def test_resource_acquire(self):
""" test_resource_acquire.
Acquire a single VM. Demonstrate how to determine the VMs IP address.
"""
mgr = resource.Manager(GLOBAL.connection, GLOBAL.name, 10, True)
current_vms = mgr.detail_get().resource_available
vm1 = mgr.acquire()
##
# The ip attribute provides the IP address of the VM.
self.assertTrue(vm1.ip_addr is not None)
##
##
# Assert that one VM was acquires. The number of avaliable VMs
# will now be less max.
details = mgr.detail_get()
self.assertTrue(details.resource_available < current_vms)
mgr.release(vm1)
for _ in range(40 * 6):
time.sleep(5)
details = mgr.detail_get()
self.assertTrue(details)
if details.resource_available == current_vms:
return
details = mgr.detail_get()
self.assertTrue(details)
self.assertEqual(details.resource_available, current_vms)
def test_detail_get(self):
""" Show Hypervisor details. """
##
# Shows an example of the context manager.
hndl = resource.Manager(GLOBAL.connection, GLOBAL.name, 10)
details = hndl.detail_get()
self.assertTrue(details)
self.assertEqual(details.resource_max, 3)
def test_resource_context_manager(self):
""" show using client context manager. """
##
# Shows an example of the context manager.
mgr = resource.Manager(GLOBAL.connection, GLOBAL.name, 10)
with resource.CtxtMgr(mgr) as vm1:
##
# This assert is to show that a different VM was picked.
self.assertTrue(vm1 is not None)
self.assertTrue(vm1.id is not None)
self.assertTrue(vm1.ip_addr is not None)
def test_non_blocking(self):
""" test_non_blocking check non-blocking. """
mgr = resource.Manager(GLOBAL.connection, GLOBAL.name, 10, True)
details = mgr.detail_get()
self.assertEqual(details.resource_max, 3)
##
# Shows an example of the context manager.
vms = [mgr.acquire() for _ in range(details.resource_max)]
self.assertTrue(vms)
##
# Here we check for non-blocking.
self.assertRaises(resource.ResourceError, mgr.acquire, False)
def test_blocking(self):
""" test_blocking. show waiting for VM to be available.
There are at most 3 VMs available so take 4. With blocking
there should never be an exception thrown.
"""
names = set()
mgr = resource.Manager(GLOBAL.connection, GLOBAL.name, 10, True)
details = mgr.detail_get()
self.assertEqual(details.resource_max, 3)
count = details.resource_max - 1
##
# Shows an example of the context manager.
for count in range(count):
with resource.CtxtMgr(mgr) as vm1:
##
# This assert is to show that a different VM was picked.
self.assertTrue(vm1 is not None)
names.add(vm1.name)
##
##
vm1 = mgr.acquire(True)
self.assertTrue(vm1.name not in names)
mgr.release(vm1)
count = 0
for _ in range(100):
details = mgr.detail_get()
count = details.resource_available
if count == 3:
return
time.sleep(20)
raise ValueError("never recovered all three VMs.")
def tearDown(self):
""" Release all resources. """
mgr = resource.Manager(GLOBAL.connection, GLOBAL.name, 10, True)
mgr.release_all()
mgr.resource_wait()