在原有的基础上,做些功能上的添加.
-
修改虚拟机的主机名
-
修改虚拟机的MAC
-
修改虚拟机的IP
-
虚拟机采用qcow2格式,使用qemu-img的backing_file技术,快速生成虚拟机
这样,虚拟机创建好后,便可以远程管理了。
第1版,请参考:
http://5ydycm.blog.51cto.com/115934/1211630
第2版,create_delete_vm.py代码:
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#!/usr/bin/env python
#coding:utf-8
###################################################################
#Auth:Zhuzhengjun
#LastModified:2015/01/14
#Version 1.0
#Function Description:
#Batch automatically generated/delete VM
#1.Generated VM
##1.1.Create qcow2 vm img file
##1.2.Create VM XML file
###1.2.1.Update UUID
###1.2.2.Update MAC
###1.2.3.Update img path
###1.2.4.Update VM Name
#2.Edit VM
##2.1.Edit HostName
##2.2.Edit Mac
##2.3.Edit IP
#3.Start VM
#4.Delete VM
####################################################################
#import module
import
shutil
import
os,sys
from
virtinst.util
import
*
import
libvirt
import
re
import
subprocess
import
guestfs
import
jinja2
if
sys.version_info < (
2
,
5
):
import
lxml.etree as ET
else
:
import
xml.etree.ElementTree as ET
#Define variables
template_img_path
=
"/template/img"
template_xml_path
=
"/template/xml"
vm_img_path
=
"/var/lib/libvirt/images"
vm_xml_path
=
"/etc/libvirt/qemu"
vm_file
=
"/template/scripts/vm.ini"
uri
=
"qemu:///system"
domain
=
".tc.com"
JINJA
=
jinja2.Environment(
loader
=
jinja2.FileSystemLoader(
'/template/jinja'
)
)
def
file_exists(
file
):
if
os.path.exists(
file
):
return
1
else
:
return
0
def
create_vm_img_file(src_img_file,dst_img_file):
command
=
"/usr/bin/qemu-img create -f qcow2 -o cluster_size=2M,backing_file="
+
src_img_file
+
" "
+
dst_img_file
+
" 20G"
try
:
subprocess.check_call(command,shell
=
True
)
except
subprocess.CalledProcessError as err:
print
"Error:"
,err
sys.exit(
1
)
print
"Done!"
'''
def copy_vm_img_file(src_img_file,dst_img_file):
print "Start Copy",src_img_file,"to",dst_img_file
if file_exists(dst_img_file):
print "File %s exists, abort" % dst_img_file
sys.exit(1)
shutil.copyfile(src_img_file,dst_img_file)
print "Done!"
'''
def
start_vm(vm_xml_file,vm_name):
try
:
conn
=
libvirt.
open
(uri)
except
Exception,e:
print
'Faild to open connection to the hypervisor'
sys.exit(
1
)
create
=
True
if
create:
xmlfile
=
open
(vm_xml_file)
xmldesc
=
xmlfile.read()
xmlfile.close()
try
:
vmname
=
conn.defineXML(xmldesc)
except
Exception,e:
print
"Failed to define %s:%s"
%
(vm_name,e)
sys.exit(
1
)
if
vmname
is
None
:
print
'whoops this shouldnt happen!'
try
:
vmname.create()
except
Exception,e:
print
"Failed to create %s:%s"
%
(vm_name,e)
sys.exit(
1
)
try
:
print
"Domain 0:id %d running %s"
%
(vmname.
ID
(),vmname.name())
except
Exception,e:
print
e
try
:
conn.close()
except
:
print
"Faild to close the connection!"
sys.exit(
1
)
print
"Done!"
print
"="
*
100
def
edit_vm(dst_img_file,vm_mac,vm_ip,hostname):
g
=
guestfs.GuestFS(python_return_dict
=
True
)
g.add_drive_opts(dst_img_file)
g.launch()
partions_root
=
g.inspect_os()
g.mount(partions_root[
0
],
'/'
)
#edit hostname
hostname_fn
=
'hostname.jinja'
try
:
template_hostname
=
JINJA.get_template(hostname_fn)
except
jinja2.exceptions.TemplateNotFound:
print
"error"
sys.exit(
1
)
hostname_context
=
{
'hostname'
:hostname}
hostname_content
=
template_hostname.render(
*
*
hostname_context)
g.write(
'/etc/sysconfig/network'
,hostname_content)
#edit mac
mac_fn
=
'mac.jinja'
try
:
template_mac
=
JINJA.get_template(mac_fn)
except
jinja2.exceptions.TemplateNotFound:
print
"error"
sys.exit(
1
)
mac_context
=
{
'mac'
:vm_mac}
mac_content
=
template_mac.render(
*
*
mac_context)
g.write(
'/etc/udev/rules.d/70-persistent-net.rules'
,mac_content)
#edit ip
net_fn
=
'net.jinja'
try
:
template_net
=
JINJA.get_template(net_fn)
except
jinja2.exceptions.TemplateNotFound:
print
"error"
sys.exit(
1
)
net_context
=
{
'mac'
:vm_mac,
'ip'
:vm_ip}
net_content
=
template_net.render(
*
*
net_context)
g.write(
'/etc/sysconfig/network-scripts/ifcfg-eth0'
,net_content)
g.close()
def
create_vm_xml_file(src_xml_file,vm_name,dst_img_file,vm_ip,hostname):
config
=
ET.parse(src_xml_file)
name
=
config.find(
'name'
)
name.text
=
vm_name.strip()
uuid
=
config.find(
'uuid'
)
uuid.text
=
uuidToString(randomUUID())
mac
=
config.find(
'devices/interface/mac'
)
vm_mac
=
randomMAC(
type
=
'qemu'
)
mac.attrib[
'address'
]
=
vm_mac
disk
=
config.find(
'devices/disk/source'
)
disk.attrib[
'file'
]
=
dst_img_file
vm_xml_name
=
vm_name.strip()
+
'.xml'
vm_xml_file
=
os.path.join(vm_xml_path,vm_xml_name)
if
file_exists(vm_xml_file):
print
"File %s exists, abort"
%
vm_xml_file
sys.exit(
1
)
config.write(vm_xml_file)
print
"Created vm config file %s"
%
vm_xml_file
#print "Use disk image %s, you must create it from the template disk: %s" % (disk_image, disk_old)
print
"Done!"
#Function 2 Edit VM
edit_vm(dst_img_file,vm_mac,vm_ip,hostname)
#Function 3 Start VM
print
"Start VM "
+
hostname
start_vm(vm_xml_file,vm_name)
def
delete_file(file_name):
if
file_exists(file_name):
os.unlink(file_name)
def
delete_vm(vm_name):
vmimg
=
vm_name
+
".qcow2"
vmxml
=
vm_name
+
".xml"
img_file
=
os.path.join(vm_img_path,vmimg)
xml_file
=
os.path.join(vm_xml_path,vmxml)
try
:
conn
=
libvirt.
open
(uri)
except
Exception,e:
print
'Faild to open connection to the hypervisor'
sys.exit(
1
)
try
:
server
=
conn.lookupByName(vm_name)
except
Exception,e:
print
e
sys.exit(
1
)
if
server.isActive():
print
"VM %s will be shutdown!"
%
vm_name
try
:
#server.shutdown()#VM need install acpid
server.destroy()
except
Exception,e:
print
e
sys.exit(
1
)
print
"VM %s will be delete!"
%
vm_name
try
:
server.undefine()
except
Exception,e:
print
e
sys.exit(
1
)
delete_file(img_file)
delete_file(xml_file)
try
:
conn.close()
except
:
print
"Faild to close the connection!"
sys.exit(
1
)
else
:
print
"VM %s will be delete!"
%
vm_name
try
:
server.undefine()
except
Exception,e:
print
e
sys.exit(
1
)
delete_file(img_file)
delete_file(xml_file)
print
"Done"
print
"="
*
100
###############Main############################################
#Open config file
fh
=
open
(vm_file)
vm_config
=
fh.readlines()
fh.close()
for
line
in
vm_config:
passline
=
re.
compile
(
"#.*"
)
if
re.search(passline,line)!
=
None
:
continue
(action,vm_name,src_file,xml_file,vm_ip)
=
line.strip().split(
","
)
hostname
=
vm_name
+
domain
if
action
=
=
'add'
:
src_img_file
=
os.path.join(template_img_path,src_file)
dst_img_file
=
os.path.join(vm_img_path,vm_name.strip()
+
".qcow2"
)
src_xml_file
=
os.path.join(template_xml_path,xml_file)
if
not
(file_exists(src_img_file)
and
file_exists(src_xml_file)):
print
"File %s or %s not exists,abort!"
%
(src_img_file,src_xml_file)
sys.exit(
1
)
#Function1.1 Create qcow2 vm img file
print
"Create VM "
+
hostname
+
" image file and file type qcow2"
create_vm_img_file(src_img_file,dst_img_file)
#Function1.2 Create VM XML file
print
"Create VM "
+
hostname
+
" Xml config file"
create_vm_xml_file(src_xml_file,vm_name,dst_img_file,vm_ip,hostname)
elif
action
=
=
"delete"
:
#Function4 Delete VM
print
"Delete VM"
delete_vm(vm_name)
|
虚拟机的配置文件:
vm.ini
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#Action,Vm_name,Template_img_file,Template_xml_file,vm_ip
add,web20,Template_Centos63x64.img,Template_Centos63x64.xml,
192.168
.x.
26
add,web30,Template_Centos63x64.img,Template_Centos63x64.xml,
192.168
.x.
27
#delete,web20,none,none,none
#delete,web30,none,none,none
|
jinja相关的配置文件
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hostname.jinja
HOSTNAME
=
`hostname`
NETWORKING
=
yes
# IPv4
NETWORKING
=
yes
NOZEROCONF
=
yes
# IPv6, necessary for bonding
NETWORKING_IPV6
=
yes
IPV6INIT
=
yes
mac.jinja
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.
# PCI device 0x1af4:0x1000 (virtio-pci)
#context={'macs':{'eth0': {'mac': 'mac0'}, 'eth1': {'mac': 'mac1'}}}
SUBSYSTEM
=
=
"net"
, ACTION
=
=
"add"
, DRIVERS
=
=
"?*"
, ATTR{address}
=
=
"`mac`"
, ATTR{
type
}
=
=
"1"
, KERNEL
=
=
"eth*"
, NAME
=
"eth0"
net.jinja
DEVICE
=
"eth0"
BOOTPROTO
=
"static"
HWADDR
=
`mac`
IPADDR
=
`ip`
NETMASK
=
255.255
.
255.0
GATEWAY
=
192.168
.x.
254
NM_CONTROLLED
=
"yes"
ONBOOT
=
"yes"
TYPE
=
"Ethernet"
|
批量生成如下:
[root@kvm scripts]# python create_delete_vm.py
Create VM web20.tc.com image file and file type qcow2
Formatting '/var/lib/libvirt/images/web20.qcow2', fmt=qcow2 size=21474836480 backing_file='/template/img/Template_Centos63x64.img' encryption=off cluster_size=2097152
Done!
Create VM web20.tc.com Xml config file
Created vm config file /etc/libvirt/qemu/web20.xml
Done!
Start VM web20.tc.com
Domain 0:id 60 running web20
Done!
====================================================================================================
Create VM web30.tc.com image file and file type qcow2
Formatting '/var/lib/libvirt/images/web30.qcow2', fmt=qcow2 size=21474836480 backing_file='/template/img/Template_Centos63x64.img' encryption=off cluster_size=2097152
Done!
Create VM web30.tc.com Xml config file
Created vm config file /etc/libvirt/qemu/web30.xml
Done!
Start VM web30.tc.com
Domain 0:id 61 running web30
Done!
====================================================================================================
供参考!
本文转自hahazhu0634 51CTO博客,原文链接:http://blog.51cto.com/5ydycm/1603999,如需转载请自行联系原作者