Migration helper script

Signed-off-by: Kristián Feldsam <feldsam@gmail.com>

.gitignore

 *.pyc
 /config.py
+/configmigrate.py

configmigrate.sample.py

+# OpenNebula XML-RPC API connection details
+ONE = {
+    'address': 'https://opennebula:2633/RPC2',
+    'username': 'user',
+    'password': 'pass'
+}

migrate.py

+#!/usr/bin/env python
+
+import argparse
+import subprocess
+import time
+import sys
+import os
+
+import config
+import configmigrate
+import pyone
+
+base_path = os.path.abspath(os.path.dirname(sys.argv[0]))
+
+# ----------------------------
+# Define parser
+# ----------------------------
+parser = argparse.ArgumentParser(description='OpenNebula Migration Tool')
+
+parser.add_argument('-i', '--image', help='Image ID in old cloud to migrate', type=int, required=True)
+
+# -------------------------------------
+# Parse args and proceed with execution
+# -------------------------------------
+args = parser.parse_args()
+
+
+imageTypes = {0: 'OS', 1: 'CDROM', 2: 'DATABLOCK'}
+imagePersistent = {0: 'NO', 1: 'YES'}
+
+# -----------------------
+# Connect to OpenNebula
+# -----------------------
+oneOld = pyone.OneServer(configmigrate.ONE['address'], session='%s:%s' % (configmigrate.ONE['username'], configmigrate.ONE['password']))
+oneNew = pyone.OneServer(config.ONE['address'], session='%s:%s' % (config.ONE['username'], config.ONE['password']))
+
+# find requested image
+image = oneOld.image.info(args.image)
+
+name = image.NAME.strip('_')
+source = image.SOURCE
+
+# allocate new image in datastore 101
+template = 'NAME=%s TYPE=%s SIZE=%d PERSISTENT=%s DEV_PREFIX=sd DRIVER=raw' % (name, imageTypes[image.TYPE], image.SIZE, imagePersistent[image.PERSISTENT])
+print template
+id = oneNew.image.allocate(template, 101)
+
+# get new image info
+newSource = None
+while not newSource:
+    newImage = oneNew.image.info(id)
+    newSource = newImage.SOURCE
+    time.sleep(1)
+
+print newSource
+
+# copy image
+print subprocess.check_output('nc -l -p 5000 | pv -pterab | dd of=/var/data/tmp/%s & ssh oneadmin@node1.feldhost.cz \'dd if=%s | nc -w 30 infra.feldcloud.net 5000\' ' % (name, source), shell=True)
+
+# check img
+print subprocess.check_output('qemu-img check /var/data/tmp/%s' % (name), shell=True)
+
+# connect and login to 3PAR
+from drivers import _3par
+_3par.login()
+
+# get vv name and wwn
+vvname, wwn = _3par.vv_name_wwn(newSource)
+
+# export volume to backup server
+print 'Exporting volume %s to backup server...' % vvname
+lun_no = _3par.export_vv(vvname, config.EXPORT_HOST)
+
+# discover volume
+print 'Volume is exported as LUN %d with WWN %s on %s. Discovering LUN...' % (lun_no, wwn, config.EXPORT_HOST)
+subprocess.check_call('%s/sh/discover_lun.sh %d %s' % (base_path, lun_no, wwn), shell=True)
+
+# covert qcow2 to raw directly to block device
+print 'Convert qcow2 to raw and write to exported lun'
+print subprocess.check_output('qemu-img convert -f qcow2 -O raw /var/data/tmp/%s /dev/mapper/3%s' % (name, wwn), shell=True)
+
+# flush volume
+print 'Flushing LUN...'
+subprocess.check_call('%s/sh/flush_lun.sh %s' % (base_path, wwn), shell=True)
+
+# unexport volume
+print 'Unexporting volume %s from backup server...' % vvname
+_3par.unexport_vv(vvname, config.EXPORT_HOST)
+
+_3par.logout()