Xenserver functions for snapshots, export XVA Backup

vms.py

import functions

class VMs(object):
    def __init__(self, name, uuid, sr_uuid):
    self.name = name
    self.uuid = uuid
    #-------------------------#
    #Info about vms snapshots, templates and vdi/vm backup
    #sr-uuid is the storage place where vdi is.
    #-------------------------#
    self.name_parameter = name
    self.snap_uuid = None
    self.snap_label = None
    self.sruuid = sr_uuid
    self.vm_backup_name = None
    self.vm_backup_uuid = None
    self.place_to_backup = None

    def create_snapshot(self):
        try:
            date = str(functions.request_time(0))
            snap_label = 'Snapshot' + self.name + date
            snap_cmd = 'xe vm-snapshot uuid=' + self.uuid + ' new-name-label=' + snap_label
            create_snapshot_uuid = functions.run_cmd(snap_cmd)
            self.snap_label = snap_label
            self.snap_uuid = create_snapshot_uuid[:-1]
            functions.writing_log('create_snap', self.snap_label)
            functions.writing_log('create_snap_uuid', self.snap_uuid)
        except:
            functions.writing_except_log('An error was occured while creating snapshot')

    def convert_snap_template(self):
        try:
            temp_cmd = 'xe template-param-set is-a-template=false uuid=' + self.snap_uuid
            convert = functions.run_cmd(temp_cmd)
            functions.writing_log('create_template')
        except:
            functions.writing_except_log('An error was occured while converting snapshot in a template')

    def convert_template_vm(self):
        try:
            date = str(functions.request_time(0))
            vm_label = "Backup-VM-" + self.name + '-' + date
            temp_cmd = 'xe vm-copy vm=' + self.snap_label + ' sr-uuid=' + self.sruuid + ' new-name-label=' + vm_label
            vm_backup = functions.run_cmd(temp_cmd)
            self.vm_backup_name = vm_label
            self.vm_backup_uuid = vm_backup[:-1]
            functions.writing_log('create_vm', self.vm_backup_name)
        except:
            functions.writing_except_log('An error was occured while converting template in a VM')

    def export_vm(self):
        try:
            export_cmd = 'xe vm-export vm=' + self.vm_backup_uuid + ' filename=' + self.place_to_backup + self.vm_backup_name + '.xva'
            functions.run_cmd(export_cmd)
            functions.writing_log('export_vm', self.vm_backup_name)
        except:
            functions.writing_except_log('An error was occured while converting template in a VM')

    def delete_vm_vdi(self):
        try:
            delete_vm_cmd = 'xe vm-uninstall vm=' + self.vm_backup_name + ' force=true'
            functions.run_cmd(delete_vm_cmd)
        except:
            functions.writing_except_log('An error was occured while deleting backup VM')

    def delete_snapshot(self):
        try:
            delete_snap_cmd = 'xe snapshot-destroy snapshot-uuid=' + self.snap_uuid + ' force=true'
            functions.run_cmd(delete_snap_cmd)
        except:
            functions.writing_except_log('An error was occured while deleting backup Snapshot')


def backup_vm(vm_name, vm_uuid, sr_uuid):
    backup_dir = '/root/backups/backps_vms/' + vm_name
    vm = VMs(vm_name, vm_uuid, sr_uuid)
    functions.create_dir(backup_dir)
    vm.place_to_backup = backup_dir + '/'

    #CREATE A SNAPSHOT:
    vm.create_snapshot()

    #CONVERT SNAPSHOT ON A TEMPLATE:
    vm.convert_snap_template()

    #CONVERT TEMPLATE ON A VM:
    vm.convert_template_vm()

    #EXPORT VM:
    vm.export_vm()

    #DELETE SNAPSHOT AND VDI
    vm.delete_vm_vdi()
    vm.delete_snapshot()

    functions.remove_old_snaps(vm.place_to_backup)
import functions

class VMs(object):
	
	def __init__(self, name, uuid, sr_uuid):
		self.name = name
		self.uuid = uuid
		#-------------------------#
		#Info about vms snapshots, templates and vdi/vm backup
		#sr-uuid is the storage place where vdi is.
		#-------------------------#
		self.name_parameter = name
		self.snap_uuid = None
		self.snap_label = None
		self.sruuid = sr_uuid
		self.vm_backup_name = None
		self.vm_backup_uuid = None
		self.place_to_backup = None
	
	def create_snapshot(self):
		try:
			date = str(functions.request_time(0))
			snap_label = 'Snapshot' + self.name + date
			snap_cmd = 'xe vm-snapshot uuid=' + self.uuid + ' new-name-label=' + snap_label
			create_snapshot_uuid = functions.run_cmd(snap_cmd)
			self.snap_label = snap_label
			self.snap_uuid = create_snapshot_uuid[:-1]
			functions.writing_log('create_snap', self.snap_label)
			functions.writing_log('create_snap_uuid', self.snap_uuid)
		except:
			functions.writing_except_log('An error was occured while creating snapshot')

	def convert_snap_template(self):
		try:
			temp_cmd = 'xe template-param-set is-a-template=false uuid=' + self.snap_uuid
			convert = functions.run_cmd(temp_cmd)
			functions.writing_log('create_template')
		except:
			functions.writing_except_log('An error was occured while converting snapshot in a template')

	def convert_template_vm(self):
		try:
			date = str(functions.request_time(0))
			vm_label = "Backup-VM-" + self.name + '-' + date
			temp_cmd = 'xe vm-copy vm=' + self.snap_label + ' sr-uuid=' + self.sruuid + ' new-name-label=' + vm_label
			vm_backup = functions.run_cmd(temp_cmd)
			self.vm_backup_name = vm_label
			self.vm_backup_uuid = vm_backup[:-1]
			functions.writing_log('create_vm', self.vm_backup_name)
		except:
			functions.writing_except_log('An error was occured while converting template in a VM')
				
	def export_vm(self):
		try:
			export_cmd = 'xe vm-export vm=' + self.vm_backup_uuid + ' filename=' + self.place_to_backup + self.vm_backup_name + '.xva'
			functions.run_cmd(export_cmd)
			functions.writing_log('export_vm', self.vm_backup_name)
		except:
			functions.writing_except_log('An error was occured while converting template in a VM')
		
	def delete_vm_vdi(self):
		try:
			delete_vm_cmd = 'xe vm-uninstall vm=' + self.vm_backup_name + ' force=true'
			functions.run_cmd(delete_vm_cmd)
		except:
			functions.writing_except_log('An error was occured while deleting backup VM')
	
	def delete_snapshot(self):
		try:
			delete_snap_cmd = 'xe snapshot-destroy snapshot-uuid=' + self.snap_uuid + ' force=true'
			functions.run_cmd(delete_snap_cmd)
		except:
			functions.writing_except_log('An error was occured while deleting backup Snapshot')


def backup_vm(vm_name, vm_uuid, sr_uuid):
	
#	backup_dir = '/root/darwin_backups/backps_vms/' + vm_name
	backup_dir = '/root/mendel_backups/backps_vms/' + vm_name
	vm = VMs(vm_name, vm_uuid, sr_uuid)
	functions.create_dir(backup_dir)
	vm.place_to_backup = backup_dir + '/'
    
    #CREATE A SNAPSHOT:
	vm.create_snapshot()
        
    #CONVERT SNAPSHOT ON A TEMPLATE:
	vm.convert_snap_template()
        
    #CONVERT TEMPLATE ON A VM:
	vm.convert_template_vm()
        
    #EXPORT VM:
	vm.export_vm()
        
    #DELETE SNAPSHOT AND VDI
	vm.delete_vm_vdi()
	vm.delete_snapshot()
	
	functions.remove_old_snaps(vm.place_to_backup)