#!/usr/bin/env python

# 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.

# -*- coding: utf-8 -*-

"""CloudStack Python utility library"""

import sys, os, subprocess, errno, re, time, glob

import urllib2

import xml.dom.minidom

import logging

import socket

# exit() error constants

E_GENERIC= 1

E_NOKVM = 2

E_NODEFROUTE = 3

E_DHCP = 4

E_NOPERSISTENTNET = 5

E_NETRECONFIGFAILED = 6

E_VIRTRECONFIGFAILED = 7

E_FWRECONFIGFAILED = 8

E_AGENTRECONFIGFAILED = 9

E_AGENTFAILEDTOSTART = 10

E_NOFQDN = 11

E_SELINUXENABLED = 12

try: E_USAGE = os.EX_USAGE

except AttributeError: E_USAGE = 64

E_NEEDSMANUALINTERVENTION = 13

E_INTERRUPTED = 14

E_SETUPFAILED = 15

E_UNHANDLEDEXCEPTION = 16

E_MISSINGDEP = 17

Unknown = 0

Fedora = 1

CentOS = 2

Ubuntu = 3

RHEL6 = 4

IPV4 = 4

IPV6 = 6

#=================== DISTRIBUTION DETECTION =================

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

elif os.path.exists("/etc/centos-release"): distro = CentOS

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

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

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

distro = RHEL6

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

distro = CentOS

else:

distro = CentOS

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

else: distro = Unknown

logFileName=None

# ================== LIBRARY UTILITY CODE=============

def setLogFile(logFile):

global logFileName

logFileName=logFile

def read_properties(propfile):

if not hasattr(propfile,"read"): propfile = file(propfile)

properties = propfile.read().splitlines()

properties = [ s.strip() for s in properties ]

properties = [ s for s in properties if

s and

not s.startswith("#") and

not s.startswith(";") ]

#[ logging.debug("Valid config file line: %s",s) for s in properties ]

proppairs = [ s.split("=",1) for s in properties ]

return dict(proppairs)

def stderr(msgfmt,*args):

"""Print a message to stderr, optionally interpolating the arguments into it"""

msgfmt += "\n"

if logFileName != None:

sys.stderr = open(logFileName, 'a+')

if args: sys.stderr.write(msgfmt%args)

else: sys.stderr.write(msgfmt)

def exit(errno=E_GENERIC,message=None,*args):

"""Exit with an error status code, printing a message to stderr if specified"""

if message: stderr(message,*args)

sys.exit(errno)

def resolve(host,port):

return [ (x[4][0],len(x[4])+2) for x in socket.getaddrinfo(host,port,socket.AF_UNSPEC,socket.SOCK_STREAM, 0, socket.AI_PASSIVE) ]

def resolves_to_ipv6(host,port):

return resolve(host,port)[0][1] == IPV6

###add this to Python 2.4, patching the subprocess module at runtime

if hasattr(subprocess,"check_call"):

from subprocess import CalledProcessError, check_call

else:

class CalledProcessError(Exception):

def __init__(self, returncode, cmd):

self.returncode = returncode ; self.cmd = cmd

def __str__(self): return "Command '%s' returned non-zero exit status %d" % (self.cmd, self.returncode)

subprocess.CalledProcessError = CalledProcessError

def check_call(*popenargs, **kwargs):

retcode = subprocess.call(*popenargs, **kwargs)

cmd = kwargs.get("args")

if cmd is None: cmd = popenargs[0]

if retcode: raise subprocess.CalledProcessError(retcode, cmd)

return retcode

subprocess.check_call = check_call

# python 2.4 does not have this

try:

any = any

all = all

except NameError:

def any(sequence):

for i in sequence:

if i: return True

return False

def all(sequence):

for i in sequence:

if not i: return False

return True

class Command:

"""This class simulates a shell command"""

def __init__(self,name,parent=None):

self.__name = name

self.__parent = parent

def __getattr__(self,name):

if name == "_print": name = "print"

return Command(name,self)

def __call__(self,*args,**kwargs):

cmd = self.__get_recursive_name() + list(args)

#print " ",cmd

kwargs = dict(kwargs)

if "stdout" not in kwargs: kwargs["stdout"] = subprocess.PIPE

if "stderr" not in kwargs: kwargs["stderr"] = subprocess.PIPE

popen = subprocess.Popen(cmd,**kwargs)

m = popen.communicate()

ret = popen.wait()

if ret:

e = CalledProcessError(ret,cmd)

e.stdout,e.stderr = m

raise e

class CommandOutput:

def __init__(self,stdout,stderr):

self.stdout = stdout

self.stderr = stderr

return CommandOutput(*m)

def __lt__(self,other):

cmd = self.__get_recursive_name()

#print " ",cmd,"<",other

popen = subprocess.Popen(cmd,stdin=subprocess.PIPE,stdout=subprocess.PIPE,stderr=subprocess.PIPE)

m = popen.communicate(other)

ret = popen.wait()

if ret:

e = CalledProcessError(ret,cmd)

e.stdout,e.stderr = m

raise e

class CommandOutput:

def __init__(self,stdout,stderr):

self.stdout = stdout

self.stderr = stderr

return CommandOutput(*m)

def __get_recursive_name(self,sep=None):

m = self

l = []

while m is not None:

l.append(m.__name)

m = m.__parent

l.reverse()

if sep: return sep.join(l)

else: return l

def __str__(self):

return '<Command %r>'%self.__get_recursive_name(sep=" ")

def __repr__(self): return self.__str__()

kvmok = Command("kvm-ok")

getenforce = Command("/usr/sbin/getenforce")

ip = Command("ip")

service = Command("service")

chkconfig = Command("chkconfig")

updatercd = Command("update-rc.d")

ufw = Command("ufw")

iptables = Command("iptables")

iptablessave = Command("iptables-save")

augtool = Command("augtool")

ifconfig = Command("ifconfig")

ifdown = Command("ifdown")

ifup = Command("ifup")

brctl = Command("brctl")

uuidgen = Command("uuidgen")

def is_service_running(servicename):

try:

o = service(servicename,"status")

if distro is Ubuntu:

# status in ubuntu does not signal service status via return code

if "start/running" in o.stdout: return True

return False

else:

# retcode 0, service running

return True

except CalledProcessError,e:

# retcode nonzero, service not running

return False

def stop_service(servicename,force=False):

# This function is idempotent. N number of calls have the same result as N+1 number of calls.

if is_service_running(servicename) or force: service(servicename,"stop",stdout=None,stderr=None)

def disable_service(servicename):

# Stops AND disables the service

stop_service(servicename)

if distro is Ubuntu:

updatercd("-f",servicename,"remove",stdout=None,stderr=None)

else:

chkconfig("--del",servicename,stdout=None,stderr=None)

def start_service(servicename,force=False):

# This function is idempotent unless force is True. N number of calls have the same result as N+1 number of calls.

if not is_service_running(servicename) or force: service(servicename,"start",stdout=None,stderr=None)

def enable_service(servicename,forcestart=False):

# Stops AND disables the service

if distro is Ubuntu:

updatercd("-f",servicename,"remove",stdout=None,stderr=None)

updatercd("-f",servicename,"start","2","3","4","5",".",stdout=None,stderr=None)

else:

chkconfig("--add",servicename,stdout=None,stderr=None)

chkconfig("--level","345",servicename,"on",stdout=None,stderr=None)

start_service(servicename,force=forcestart)

def replace_line(f,startswith,stanza,always_add=False):

lines = [ s.strip() for s in file(f).readlines() ]

newlines = []

replaced = False

for line in lines:

if line.startswith(startswith):

newlines.append(stanza)

replaced = True

else: newlines.append(line)

if not replaced and always_add: newlines.append(stanza)

newlines = [ s + '\n' for s in newlines ]

file(f,"w").writelines(newlines)

def replace_or_add_line(f,startswith,stanza):

return replace_line(f,startswith,stanza,always_add=True)

# ==================================== CHECK FUNCTIONS ==========================

# If they return without exception, it's okay. If they raise a CheckFailed exception, that means a condition

# (generallly one that needs administrator intervention) was detected.

class CheckFailed(Exception): pass

#check function

def check_hostname():

"""If the hostname is a non-fqdn, fail with CalledProcessError. Else return 0."""

try: check_call(["hostname",'--fqdn'])

except CalledProcessError:

raise CheckFailed("This machine does not have an FQDN (fully-qualified domain name) for a hostname")

#check function

def check_kvm():

if distro in (Fedora,CentOS,RHEL6):

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

raise CheckFailed("KVM is not correctly installed on this system, or support for it is not enabled in the BIOS")

else:

try:

kvmok()

return True

except CalledProcessError:

raise CheckFailed("KVM is not correctly installed on this system, or support for it is not enabled in the BIOS")

except OSError,e:

if e.errno is errno.ENOENT: raise CheckFailed("KVM is not correctly installed on this system, or support for it is not enabled in the BIOS")

raise

return True

raise AssertionError, "check_kvm() should have never reached this part"

def check_cgroups():

return glob.glob("/*/cpu.shares")

#check function

def check_selinux():

if distro not in [Fedora,CentOS,RHEL6]: return # no selinux outside of those

enforcing = False

try:

output = getenforce().stdout.strip()

if "nforcing" in output:

enforcing = True

if any ( [ s.startswith("SELINUX=enforcing") for s in file("/etc/selinux/config").readlines() ] ):

config_enforcing = True

else:

config_enforcing = False

except (IOError,OSError),e:

if e.errno == 2: pass

else: raise CheckFailed("An unknown error (%s) took place while checking for SELinux"%str(e))

if enforcing:

raise CheckFailed('''SELinux is set to enforcing. There are two options:

1> Set it permissive in /etc/selinux/config, then reboot the machine.

2> Type 'setenforce Permissive' in commandline, after which you can run this program again.

We strongly suggest you doing the option 1 that makes sure SELinux goes into permissive after system reboot.\n''')

if config_enforcing:

print "WARNING: We detected that your SELinux is not configured in permissive. to make sure cloudstack won't block by \

SELinux after system reboot, we strongly suggest you setting it in permissive in /etc/selinux/config, then reboot the machine."

def preflight_checks(do_check_kvm=True):

if distro is Ubuntu:

preflight_checks = [

(check_hostname,"Checking hostname"),

]

else:

preflight_checks = [

(check_hostname,"Checking hostname"),

(check_selinux,"Checking if SELinux is disabled"),

]

#preflight_checks.append( (check_cgroups,"Checking if the control groups /cgroup filesystem is mounted") )

if do_check_kvm: preflight_checks.append( (check_kvm,"Checking for KVM") )

return preflight_checks

# ========================== CONFIGURATION TASKS ================================

# A Task is a function that runs within the context of its run() function that runs the function execute(), which does several things, reporting back to the caller as it goes with the use of yield

# the done() method ought to return true if the task has run in the past

# the execute() method must implement the configuration act itself

# run() wraps the output of execute() within a Starting taskname and a Completed taskname message

# tasks have a name

class TaskFailed(Exception): pass

#def __init__(self,code,msg):

#Exception.__init__(self,msg)

#self.code = code

class ConfigTask:

name = "generic config task"

autoMode=False

def __init__(self): pass

def done(self):

"""Returns true if the config task has already been done in the past, false if it hasn't"""

return False

def execute(self):

"""Executes the configuration task. Must not be run if test() returned true.

Must yield strings that describe the steps in the task.

Raises TaskFailed if the task failed at some step.

"""

def run (self):

stderr("Starting %s"%self.name)

it = self.execute()

if not it:

pass # not a yielding iterable

else:

for msg in it: stderr(msg)

stderr("Completed %s"%self.name)

def setAutoMode(self, autoMode):

self.autoMode = autoMode

def isAutoMode(self):

return self.autoMode

# ============== these are some configuration tasks ==================

class SetupNetworking(ConfigTask):

name = "network setup"

def __init__(self,brname, pubNic, prvNic):

ConfigTask.__init__(self)

self.brname = brname

self.pubNic = pubNic

self.prvNic = prvNic

self.runtime_state_changed = False

self.was_nm_service_running = None

self.was_net_service_running = None

if distro in (Fedora, CentOS, RHEL6):

self.nmservice = 'NetworkManager'

self.netservice = 'network'

else:

self.nmservice = 'network-manager'

self.netservice = 'networking'

def done(self):

try:

alreadysetup = False

if distro in (Fedora,CentOS, RHEL6):

if self.pubNic != None:

alreadysetup = alreadysetup or augtool._print("/files/etc/sysconfig/network-scripts/ifcfg-%s"%self.pubNic).stdout.strip()

if self.prvNic != None:

alreadysetup = alreadysetup or augtool._print("/files/etc/sysconfig/network-scripts/ifcfg-%s"%self.prvNic).stdout.strip()

if not alreadysetup:

alreadysetup = augtool._print("/files/etc/sysconfig/network-scripts/ifcfg-%s"%self.brname).stdout.strip()

else:

if self.pubNic != None:

alreadysetup = alreadysetup or augtool._print("/files/etc/network/interfaces/iface",self.pubNic).stdout.strip()

if self.prvNic != None:

alreadysetup = alreadysetup or augtool._print("/files/etc/network/interfaces/iface",self.prvNic).stdout.strip()

if not alreadysetup:

alreadysetup = augtool.match("/files/etc/network/interfaces/iface",self.brname).stdout.strip()

return alreadysetup

except OSError,e:

if e.errno is 2: raise TaskFailed("augtool has not been properly installed on this system")

raise

def restore_state(self):

if not self.runtime_state_changed: return

try:

o = ifconfig(self.brname)

bridge_exists = True

except CalledProcessError,e:

print e.stdout + e.stderr

bridge_exists = False

if bridge_exists:

ifconfig(self.brname,"0.0.0.0")

if hasattr(self,"old_net_device"):

ifdown(self.old_net_device)

ifup(self.old_net_device)

try: ifdown(self.brname)

except CalledProcessError: pass

try: ifconfig(self.brname,"down")

except CalledProcessError: pass

try: brctl("delbr",self.brname)

except CalledProcessError: pass

try: ifdown("--force",self.brname)

except CalledProcessError: pass

if self.was_net_service_running is None:

# we do nothing

pass

elif self.was_net_service_running == False:

stop_service(self.netservice,force=True)

time.sleep(1)

else:

# we altered service configuration

stop_service(self.netservice,force=True)

time.sleep(1)

try: start_service(self.netservice,force=True)

except CalledProcessError,e:

if e.returncode == 1: pass

else: raise

time.sleep(1)

if self.was_nm_service_running is None:

# we do nothing

pass

elif self.was_nm_service_running == False:

stop_service(self.nmservice,force=True)

time.sleep(1)

else:

# we altered service configuration

stop_service(self.nmservice,force=True)

time.sleep(1)

start_service(self.nmservice,force=True)

time.sleep(1)

self.runtime_state_changed = False

def execute(self):

yield "Determining default route"

routes = ip.route().stdout.splitlines()

defaultroute = [ x for x in routes if x.startswith("default") ]

if not defaultroute: raise TaskFailed("Your network configuration does not have a default route")

dev = defaultroute[0].split()[4]

yield "Default route assigned to device %s"%dev

self.old_net_device = dev

if distro in (Fedora, CentOS, RHEL6):

inconfigfile = "/".join(augtool.match("/files/etc/sysconfig/network-scripts/*/DEVICE",dev).stdout.strip().split("/")[:-1])

if not inconfigfile: raise TaskFailed("Device %s has not been set up in /etc/sysconfig/network-scripts"%dev)

pathtoconfigfile = inconfigfile[6:]

if distro in (Fedora, CentOS, RHEL6):

automatic = augtool.match("%s/ONBOOT"%inconfigfile,"yes").stdout.strip()

else:

automatic = augtool.match("/files/etc/network/interfaces/auto/*/",dev).stdout.strip()

if not automatic:

if distro is Fedora: raise TaskFailed("Device %s has not been set up in %s as automatic on boot"%dev,pathtoconfigfile)

else: raise TaskFailed("Device %s has not been set up in /etc/network/interfaces as automatic on boot"%dev)

if distro not in (Fedora , CentOS, RHEL6):

inconfigfile = augtool.match("/files/etc/network/interfaces/iface",dev).stdout.strip()

if not inconfigfile: raise TaskFailed("Device %s has not been set up in /etc/network/interfaces"%dev)

if distro in (Fedora, CentOS, RHEL6):

isstatic = augtool.match(inconfigfile + "/BOOTPROTO","none").stdout.strip()

if not isstatic: isstatic = augtool.match(inconfigfile + "/BOOTPROTO","static").stdout.strip()

else:

isstatic = augtool.match(inconfigfile + "/method","static").stdout.strip()

if not isstatic:

if distro in (Fedora, CentOS, RHEL6): raise TaskFailed("Device %s has not been set up as a static device in %s"%(dev,pathtoconfigfile))

else: raise TaskFailed("Device %s has not been set up as a static device in /etc/network/interfaces"%dev)

if is_service_running(self.nmservice):

self.was_nm_service_running = True

yield "Stopping NetworkManager to avoid automatic network reconfiguration"

disable_service(self.nmservice)

else:

self.was_nm_service_running = False

if is_service_running(self.netservice):

self.was_net_service_running = True

else:

self.was_net_service_running = False

yield "Creating Cloud bridging device and making device %s member of this bridge"%dev

if distro in (Fedora, CentOS, RHEL6):

ifcfgtext = file(pathtoconfigfile).read()

newf = "/etc/sysconfig/network-scripts/ifcfg-%s"%self.brname

#def restore():

#try: os.unlink(newf)

#except OSError,e:

#if errno == 2: pass

#raise

#try: file(pathtoconfigfile,"w").write(ifcfgtext)

#except OSError,e: raise

f = file(newf,"w") ; f.write(ifcfgtext) ; f.flush() ; f.close()

innewconfigfile = "/files" + newf

script = """set %s/DEVICE %s

set %s/NAME %s

set %s/BRIDGE_PORTS %s

set %s/TYPE Bridge

rm %s/HWADDR

rm %s/UUID

rm %s/HWADDR

rm %s/IPADDR

rm %s/DEFROUTE

rm %s/NETMASK

rm %s/GATEWAY

rm %s/BROADCAST

rm %s/NETWORK

set %s/BRIDGE %s

save"""%(innewconfigfile,self.brname,innewconfigfile,self.brname,innewconfigfile,dev,

innewconfigfile,innewconfigfile,innewconfigfile,innewconfigfile,

inconfigfile,inconfigfile,inconfigfile,inconfigfile,inconfigfile,inconfigfile,

inconfigfile,self.brname)

yield "Executing the following reconfiguration script:\n%s"%script

try:

returned = augtool < script

if "Saved 2 file" not in returned.stdout:

print returned.stdout + returned.stderr

#restore()

raise TaskFailed("Network reconfiguration failed.")

else:

yield "Network reconfiguration complete"

except CalledProcessError,e:

#restore()

print e.stdout + e.stderr

raise TaskFailed("Network reconfiguration failed")

else: # Not fedora

backup = file("/etc/network/interfaces").read(-1)

#restore = lambda: file("/etc/network/interfaces","w").write(backup)

script = """set %s %s

set %s %s

set %s/bridge_ports %s

save"""%(automatic,self.brname,inconfigfile,self.brname,inconfigfile,dev)

yield "Executing the following reconfiguration script:\n%s"%script

try:

returned = augtool < script

if "Saved 1 file" not in returned.stdout:

#restore()

raise TaskFailed("Network reconfiguration failed.")

else:

yield "Network reconfiguration complete"

except CalledProcessError,e:

#restore()

print e.stdout + e.stderr

raise TaskFailed("Network reconfiguration failed")

yield "We are going to restart network services now, to make the network changes take effect. Hit ENTER when you are ready."

if self.isAutoMode(): pass

else:

raw_input()

# if we reach here, then if something goes wrong we should attempt to revert the runinng state

# if not, then no point

self.runtime_state_changed = True

yield "Enabling and restarting non-NetworkManager networking"

if distro is Ubuntu: ifup(self.brname,stdout=None,stderr=None)

stop_service(self.netservice)

try: enable_service(self.netservice,forcestart=True)

except CalledProcessError,e:

if e.returncode == 1: pass

else: raise

yield "Verifying that the bridge is up"

try:

o = ifconfig(self.brname)

except CalledProcessError,e:

print e.stdout + e.stderr

raise TaskFailed("The bridge could not be set up properly")

yield "Networking restart done"

class SetupCgConfig(ConfigTask):

name = "control groups configuration"

def done(self):

try:

return "group virt" in file("/etc/cgconfig.conf","r").read(-1)

except IOError,e:

if e.errno is 2: raise TaskFailed("cgconfig has not been properly installed on this system")

raise

def execute(self):

cgconfig = file("/etc/cgconfig.conf","r").read(-1)

cgconfig = cgconfig + """

group virt {

cpu {

cpu.shares = 9216;

}

}

"""

file("/etc/cgconfig.conf","w").write(cgconfig)

stop_service("cgconfig")

enable_service("cgconfig",forcestart=True)

class SetupCgRules(ConfigTask):

name = "control group rules setup"

cfgline = "root:/usr/sbin/libvirtd cpu virt/"

def done(self):

try:

return self.cfgline in file("/etc/cgrules.conf","r").read(-1)

except IOError,e:

if e.errno is 2: raise TaskFailed("cgrulesd has not been properly installed on this system")

raise

def execute(self):

cgrules = file("/etc/cgrules.conf","r").read(-1)

cgrules = cgrules + "\n" + self.cfgline + "\n"

file("/etc/cgrules.conf","w").write(cgrules)

stop_service("cgred")

enable_service("cgred")

class SetupCgroupControllers(ConfigTask):

name = "qemu cgroup controllers setup"

cfgline = "cgroup_controllers = [ \"cpu\" ]"

filename = "/etc/libvirt/qemu.conf"

def done(self):

try:

return self.cfgline in file(self.filename,"r").read(-1)

except IOError,e:

if e.errno is 2: raise TaskFailed("qemu has not been properly installed on this system")

raise

def execute(self):

libvirtqemu = file(self.filename,"r").read(-1)

libvirtqemu = libvirtqemu + "\n" + self.cfgline + "\n"

file("/etc/libvirt/qemu.conf","w").write(libvirtqemu)

class SetupSecurityDriver(ConfigTask):

name = "security driver setup"

cfgline = "security_driver = \"none\""

filename = "/etc/libvirt/qemu.conf"

def done(self):

try:

return self.cfgline in file(self.filename,"r").read(-1)

except IOError,e:

if e.errno is 2: raise TaskFailed("qemu has not been properly installed on this system")

raise

def execute(self):

libvirtqemu = file(self.filename,"r").read(-1)

libvirtqemu = libvirtqemu + "\n" + self.cfgline + "\n"

file("/etc/libvirt/qemu.conf","w").write(libvirtqemu)

class SetupLibvirt(ConfigTask):

name = "libvirt setup"

cfgline = "export CGROUP_DAEMON='cpu:/virt'"

def done(self):

try:

if distro in (Fedora,CentOS, RHEL6): libvirtfile = "/etc/sysconfig/libvirtd"

elif distro is Ubuntu: libvirtfile = "/etc/default/libvirt-bin"

else: raise AssertionError, "We should not reach this"

return self.cfgline in file(libvirtfile,"r").read(-1)

except IOError,e:

if e.errno is 2: raise TaskFailed("libvirt has not been properly installed on this system")

raise

def execute(self):

if distro in (Fedora,CentOS, RHEL6): libvirtfile = "/etc/sysconfig/libvirtd"

elif distro is Ubuntu: libvirtfile = "/etc/default/libvirt-bin"

else: raise AssertionError, "We should not reach this"

libvirtbin = file(libvirtfile,"r").read(-1)

libvirtbin = libvirtbin + "\n" + self.cfgline + "\n"

file(libvirtfile,"w").write(libvirtbin)

if distro in (CentOS, Fedora, RHEL6): svc = "libvirtd"

else: svc = "libvirt-bin"

stop_service(svc)

enable_service(svc)

class SetupLiveMigration(ConfigTask):

name = "live migration setup"

stanzas = (

"listen_tcp=1",

'tcp_port="16509"',

'auth_tcp="none"',

"listen_tls=0",

)

def done(self):

try:

lines = [ s.strip() for s in file("/etc/libvirt/libvirtd.conf").readlines() ]

if all( [ stanza in lines for stanza in self.stanzas ] ): return True

except IOError,e:

if e.errno is 2: raise TaskFailed("libvirt has not been properly installed on this system")

raise

def execute(self):

for stanza in self.stanzas:

startswith = stanza.split("=")[0] + '='

replace_or_add_line("/etc/libvirt/libvirtd.conf",startswith,stanza)

if distro in (Fedora, RHEL6):

replace_or_add_line("/etc/sysconfig/libvirtd","LIBVIRTD_ARGS=","LIBVIRTD_ARGS=-l")

elif distro is Ubuntu:

if os.path.exists("/etc/init/libvirt-bin.conf"):

replace_line("/etc/init/libvirt-bin.conf", "exec /usr/sbin/libvirtd","exec /usr/sbin/libvirtd -d -l")

else:

replace_or_add_line("/etc/default/libvirt-bin","libvirtd_opts=","libvirtd_opts='-l -d'")

else:

raise AssertionError("Unsupported distribution")

if distro in (CentOS, Fedora, RHEL6): svc = "libvirtd"

else: svc = "libvirt-bin"

stop_service(svc)

enable_service(svc)

class SetupRequiredServices(ConfigTask):

name = "required services setup"

def done(self):

if distro in (Fedora, RHEL6): nfsrelated = "rpcbind nfslock"

elif distro is CentOS: nfsrelated = "portmap nfslock"

else: return True

return all( [ is_service_running(svc) for svc in nfsrelated.split() ] )

def execute(self):

if distro in (Fedora, RHEL6): nfsrelated = "rpcbind nfslock"

elif distro is CentOS: nfsrelated = "portmap nfslock"

else: raise AssertionError("Unsupported distribution")

for svc in nfsrelated.split(): enable_service(svc)

class SetupFirewall(ConfigTask):

name = "firewall setup"

def done(self):

if distro in (Fedora, CentOS,RHEL6):

if not os.path.exists("/etc/sysconfig/iptables"): return True

if ":on" not in chkconfig("--list","iptables").stdout: return True

else:

if "Status: active" not in ufw.status().stdout: return True

if not os.path.exists("/etc/ufw/before.rules"): return True

rule = "-p tcp -m tcp --dport 16509 -j ACCEPT"

if rule in iptablessave().stdout: return True

return False

def execute(self):

ports = "22 1798 16509".split()

if distro in (Fedora , CentOS, RHEL6):

for p in ports: iptables("-I","INPUT","1","-p","tcp","--dport",p,'-j','ACCEPT')

o = service.iptables.save() ; print o.stdout + o.stderr

else:

for p in ports: ufw.allow(p)

class SetupFirewall2(ConfigTask):

# this closes bug 4371

name = "additional firewall setup"

def __init__(self,brname):

ConfigTask.__init__(self)

self.brname = brname

def done(self):

if distro in (Fedora, CentOS, RHEL6):

if not os.path.exists("/etc/sysconfig/iptables"): return True

if ":on" not in chkconfig("--list","iptables").stdout: return True

return False

else:

if "Status: active" not in ufw.status().stdout: return True

if not os.path.exists("/etc/ufw/before.rules"): return True

return False

def execute(self):

yield "Permitting traffic in the bridge interface, migration port and for VNC ports"

if distro in (Fedora , CentOS, RHEL6):

for rule in (

"-I INPUT 1 -p tcp --dport 5900:6100 -j ACCEPT",

"-I INPUT 1 -p tcp --dport 49152:49216 -j ACCEPT",

):

args = rule.split()

o = iptables(*args)

service.iptables.save(stdout=None,stderr=None)

else:

ufw.allow.proto.tcp("from","any","to","any","port","5900:6100")

ufw.allow.proto.tcp("from","any","to","any","port","49152:49216")

stop_service("ufw")

start_service("ufw")

# Tasks according to distribution -- at some point we will split them in separate modules

def config_tasks(brname, pubNic, prvNic):

if distro is CentOS:

config_tasks = (

SetupNetworking(brname, pubNic, prvNic),

SetupLibvirt(),

SetupRequiredServices(),

SetupFirewall(),

SetupFirewall2(brname),

)

elif distro in (Ubuntu,Fedora, RHEL6):

config_tasks = (

SetupNetworking(brname, pubNic, prvNic),

SetupCgConfig(),

SetupCgRules(),

SetupCgroupControllers(),

SetupSecurityDriver(),

SetupLibvirt(),

SetupLiveMigration(),

SetupRequiredServices(),

SetupFirewall(),

SetupFirewall2(brname),

)

else:

raise AssertionError("Unknown distribution")

return config_tasks

def backup_etc(targetdir):

if not targetdir.endswith("/"): targetdir += "/"

check_call( ["mkdir","-p",targetdir] )

rsynccall = ["rsync","-ax","--delete"] + ["/etc/",targetdir]

check_call( rsynccall )

def restore_etc(targetdir):

if not targetdir.endswith("/"): targetdir += "/"

rsynccall = ["rsync","-ax","--delete"] + [targetdir,"/etc/"]

check_call( rsynccall )

def remove_backup(targetdir):

check_call( ["rm","-rf",targetdir] )

def list_zonespods(host):

text = urllib2.urlopen('http://%s:8096/client/api?command=listPods'%host).read(-1)

dom = xml.dom.minidom.parseString(text)

x = [ (zonename,podname)

for pod in dom.childNodes[0].childNodes

for podname in [ x.childNodes[0].wholeText for x in pod.childNodes if x.tagName == "name" ]

for zonename in [ x.childNodes[0].wholeText for x in pod.childNodes if x.tagName == "zonename" ]

]

return x

def prompt_for_hostpods(zonespods):

"""Ask user to select one from those zonespods

Returns (zone,pod) or None if the user made the default selection."""

while True:

stderr("Type the number of the zone and pod combination this host belongs to (hit ENTER to skip this step)")

print " N) ZONE, POD"

print "================"

for n,(z,p) in enumerate(zonespods):

print "%3d) %s, %s"%(n,z,p)

print "================"

print "> ",

zoneandpod = raw_input().strip()

if not zoneandpod:

# we go with default, do not touch anything, just break

return None

try:

# if parsing fails as an int, just vomit and retry

zoneandpod = int(zoneandpod)

if zoneandpod >= len(zonespods) or zoneandpod < 0: raise ValueError, "%s out of bounds"%zoneandpod

except ValueError,e:

stderr(str(e))

continue # re-ask

# oh yeah, the int represents an valid zone and pod index in the array

return zonespods[zoneandpod]

# this configures the agent

def device_exist(devName):

try:

alreadysetup = False

if distro in (Fedora,CentOS, RHEL6):

alreadysetup = augtool._print("/files/etc/sysconfig/network-scripts/ifcfg-%s"%devName).stdout.strip()

else:

alreadysetup = augtool.match("/files/etc/network/interfaces/iface",devName).stdout.strip()

return alreadysetup

except OSError,e:

return False

def setup_agent_config(configfile, host, zone, pod, cluster, guid, pubNic, prvNic):

stderr("Examining Agent configuration")

fn = configfile

text = file(fn).read(-1)

lines = [ s.strip() for s in text.splitlines() ]

confopts = dict([ m.split("=",1) for m in lines if "=" in m and not m.startswith("#") ])

confposes = dict([ (m.split("=",1)[0],n) for n,m in enumerate(lines) if "=" in m and not m.startswith("#") ])

if guid != None:

confopts['guid'] = guid

else:

if not "guid" in confopts:

stderr("Generating GUID for this Agent")

confopts['guid'] = uuidgen().stdout.strip()

if host == None:

try: host = confopts["host"]

except KeyError: host = "localhost"

stderr("Please enter the host name of the management server that this agent will connect to: (just hit ENTER to go with %s)",host)

print "> ",

newhost = raw_input().strip()

if newhost: host = newhost

confopts["host"] = host

if pubNic != None and device_exist(pubNic):

confopts["public.network.device"] = pubNic

if prvNic == None or not device_exist(prvNic):

confopts["private.network.device"] = pubNic

if prvNic != None and device_exist(prvNic):

confopts["private.network.device"] = prvNic

if pubNic == None or not device_exist(pubNic):

confopts["public.network.device"] = prvNic

stderr("Querying %s for zones and pods",host)