1 | #!/usr/bin/env python |
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2 | |
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3 | import sys |
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4 | import time |
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5 | import os |
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6 | import random |
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7 | import string |
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8 | from subprocess import call, PIPE, Popen |
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9 | from invirt.config import structs as config |
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10 | |
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11 | def check(b): |
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12 | if not b: |
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13 | exit(1) |
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14 | |
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15 | vg = "xenvg" |
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16 | prefix = "d_" |
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17 | |
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18 | subcommand = sys.argv[1] |
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19 | |
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20 | def ensureoff(machine): |
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21 | # Make sure the machine is off, but we don't care about errors if it is already off. |
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22 | rv = call(["/usr/sbin/xm", "destroy", prefix + machine], |
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23 | stderr=PIPE) |
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24 | |
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25 | if subcommand == "lvcreate-all": |
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26 | from invirt import database |
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27 | import re |
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28 | database.connect() |
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29 | for d in Disk.select(): |
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30 | check(re.match('^[A-Za-z0-9]+$', d.guest_device_name)) |
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31 | machine = Machine.get(d.machine_id) |
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32 | check(re.match('^[A-Za-z0-9][A-Za-z0-9._-]*$', machine.name)) |
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33 | lvname = prefix + machine.name + "_" + d.guest_device_name |
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34 | if not os.path.exists("/dev/%s/%s" % (vg, lvname)): |
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35 | # LV doesn't exist |
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36 | print >>sys.stderr, "Creating LV %s..." % (lvname,) |
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37 | rv = call(["/sbin/lvcreate", "-L", str(d.size) + "M", "-n", lvname, vg]) |
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38 | if rv != 0: |
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39 | print >>sys.stderr, "Error creating LV %s\n" %(lvname,) |
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40 | sys.exit(1) |
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41 | else: |
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42 | machine = sys.argv[2] |
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43 | disk = sys.argv[3] |
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44 | lvname = prefix + machine + "_" + disk |
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45 | lvpath = "/dev/" + vg + "/" + lvname |
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46 | if subcommand == "lvremove": |
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47 | def error(): |
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48 | print >>sys.stderr, "Error removing LV %s\n" % lvname |
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49 | sys.exit(1) |
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50 | |
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51 | # Rename the LV to something else so we can wipe it before reusing |
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52 | # the space |
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53 | while True: |
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54 | new_lvname = "old_%s_%s" % (lvname, ''.join(random.choice(string.ascii_letters) for i in xrange(6))) |
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55 | new_lvpath = "/dev/%s/%s" % (vg, new_lvname) |
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56 | p = Popen(["/sbin/lvrename", lvpath, new_lvpath], stdout=PIPE, stderr=PIPE) |
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57 | rv = p.wait() |
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58 | if rv == 5 and 'already exists in volume group' in p.stderr.read(): |
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59 | continue |
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60 | elif rv != 0: |
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61 | error() |
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62 | else: |
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63 | break |
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64 | ensureoff(machine) |
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65 | |
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66 | # Touch a file corresponding to the new name of the LV; a separate |
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67 | # daemon will handle wiping and deleting it. |
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68 | open(os.path.join('/var/lib/invirt-remote/cleanup', new_lvname), 'w') |
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69 | elif subcommand == "lvresize": |
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70 | size = sys.argv[4] |
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71 | ensureoff(machine) |
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72 | p = Popen(["/sbin/lvresize", "-L", size + "M", lvpath], |
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73 | stdin=PIPE, stderr=PIPE) |
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74 | print >> p.stdin, 'y' |
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75 | err = p.stderr.read() |
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76 | if p.wait() != 0 and 'matches existing size' not in err: |
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77 | print >> sys.stderr, "Error resizing LV %s:\n" %(lvname,) |
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78 | print >> sys.stderr, err |
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79 | sys.exit(1) |
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80 | print >> sys.stderr, err |
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81 | elif subcommand == "lvrename": |
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82 | newmachine = sys.argv[4] |
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83 | newlvname = prefix + newmachine + "_" + disk |
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84 | ensureoff(machine) |
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85 | ensureoff(newmachine) |
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86 | rv = call(["/sbin/lvrename", vg, lvname, newlvname]) |
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87 | if rv != 0: |
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88 | print >>sys.stderr, "Error renaming LV %s\n" %(lvname,) |
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89 | sys.exit(1) |
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90 | elif subcommand == "lvcreate": |
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91 | size = sys.argv[4] |
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92 | rv = call(["/sbin/lvcreate", "-L", size + "M", "-n", lvname, vg]) |
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93 | if rv != 0: |
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94 | print >>sys.stderr, "Error creating LV %s\n" %(lvname,) |
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95 | sys.exit(1) |
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96 | |
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