XenServer - Script python backups programados de máquinas virtuales

Este es un script que encontré en:
https://gist.github.com/davidahmad/9f010c180ad8bf9a13a52041db3a55f7

Con el Crontab -e se programa:
10 18 * * * /usr/bin/python /home/backupVMCCC.py &> /var/log/crontablog.txt
30 00 * * * find /mnt/carpetaNAS/*.xva -mtime +20 -exec rm {} \;


Y que lo he modificado ligeramente.

#! /usr/bin/env python

import datetime
import os
import subprocess
import sys
import commands

#Input the NFS path or local file with forward slash (/) at the end.
#example: NFSPATH = "/var/run/sr-mount/111111ee-99ww-iw9w-jcw8-7394792jd83e/"
NFSPATH = "/mnt/carpetaNAS/"
USUARIO = "josemari"
CLAVE = "OFICINA"
CARPETAREMOTA = "//192.168.1.150/josemari"

# Object that holds the name and uuid of a virtual machine
class VirtualMachine(object):
    name = " "

    uuid = " "

   
    def insertName(self,name):
        self.name = name


    def insertUUID(self,uuid):
        self.uuid = uuid
   
#Primero creamos la carpeta local NFS en caso de no existir
if not os.path.exists(NFSPATH): os.makedirs(NFSPATH)

#Ahora montamos la carpeta NFS en caso de aun no estarlo
if not os.path.ismount(NFSPATH): os.system("mount -t cifs -o username=" + USUARIO + ",password=" + CLAVE + " " + CARPETAREMOTA + " " + NFSPATH)

#stores all virtual machine name & uuid information into the vmList variable.
vmList = commands.getoutput("xe vm-list is-control-domain=false is-a-snapshot=false | grep 'uuid\|name-label' | cut -d ':' -f2")

#initialize the list which will have VM objects stored into it.
listofVM=[]

counter = 0

indexNum = 0


#this for loop is responsible for assigning name values to the name variable in the VirtualMachine objects.
#VirtualMachine objects are created within this loop and appended into listofVM[]
for line in vmList.splitlines():

    counter+=1
    line = line.strip()
    VMObject = VirtualMachine()   
    #use counter mod 2 = 0 so that it only reads every other line.
    if counter % 2 == 0:
        VMObject.insertName(line)
        listofVM.append(VMObject)   

        indexNum += 1

#this for loop is responsible for assigning UUID values to the UUID variable in the VirtualMachine objects.
counter = 0;
indexNum=0
for line in vmList.splitlines():
    counter +=1
    line = line.strip()
    if counter %2 != 0:

        listofVM[indexNum].insertUUID(line)
       
        indexNum +=1       

#_____________________code above only creates the virtual machine information objects_________________________

#This loop reads the list of virtual machine objects and performs backups individually.
for VirtualMachine in listofVM:

    todaysdate = datetime.date.today()
    snapshotUUID = " "
    systemvar = 0
   
    print(todaysdate + " Starting backup process for " + VirtualMachine.name)
    print("Creating snapshot for " + VirtualMachine.name)
    snapshotUUID = commands.getoutput("xe vm-snapshot uuid='%s' new-name-label='%s_%s'" %(VirtualMachine.uuid, VirtualMachine.name,todaysdate))
   
    print("Converting snapshot to VM")
    #template set
    systemvar = os.system("xe template-param-set is-a-template=false ha-always-run=false uuid='%s'" %snapshotUUID)
    if systemvar == 0:
        print("conversion successful")
    else:
        print("Something went wrong: \n")
        print(systemvar)
        os.system("xe vm-uninstall uuid='%s' force=true" %snapshotUUID)
   
    print("Exporting to " + NFSPATH + ", VM= " + VirtualMachine.name + " backup to file path")
    #export backup into NFS
    systemvar = os.system("xe vm-export vm='%s' filename='%s%s_backup%s.xva' --compress " %(snapshotUUID,NFSPATH,VirtualMachine.name,todaysdate))
    if systemvar == 0:
        print(todaysdate + " Backup successful")
    else:
        print("Something went wrong: \n")
        print(systemvar)
        os.system("xe vm-uninstall uuid='%s' force=true" %snapshotUUID)
       
    #delete snapshot
    os.system("xe vm-uninstall uuid='%s' force=true" %snapshotUUID)

Este Script hay que copiarlo a una carpeta del XenServer y otorgar permisos de ejecución:

chmod +x "ficheroScript" 

Una vez hecho esto ya podemos programar nuestras copias de seguridad con la herramienta cron.

crontab -e 

En este caso lo he programado para ejecutarse en el minuto 0 de la hora 20, todos los días del mes, de todos los meses de todos los días de la semana.

0 20 * * * /usr/bin/python /home/backupVMCCC.py 

Escape y :wq