KVM Script Bulk Add delete virtual machine version 2

On the basis of the original, do some functional additions.

1. To modify the host name of a virtual machine
   

2. Modifying a virtual machine's Mac

3. Modifying the IP of a virtual machine

4. Virtual machines in qcow2 format, using Qemu-img's backing_file technology to quickly generate virtual machines

This allows the virtual machine to be managed remotely when it is created.

For the 1th edition, please refer to:

http://5ydycm.blog.51cto.com/115934/1211630

2nd edition, create_delete_vm.py code:

#!/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  moduleimport shutilimport os,sysfrom virtinst.util import *import  libvirtimport reimport subprocessimport guestfsimport jinja2if sys.version_info  <  (2,5):        import lxml.etree as  Etelse:    &nBsp;   import xml.etree.elementtree as et#define variablestemplate_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&NBSP;=&NBSP;JINJA2. Environment (&NBSP;&NBSP;&NBSP;&NBSP;LOADER=JINJA2. Filesystemloader (         '/template/jinja '     )) Def file_exists (file):     if os.path.exists (file):         return 1    else:         Return 0def 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:     &nbsP;  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&NBSP;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  "=" *100DEF&NBSP;EDIT_VM (dst_img_file,vm_mac,vm_ip,hostname): &NBsp;   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 ' &NBsp;   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}&NBSP;&NBsp;  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 &NBSP;2&NBSP;EDIT&NBSP;VM&NBSP;&NBSP;&NBSP;&NBSP;EDIT_VM (Dst_img_file,vm_mac, Vm_ip,hostname)      #Function  3 Start VM    print  " start vm  "+HOSTNAME&NBSP;&NBSP;&NBSP;&NBSP;START_VM (vm_xml_file,vm_name) Def delete_File (file_name):     if file_exists (file_name):         os.unlink (file_name) DEF&NBSP;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&nbsP 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 &NBSP;CONFIG&NBSP;FILEFH =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&NBSP;VM "&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;DELETE_VM (vm_name)

Configuration files for virtual machines:

Vm.ini

#Action, Vm_name,template_img_file,template_xml_file,vm_ipadd,web20,template_centos63x64.img,template_ Centos63x64.xml,192.168.x.26add,web30,template_centos63x64.img,template_centos63x64.xml,192.168.x.27#delete, Web20,none,none,none#delete,web30,none,none,none

Jinja Related configuration Files

Hostname.jinja hostname={{hostname}}networking=yes# ipv4networking=yesnozeroconf=yes# ipv6,  necessary for bondingNETWORKING_IPV6=yesIPV6INIT=yesmac.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=255.255.255.0gateway=192.168.x.254nm_controlled= "yes" onboot= "yes" TYPE= "Ethernet" 

Batch generation is as follows:

[email protected] 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 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 Running Web30
done!
====================================================================================================

For reference!

This article is from the "Bad Boy" blog, make sure to keep this source http://5ydycm.blog.51cto.com/115934/1603999

KVM Script Bulk Add delete virtual machine version 2