135 lines
3.2 KiB
Python
135 lines
3.2 KiB
Python
#!/usr/bin/env python3
|
|
"""
|
|
=encoding utf8
|
|
|
|
=head1 NAME
|
|
|
|
kvm_cpu - show CPU usage of VM
|
|
|
|
|
|
=head1 CONFIGURATION
|
|
|
|
Parsed environment variables:
|
|
|
|
vmsuffix: part of VM name to be removed
|
|
|
|
|
|
=head1 LICENSE
|
|
|
|
GPLv3
|
|
|
|
SPDX-License-Identifier: GPL-3.0-only
|
|
|
|
|
|
=head1 AUTHORS
|
|
|
|
Maxence Dunnewind
|
|
|
|
Rodolphe Quiédeville
|
|
|
|
|
|
=head1 MAGIC MARKERS
|
|
|
|
#%# capabilities=autoconf
|
|
#%# family=contrib
|
|
|
|
=cut
|
|
"""
|
|
|
|
import os
|
|
import re
|
|
import sys
|
|
from subprocess import Popen, PIPE
|
|
|
|
|
|
def config(vm_names):
|
|
''' Print the plugin's config
|
|
@param vm_names : a list of "cleaned" vms' name
|
|
'''
|
|
percent = 100 * len(
|
|
filter(lambda x: x[0:3] == 'cpu' and x[3] != ' ', open('/proc/stat', 'r').readlines()))
|
|
|
|
base_config = """graph_title KVM Virtual Machine CPU usage
|
|
graph_vlabel %%
|
|
graph_category virtualization
|
|
graph_scale no
|
|
graph_period second
|
|
graph_info This graph shows the current CPU used by virtual machines
|
|
graph_args --base 1000 -r --lower-limit 0 --upper-limit %d""" % percent
|
|
print(base_config)
|
|
for vm in vm_names:
|
|
print("%s_cpu.label %s" % (vm, vm))
|
|
print("%s_cpu.min 0" % vm)
|
|
print("%s_cpu.type DERIVE" % vm)
|
|
print("%s_cpu.draw AREASTACK" % vm)
|
|
print("%s_cpu.info percent of cpu time used by virtual machine" % vm)
|
|
|
|
|
|
def clean_vm_name(vm_name):
|
|
''' Replace all special chars
|
|
@param vm_name : a vm's name
|
|
@return cleaned vm's name
|
|
'''
|
|
# suffix part defined in conf
|
|
suffix = os.getenv('vmsuffix')
|
|
if suffix:
|
|
vm_name = re.sub(suffix, '', vm_name)
|
|
# proxmox uses kvm with -name parameter
|
|
parts = vm_name.split('\x00')
|
|
if parts[0].endswith('kvm'):
|
|
try:
|
|
return parts[parts.index('-name') + 1]
|
|
except ValueError:
|
|
pass
|
|
return re.sub(r"[^a-zA-Z0-9_]", "_", vm_name)
|
|
|
|
|
|
def detect_kvm():
|
|
''' Check if kvm is installed '''
|
|
kvm = Popen("which kvm", shell=True, stdout=PIPE)
|
|
kvm.communicate()
|
|
return not bool(kvm.returncode)
|
|
|
|
|
|
def find_vm_names(pids):
|
|
'''Find and clean vm names from pids
|
|
@return a dictionary of {pids : cleaned vm name}
|
|
'''
|
|
result = {}
|
|
for pid in pids:
|
|
cmdline = open("/proc/%s/cmdline" % pid, "r")
|
|
result[pid] = clean_vm_name(
|
|
re.sub(r"^.*guest=([a-zA-Z0-9.-_-]*).*$", r"\1", cmdline.readline()))
|
|
return result
|
|
|
|
|
|
def list_pids():
|
|
''' Find the pid of kvm processes
|
|
@return a list of pids from running kvm
|
|
'''
|
|
pid = Popen("pidof qemu-kvm qemu-system-x86_64 kvm", shell=True, stdout=PIPE)
|
|
return pid.communicate()[0].split()
|
|
|
|
|
|
def fetch(vms):
|
|
''' Fetch values for a list of pids
|
|
@param dictionary {kvm_pid: cleaned vm name}
|
|
'''
|
|
for pid, name in vms.items():
|
|
user, system = open("/proc/%s/stat" % pid, 'r').readline().split(' ')[13:15]
|
|
print('%s_cpu.value %d' % (name, int(user) + int(system)))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
if len(sys.argv) > 1:
|
|
if sys.argv[1] in ['autoconf', 'detect']:
|
|
if detect_kvm():
|
|
print("yes")
|
|
else:
|
|
print("no")
|
|
elif sys.argv[1] == "config":
|
|
config(find_vm_names(list_pids()).values())
|
|
else:
|
|
fetch(find_vm_names(list_pids()))
|
|
else:
|
|
fetch(find_vm_names(list_pids()))
|