source: trunk/packages/sipb-xen-remctl-auto/files/usr/sbin/sipb-xen-lvm @ 1066

Last change on this file since 1066 was 1066, checked in by broder, 15 years ago

Explicitly lock an LV before trying to delete it

  • Property svn:executable set to *
File size: 2.6 KB
Line 
1#!/usr/bin/env python
2
3import sys
4import os.path
5from subprocess import call, PIPE, Popen
6from invirt.config import structs as config
7
8def check(b):
9    if not b:
10        exit(1)
11
12vg = "xenvg"
13prefix = "d_"
14
15subcommand = sys.argv[1]
16
17def ensureoff(machine):
18    # Make sure the machine is off, but we don't care about errors if it is already off.
19    rv = call(["/usr/sbin/xm", "destroy", prefix + machine],
20              stderr=PIPE)
21
22if subcommand == "lvcreate-all":
23    from invirt import database
24    import re
25    database.connect()
26    for d in Disk.select():
27        check(re.match('^[A-Za-z0-9]+$', d.guest_device_name))
28        machine = Machine.get(d.machine_id)
29        check(re.match('^[A-Za-z0-9][A-Za-z0-9._-]*$', machine.name))
30        lvname = prefix + machine.name + "_" + d.guest_device_name
31        if not os.path.exists("/dev/%s/%s" % (vg, lvname)):
32            # LV doesn't exist
33            print >>sys.stderr, "Creating LV %s..." % (lvname,)
34            rv = call(["/sbin/lvcreate", "-L", str(d.size) + "M", "-n", lvname, vg])
35            if rv != 0:
36                print >>sys.stderr, "Error creating LV %s\n" %(lvname,)
37                sys.exit(1)
38else:
39    machine = sys.argv[2]
40    disk = sys.argv[3]
41    lvname = prefix + machine + "_" + disk
42    lvpath = "/dev/" + vg + "/" + lvname
43if subcommand == "lvremove":
44    def error():
45        print >>sys.stderr, "Error removing LV %s\n" % lvname
46        sys.exit(1)
47    rv = call(["/sbin/lvchange", "-a", "n", lvpath])
48    if rv != 0:
49        error()
50    rv = call(["/sbin/lvchange", "-a", "ey", lvpath])
51    if rv != 0:
52        error()
53    rv = call(["/sbin/lvremove", "--force", lvpath])
54    if rv != 0:
55        error()
56    ensureoff(machine)
57elif subcommand == "lvresize":
58    size = sys.argv[4]
59    ensureoff(machine)
60    p = Popen(["/sbin/lvresize", "-L", size + "M", lvpath],
61              stdin=PIPE, stderr=PIPE)
62    print >> p.stdin, 'y'
63    err = p.stderr.read()
64    if p.wait() != 0 and 'matches existing size' not in err:
65        print >> sys.stderr, "Error resizing LV %s:\n" %(lvname,)
66        print >> sys.stderr, err
67        sys.exit(1)
68    print >> sys.stderr, err
69elif subcommand == "lvrename":
70    newmachine = sys.argv[4]
71    newlvname = prefix + newmachine + "_" + disk
72    ensureoff(machine)
73    ensureoff(newmachine)   
74    rv = call(["/sbin/lvrename", vg, lvname, newlvname])
75    if rv != 0:
76        print >>sys.stderr, "Error renaming LV %s\n" %(lvname,)
77        sys.exit(1)
78elif subcommand == "lvcreate":
79    size = sys.argv[4]
80    rv = call(["/sbin/lvcreate", "-L", size + "M", "-n", lvname, vg])
81    if rv != 0:
82        print >>sys.stderr, "Error creating LV %s\n" %(lvname,)
83        sys.exit(1)
84   
85
Note: See TracBrowser for help on using the repository browser.