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VmBackup.py
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VmBackup.py
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#!/usr/bin/python
#
#NAUVmBackup/VmBackup.py
# V3.22 November 2017
#
#@NAUbackup - NAU/ITS Department:
# Douglas Pace
# David McArthur
# Duane Booher
# Tobias Kreidl
#
# With external contributions gratefully made by:
# @philippmk -
# @ilium007 -
# @HqWisen -
# @JHag6694 -
# @lancefogle - Lance Fogle
# Copyright (C) 2017 Northern Arizona University
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Title: NAUbackup/VmBackup - a XenServer vm-export & vdi-export Backup Script
# Package Contents: README.md, VmBackup.py (this file), example.cfg
# Version History
# - v3.22 2017/11/11 Add full VM metadata dump to XML file to replace VM
# metadata backup that could fail if special characters encountered
# - v3.21 2017/09/29 Fix "except socket.error" syntax to also work with older
# python version in XenServer 6.X
# - v3.2 2017/09/12 Fix wildcard handling and excludes for both VM and VDI
# cases, add email retries
# - v3.1 2016/11/26 Added regexp include/exclude syntax for selecting VMs,
# checking writability of backup directory, SMTP TLS email option,
# define DEFAULT_STATUS_LOG parameter
# - v3.0 2016/01/20 Added vdi-export for VMs with too many/large disks for
# vm-export
# - v2.1 2014/08/22 Added email status option
# - v2.0 2014/04/09 New VmBackup version (supersedes all previous NAUbackup
# versions)
# ** DO NOT RUN THIS SCRIPT UNLESS YOU ARE COMFORTABLE WITH THESE ACTIONS. **
# => To accomplish the vm backup this script uses the following xe commands
# vm-export: (a) vm-snapshot, (b) template-param-set, (c) vm-export, (d) vm-uninstall on vm-snapshot
# vdi-export: (a) vdi-snapshot, (b) vdi-param-set, (c) vdi-export, (d) vdi-destroy on vdi-snapshot
# See README for usage and installation documentation.
# See example.cfg for config file example usage.
# Usage w/ vm name for single vm backup, which runs vm-export by default:
# ./VmBackup.py <password> <vm-name>
# Usage w/ config file for multiple vm backups, where you can specify either vm-export or vdi-export:
# ./VmBackup.py <password> <config-file-path>
import sys, time, os, datetime, subprocess, re, shutil, XenAPI, smtplib, re, base64, socket
from email.MIMEText import MIMEText
from subprocess import PIPE
from subprocess import STDOUT
from os.path import join
############################# HARD CODED DEFAULTS
# modify these hard coded default values, only used if not specified in config file
DEFAULT_POOL_DB_BACKUP = 0
DEFAULT_MAX_BACKUPS = 4
DEFAULT_VDI_EXPORT_FORMAT = 'raw' # xe vdi-export options: 'raw' or 'vhd'
DEFAULT_BACKUP_DIR = '/snapshots/BACKUPS'
## DEFAULT_BACKUP_DIR = '\snapshots\BACKUPS' # alt for CIFS mounts
# note - some NAS file servers may fail with ':', so change to your desired format
BACKUP_DIR_PATTERN = '%s/backup-%04d-%02d-%02d-(%02d:%02d:%02d)'
DEFAULT_STATUS_LOG = '/snapshots/NAUbackup/status.log'
############################# OPTIONAL
# optional email may be triggered by configure next 3 parameters then find MAIL_ENABLE and uncommenting out the desired lines
MAIL_TO_ADDR = 'your-email@your-domain'
# note if MAIL_TO_ADDR has ipaddr then you may need to change the smtplib.SMTP() call
MAIL_FROM_ADDR = 'your-from-address@your-domain'
MAIL_SMTP_SERVER = 'your-mail-server'
config = {}
all_vms = []
expected_keys = ['pool_db_backup', 'max_backups', 'backup_dir', 'status_log', 'vdi_export_format', 'vm-export', 'vdi-export', 'exclude']
message = ''
xe_path = '/opt/xensource/bin'
def main(session):
success_cnt = 0
warning_cnt = 0
error_cnt = 0
#setting autoflush on (aka unbuffered)
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
server_name = os.uname()[1].split('.')[0]
if config_specified:
status_log_begin(server_name)
log('===========================')
log('VmBackup running on %s ...' % server_name)
log('===========================')
log('Check if backup directory %s is writable ...' % config['backup_dir'])
touchfile = os.path.join(config['backup_dir'], "00VMbackupWriteTest")
cmd = '/bin/touch "%s"' % touchfile
log(cmd)
res = run(cmd)
if not res:
log('ERROR failed to write to backup directory area - FATAL ERROR')
sys.exit(1)
else:
cmd = '/bin/rm -f "%s"' % touchfile
res = run(cmd)
log('Success: backup directory area is writable')
log('===========================')
df_snapshots('Space before backups: df -Th %s' % config['backup_dir'])
if int(config['pool_db_backup']):
log('*** begin backup_pool_metadata ***')
if not backup_pool_metadata(server_name):
error_cnt += 1
######################################################################
# Iterate through all vdi-export= in cfg
log('************ vdi-export= ***************')
for vm_parm in config['vdi-export']:
log('*** vdi-export begin %s' % vm_parm)
beginTime = datetime.datetime.now()
this_status = 'success'
# get values from vdi-export=
vm_name = get_vm_name(vm_parm)
vm_max_backups = get_vm_max_backups(vm_parm)
log('vdi-export - vm_name: %s max_backups: %s' % (vm_name, vm_max_backups))
if config_specified:
status_log_vdi_export_begin(server_name, '%s' % vm_name)
# verify vm_name exists with only one instance for this name
# returns error-message or vm_object if success
vm_object = verify_vm_name(vm_name)
if 'ERROR' in vm_object:
log('verify_vm_name: %s' % vm_object)
if config_specified:
status_log_vdi_export_end(server_name, 'ERROR verify_vm_name %s' % vm_name)
error_cnt += 1
# next vm
continue
vm_backup_dir = os.path.join(config['backup_dir'], vm_name)
# cleanup any old unsuccessful backups and create new full_backup_dir
full_backup_dir = process_backup_dir(vm_backup_dir)
# gather_vm_meta produces status: empty or warning-message
# and globals: vm_uuid, xvda_uuid, xvda_uuid
# => now only need: vm_uuid
# since all VM metadta go into an XML file
vm_meta_status = gather_vm_meta(vm_object, full_backup_dir)
if vm_meta_status != '':
log('WARNING gather_vm_meta: %s' % vm_meta_status)
this_status = 'warning'
# non-fatal - finsh processing for this vm
# vdi-export only uses xvda_uuid, xvda_uuid
if xvda_uuid == '':
log('ERROR gather_vm_meta has no xvda-uuid')
if config_specified:
status_log_vdi_export_end(server_name, 'ERROR xvda-uuid not found %s' % vm_name)
error_cnt += 1
# next vm
continue
if xvda_name_label == '':
log('ERROR gather_vm_meta has no xvda-name-label')
if config_specified:
status_log_vdi_export_end(server_name, 'ERROR xvda-name-label not found %s' % vm_name)
error_cnt += 1
# next vm
continue
# -----------------------------------------
# --- begin vdi-export command sequence ---
log ('*** vdi-export begin xe command sequence')
# is vm currently running?
cmd = '%s/xe vm-list name-label="%s" params=power-state | /bin/grep running' % (xe_path, vm_name)
if run_log_out_wait_rc(cmd) == 0:
log ('vm is running')
else:
log ('vm is NOT running')
# list the vdi we will backup
cmd = '%s/xe vdi-list uuid=%s' % (xe_path, xvda_uuid)
log('1.cmd: %s' % cmd)
if run_log_out_wait_rc(cmd) != 0:
log('ERROR %s' % cmd)
if config_specified:
status_log_vdi_export_end(server_name, 'VDI-LIST-FAIL %s' % vm_name)
error_cnt += 1
# next vm
continue
# check for old vdi-snapshot for this xvda
snap_vdi_name_label = 'SNAP_%s_%s' % (vm_name, xvda_name_label)
# replace all spaces with '-'
snap_vdi_name_label = re.sub(r' ', r'-', snap_vdi_name_label)
log ('check for prev-vdi-snapshot: %s' % snap_vdi_name_label)
cmd = "%s/xe vdi-list name-label='%s' params=uuid | /bin/awk -F': ' '{print $2}' | /bin/grep '-'" % (xe_path, snap_vdi_name_label)
old_snap_vdi_uuid = run_get_lastline(cmd)
if old_snap_vdi_uuid != '':
log ('cleanup old-snap-vdi-uuid: %s' % old_snap_vdi_uuid)
# vdi-destroy old vdi-snapshot
cmd = '%s/xe vdi-destroy uuid=%s' % (xe_path, old_snap_vdi_uuid)
log('cmd: %s' % cmd)
if run_log_out_wait_rc(cmd) != 0:
log('WARNING %s' % cmd)
this_status = 'warning'
# non-fatal - finsh processing for this vm
# take a vdi-snapshot of this vm
cmd = '%s/xe vdi-snapshot uuid=%s' % (xe_path, xvda_uuid)
log('2.cmd: %s' % cmd)
snap_vdi_uuid = run_get_lastline(cmd)
log ('snap-uuid: %s' % snap_vdi_uuid)
if snap_vdi_uuid == '':
log('ERROR %s' % cmd)
if config_specified:
status_log_vdi_export_end(server_name, 'VDI-SNAPSHOT-FAIL %s' % vm_name)
error_cnt += 1
# next vm
continue
# change vdi-snapshot to unique name-label for easy id and cleanup
cmd = '%s/xe vdi-param-set uuid=%s name-label="%s"' % (xe_path, snap_vdi_uuid, snap_vdi_name_label)
log('3.cmd: %s' % cmd)
if run_log_out_wait_rc(cmd) != 0:
log('ERROR %s' % cmd)
if config_specified:
status_log_vdi_export_end(server_name, 'VDI-PARAM-SET-FAIL %s' % vm_name)
error_cnt += 1
# next vm
continue
# actual-backup: vdi-export vdi-snapshot
cmd = '%s/xe vdi-export format=%s uuid=%s' % (xe_path, config['vdi_export_format'], snap_vdi_uuid)
full_path_backup_file = os.path.join(full_backup_dir, vm_name + '.%s' % config['vdi_export_format'])
cmd = '%s filename="%s"' % (cmd, full_path_backup_file)
log('4.cmd: %s' % cmd)
if run_log_out_wait_rc(cmd) == 0:
log('vdi-export success')
else:
log('ERROR %s' % cmd)
if config_specified:
status_log_vdi_export_end(server_name, 'VDI-EXPORT-FAIL %s' % vm_name)
error_cnt += 1
# next vm
continue
# cleanup: vdi-destroy vdi-snapshot
cmd = '%s/xe vdi-destroy uuid=%s' % (xe_path, snap_vdi_uuid)
log('5.cmd: %s' % cmd)
if run_log_out_wait_rc(cmd) != 0:
log('WARNING %s' % cmd)
this_status = 'warning'
# non-fatal - finsh processing for this vm
log ('*** vdi-export end')
# --- end vdi-export command sequence ---
# ---------------------------------------
elapseTime = datetime.datetime.now() - beginTime
backup_file_size = os.path.getsize(full_path_backup_file) / (1024 * 1024 * 1024)
final_cleanup( full_path_backup_file, backup_file_size, full_backup_dir, vm_backup_dir, vm_max_backups)
if not check_all_backups_success(vm_backup_dir):
log('WARNING cleanup needed - not all backup history is successful')
this_status = 'warning'
if (this_status == 'success'):
success_cnt += 1
log('VmBackup vdi-export %s - ***Success*** t:%s' % (vm_name, str(elapseTime.seconds/60)))
if config_specified:
status_log_vdi_export_end(server_name, 'SUCCESS %s,elapse:%s size:%sG' % (vm_name, str(elapseTime.seconds/60), backup_file_size))
elif (this_status == 'warning'):
warning_cnt += 1
log('VmBackup vdi-export %s - ***WARNING*** t:%s' % (vm_name, str(elapseTime.seconds/60)))
if config_specified:
status_log_vdi_export_end(server_name, 'WARNING %s,elapse:%s size:%sG' % (vm_name, str(elapseTime.seconds/60), backup_file_size))
else:
# this should never occur since all errors do a continue on to the next vm_name
error_cnt += 1
log('VmBackup vdi-export %s - +++ERROR-INTERNAL+++ t:%s' % (vm_name, str(elapseTime.seconds/60)))
if config_specified:
status_log_vdi_export_end(server_name, 'ERROR-INTERNAL %s,elapse:%s size:%sG' % (vm_name, str(elapseTime.seconds/60), backup_file_size))
# end of for vm_parm in config['vdi-export']:
######################################################################
######################################################################
# Iterate through all vm-export= in cfg
log('************ vm-export= ***************')
for vm_parm in config['vm-export']:
log('*** vm-export begin %s' % vm_parm)
beginTime = datetime.datetime.now()
this_status = 'success'
# get values from vdi-export=
vm_name = get_vm_name(vm_parm)
vm_max_backups = get_vm_max_backups(vm_parm)
log('vm-export - vm_name: %s max_backups: %s' % (vm_name, vm_max_backups))
if config_specified:
status_log_vm_export_begin(server_name, '%s' % vm_name)
# verify vm_name exists with only one instance for this name
# returns error-message or vm_object if success
vm_object = verify_vm_name(vm_name)
if 'ERROR' in vm_object:
log('verify_vm_name: %s' % vm_object)
if config_specified:
status_log_vm_export_end(server_name, 'ERROR verify_vm_name %s' % vm_name)
error_cnt += 1
# next vm
continue
vm_backup_dir = os.path.join(config['backup_dir'], vm_name)
# cleanup any old unsuccessful backups and create new full_backup_dir
full_backup_dir = process_backup_dir(vm_backup_dir)
# gather_vm_meta produces status: empty or warning-message
# and globals: vm_uuid, xvda_uuid, xvda_uuid
vm_meta_status = gather_vm_meta(vm_object, full_backup_dir)
if vm_meta_status != '':
log('WARNING gather_vm_meta: %s' % vm_meta_status)
this_status = 'warning'
# non-fatal - finsh processing for this vm
# vm-export only uses vm_uuid
if vm_uuid == '':
log('ERROR gather_vm_meta has no vm-uuid')
if config_specified:
status_log_vm_export_end(server_name, 'ERROR vm-uuid not found %s' % vm_name)
error_cnt += 1
# next vm
continue
# ----------------------------------------
# --- begin vm-export command sequence ---
log ('*** vm-export begin xe command sequence')
# is vm currently running?
cmd = '%s/xe vm-list name-label="%s" params=power-state | /bin/grep running' % (xe_path, vm_name)
if run_log_out_wait_rc(cmd) == 0:
log ('vm is running')
else:
log ('vm is NOT running')
# check for old vm-snapshot for this vm
snap_name = 'RESTORE_%s' % vm_name
log ('check for prev-vm-snapshot: %s' % snap_name)
cmd = "%s/xe vm-list name-label='%s' params=uuid | /bin/awk -F': ' '{print $2}' | /bin/grep '-'" % (xe_path, snap_name)
old_snap_vm_uuid = run_get_lastline(cmd)
if old_snap_vm_uuid != '':
log ('cleanup old-snap-vm-uuid: %s' % old_snap_vm_uuid)
# vm-uninstall old vm-snapshot
cmd = '%s/xe vm-uninstall uuid=%s force=true' % (xe_path, old_snap_vm_uuid)
log('cmd: %s' % cmd)
if run_log_out_wait_rc(cmd) != 0:
log('WARNING-ERROR %s' % cmd)
this_status = 'warning'
if config_specified:
status_log_vm_export_end(server_name, 'VM-UNINSTALL-FAIL-1 %s' % vm_name)
# non-fatal - finsh processing for this vm
# take a vm-snapshot of this vm
cmd = '%s/xe vm-snapshot vm=%s new-name-label="%s"' % (xe_path, vm_uuid, snap_name)
log('1.cmd: %s' % cmd)
snap_vm_uuid = run_get_lastline(cmd)
log ('snap-uuid: %s' % snap_vm_uuid)
if snap_vm_uuid == '':
log('ERROR %s' % cmd)
if config_specified:
status_log_vm_export_end(server_name, 'SNAPSHOT-FAIL %s' % vm_name)
error_cnt += 1
# next vm
continue
# change vm-snapshot so that it can be referenced by vm-export
cmd = '%s/xe template-param-set is-a-template=false ha-always-run=false uuid=%s' % (xe_path, snap_vm_uuid)
log('2.cmd: %s' % cmd)
if run_log_out_wait_rc(cmd) != 0:
log('ERROR %s' % cmd)
if config_specified:
status_log_vm_export_end(server_name, 'TEMPLATE-PARAM-SET-FAIL %s' % vm_name)
error_cnt += 1
# next vm
continue
# vm-export vm-snapshot
cmd = '%s/xe vm-export uuid=%s' % (xe_path, snap_vm_uuid)
if compress:
full_path_backup_file = os.path.join(full_backup_dir, vm_name + '.xva.gz')
cmd = '%s filename="%s" compress=true' % (cmd, full_path_backup_file)
else:
full_path_backup_file = os.path.join(full_backup_dir, vm_name + '.xva')
cmd = '%s filename="%s"' % (cmd, full_path_backup_file)
log('3.cmd: %s' % cmd)
if run_log_out_wait_rc(cmd) == 0:
log('vm-export success')
else:
log('ERROR %s' % cmd)
if config_specified:
status_log_vm_export_end(server_name, 'VM-EXPORT-FAIL %s' % vm_name)
error_cnt += 1
# next vm
continue
# vm-uninstall vm-snapshot
cmd = '%s/xe vm-uninstall uuid=%s force=true' % (xe_path, snap_vm_uuid)
log('4.cmd: %s' % cmd)
if run_log_out_wait_rc(cmd) != 0:
log('WARNING %s' % cmd)
this_status = 'warning'
# non-fatal - finsh processing for this vm
log ('*** vm-export end')
# --- end vm-export command sequence ---
# ----------------------------------------
elapseTime = datetime.datetime.now() - beginTime
backup_file_size = os.path.getsize(full_path_backup_file) / (1024 * 1024 * 1024)
final_cleanup( full_path_backup_file, backup_file_size, full_backup_dir, vm_backup_dir, vm_max_backups)
if not check_all_backups_success(vm_backup_dir):
log('WARNING cleanup needed - not all backup history is successful')
this_status = 'warning'
if (this_status == 'success'):
success_cnt += 1
log('VmBackup vm-export %s - ***Success*** t:%s' % (vm_name, str(elapseTime.seconds/60)))
if config_specified:
status_log_vm_export_end(server_name, 'SUCCESS %s,elapse:%s size:%sG' % (vm_name, str(elapseTime.seconds/60), backup_file_size))
elif (this_status == 'warning'):
warning_cnt += 1
log('VmBackup vm-export %s - ***WARNING*** t:%s' % (vm_name, str(elapseTime.seconds/60)))
if config_specified:
status_log_vm_export_end(server_name, 'WARNING %s,elapse:%s size:%sG' % (vm_name, str(elapseTime.seconds/60), backup_file_size))
else:
# this should never occur since all errors do a continue on to the next vm_name
error_cnt += 1
log('VmBackup vm-export %s - +++ERROR-INTERNAL+++ t:%s' % (vm_name, str(elapseTime.seconds/60)))
if config_specified:
status_log_vm_export_end(server_name, 'ERROR-INTERNAL %s,elapse:%s size:%sG' % (vm_name, str(elapseTime.seconds/60), backup_file_size))
# end of for vm_parm in config['vm-export']:
######################################################################
log('===========================')
df_snapshots('Space status: df -Th %s' % config['backup_dir'])
# gather a final VmBackup.py status
summary = 'S:%s W:%s E:%s' % (success_cnt, warning_cnt, error_cnt)
status_log = config['status_log']
if (error_cnt > 0):
if config_specified:
status_log_end(server_name, 'ERROR,%s' % summary)
# MAIL_ENABLE: optional email may be enabled by uncommenting out the next two lines
#send_email(MAIL_TO_ADDR, 'ERROR VmBackup.py', status_log)
#open('%s' % status_log, 'w').close() # trunc status log after email
log('VmBackup ended - **ERRORS DETECTED** - %s' % summary)
elif (warning_cnt > 0):
if config_specified:
status_log_end(server_name, 'WARNING,%s' % summary)
# MAIL_ENABLE: optional email may be enabled by uncommenting out the next two lines
#send_email(MAIL_TO_ADDR,'WARNING VmBackup.py', status_log)
#open('%s' % status_log, 'w').close() # trunc status log after email
log('VmBackup ended - **WARNING(s)** - %s' % summary)
else:
if config_specified:
status_log_end(server_name, 'SUCCESS,%s' % summary)
# MAIL_ENABLE: optional email may be enabled by uncommenting out the next two lines
#send_email(MAIL_TO_ADDR, 'Success VmBackup.py', status_log)
#open('%s' % status_log, 'w').close() # trunc status log after email
log('VmBackup ended - Success - %s' % summary)
# done with main()
######################################################################
def isInt(s):
try:
int(s)
return True
except ValueError:
return False
def get_vm_max_backups(vm_parm):
# get max_backups from optional vm-export=VM-NAME:MAX-BACKUP override
# NOTE - if not present then return config['max_backups']
if vm_parm.find(':') == -1:
return int(config['max_backups'])
else:
(vm_name,tmp_max_backups) = vm_parm.split(':')
tmp_max_backups = int(tmp_max_backups)
if (tmp_max_backups > 0):
return tmp_max_backups
else:
return int(config['max_backups'])
def is_vm_backups_valid(vm_parm):
if vm_parm.find(':') == -1:
# valid since we will use config['max_backups']
return True
else:
# a value has been specified - is it valid?
(vm_name,tmp_max_backups) = vm_parm.split(':')
if isInt(tmp_max_backups):
return tmp_max_backups > 0
else:
return False
def get_vm_backups(vm_parm):
# get max_backups from optional vm-export=VM-NAME:MAX-BACKUP override
# NOTE - if not present then return empty string '' else return whatever specified after ':'
if vm_parm.find(':') == -1:
return ''
else:
(vm_name,tmp_max_backups) = vm_parm.split(':')
return tmp_max_backups
def get_vm_name(vm_parm):
# get vm_name from optional vm-export=VM-NAME:MAX-BACKUP override
if (vm_parm.find(':') == -1):
return vm_parm
else:
(tmp_vm_name,tmp_max_backups) = vm_parm.split(':')
return tmp_vm_name
def verify_vm_name(tmp_vm_name):
vm = session.xenapi.VM.get_by_name_label(tmp_vm_name)
if (len(vm) > 1):
return 'ERROR more than one vm with the name %s' % tmp_vm_name
elif (len(vm) == 0):
return 'ERROR no machines found with the name %s' % tmp_vm_name
return vm[0]
def gather_vm_meta(vm_object, tmp_full_backup_dir):
global vm_uuid
# global xvda_uuid
# global xvda_name_label
vm_uuid = ''
# xvda_uuid = ''
# xvda_name_label = ''
tmp_error = '';
vm_record = session.xenapi.VM.get_record(vm_object)
vm_uuid = vm_record['uuid']
log ('Exporting VM metadata XML info')
cmd = '%s/xe vm-export metadata=true uuid=%s filename= | tar -xOf - | /usr/bin/xmllint -format - > "%s/vm-metadata.xml"' % (xe_path, vm_uuid, tmp_full_backup_dir)
if run_log_out_wait_rc(cmd) != 0:
log('WARNING %s' % cmd)
this_status = 'warning'
# non-fatal - finish processing for this vm
log ('*** vm-export metadata end')
### The backup of the VM metadata portion in the code section below is
### deprecated since some entries such as name_label can contain
### non-standard characters that result in errors. All metadata are now saved
### using the code above. The additional VIF, Disk, VDI and VBD outputs
### are retained for now.
# # Backup vm meta data
# log ('Writing vm config file.')
# vm_out = open ('%s/vm.cfg' % tmp_full_backup_dir, 'w')
# vm_out.write('name_label=%s\n' % vm_record['name_label'])
# vm_out.write('name_description=%s\n' % vm_record['name_description'])
# vm_out.write('memory_dynamic_max=%s\n' % vm_record['memory_dynamic_max'])
# vm_out.write('VCPUs_max=%s\n' % vm_record['VCPUs_max'])
# vm_out.write('VCPUs_at_startup=%s\n' % vm_record['VCPUs_at_startup'])
# # notice some keys are not always available
# try:
# # notice list within list : vm_record['other_config']['base_template_name']
# vm_out.write('base_template_name=%s\n' % vm_record['other_config']['base_template_name'])
# except KeyError:
# # ignore
# pass
# vm_out.write('os_version=%s\n' % get_os_version(vm_record['uuid']))
# # get orig uuid for special metadata disaster recovery
# vm_out.write('orig_uuid=%s\n' % vm_record['uuid'])
# vm_uuid = vm_record['uuid']
# vm_out.close()
#
# Write metadata files for vdis and vbds. These end up inside of a DISK- directory.
log ('Writing disk info')
vbd_cnt = 0
for vbd in vm_record['VBDs']:
log('vbd: %s' % vbd)
vbd_record = session.xenapi.VBD.get_record(vbd)
# For each vbd, find out if its a disk
if vbd_record['type'].lower() != 'disk':
continue
vbd_record_device = vbd_record['device']
if vbd_record_device == '':
# not normal - flag as warning.
# this seems to occur on some vms that have not been started in a long while,
# after starting the vm this blank condition seems to go away.
tmp_error += 'empty vbd_record[device] on vbd: %s ' % vbd
# if device is not available then use counter as a alternate reference
vbd_cnt += 1
vbd_record_device = vbd_cnt
vdi_record = session.xenapi.VDI.get_record(vbd_record['VDI'])
log('disk: %s - begin' % vdi_record['name_label'])
# now write out the vbd info.
device_path = '%s/DISK-%s' % (tmp_full_backup_dir, vbd_record_device)
os.mkdir(device_path)
vbd_out = open('%s/vbd.cfg' % device_path, 'w')
vbd_out.write('userdevice=%s\n' % vbd_record['userdevice'])
vbd_out.write('bootable=%s\n' % vbd_record['bootable'])
vbd_out.write('mode=%s\n' % vbd_record['mode'])
vbd_out.write('type=%s\n' % vbd_record['type'])
vbd_out.write('unpluggable=%s\n' % vbd_record['unpluggable'])
vbd_out.write('empty=%s\n' % vbd_record['empty'])
# get orig uuid for special metadata disaster recovery
vbd_out.write('orig_uuid=%s\n' % vbd_record['uuid'])
# other_config and qos stuff is not backed up
vbd_out.close()
# now write out the vdi info.
vdi_out = open('%s/vdi.cfg' % device_path, 'w')
vdi_out.write('name_label=%s\n' % vdi_record['name_label'])
vdi_out.write('name_description=%s\n' % vdi_record['name_description'])
vdi_out.write('virtual_size=%s\n' % vdi_record['virtual_size'])
vdi_out.write('type=%s\n' % vdi_record['type'])
vdi_out.write('sharable=%s\n' % vdi_record['sharable'])
vdi_out.write('read_only=%s\n' % vdi_record['read_only'])
# get orig uuid for special metadata disaster recovery
vdi_out.write('orig_uuid=%s\n' % vdi_record['uuid'])
sr_uuid = session.xenapi.SR.get_record(vdi_record['SR'])['uuid']
vdi_out.write('orig_sr_uuid=%s\n' % sr_uuid)
# other_config and qos stuff is not backed up
vdi_out.close()
if vbd_record_device == 'xvda':
xvda_uuid = vdi_record['uuid']
xvda_name_label = vdi_record['name_label']
# Write metadata files for vifs. These are put in VIFs directory
log ('Writing VIF info')
for vif in vm_record['VIFs']:
vif_record = session.xenapi.VIF.get_record(vif)
log ('Writing VIF: %s' % vif_record['device'])
device_path = '%s/VIFs' % tmp_full_backup_dir
if (not os.path.exists(device_path)):
os.mkdir(device_path)
vif_out = open('%s/vif-%s.cfg' % (device_path, vif_record['device']), 'w')
vif_out.write('device=%s\n' % vif_record['device'])
network_name = session.xenapi.network.get_record(vif_record['network'])['name_label']
vif_out.write('network_name_label=%s\n' % network_name)
vif_out.write('MTU=%s\n' % vif_record['MTU'])
vif_out.write('MAC=%s\n' % vif_record['MAC'])
vif_out.write('other_config=%s\n' % vif_record['other_config'])
vif_out.write('orig_uuid=%s\n' % vif_record['uuid'])
vif_out.close()
return tmp_error
def final_cleanup( tmp_full_path_backup_file, tmp_backup_file_size, tmp_full_backup_dir, tmp_vm_backup_dir, tmp_vm_max_backups):
# mark this a successful backup, note: this will 'touch' a file named 'success'
# if backup size is greater than 60G, then nfs server side compression occurs
if tmp_backup_file_size > 60:
log('*** LARGE FILE > 60G: %s : %sG' % (tmp_full_path_backup_file, tmp_backup_file_size))
# forced compression via background gzip (requires nfs server side script)
open('%s/success_compress' % tmp_full_backup_dir, 'w').close()
log('*** success_compress: %s : %sG' % (tmp_full_path_backup_file, tmp_backup_file_size))
else:
open('%s/success' % tmp_full_backup_dir, 'w').close()
log('*** success: %s : %sG' % (tmp_full_path_backup_file, tmp_backup_file_size))
# Remove oldest if more than tmp_vm_max_backups
dir_to_remove = get_dir_to_remove(tmp_vm_backup_dir, tmp_vm_max_backups)
while (dir_to_remove):
log ('Deleting oldest backup %s/%s ' % (tmp_vm_backup_dir, dir_to_remove))
# remove dir - if throw exception then stop processing
shutil.rmtree(tmp_vm_backup_dir + '/' + dir_to_remove)
dir_to_remove = get_dir_to_remove(tmp_vm_backup_dir, tmp_vm_max_backups)
# cleanup old unsuccessful backup and create new full_backup_dir
def process_backup_dir(tmp_vm_backup_dir):
if (not os.path.exists(tmp_vm_backup_dir)):
# Create new dir - if throw exception then stop processing
os.mkdir(tmp_vm_backup_dir)
# if last backup was not successful, then delete it
dir_not_success = get_last_backup_dir_that_failed(tmp_vm_backup_dir)
if (dir_not_success):
#if (not os.path.exists(tmp_vm_backup_dir + '/' + dir_not_success + '/fail')):
log ('Delete last **unsuccessful** backup %s/%s ' % (tmp_vm_backup_dir, dir_not_success))
# remove last unseccessful backup - if throw exception then stop processing
shutil.rmtree(tmp_vm_backup_dir + '/' + dir_not_success)
# create new backup dir
return create_full_backup_dir(tmp_vm_backup_dir)
# Setup full backup dir structure
def create_full_backup_dir(vm_base_path):
# Check that directory exists
if not os.path.exists(vm_base_path):
# Create new dir - if throw exception then stop processing
os.mkdir(vm_base_path)
date = datetime.datetime.today()
tmp_backup_dir = BACKUP_DIR_PATTERN \
% (vm_base_path, date.year, date.month, date.day, date.hour, date.minute, date.second)
log('new backup_dir: %s' % tmp_backup_dir)
if not os.path.exists(tmp_backup_dir):
# Create new dir - if throw exception then stop processing
os.mkdir(tmp_backup_dir)
return tmp_backup_dir
# Setup meta dir structure
def get_meta_path(base_path):
# Check that directory exists
if not os.path.exists(base_path):
# Create new dir
try:
os.mkdir(base_path)
except OSError, error:
log('ERROR creating directory %s : %s' % (base_path, error.as_string()))
return False
date = datetime.datetime.today()
backup_path = '%s/pool_db_%04d%02d%02d-%02d%02d%02d.dump' \
% (base_path, date.year, date.month, date.day, date.hour, date.minute, date.second)
return backup_path
def get_dir_to_remove(path, numbackups):
# Find oldest backup and select for deletion
dirs = os.listdir(path)
dirs.sort()
if (len(dirs) > numbackups and len(dirs) > 1):
return dirs[0]
else:
return False
def get_last_backup_dir_that_failed(path):
# if the last backup dir was not success, then return that backup dir
dirs = os.listdir(path)
if (len(dirs) <= 1):
return False
dirs.sort()
# note: dirs[-1] is the last entry
if (not os.path.exists(path + '/' + dirs[-1] + '/success')) and \
(not os.path.exists(path + '/' + dirs[-1] + '/success_restore')) and \
(not os.path.exists(path + '/' + dirs[-1] + '/success_compress' )) and \
(not os.path.exists(path + '/' + dirs[-1] + '/success_compressing' )):
return dirs[-1]
else:
return False
def check_all_backups_success(path):
# expect at least one backup dir, and all should be successful
dirs = os.listdir(path)
if (len(dirs) == 0):
return False
for dir in dirs:
if (not os.path.exists(path + '/' + dir + '/success' )) and \
(not os.path.exists(path + '/' + dir + '/success_restore' )) and \
(not os.path.exists(path + '/' + dir + '/success_compress' )) and \
(not os.path.exists(path + '/' + dir + '/success_compressing' )):
log("WARNING: directory not successful - %s" % dir)
return False
return True
def backup_pool_metadata(svr_name):
# xe-backup-metadata can only run on master
if not is_xe_master():
log('** ignore: NOT master')
return True
metadata_base = os.path.join(config['backup_dir'], 'METADATA_' + svr_name)
metadata_file = get_meta_path(metadata_base)
cmd = "%s/xe pool-dump-database file-name='%s'" % (xe_path, metadata_file)
log(cmd)
if run_log_out_wait_rc(cmd) != 0:
log('ERROR failed to backup pool metadata')
return False
return True
# some run notes with xe return code and output examples
# xe vm-lisX -> error .returncode=1 w/ error msg
# xe vm-list name-label=BAD-vm-name -> success .returncode=0 with no output
# xe pool-dump-database file-name=<dup-file-already-exists>
# -> error .returncode=1 w/ error msg
def run_log_out_wait_rc(cmd, log_w_timestamp=True):
child = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True)
line = child.stdout.readline()
while line:
log(line.rstrip("\n"), log_w_timestamp)
line = child.stdout.readline()
return child.wait()
def run_get_lastline(cmd):
# exec cmd - expect 1 line output from cmd
# return last line
f = os.popen(cmd)
resp = ''
for line in f.readlines():
resp = line.rstrip("\n")
return resp
def get_os_version(uuid):
cmd = "%s/xe vm-list uuid='%s' params=os-version | /bin/grep 'os-version' | /bin/awk -F'name: ' '{print $2}' | /bin/awk -F'|' '{print $1}' | /bin/awk -F';' '{print $1}'" % (xe_path, uuid)
return run_get_lastline(cmd)
def df_snapshots(log_msg):
log(log_msg)
f = os.popen('df -Th %s' % config['backup_dir'])
for line in f.readlines():
line = line.rstrip("\n")
log(line)
def send_email(to, subject, body_fname):
smtp_send_retries = 3
smtp_send_attempt = 0
message = open('%s' % body_fname, 'r').read()
msg = MIMEText(message)
msg['subject'] = subject
msg['From'] = MAIL_FROM_ADDR
msg['To'] = to
while smtp_send_attempt < smtp_send_retries:
smtp_send_attempt += 1
if smtp_send_attempt > smtp_send_retries:
print("Send email count limit exceeded")
sys.exit(1)
try:
# note if using an ipaddress in MAIL_SMTP_SERVER,
# then may require smtplib.SMTP(MAIL_SMTP_SERVER, local_hostname="localhost")
## Optional use of SMTP user authentication via TLS
##
## If so, comment out the next line of code and uncomment/configure
## the next block of code. Note that different SMTP servers will require
## different username options, such as the plain username, the
## domain\username, etc. The "From" email address entry must be a valid
## email address that can be authenticated and should be configured
## in the MAIL_FROM_ADDR variable along with MAIL_SMTP_SERVER early in
## the script. Note that some SMTP servers might use port 465 instead of 587.
s = smtplib.SMTP(MAIL_SMTP_SERVER)
#### start block
#username = 'MyLogin'
#password = 'MyPassword'
#s = smtplib.SMTP(MAIL_SMTP_SERVER, 587)
#s.ehlo()
#s.starttls()
#s.login(username, password)
#### end block
s.sendmail(MAIL_FROM_ADDR, to.split(','), msg.as_string())
s.quit()
break
except socket.error, e:
print("Exception: socket.error - %s" %e)
time.sleep(5)
except smtplib.SMTPException, e:
print("Exception: SMTPException - %s" %e.message)
time.sleep(5)
def is_xe_master():
# test to see if we are running on xe master
cmd = '%s/xe pool-list params=master --minimal' % xe_path
master_uuid = run_get_lastline(cmd)
hostname = os.uname()[1]
cmd = '%s/xe host-list name-label=%s --minimal' % (xe_path, hostname)
host_uuid = run_get_lastline(cmd)
if host_uuid == master_uuid:
return True
return False
def is_config_valid():
if not isInt(config['pool_db_backup']):
print 'ERROR: config pool_db_backup non-numeric -> %s' % config['pool_db_backup']
return False
if int(config['pool_db_backup']) != 0 and int(config['pool_db_backup']) != 1:
print 'ERROR: config pool_db_backup out of range -> %s' % config['pool_db_backup']
return False
if not isInt(config['max_backups']):
print 'ERROR: config max_backups non-numeric -> %s' % config['max_backups']
return False
if int(config['max_backups']) < 1:
print 'ERROR: config max_backups out of range -> %s' % config['max_backups']
return False
if config['vdi_export_format'] != 'raw' and config['vdi_export_format'] != 'vhd':
print 'ERROR: config vdi_export_format invalid -> %s' % config['vdi_export_format']
return False
if not os.path.exists(config['backup_dir']):
print 'ERROR: config backup_dir does not exist -> %s' % config['backup_dir']
return False
tmp_return = True
for vm_parm in config['vdi-export']:
if not is_vm_backups_valid(vm_parm):
print 'ERROR: vm_max_backup is invalid - %s' % vm_parm
tmp_return = False
for vm_parm in config['vm-export']:
if not is_vm_backups_valid(vm_parm):
print 'ERROR: vm_max_backup is invalid - %s' % vm_parm
tmp_return = False
return tmp_return
def config_load(path):
return_value = True
config_file = open(path, 'r')
for line in config_file:
if (not line.startswith('#') and len(line.strip()) > 0):
(key,value) = line.strip().split('=')
key = key.strip()
value = value.strip()
# check for valid keys
if not key in expected_keys:
if ignore_extra_keys:
log('ignoring config key: %s' % key)
else:
print '***ERROR unexpected config key: %s' % key
return_value = False
if key == 'exclude':
save_to_config_exclude( key, value)
elif key in ['vm-export','vdi-export']:
save_to_config_export( key, value)
else:
# all other key's
save_to_config_values( key, value)
return return_value
def save_to_config_exclude( key, vm_name):
# save key/value in config[]
# expected-key: exclude
# expected-value: vmname (with or w/o regex)
global warning_match
global error_regex
found_match = False
# Fail fast if exclude param given but empty to prevent from exluding all VMs
if vm_name == "":
return
if not isNormalVmName(vm_name) and not isRegExValid( vm_name):
log("***ERROR - invalid regex: %s=%s" % (key, vm_name))
error_regex = True
return
for vm in all_vms:
if ((isNormalVmName(vm_name) and vm_name == vm) or
(not isNormalVmName(vm_name) and re.match(vm_name, vm))):
found_match = True
config[key].append(vm)
if not found_match:
log("***WARNING - vm not found: %s=%s" % (key, vm_name))
warning_match = True
else:
for vm in config[key]:
all_vms.remove(vm)
def save_to_config_export( key, value):
# save key/value in config[]