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Merge pull request #83 from iborodikhin/master

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New plugin for KVM network stats.
This commit is contained in:
Kenyon Ralph 2012-04-10 10:49:46 -07:00
commit 3535ad102c
1 changed files with 23 additions and 23 deletions
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36
plugins/kvm/kvm_net
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@ -4,12 +4,10 @@
# #
# Munin plugin to show the network I/O per vm # Munin plugin to show the network I/O per vm
# #
# Copyright Maxence Dunnewind, Rodolphe Quiédeville # Copyright Igor Borodikhin
# #
# License : GPLv3 # License : GPLv3
# #
# need to be run with root privilege to execute brctl
#
# #
# parsed environment variables: # parsed environment variables:
# vmsuffix: part of vm name to be removed # vmsuffix: part of vm name to be removed
@ -58,22 +56,18 @@ def fetch(vms):
''' Fetch values for a list of pids ''' Fetch values for a list of pids
@param dictionnary {kvm_pid: cleaned vm name} @param dictionnary {kvm_pid: cleaned vm name}
''' '''
macs = find_vms_tap()
res = {} res = {}
for pid in vms: for pid in vms:
mac = get_vm_mac(pid) tap = get_vm_mac(pid)
try: try:
tap = "tap%s" % macs[mac]
f = open("/proc/net/dev", "r") f = open("/proc/net/dev", "r")
for line in f.readlines(): for line in f.readlines():
if tap in line: if tap in line:
line = line.split(':')[1] print "%s_in.value %s" % (vms[pid], re.sub(r"%s:"%tap, "", line.split()[0]))
print "%s_in.value %s" % (vms[pid], line.split()[0])
print "%s_out.value %s" % (vms[pid], line.split()[8]) print "%s_out.value %s" % (vms[pid], line.split()[8])
break break
else: except Exception as inst:
f.close() print inst
except:
continue continue
def detect_kvm(): def detect_kvm():
@ -98,7 +92,8 @@ def get_vm_mac(pid):
@return the mac address for a specified pid @return the mac address for a specified pid
''' '''
cmdline = open("/proc/%s/cmdline" % pid, "r") cmdline = open("/proc/%s/cmdline" % pid, "r")
mac = re.sub(r"^.*macaddr=(..:..:..:..:..:..).*$",r"\1", cmdline.readline()) line = cmdline.readline()
mac = re.sub(r"^.*ifname=(tap[^,]+),.*$",r"\1", line)
return mac return mac
def list_pids(): def list_pids():
@ -112,16 +107,21 @@ def find_vms_tap():
''' Check if kvm is installed ''' Check if kvm is installed
@return a list of pids from running kvm @return a list of pids from running kvm
''' '''
result = {} result = []
kvm = Popen("brctl showmacs br0 | grep no", shell=True, stdout=PIPE) tap = ""
mac = ""
kvm = Popen("ip a | grep -A 1 tap | awk '{print $2}' | grep -v '^$'", shell=True, stdout=PIPE)
res = kvm.communicate()[0].split('\n') res = kvm.communicate()[0].split('\n')
for line in res: for line in res:
try: try:
tap = str(int(line.split()[0]) - 1) if len(line) > 0:
mac = line.split()[1] if re.match(r"^tap.*", line):
result[mac] = tap tap = re.sub(r"(tap[^:]+):", r"\1", line)
except: else:
result.append(tap)
except Exception as inst:
continue continue
return result return result
if __name__ == "__main__": if __name__ == "__main__":