Merge branch 'issue-365' into 'master'

Issue 365

See merge request !6

vmcelery.py

@@ -5,24 +5,28 @@ from os import getenv
 
 from argparse import ArgumentParser
 
-parser = ArgumentParser()
-parser.add_argument("-n", "--hostname", dest="hostname",
-                    help="Define the full queue name with"
-                    "with priority", metavar="hostname.queue.priority")
-(args, unknwon_args) = parser.parse_known_args()
-HOSTNAME = vars(args).pop("hostname")
-if HOSTNAME is None:
-    raise Exception("You must define hostname as -n <hostname> or "
-                    "--hostname=<hostname>.\n"
-                    "Hostname format must be hostname.module.priority.")
+
+def to_bool(value):
+    return value.lower() in ("true", "yes", "y", "t")
+
+if to_bool(getenv("LIBVIRT_TEST", "False")):
+    HOSTNAME = "vmdriver.test"
+else:
+    parser = ArgumentParser()
+    parser.add_argument("-n", "--hostname", dest="hostname",
+                        help="Define the full queue name with"
+                        "with priority", metavar="hostname.queue.priority")
+    (args, unknwon_args) = parser.parse_known_args()
+    HOSTNAME = vars(args).pop("hostname")
+    if HOSTNAME is None:
+        raise Exception("You must define hostname as -n <hostname> or "
+                        "--hostname=<hostname>.\n"
+                        "Hostname format must be hostname.module.priority.")
 
 AMQP_URI = getenv('AMQP_URI')
 CACHE_URI = getenv('CACHE_URI')
 
 
-def to_bool(value):
-    return value.lower() in ("true", "yes", "y", "t")
-
 # Global configuration parameters declaration
 lib_connection = None
 native_ovs = False

vmdriver.py

@@ -13,6 +13,7 @@ from psutil import NUM_CPUS, virtual_memory, cpu_percent
 from celery.contrib.abortable import AbortableTask
 
 from vm import VMInstance, VMDisk, VMNetwork
+
 from vmcelery import celery, lib_connection, to_bool
 
 sys.path.append(os.path.dirname(os.path.basename(__file__)))
@@ -550,6 +551,7 @@ def migrate(name, host, live=False):
 @req_connection
 @wrap_libvirtError
 def attach_disk(name, disk):
+    """ Attach Disk to a running virtual machine. """
     domain = lookupByName(name)
     disk = VMDisk.deserialize(disk)
     domain.attachDevice(disk.dump_xml())
@@ -559,9 +561,25 @@ def attach_disk(name, disk):
 @req_connection
 @wrap_libvirtError
 def detach_disk(name, disk):
+    """ Detach disk from a running virtual machine. """
     domain = lookupByName(name)
     disk = VMDisk.deserialize(disk)
     domain.detachDevice(disk.dump_xml())
+    # Libvirt does NOT report failed detach so test it.
+    __check_detach(domain, disk.source)
+
+
+def __check_detach(domain, disk):
+    """ Test if detach was successfull by searching
+    for disk in the XML"""
+    xml = domain.XMLDesc()
+    root = ET.fromstring(xml)
+    devices = root.find('devices')
+    for d in devices.findall("disk"):
+        if disk in d.find('source').attrib.values()[0]:
+            raise Exception("Disk could not been detached. "
+                            "Check if hot plug support is "
+                            "enabled (acpiphp module on Linux).")
 
 
 @celery.task