def test_no_scaling(self):
"""
No scaling is happening. Node instances are in terminal states.
"""
node_instances = {
'n.1':
NodeInstance({
NodeDecorator.NODE_INSTANCE_NAME_KEY:
'n.1',
NodeDecorator.SCALE_STATE_KEY:
CloudWrapper.SCALE_STATE_OPERATIONAL
}),
'm.1':
NodeInstance({
NodeDecorator.NODE_INSTANCE_NAME_KEY:
'm.1',
NodeDecorator.SCALE_STATE_KEY:
CloudWrapper.SCALE_STATE_GONE
})
}
cw = CloudWrapper(self.config_holder)
cw._get_nodes_instances = Mock(return_value=node_instances)
assert {} == cw._get_effective_scale_states()
assert None == cw._get_global_scale_state()
assert False == cw.is_vertical_scaling()
node_and_instances = cw.get_scaling_node_and_instance_names()
assert '' == node_and_instances[0]
assert [] == node_and_instances[1]
def test_consistent_scale_state_consistent_scaling_nodes(self):
"""
Consistent scale state: different scaling actions at a time are not allowed.
In case node instance is not in a terminal state (as set on the NodeInstance object),
we check the state directly on the Run (via CloudWrapper._get_runtime_parameter()).
Consistent scaling nodes: only one node type at a time is allowed to be scaled.
"""
def _get_runtime_parameter(key):
if key.endswith(NodeDecorator.NODE_PROPERTY_SEPARATOR + NodeDecorator.SCALE_STATE_KEY):
return CloudWrapper.SCALE_STATE_RESIZING
else:
return 'unknown'
node_instances = {
'n.1': NodeInstance({NodeDecorator.NODE_INSTANCE_NAME_KEY: 'n.1',
NodeDecorator.NODE_NAME_KEY: 'n',
NodeDecorator.SCALE_STATE_KEY: 'not terminal'}),
'n.2': NodeInstance({NodeDecorator.NODE_INSTANCE_NAME_KEY: 'n.2',
NodeDecorator.NODE_NAME_KEY: 'n',
NodeDecorator.SCALE_STATE_KEY: 'not terminal'}),
'm.1': NodeInstance({NodeDecorator.NODE_INSTANCE_NAME_KEY: 'm.1',
NodeDecorator.NODE_NAME_KEY: 'm',
NodeDecorator.SCALE_STATE_KEY: CloudWrapper.SCALE_STATE_OPERATIONAL})
}
cw = CloudWrapper(self.config_holder)
cw._get_runtime_parameter = Mock(side_effect=_get_runtime_parameter)
cw._get_nodes_instances = Mock(return_value=node_instances)
scale_states = cw._get_effective_scale_states()
assert 1 == len(scale_states)
assert CloudWrapper.SCALE_STATE_RESIZING in scale_states
assert 2 == len(scale_states[CloudWrapper.SCALE_STATE_RESIZING])
assert ['n.1', 'n.2'] == sorted(scale_states[CloudWrapper.SCALE_STATE_RESIZING])
assert CloudWrapper.SCALE_STATE_RESIZING == cw._get_global_scale_state()
try:
cw.check_scale_state_consistency()
except InconsistentScaleStateError as ex:
self.fail('Should not have failed with: %s' % str(ex))
node_and_instances = cw.get_scaling_node_and_instance_names()
assert 'n' == node_and_instances[0]
assert ['n.1', 'n.2'] == sorted(node_and_instances[1])
def test_consistent_scale_state_inconsistent_scaling_nodes(self):
"""
Consistent scale state: only one scaling action at a time on different node instances.
In case node instance is not in a terminal state (as set on the NodeInstance object),
we check the state directly on the Run (via CloudWrapper._get_runtime_parameter()).
Inconsistent scaling nodes: only one node type at a time is allowed to be scaled.
"""
def _get_runtime_parameter(key):
if key.endswith(NodeDecorator.NODE_PROPERTY_SEPARATOR + NodeDecorator.SCALE_STATE_KEY):
return CloudWrapper.SCALE_STATE_RESIZING
else:
return 'unknown'
node_instances = {
'n.1': NodeInstance({NodeDecorator.NODE_INSTANCE_NAME_KEY: 'n.1',
NodeDecorator.NODE_NAME_KEY: 'n',
NodeDecorator.SCALE_STATE_KEY: 'not terminal'}),
'n.2': NodeInstance({NodeDecorator.NODE_INSTANCE_NAME_KEY: 'n.2',
NodeDecorator.NODE_NAME_KEY: 'n',
NodeDecorator.SCALE_STATE_KEY: CloudWrapper.SCALE_STATE_OPERATIONAL}),
'm.1': NodeInstance({NodeDecorator.NODE_INSTANCE_NAME_KEY: 'm.1',
NodeDecorator.NODE_NAME_KEY: 'm',
NodeDecorator.SCALE_STATE_KEY: 'not terminal'}),
'm.2': NodeInstance({NodeDecorator.NODE_INSTANCE_NAME_KEY: 'm.2',
NodeDecorator.NODE_NAME_KEY: 'm',
NodeDecorator.SCALE_STATE_KEY: CloudWrapper.SCALE_STATE_GONE}),
}
cw = CloudWrapper(self.config_holder)
cw._get_runtime_parameter = Mock(side_effect=_get_runtime_parameter)
cw._get_nodes_instances = Mock(return_value=node_instances)
scale_states = cw._get_effective_scale_states()
assert 1 == len(scale_states)
assert CloudWrapper.SCALE_STATE_RESIZING in scale_states
assert 2 == len(scale_states[CloudWrapper.SCALE_STATE_RESIZING])
assert ['m.1', 'n.1'] == sorted(scale_states[CloudWrapper.SCALE_STATE_RESIZING])
assert CloudWrapper.SCALE_STATE_RESIZING == cw._get_global_scale_state()
assert True == cw.is_vertical_scaling()
self.failUnlessRaises(InconsistentScalingNodesError, cw.get_scaling_node_and_instance_names)
def test_no_scaling(self):
"""
No scaling is happening. Node instances are in terminal states.
"""
node_instances = {
'n.1': NodeInstance({NodeDecorator.NODE_INSTANCE_NAME_KEY: 'n.1',
NodeDecorator.SCALE_STATE_KEY: CloudWrapper.SCALE_STATE_OPERATIONAL}),
'm.1': NodeInstance({NodeDecorator.NODE_INSTANCE_NAME_KEY: 'm.1',
NodeDecorator.SCALE_STATE_KEY: CloudWrapper.SCALE_STATE_GONE})
}
cw = CloudWrapper(self.config_holder)
cw._get_nodes_instances = Mock(return_value=node_instances)
assert {} == cw._get_effective_scale_states()
assert None == cw._get_global_scale_state()
assert False == cw.is_vertical_scaling()
node_and_instances = cw.get_scaling_node_and_instance_names()
assert '' == node_and_instances[0]
assert [] == node_and_instances[1]
def test_consistent_scale_state_consistent_scaling_nodes(self):
"""
Consistent scale state: different scaling actions at a time are not allowed.
In case node instance is not in a terminal state (as set on the NodeInstance object),
we check the state directly on the Run (via CloudWrapper._get_runtime_parameter()).
Consistent scaling nodes: only one node type at a time is allowed to be scaled.
"""
def _get_runtime_parameter(key):
if key.endswith(NodeDecorator.NODE_PROPERTY_SEPARATOR +
NodeDecorator.SCALE_STATE_KEY):
return CloudWrapper.SCALE_STATE_RESIZING
else:
return 'unknown'
node_instances = {
'n.1':
NodeInstance({
NodeDecorator.NODE_INSTANCE_NAME_KEY: 'n.1',
NodeDecorator.NODE_NAME_KEY: 'n',
NodeDecorator.SCALE_STATE_KEY: 'not terminal'
}),
'n.2':
NodeInstance({
NodeDecorator.NODE_INSTANCE_NAME_KEY: 'n.2',
NodeDecorator.NODE_NAME_KEY: 'n',
NodeDecorator.SCALE_STATE_KEY: 'not terminal'
}),
'm.1':
NodeInstance({
NodeDecorator.NODE_INSTANCE_NAME_KEY:
'm.1',
NodeDecorator.NODE_NAME_KEY:
'm',
NodeDecorator.SCALE_STATE_KEY:
CloudWrapper.SCALE_STATE_OPERATIONAL
})
}
cw = CloudWrapper(self.config_holder)
cw._get_runtime_parameter = Mock(side_effect=_get_runtime_parameter)
cw._get_nodes_instances = Mock(return_value=node_instances)
scale_states = cw._get_effective_scale_states()
assert 1 == len(scale_states)
assert CloudWrapper.SCALE_STATE_RESIZING in scale_states
assert 2 == len(scale_states[CloudWrapper.SCALE_STATE_RESIZING])
assert ['n.1', 'n.2'
] == sorted(scale_states[CloudWrapper.SCALE_STATE_RESIZING])
assert CloudWrapper.SCALE_STATE_RESIZING == cw._get_global_scale_state(
)
try:
cw.check_scale_state_consistency()
except InconsistentScaleStateError as ex:
self.fail('Should not have failed with: %s' % str(ex))
node_and_instances = cw.get_scaling_node_and_instance_names()
assert 'n' == node_and_instances[0]
assert ['n.1', 'n.2'] == sorted(node_and_instances[1])
def test_consistent_scale_state_inconsistent_scaling_nodes(self):
"""
Consistent scale state: only one scaling action at a time on different node instances.
In case node instance is not in a terminal state (as set on the NodeInstance object),
we check the state directly on the Run (via CloudWrapper._get_runtime_parameter()).
Inconsistent scaling nodes: only one node type at a time is allowed to be scaled.
"""
def _get_runtime_parameter(key):
if key.endswith(NodeDecorator.NODE_PROPERTY_SEPARATOR +
NodeDecorator.SCALE_STATE_KEY):
return CloudWrapper.SCALE_STATE_RESIZING
else:
return 'unknown'
node_instances = {
'n.1':
NodeInstance({
NodeDecorator.NODE_INSTANCE_NAME_KEY: 'n.1',
NodeDecorator.NODE_NAME_KEY: 'n',
NodeDecorator.SCALE_STATE_KEY: 'not terminal'
}),
'n.2':
NodeInstance({
NodeDecorator.NODE_INSTANCE_NAME_KEY:
'n.2',
NodeDecorator.NODE_NAME_KEY:
'n',
NodeDecorator.SCALE_STATE_KEY:
CloudWrapper.SCALE_STATE_OPERATIONAL
}),
'm.1':
NodeInstance({
NodeDecorator.NODE_INSTANCE_NAME_KEY: 'm.1',
NodeDecorator.NODE_NAME_KEY: 'm',
NodeDecorator.SCALE_STATE_KEY: 'not terminal'
}),
'm.2':
NodeInstance({
NodeDecorator.NODE_INSTANCE_NAME_KEY:
'm.2',
NodeDecorator.NODE_NAME_KEY:
'm',
NodeDecorator.SCALE_STATE_KEY:
CloudWrapper.SCALE_STATE_GONE
}),
}
cw = CloudWrapper(self.config_holder)
cw._get_runtime_parameter = Mock(side_effect=_get_runtime_parameter)
cw._get_nodes_instances = Mock(return_value=node_instances)
scale_states = cw._get_effective_scale_states()
assert 1 == len(scale_states)
assert CloudWrapper.SCALE_STATE_RESIZING in scale_states
assert 2 == len(scale_states[CloudWrapper.SCALE_STATE_RESIZING])
assert ['m.1', 'n.1'
] == sorted(scale_states[CloudWrapper.SCALE_STATE_RESIZING])
assert CloudWrapper.SCALE_STATE_RESIZING == cw._get_global_scale_state(
)
assert True == cw.is_vertical_scaling()
self.failUnlessRaises(InconsistentScalingNodesError,
cw.get_scaling_node_and_instance_names)