--- /dev/null
+#!/usr/bin/env python
+
+import sys
+import os.path
+from subprocess import call, PIPE, Popen
+from invirt.config import structs as config
+
+def check(b):
+ if not b:
+ exit(1)
+
+vg = "xenvg"
+prefix = "d_"
+
+subcommand = sys.argv[1]
+
+def ensureoff(machine):
+ # Make sure the machine is off, but we don't care about errors if it is already off.
+ rv = call(["/usr/sbin/xm", "destroy", prefix + machine],
+ stderr=PIPE)
+
+if subcommand == "lvcreate-all":
+ from invirt import database
+ import re
+ database.connect()
+ for d in Disk.select():
+ check(re.match('^[A-Za-z0-9]+$', d.guest_device_name))
+ machine = Machine.get(d.machine_id)
+ check(re.match('^[A-Za-z0-9][A-Za-z0-9._-]*$', machine.name))
+ lvname = prefix + machine.name + "_" + d.guest_device_name
+ if not os.path.exists("/dev/%s/%s" % (vg, lvname)):
+ # LV doesn't exist
+ print >>sys.stderr, "Creating LV %s..." % (lvname,)
+ rv = call(["/sbin/lvcreate", "-L", str(d.size) + "M", "-n", lvname, vg])
+ if rv != 0:
+ print >>sys.stderr, "Error creating LV %s\n" %(lvname,)
+ sys.exit(1)
+else:
+ machine = sys.argv[2]
+ disk = sys.argv[3]
+ lvname = prefix + machine + "_" + disk
+ lvpath = "/dev/" + vg + "/" + lvname
+if subcommand == "lvremove":
+ def error():
+ print >>sys.stderr, "Error removing LV %s\n" % lvname
+ sys.exit(1)
+ # I know this is the wrong answer, but sometimes the first
+ # lvchange -a n fails for no particularly good reason, so this is
+ # a pretty good workaround
+ call(["/sbin/lvchange", "-a", "n", lvpath])
+ rv = call(["/sbin/lvchange", "-a", "n", lvpath])
+ if rv != 0:
+ error()
+ rv = call(["/sbin/lvchange", "-a", "ey", lvpath])
+ if rv != 0:
+ error()
+ rv = call(["/sbin/lvremove", "--force", lvpath])
+ if rv != 0:
+ error()
+ ensureoff(machine)
+elif subcommand == "lvresize":
+ size = sys.argv[4]
+ ensureoff(machine)
+ p = Popen(["/sbin/lvresize", "-L", size + "M", lvpath],
+ stdin=PIPE, stderr=PIPE)
+ print >> p.stdin, 'y'
+ err = p.stderr.read()
+ if p.wait() != 0 and 'matches existing size' not in err:
+ print >> sys.stderr, "Error resizing LV %s:\n" %(lvname,)
+ print >> sys.stderr, err
+ sys.exit(1)
+ print >> sys.stderr, err
+elif subcommand == "lvrename":
+ newmachine = sys.argv[4]
+ newlvname = prefix + newmachine + "_" + disk
+ ensureoff(machine)
+ ensureoff(newmachine)
+ rv = call(["/sbin/lvrename", vg, lvname, newlvname])
+ if rv != 0:
+ print >>sys.stderr, "Error renaming LV %s\n" %(lvname,)
+ sys.exit(1)
+elif subcommand == "lvcreate":
+ size = sys.argv[4]
+ rv = call(["/sbin/lvcreate", "-L", size + "M", "-n", lvname, vg])
+ if rv != 0:
+ print >>sys.stderr, "Error creating LV %s\n" %(lvname,)
+ sys.exit(1)
+
+