Useful for finding attached blocks for openvz

scrambled_iscsi.py

#!/usr/bin/env python

import sys
import commands

command_list = "sudo vzlist -aH | awk '{print $1}'"
vzid = commands.getoutput(command_list)
for vz in vzid.split('\n'):
    print "VZID: {0}".format(vz)
    command_ext_storage = """sudo cat /etc/vz/conf/{vz}.ext_storage""".format(vz=vz)
    config_output = commands.getoutput(command_ext_storage)
    config = config_output.split(' ')[13].strip('"').rstrip('",')
    command_mount = "sudo ls -la /dev/disk/by-path | grep {0}".format(config)
    mountpoint = commands.getoutput(command_mount)
    mount = mountpoint.split('/')[len(mountpoint.split('/')) -1:][0]
    if len(mount) > 1:
        command_blockstart = "sudo ls -la /dev/{0}".format(mount)
        block = commands.getoutput(command_blockstart)
        command_actualblock = "sudo cat /etc/vz/conf/{0}.conf | grep DEVICES".format(vz)
        ablock = commands.getoutput(command_actualblock)
        print "Mapped Blocks: {0} {1}".format(ablock.split(':')[1], ablock.split(':')[2])
        print "Expected Blocks: {0} {1}".format(block.split(' ')[4].strip(','), block.split(' ')[5])
        a1, a2, b1, b2 = ablock.split(':')[1], ablock.split(':')[2], block.split(' ')[4].strip(','), block.split(' ')[5]
        if a1 not in b1 or a2 not in b2:
            print "**Error: No match found"
            try:
                if sys.argv[1] == '--print-fix':
                    print """---- How to fix it ----"""
                    print """rm /var/lib/vz/private/{0}/dev/vdb""".format(vz)
                    print """mknod /var/lib/vz/private/{0}/dev/vdb b {1} {2}""".format(vz, b1, b2)
                    print """vzctl set {0} --save --devices b:{1}:{2}:rw""".format(vz, b1, b2)
            except: 
                pass
        print "--- end ---"