ext4_writes_

#!/usr/bin/env python
# -*- python -*-
#
# Wildcard-plugin to monitor ext4 Lifetime writes
#
#%# capabilities=autoconf suggest
#%# family=auto

import os, sys, string, glob
plugin_name=list(os.path.split(sys.argv[0]))[1]
plugin_version="1.0"
device=plugin_name[string.rindex(plugin_name,'_')+1:]

def get_lifetime_writes(device):
   path = "/sys/fs/ext4/" + device + "/lifetime_write_kbytes"
   f = open(path)
   writes = int(f.readline()) * 1024
   f.close()
   return writes

def get_devices():
   devices = glob.glob("/sys/fs/ext4/*/lifetime_write_kbytes")
   return [d[13:string.index(d, '/', 13)] for d in devices]


arg = sys.argv[1] if len(sys.argv) == 2 else None
if arg == "config":
   print('graph_title EXT4 lifetime writes on '+device)
   print('graph_vlabel Lifetime Writes (bytes)')
   print('graph_args --base 1024')
   print('graph_category disk')
   print('writes.label Lifetime writes')
elif arg == "autoconf":
   devices = get_devices()
   if len(devices) == 0:
      print("no (no ext4 filesystems)")
   else:
      print("yes")
elif arg == "suggest":
   for d in get_devices():
      print (d)
elif arg == "version":
   print('ext4_writes_ Munin plugin, version '+plugin_version)
else:
   print('writes.value ' + str(get_lifetime_writes(device)))