]

vm_uuid = getuuid(vm_name)

#print "Got values for VM: " + str(vm_count) + " " + vm_uuid

for counter_count in xrange(1, total_counter + 1):

#refresh average

average_cpu = 0

average_memory = 0

counter = args['counter' + str(counter_count)]

total_row = rrd_updates.get_nrows()

duration = int(args['duration' + str(counter_count)]) / 60

duration_diff = total_row - duration

if counter == "cpu":

total_cpu = rrd_updates.get_total_cpu_core(vm_uuid)

for row in xrange(duration_diff, total_row):

for cpu in xrange(0, total_cpu):

average_cpu += rrd_updates.get_vm_data(vm_uuid, "cpu" + str(cpu), row)

average_cpu /= (duration * total_cpu)

if result == "":

result += str(vm_count) + '.' + str(counter_count) + ':' + str(average_cpu)

else:

result += ',' + str(vm_count) + '.' + str(counter_count) + ':' + str(average_cpu)

elif counter == "memory":

for row in xrange(duration_diff, total_row):

average_memory += rrd_updates.get_vm_data(vm_uuid, "memory_target", row) / 1048576 - rrd_updates.get_vm_data(vm_uuid, "memory_internal_free", row) / 1024

average_memory /= duration

if result == "":

result += str(vm_count) + '.' + str(counter_count) + ':' + str(average_memory)

else:

result += ',' + str(vm_count) + '.' + str(counter_count) + ':' + str(average_memory)