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# Licensed to the Apache Software Foundation (ASF) under one

# or more contributor license agreements. See the NOTICE file

# distributed with this work for additional information

# regarding copyright ownership. The ASF licenses this file

# to you under the Apache License, Version 2.0 (the

# "License"); you may not use this file except in compliance

# with the License. You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing,

# software distributed under the License is distributed on an

# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

# KIND, either express or implied. See the License for the

# specific language governing permissions and limitations

# under the License.

from cloudException import CloudRuntimeException, formatExceptionInfo

import logging

from subprocess import PIPE, Popen

from signal import alarm, signal, SIGALRM, SIGKILL

import sys

import os

class bash:

def __init__(self, args, timeout=600):

self.args = args

logging.debug("execute:%s"%args)

self.timeout = timeout

self.process = None

self.success = False

self.run()

def run(self):

class Alarm(Exception):

pass

def alarm_handler(signum, frame):

raise Alarm

try:

self.process = Popen(self.args, shell=True, stdout=PIPE, stderr=PIPE)

if self.timeout != -1:

signal(SIGALRM, alarm_handler)

alarm(self.timeout)

try:

self.stdout, self.stderr = self.process.communicate()

if self.timeout != -1:

alarm(0)

except Alarm:

os.kill(self.process.pid, SIGKILL)

raise CloudRuntimeException("Timeout during command execution")

self.success = self.process.returncode == 0

except:

raise CloudRuntimeException(formatExceptionInfo())

if not self.success:

logging.debug("Failed to execute:" + self.getErrMsg())

def isSuccess(self):

return self.success

def getStdout(self):

return self.stdout.strip("\n")

def getLines(self):

return self.stdout.split("\n")

def getStderr(self):

return self.stderr.strip("\n")

def getErrMsg(self):

if self.isSuccess():

return ""

if self.getStderr() is None or self.getStderr() == "":

return self.getStdout()

else:

return self.getStderr()

def initLoging(logFile=None):

try:

if logFile is None:

logging.basicConfig(level=logging.DEBUG)

else:

logging.basicConfig(filename=logFile, level=logging.DEBUG)

except:

logging.basicConfig(level=logging.DEBUG)

def writeProgressBar(msg, result):

output = "[%-6s]\n"%"Failed"

if msg is not None:

output = "%-30s"%msg

elif result is True:

output = "[%-2s]\n"%"OK"

elif result is False:

output = "[%-6s]\n"%"Failed"

sys.stdout.write(output)

sys.stdout.flush()

class UnknownSystemException(Exception):

"This Excption is raised if the current operating enviornment is unknown"

pass

class Distribution:

def __init__(self):

self.distro = "Unknown"

self.release = "Unknown"

if os.path.exists("/etc/fedora-release"):

self.distro = "Fedora"

elif os.path.exists("/etc/redhat-release"):

version = file("/etc/redhat-release").readline()

if version.find("Red Hat Enterprise Linux Server release 6") != -1 or version.find("Scientific Linux release 6") != -1 or version.find("CentOS Linux release 6") != -1 or version.find("CentOS release 6.") != -1:

self.distro = "RHEL6"

elif version.find("Red Hat Enterprise Linux Server release 7") != -1:

self.distro = "RHEL7"

elif version.find("CentOS release") != -1:

self.distro = "CentOS"

else:

self.distro = "RHEL5"

elif os.path.exists("/etc/legal") and "Ubuntu" in file("/etc/legal").read(-1):

self.distro = "Ubuntu"

kernel = bash("uname -r").getStdout()

if kernel.find("2.6.32") != -1:

self.release = "10.04"

self.arch = bash("uname -m").getStdout()

elif os.path.exists("/usr/bin/lsb_release"):

o = bash("/usr/bin/lsb_release -i")

distributor = o.getStdout().split(":\t")[1]

if "Debian" in distributor:

# This obviously needs a rewrite at some point

self.distro = "Ubuntu"

else:

raise UnknownSystemException(distributor)

else:

raise UnknownSystemException

def getVersion(self):

return self.distro

def getRelease(self):

return self.release

def getArch(self):

return self.arch

class serviceOps:

pass

class serviceOpsRedhat(serviceOps):

def isServiceRunning(self, servicename):

try:

o = bash("service " + servicename + " status")

if "running" in o.getStdout() or "start" in o.getStdout() or "Running" in o.getStdout():

return True

else:

return False

except:

return False

def stopService(self, servicename,force=False):

if self.isServiceRunning(servicename) or force:

return bash("service " + servicename +" stop").isSuccess()

return True

def disableService(self, servicename):

result = self.stopService(servicename)

bash("chkconfig --del " + servicename)

return result

def startService(self, servicename,force=False):

if not self.isServiceRunning(servicename) or force:

return bash("service " + servicename + " start").isSuccess()

return True

def enableService(self, servicename,forcestart=False):

bash("chkconfig --level 2345 " + servicename + " on")

return self.startService(servicename,force=forcestart)

def isKVMEnabled(self):

if os.path.exists("/dev/kvm"):

return True

else:

return False

class serviceOpsUbuntu(serviceOps):

def isServiceRunning(self, servicename):

try:

o = bash("sudo /usr/sbin/service " + servicename + " status")

if "not running" in o.getStdout():

return False

else:

return True

except:

return False

def stopService(self, servicename,force=True):

if self.isServiceRunning(servicename) or force:

return bash("sudo /usr/sbin/service " + servicename +" stop").isSuccess()

def disableService(self, servicename):

result = self.stopService(servicename)

bash("sudo update-rc.d -f " + servicename + " remove")

return result

def startService(self, servicename,force=True):

if not self.isServiceRunning(servicename) or force:

return bash("sudo /usr/sbin/service " + servicename + " start").isSuccess()

def enableService(self, servicename,forcestart=True):

bash("sudo update-rc.d -f " + servicename + " remove")

bash("sudo update-rc.d -f " + servicename + " defaults")

return self.startService(servicename,force=forcestart)

def isKVMEnabled(self):

return bash("kvm-ok").isSuccess()

class serviceOpsRedhat7(serviceOps):

def isServiceRunning(self, servicename):

try:

o = bash("systemctl status " + servicename)

if "running" in o.getStdout() or "start" in o.getStdout() or "Running" in o.getStdout():

return True

else:

return False

except:

return False

def stopService(self, servicename,force=False):

if self.isServiceRunning(servicename) or force:

return bash("systemctl stop " + servicename).isSuccess()

return True

def disableService(self, servicename):

result = self.stopService(servicename)

bash("systemctl disable " + servicename)

return result

def startService(self, servicename,force=False):

if not self.isServiceRunning(servicename) or force:

return bash("systemctl start " + servicename).isSuccess()

return True

def enableService(self, servicename,forcestart=False):

bash("systemctl enable " + servicename)

return self.startService(servicename,force=forcestart)

def isKVMEnabled(self):

if os.path.exists("/dev/kvm"):

return True

else:

return False