mirror of
https://github.com/munin-monitoring/contrib.git
synced 2018-11-08 00:59:34 +01:00
142 lines
3.9 KiB
Python
Executable File
142 lines
3.9 KiB
Python
Executable File
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# vim: set fileencoding=utf-8
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#
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# Munin plugin to show the network I/O per vm
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#
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# Copyright Igor Borodikhin
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#
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# License : GPLv3
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#
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#
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# parsed environment variables:
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# vmsuffix: part of vm name to be removed
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#
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#%# capabilities=autoconf
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#%# family=contrib
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import re, os, sys
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from subprocess import Popen, PIPE
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def config(vm_names):
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''' Print the plugin's config
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@param vm_names : a list of "cleaned" vms' name
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'''
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base_config = """graph_title KVM Network I/O
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graph_vlabel Bytes rx(-)/tx(+) per second
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graph_category Virtualization
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graph_info This graph shows the network I/O of the virtual machines
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graph_args --base 1024
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"""
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print base_config
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for vm in vm_names:
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print "%s_in.label %s" % (vm, vm)
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print "%s_in.type COUNTER" % vm
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print "%s_in.min 0" % vm
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print "%s_in.draw LINE2" % vm
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print "%s_out.negative %s_in" % (vm, vm)
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print "%s_out.label %s" % (vm, vm)
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print "%s_out.type COUNTER" % vm
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print "%s_out.min 0" % vm
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print "%s_out.draw LINE2" % vm
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def clean_vm_name(vm_name):
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''' Replace all special chars
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@param vm_name : a vm's name
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@return cleaned vm's name
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'''
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# suffix part defined in conf
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suffix = os.getenv('vmsuffix')
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if suffix:
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vm_name = re.sub(suffix,'',vm_name)
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return re.sub(r"[^a-zA-Z0-9_]", "_", vm_name)
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def fetch(vms):
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''' Fetch values for a list of pids
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@param dictionnary {kvm_pid: cleaned vm name}
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'''
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res = {}
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for pid in vms:
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tap = get_vm_mac(pid)
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try:
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f = open("/proc/net/dev", "r")
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for line in f.readlines():
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if tap in line:
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print "%s_in.value %s" % (vms[pid], re.sub(r"%s:"%tap, "", line.split()[0]))
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print "%s_out.value %s" % (vms[pid], line.split()[8])
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break
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except Exception as inst:
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print inst
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continue
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def detect_kvm():
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''' Check if kvm is installed
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'''
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kvm = Popen("which kvm", shell=True, stdout=PIPE)
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kvm.communicate()
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return not bool(kvm.returncode)
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def find_vm_names(pids):
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'''Find and clean vm names from pids
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@return a dictionnary of {pids : cleaned vm name}
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'''
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result = {}
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for pid in pids:
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cmdline = open("/proc/%s/cmdline" % pid, "r")
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result[pid] = clean_vm_name(re.sub(r"^.*-name\x00([a-zA-Z0-9.-_-]*)\x00\-.*$",r"\1", cmdline.readline()))
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return result
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def get_vm_mac(pid):
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'''Find and clean vm names from pids
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@return the mac address for a specified pid
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'''
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cmdline = open("/proc/%s/cmdline" % pid, "r")
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line = cmdline.readline()
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mac = re.sub(r"^.*ifname=(tap[^,]+),.*$",r"\1", line)
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return mac
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def list_pids():
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''' Find the pid of kvm processes
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@return a list of pids from running kvm
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'''
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pid = Popen("pidof qemu-system-x86_64", shell=True, stdout=PIPE)
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return pid.communicate()[0].split()
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def find_vms_tap():
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''' Check if kvm is installed
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@return a list of pids from running kvm
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'''
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result = []
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tap = ""
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mac = ""
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kvm = Popen("ip a | grep -A 1 tap | awk '{print $2}' | grep -v '^$'", shell=True, stdout=PIPE)
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res = kvm.communicate()[0].split('\n')
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for line in res:
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try:
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if len(line) > 0:
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if re.match(r"^tap.*", line):
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tap = re.sub(r"(tap[^:]+):", r"\1", line)
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else:
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result.append(tap)
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except Exception as inst:
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continue
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return result
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if __name__ == "__main__":
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if len(sys.argv) > 1:
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if sys.argv[1] in ['autoconf', 'detect']:
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if detect_kvm():
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print "yes"
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else:
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print "no"
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elif sys.argv[1] == "config":
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config(find_vm_names(list_pids()).values())
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else:
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fetch(find_vm_names(list_pids()))
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else:
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fetch(find_vm_names(list_pids()))
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