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#!/usr/bin/env python
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# Copyright (C) 2012 Robert Yang
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import os, logging, re, sys
import bb
logger = logging.getLogger("BitBake.Monitor")
def printErr(info):
logger.error("%s\n Disk space monitor will NOT be enabled" % info)
def convertGMK(unit):
""" Convert the space unit G, M, K, the unit is case-insensitive """
unitG = re.match('([1-9][0-9]*)[gG]\s?$', unit)
if unitG:
return int(unitG.group(1)) * (1024 ** 3)
unitM = re.match('([1-9][0-9]*)[mM]\s?$', unit)
if unitM:
return int(unitM.group(1)) * (1024 ** 2)
unitK = re.match('([1-9][0-9]*)[kK]\s?$', unit)
if unitK:
return int(unitK.group(1)) * 1024
unitN = re.match('([1-9][0-9]*)\s?$', unit)
if unitN:
return int(unitN.group(1))
else:
return None
def getMountedDev(path):
""" Get the device mounted at the path, uses /proc/mounts """
# Get the mount point of the filesystem containing path
# st_dev is the ID of device containing file
parentDev = os.stat(path).st_dev
currentDev = parentDev
# When the current directory's device is different from the
# parrent's, then the current directory is a mount point
while parentDev == currentDev:
mountPoint = path
# Use dirname to get the parrent's directory
path = os.path.dirname(path)
# Reach the "/"
if path == mountPoint:
break
parentDev= os.stat(path).st_dev
try:
with open("/proc/mounts", "r") as ifp:
for line in ifp:
procLines = line.rstrip('\n').split()
if procLines[1] == mountPoint:
return procLines[0]
except EnvironmentError:
pass
return None
def getDiskData(BBDirs, configuration):
"""Prepare disk data for disk space monitor"""
# Save the device IDs, need the ID to be unique (the dictionary's key is
# unique), so that when more than one directories are located in the same
# device, we just monitor it once
devDict = {}
for pathSpaceInode in BBDirs.split():
# The input format is: "dir,space,inode", dir is a must, space
# and inode are optional
pathSpaceInodeRe = re.match('([^,]*),([^,]*),([^,]*),?(.*)', pathSpaceInode)
if not pathSpaceInodeRe:
printErr("Invalid value in BB_DISKMON_DIRS: %s" % pathSpaceInode)
return None
action = pathSpaceInodeRe.group(1)
if action not in ("ABORT", "STOPTASKS", "WARN"):
printErr("Unknown disk space monitor action: %s" % action)
return None
path = os.path.realpath(pathSpaceInodeRe.group(2))
if not path:
printErr("Invalid path value in BB_DISKMON_DIRS: %s" % pathSpaceInode)
return None
# The disk space or inode is optional, but it should have a correct
# value once it is specified
minSpace = pathSpaceInodeRe.group(3)
if minSpace:
minSpace = convertGMK(minSpace)
if not minSpace:
printErr("Invalid disk space value in BB_DISKMON_DIRS: %s" % pathSpaceInodeRe.group(3))
return None
else:
# 0 means that it is not specified
minSpace = None
minInode = pathSpaceInodeRe.group(4)
if minInode:
minInode = convertGMK(minInode)
if not minInode:
printErr("Invalid inode value in BB_DISKMON_DIRS: %s" % pathSpaceInodeRe.group(4))
return None
else:
# 0 means that it is not specified
minInode = None
if minSpace is None and minInode is None:
printErr("No disk space or inode value in found BB_DISKMON_DIRS: %s" % pathSpaceInode)
return None
# mkdir for the directory since it may not exist, for example the
# DL_DIR may not exist at the very beginning
if not os.path.exists(path):
bb.utils.mkdirhier(path)
mountedDev = getMountedDev(path)
devDict[mountedDev] = action, path, minSpace, minInode
return devDict
def getInterval(configuration):
""" Get the disk space interval """
interval = configuration.getVar("BB_DISKMON_WARNINTERVAL", True)
if not interval:
# The default value is 50M and 5K.
return 50 * 1024 * 1024, 5 * 1024
else:
# The disk space or inode interval is optional, but it should
# have a correct value once it is specified
intervalRe = re.match('([^,]*),?\s*(.*)', interval)
if intervalRe:
intervalSpace = intervalRe.group(1)
if intervalSpace:
intervalSpace = convertGMK(intervalSpace)
if not intervalSpace:
printErr("Invalid disk space interval value in BB_DISKMON_WARNINTERVAL: %s" % intervalRe.group(1))
return None, None
intervalInode = intervalRe.group(2)
if intervalInode:
intervalInode = convertGMK(intervalInode)
if not intervalInode:
printErr("Invalid disk inode interval value in BB_DISKMON_WARNINTERVAL: %s" % intervalRe.group(2))
return None, None
return intervalSpace, intervalInode
else:
printErr("Invalid interval value in BB_DISKMON_WARNINTERVAL: %s" % interval)
return None, None
class diskMonitor:
"""Prepare the disk space monitor data"""
def __init__(self, configuration):
self.enableMonitor = False
BBDirs = configuration.getVar("BB_DISKMON_DIRS", True) or None
if BBDirs:
self.devDict = getDiskData(BBDirs, configuration)
if self.devDict:
self.spaceInterval, self.inodeInterval = getInterval(configuration)
if self.spaceInterval and self.inodeInterval:
self.enableMonitor = True
# These are for saving the previous disk free space and inode, we
# use them to avoid print too many warning messages
self.preFreeS = {}
self.preFreeI = {}
# This is for STOPTASKS and ABORT, to avoid print the message repeatly
# during waiting the tasks to finish
self.checked = {}
for dev in self.devDict:
self.preFreeS[dev] = 0
self.preFreeI[dev] = 0
self.checked[dev] = False
if self.spaceInterval is None and self.inodeInterval is None:
self.enableMonitor = False
def check(self, rq):
""" Take action for the monitor """
if self.enableMonitor:
for dev in self.devDict:
st = os.statvfs(self.devDict[dev][1])
# The free space, float point number
freeSpace = st.f_bavail * st.f_frsize
if self.devDict[dev][2] and freeSpace < self.devDict[dev][2]:
# Always show warning, the self.checked would always be False if the action is WARN
if self.preFreeS[dev] == 0 or self.preFreeS[dev] - freeSpace > self.spaceInterval and not self.checked[dev]:
logger.warn("The free space of %s is running low (%.3fGB left)" % (dev, freeSpace / 1024 / 1024 / 1024.0))
self.preFreeS[dev] = freeSpace
if self.devDict[dev][0] == "STOPTASKS" and not self.checked[dev]:
logger.error("No new tasks can be excuted since the disk space monitor action is \"STOPTASKS\"!")
self.checked[dev] = True
rq.finish_runqueue(False)
elif self.devDict[dev][0] == "ABORT" and not self.checked[dev]:
logger.error("Immediately abort since the disk space monitor action is \"ABORT\"!")
self.checked[dev] = True
rq.finish_runqueue(True)
# The free inodes, float point number
freeInode = st.f_favail
if self.devDict[dev][3] and freeInode < self.devDict[dev][3]:
# Always show warning, the self.checked would always be False if the action is WARN
if self.preFreeI[dev] == 0 or self.preFreeI[dev] - freeInode > self.inodeInterval and not self.checked[dev]:
logger.warn("The free inode of %s is running low (%.3fK left)" % (dev, freeInode / 1024.0))
self.preFreeI[dev] = freeInode
if self.devDict[dev][0] == "STOPTASKS" and not self.checked[dev]:
logger.error("No new tasks can be excuted since the disk space monitor action is \"STOPTASKS\"!")
self.checked[dev] = True
rq.finish_runqueue(False)
elif self.devDict[dev][0] == "ABORT" and not self.checked[dev]:
logger.error("Immediately abort since the disk space monitor action is \"ABORT\"!")
self.checked[dev] = True
rq.finish_runqueue(True)
return
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