def test_active_if_node_is_draining(self):
"""
If the node is DRAINING, :func:`CLBNode.is_active` returns `True`.
"""
node = CLBNode(node_id='1234', description=self.drain_desc,
address='10.1.1.1', drained_at=0.0, connections=1)
self.assertTrue(node.is_active())
def test_no_draining(self):
"""
Doesnt fetch feeds if all nodes are ENABLED
"""
seq = [
lb_req('loadbalancers', True,
{'loadBalancers': [{
'id': 1
}, {
'id': 2
}]}),
parallel_sequence([[nodes_req(1, [node('11', 'a11')])],
[nodes_req(2, [node('21', 'a21')])],
[lb_hm_req(1, {})], [lb_hm_req(2, {})]]),
parallel_sequence([]) # No nodes to fetch
]
make_desc = partial(CLBDescription,
port=20,
weight=2,
condition=CLBNodeCondition.ENABLED,
type=CLBNodeType.PRIMARY)
eff = get_clb_contents()
self.assertEqual(perform_sequence(seq, eff), ([
CLBNode(
node_id='11', address='a11', description=make_desc(lb_id='1')),
CLBNode(
node_id='21', address='a21', description=make_desc(lb_id='2'))
], {
'1': CLB(False),
'2': CLB(False)
}))
def test_success(self):
"""
Gets LB contents with drained_at correctly
"""
node11 = node('11', 'a11', condition='DRAINING')
node12 = node('12', 'a12')
node21 = node('21', 'a21', weight=3)
node22 = node('22', 'a22', weight=None, condition='DRAINING')
seq = [
lb_req('loadbalancers', True,
{'loadBalancers': [{'id': 1}, {'id': 2}]}),
parallel_sequence([[nodes_req(1, [node11, node12])],
[nodes_req(2, [node21, node22])],
[lb_hm_req(1, {"type": "CONNECT"})],
[lb_hm_req(2, {})]]),
parallel_sequence([[node_feed_req('1', '11', '11feed')],
[node_feed_req('2', '22', '22feed')]]),
]
eff = get_clb_contents()
self.assertEqual(
perform_sequence(seq, eff),
([attr.assoc(CLBNode.from_node_json(1, node11), _drained_at=1.0),
CLBNode.from_node_json(1, node12),
CLBNode.from_node_json(2, node21),
attr.assoc(CLBNode.from_node_json(2, node22), _drained_at=2.0)],
{'1': CLB(True), '2': CLB(False)}))
def test_success(self):
"""
Gets LB contents with drained_at correctly
"""
node11 = node('11', 'a11', condition='DRAINING')
node12 = node('12', 'a12')
node21 = node('21', 'a21', weight=3)
node22 = node('22', 'a22', weight=None, condition='DRAINING')
seq = [
lb_req('loadbalancers', True,
{'loadBalancers': [{
'id': 1
}, {
'id': 2
}]}),
parallel_sequence([[nodes_req(1, [node11, node12])],
[nodes_req(2, [node21, node22])],
[lb_hm_req(1, {"type": "CONNECT"})],
[lb_hm_req(2, {})]]),
parallel_sequence([[node_feed_req('1', '11', '11feed')],
[node_feed_req('2', '22', '22feed')]]),
]
eff = get_clb_contents()
self.assertEqual(perform_sequence(seq, eff), ([
attr.assoc(CLBNode.from_node_json(1, node11), _drained_at=1.0),
CLBNode.from_node_json(1, node12),
CLBNode.from_node_json(2, node21),
attr.assoc(CLBNode.from_node_json(2, node22), _drained_at=2.0)
], {
'1': CLB(True),
'2': CLB(False)
}))
def test_current_draining_false_if_description_not_draining(self):
"""
:func:`CLBNode.currently_draining` returns `False` if
`CLBNode.description.condition` is not :obj:`CLBNodeCondition.DRAINING`
"""
node = CLBNode(node_id='1234', description=self.desc, address='10.1.1.1')
self.assertFalse(node.currently_draining())
def test_matches_only_if_server_address_matches_node_address(self):
"""
:func:`CLBNode.matches` returns True only if the :class:`NovaServer`
has the same ServiceNet address as the node address
"""
node = CLBNode(node_id="1234", description=self.desc, address="10.1.1.1")
self.assertFalse(
node.matches(
NovaServer(
id="1",
state=ServerState.ACTIVE,
created=0.0,
servicenet_address="10.1.1.2",
image_id="image",
flavor_id="flavor",
)
)
)
self.assertTrue(
node.matches(
NovaServer(
id="1",
state=ServerState.ACTIVE,
created=0.0,
servicenet_address="10.1.1.1",
image_id="image",
flavor_id="flavor",
)
)
)
def test_matches_only_works_with_NovaServers(self):
"""
:func:`CLBNode.matches` returns false if the server is not an instance
of :class:`NovaServer`.
"""
node = CLBNode(node_id="1234", description=self.desc, address="10.1.1.1")
self.assertFalse(node.matches(DummyServer(servicenet_address="10.1.1.1")))
def test_active_if_node_is_draining(self):
"""
If the node is DRAINING, :func:`CLBNode.is_active` returns `True`.
"""
node = CLBNode(node_id='1234', description=self.drain_desc,
address='10.1.1.1', drained_at=0.0, connections=1)
self.assertTrue(node.is_active())
def test_done_draining_past_timeout_even_if_there_are_connections(self):
"""
If there are still connections, but the node has been in draining past
the timeout, :func:`CLBNode.is_done_draining` returns `True`.
"""
node = CLBNode(node_id="1234", description=self.drain_desc, address="10.1.1.1", drained_at=0.0, connections=1)
self.assertTrue(node.is_done_draining(now=30, timeout=15))
def test_current_draining_false_if_description_not_draining(self):
"""
:func:`CLBNode.currently_draining` returns `False` if
`CLBNode.description.condition` is not :obj:`CLBNodeCondition.DRAINING`
"""
node = CLBNode(node_id="1234", description=self.desc, address="10.1.1.1")
self.assertFalse(node.currently_draining())
def test_current_draining_true_if_description_is_draining(self):
"""
:func:`CLBNode.currently_draining` returns `True` if
`CLBNode.description.condition` is :obj:`CLBNodeCondition.DRAINING`
"""
node = CLBNode(node_id="1234", description=self.drain_desc, address="10.1.1.1")
self.assertTrue(node.currently_draining())
def test_done_draining_before_timeout_if_there_are_no_connections(self):
"""
If there are zero connections, but the node has been in draining less
than the timeout, :func:`CLBNode.is_done_draining` returns `True`.
"""
node = CLBNode(node_id="1234", description=self.drain_desc, address="10.1.1.1", drained_at=0.0, connections=0)
self.assertTrue(node.is_done_draining(now=15, timeout=30))
def test_done_draining_past_timeout_even_if_no_connection_info(self):
"""
If connection information is not provided, and the node has been in
draining past the timeout, :func:`CLBNode.is_done_draining` returns
`True`.
"""
node = CLBNode(node_id="1234", description=self.drain_desc, address="10.1.1.1", drained_at=0.0)
self.assertTrue(node.is_done_draining(now=30, timeout=15))
def test_done_draining_before_timeout_if_there_are_no_connections(self):
"""
If there are zero connections, but the node has been in draining less
than the timeout, :func:`CLBNode.is_done_draining` returns `True`.
"""
node = CLBNode(node_id='1234', description=self.drain_desc,
address='10.1.1.1', drained_at=0.0, connections=0)
self.assertTrue(node.is_done_draining(now=15, timeout=30))
def test_done_draining_past_timeout_even_if_there_are_connections(self):
"""
If there are still connections, but the node has been in draining past
the timeout, :func:`CLBNode.is_done_draining` returns `True`.
"""
node = CLBNode(node_id='1234', description=self.drain_desc,
address='10.1.1.1', drained_at=0.0, connections=1)
self.assertTrue(node.is_done_draining(now=30, timeout=15))
def test_current_draining_true_if_description_is_draining(self):
"""
:func:`CLBNode.currently_draining` returns `True` if
`CLBNode.description.condition` is :obj:`CLBNodeCondition.DRAINING`
"""
node = CLBNode(node_id='1234', description=self.drain_desc,
address='10.1.1.1')
self.assertTrue(node.currently_draining())
def test_not_done_draining_before_timeout_if_no_connection_info(self):
"""
If connection information is not provided, and the node has been in
draining less than the timeout, :func:`CLBNode.is_done_draining`
returns `False`.
"""
node = CLBNode(node_id="1234", description=self.drain_desc, address="10.1.1.1", drained_at=0.0)
self.assertFalse(node.is_done_draining(now=15, timeout=30))
def test_not_done_draining_before_timeout_if_no_connection_info(self):
"""
If connection information is not provided, and the node has been in
draining less than the timeout, :func:`CLBNode.is_done_draining`
returns `False`.
"""
node = CLBNode(node_id='1234', description=self.drain_desc,
address='10.1.1.1', drained_at=0.0)
self.assertFalse(node.is_done_draining(now=15, timeout=30))
def test_done_draining_past_timeout_even_if_no_connection_info(self):
"""
If connection information is not provided, and the node has been in
draining past the timeout, :func:`CLBNode.is_done_draining` returns
`True`.
"""
node = CLBNode(node_id='1234', description=self.drain_desc,
address='10.1.1.1', drained_at=0.0)
self.assertTrue(node.is_done_draining(now=30, timeout=15))
def test_matches_only_works_with_NovaServers(self):
"""
:func:`CLBNode.matches` returns false if the server is not an instance
of :class:`NovaServer`.
"""
node = CLBNode(node_id='1234', description=self.desc,
address='10.1.1.1')
self.assertFalse(
node.matches(DummyServer(servicenet_address="10.1.1.1")))
def test_inactive_if_node_is_disabled(self):
"""
If the node is DRAINING, :func:`CLBNode.is_active` returns `True`.
"""
node = CLBNode(node_id='1234',
description=CLBDescription(
lb_id='12345', port=80,
condition=CLBNodeCondition.DISABLED),
address='10.1.1.1', drained_at=0.0, connections=1)
self.assertFalse(node.is_active())
def test_inactive_if_node_is_disabled(self):
"""
If the node is DRAINING, :func:`CLBNode.is_active` returns `True`.
"""
node = CLBNode(node_id='1234',
description=CLBDescription(
lb_id='12345', port=80,
condition=CLBNodeCondition.DISABLED),
address='10.1.1.1', drained_at=0.0, connections=1)
self.assertFalse(node.is_active())
def test_matches_only_if_server_address_matches_node_address(self):
"""
:func:`CLBNode.matches` returns True only if the :class:`NovaServer`
has the same ServiceNet address as the node address
"""
node = CLBNode(node_id='1234', description=self.desc,
address='10.1.1.1')
self.assertFalse(node.matches(
NovaServer(id='1', state=ServerState.ACTIVE, created=0.0,
servicenet_address="10.1.1.2",
image_id='image', flavor_id='flavor')))
self.assertTrue(node.matches(
NovaServer(id='1', state=ServerState.ACTIVE, created=0.0,
servicenet_address="10.1.1.1",
image_id='image', flavor_id='flavor')))
def test_lb_disappeared_during_node_fetch(self):
"""
If a load balancer gets deleted while fetching nodes, no nodes will be
returned for it.
"""
seq = [
lb_req('loadbalancers', True,
{'loadBalancers': [{
'id': 1
}, {
'id': 2
}]}),
parallel_sequence([[nodes_req(1, [node('11', 'a11')])],
[
lb_req('loadbalancers/2/nodes', True,
CLBNotFoundError(lb_id=u'2'))
], [lb_hm_req(1, {"type": "CONNECT"})],
[
lb_req('loadbalancers/2/healthmonitor',
True, CLBNotFoundError(lb_id=u'2'))
]]),
parallel_sequence([]) # No node feeds to fetch
]
make_desc = partial(CLBDescription,
port=20,
weight=2,
condition=CLBNodeCondition.ENABLED,
type=CLBNodeType.PRIMARY)
eff = get_clb_contents()
self.assertEqual(perform_sequence(seq, eff), ([
CLBNode(
node_id='11', address='a11', description=make_desc(lb_id='1'))
], {
'1': CLB(True)
}))
def test_from_node_json_with_weight(self):
"""
A node's JSON representation can be parsed to a :obj:`CLBNode` object
with a `CLBDescription`. When weight is not specified it defaults to 1.
"""
node_json = {
"id": "node1",
"address": "1.2.3.4",
"port": 20,
"condition": "DRAINING",
"type": "SECONDARY",
"weight": 50,
}
node = CLBNode.from_node_json(123, node_json)
self.assertEqual(
node,
CLBNode(
node_id="node1",
address="1.2.3.4",
connections=None,
drained_at=0.0,
description=CLBDescription(
lb_id="123", port=20, weight=50, condition=CLBNodeCondition.DRAINING, type=CLBNodeType.SECONDARY
),
),
)
def test_lb_disappeared_during_feed_fetch(self):
"""
If a load balancer gets deleted while fetching feeds, no nodes will be
returned for it.
"""
node21 = node('21', 'a21', condition='DRAINING', weight=None)
seq = [
lb_req('loadbalancers', True,
{'loadBalancers': [{
'id': 1
}, {
'id': 2
}]}),
parallel_sequence([[
nodes_req(1, [
node('11', 'a11', condition='DRAINING'),
node('12', 'a12')
])
], [nodes_req(2, [node21])], [lb_hm_req(1, {"type": "CONNECT"})],
[lb_hm_req(2, {"type": "CONNECT"})]]),
parallel_sequence(
[[node_feed_req('1', '11', CLBNotFoundError(lb_id=u'1'))],
[node_feed_req('2', '21', '22feed')]]),
]
eff = get_clb_contents()
self.assertEqual(
perform_sequence(seq, eff),
([attr.assoc(CLBNode.from_node_json(2, node21), _drained_at=2.0)
], {
'2': CLB(True)
}))
def test_success(self):
"""
The data is returned as a tuple of ([NovaServer], [CLBNode/RCv3Node]).
"""
clb_nodes = [CLBNode(node_id='node1', address='ip1',
description=CLBDescription(lb_id='lb1', port=80))]
rcv3_nodes = [RCv3Node(node_id='node2', cloud_server_id='a',
description=RCv3Description(lb_id='lb2'))]
eff = get_all_launch_server_data(
'tid',
'gid',
self.now,
get_scaling_group_servers=_constant_as_eff(
('tid', 'gid', self.now), self.servers),
get_clb_contents=_constant_as_eff((), clb_nodes),
get_rcv3_contents=_constant_as_eff((), rcv3_nodes))
expected_servers = [
server('a', ServerState.ACTIVE, servicenet_address='10.0.0.1',
links=freeze([{'href': 'link1', 'rel': 'self'}]),
json=freeze(self.servers[0])),
server('b', ServerState.ACTIVE, created=1,
servicenet_address='10.0.0.2',
links=freeze([{'href': 'link2', 'rel': 'self'}]),
json=freeze(self.servers[1]))
]
self.assertEqual(resolve_stubs(eff),
{'servers': expected_servers,
'lb_nodes': clb_nodes + rcv3_nodes})
def test_lb_disappeared_during_feed_fetch(self):
"""
If a load balancer gets deleted while fetching feeds, no nodes will be
returned for it.
"""
node21 = node('21', 'a21', condition='DRAINING', weight=None)
seq = [
lb_req('loadbalancers', True,
{'loadBalancers': [{'id': 1}, {'id': 2}]}),
parallel_sequence([
[nodes_req(1, [node('11', 'a11', condition='DRAINING'),
node('12', 'a12')])],
[nodes_req(2, [node21])],
[lb_hm_req(1, {"type": "CONNECT"})],
[lb_hm_req(2, {"type": "CONNECT"})]
]),
parallel_sequence([
[node_feed_req('1', '11', CLBNotFoundError(lb_id=u'1'))],
[node_feed_req('2', '21', '22feed')]]),
]
eff = get_clb_contents()
self.assertEqual(
perform_sequence(seq, eff),
([attr.assoc(CLBNode.from_node_json(2, node21), _drained_at=2.0)],
{'2': CLB(True)}))
def test_provides_ILBDescription_and_IDrainable(self):
"""
An instance of :class:`CLBNode` provides :class:`ILBNode` and
:class:`IDrainable`.
"""
node = CLBNode(node_id='1234', description=self.desc, address='10.1.1.1')
self.assertTrue(ILBNode.providedBy(node))
self.assertTrue(IDrainable.providedBy(node))
def test_from_node_json_no_weight(self):
"""
A node's JSON representation can be parsed to a :obj:`CLBNode` object
with a `CLBDescription`. When weight is not specified it defaults to 1.
"""
node_json = {'id': 'node1', 'address': '1.2.3.4', 'port': 20,
'condition': 'DRAINING', 'type': 'SECONDARY'}
node = CLBNode.from_node_json(123, node_json)
self.assertEqual(
node,
CLBNode(node_id='node1', address='1.2.3.4',
connections=None, drained_at=0.0,
description=CLBDescription(
lb_id='123', port=20,
weight=1,
condition=CLBNodeCondition.DRAINING,
type=CLBNodeType.SECONDARY)))
def get_clb_contents():
"""
Get Rackspace Cloud Load Balancer contents as list of `CLBNode`. CLB
health monitor information is also returned as a pmap of :obj:`CLB` objects
mapped on LB ID.
:return: Effect of (``list`` of :obj:`CLBNode`, `pmap` of :obj:`CLB`)
:rtype: :obj:`Effect`
"""
# If we get a CLBNotFoundError while fetching feeds, we should throw away
# all nodes related to that load balancer, because we don't want to act on
# data that we know is invalid/outdated (for example, if we can't fetch a
# feed because CLB was deleted, we don't want to say that we have a node in
# DRAINING with draining time of 0; we should just say that the node is
# gone).
def gone(r):
return catch(CLBNotFoundError, lambda exc: r)
lb_ids = [lb['id'] for lb in (yield _retry(get_clbs()))]
node_reqs = [_retry(get_clb_nodes(lb_id).on(error=gone([])))
for lb_id in lb_ids]
healthmon_reqs = [
_retry(get_clb_health_monitor(lb_id).on(error=gone(None)))
for lb_id in lb_ids]
all_nodes_hms = yield parallel(node_reqs + healthmon_reqs)
all_nodes, hms = all_nodes_hms[:len(lb_ids)], all_nodes_hms[len(lb_ids):]
lb_nodes = {
lb_id: [CLBNode.from_node_json(lb_id, node)
for node in nodes]
for lb_id, nodes in zip(lb_ids, all_nodes)}
clbs = {
str(lb_id): CLB(bool(health_mon))
for lb_id, health_mon in zip(lb_ids, hms) if health_mon is not None}
draining = [n for n in concat(lb_nodes.values())
if n.description.condition == CLBNodeCondition.DRAINING]
feeds = yield parallel(
[_retry(get_clb_node_feed(n.description.lb_id, n.node_id).on(
error=gone(None)))
for n in draining]
)
nodes_to_feeds = dict(zip(draining, feeds))
deleted_lbs = set([
node.description.lb_id
for (node, feed) in nodes_to_feeds.items() if feed is None])
def update_drained_at(node):
feed = nodes_to_feeds.get(node)
if node.description.lb_id in deleted_lbs:
return None
if feed is not None:
node.drained_at = extract_clb_drained_at(feed)
return node
nodes = map(update_drained_at, concat(lb_nodes.values()))
yield do_return((
list(filter(bool, nodes)),
pmap(keyfilter(lambda k: k not in deleted_lbs, clbs))))
def test_success(self):
"""
Gets LB contents with drained_at correctly
"""
node11 = node("11", "a11", condition="DRAINING")
node12 = node("12", "a12")
node21 = node("21", "a21", weight=3)
node22 = node("22", "a22", weight=None, condition="DRAINING")
seq = [
lb_req("loadbalancers", True, {"loadBalancers": [{"id": 1}, {"id": 2}]}),
parallel_sequence([[nodes_req(1, [node11, node12])], [nodes_req(2, [node21, node22])]]),
parallel_sequence([[node_feed_req(1, "11", "11feed")], [node_feed_req(2, "22", "22feed")]]),
]
eff = get_clb_contents()
self.assertEqual(
perform_sequence(seq, eff),
[
assoc_obj(CLBNode.from_node_json(1, node11), drained_at=1.0),
CLBNode.from_node_json(1, node12),
CLBNode.from_node_json(2, node21),
assoc_obj(CLBNode.from_node_json(2, node22), drained_at=2.0),
],
)
def get_clb_contents():
"""Get Rackspace Cloud Load Balancer contents as list of `CLBNode`."""
# If we get a CLBNotFoundError while fetching feeds, we should throw away
# all nodes related to that load balancer, because we don't want to act on
# data that we know is invalid/outdated (for example, if we can't fetch a
# feed because CLB was deleted, we don't want to say that we have a node in
# DRAINING with draining time of 0; we should just say that the node is
# gone).
def gone(r):
return catch(CLBNotFoundError, lambda exc: r)
lb_ids = [lb['id'] for lb in (yield _retry(get_clbs()))]
node_reqs = [
_retry(get_clb_nodes(lb_id).on(error=gone([]))) for lb_id in lb_ids
]
all_nodes = yield parallel(node_reqs)
lb_nodes = {
lb_id: [CLBNode.from_node_json(lb_id, node) for node in nodes]
for lb_id, nodes in zip(lb_ids, all_nodes)
}
draining = [
n for n in concat(lb_nodes.values())
if n.description.condition == CLBNodeCondition.DRAINING
]
feeds = yield parallel([
_retry(
get_clb_node_feed(n.description.lb_id,
n.node_id).on(error=gone(None)))
for n in draining
])
nodes_to_feeds = dict(zip(draining, feeds))
deleted_lbs = set([
node.description.lb_id for (node, feed) in nodes_to_feeds.items()
if feed is None
])
def update_drained_at(node):
feed = nodes_to_feeds.get(node)
if node.description.lb_id in deleted_lbs:
return None
if feed is not None:
return assoc_obj(node, drained_at=extract_CLB_drained_at(feed))
else:
return node
nodes = map(update_drained_at, concat(lb_nodes.values()))
yield do_return(list(filter(bool, nodes)))
def test_lb_disappeared_during_feed_fetch(self):
"""
If a load balancer gets deleted while fetching feeds, no nodes will be
returned for it.
"""
node21 = node("21", "a21", condition="DRAINING", weight=None)
seq = [
lb_req("loadbalancers", True, {"loadBalancers": [{"id": 1}, {"id": 2}]}),
parallel_sequence(
[[nodes_req(1, [node("11", "a11", condition="DRAINING"), node("12", "a12")])], [nodes_req(2, [node21])]]
),
parallel_sequence(
[[node_feed_req(1, "11", CLBNotFoundError(lb_id=u"1"))], [node_feed_req(2, "21", "22feed")]]
),
]
eff = get_clb_contents()
self.assertEqual(perform_sequence(seq, eff), [assoc_obj(CLBNode.from_node_json(2, node21), drained_at=2.0)])
def get_clb_contents():
"""Get Rackspace Cloud Load Balancer contents as list of `CLBNode`."""
# If we get a CLBNotFoundError while fetching feeds, we should throw away
# all nodes related to that load balancer, because we don't want to act on
# data that we know is invalid/outdated (for example, if we can't fetch a
# feed because CLB was deleted, we don't want to say that we have a node in
# DRAINING with draining time of 0; we should just say that the node is
# gone).
def gone(r):
return catch(CLBNotFoundError, lambda exc: r)
lb_ids = [lb['id'] for lb in (yield _retry(get_clbs()))]
node_reqs = [_retry(get_clb_nodes(lb_id).on(error=gone([])))
for lb_id in lb_ids]
all_nodes = yield parallel(node_reqs)
lb_nodes = {lb_id: [CLBNode.from_node_json(lb_id, node) for node in nodes]
for lb_id, nodes in zip(lb_ids, all_nodes)}
draining = [n for n in concat(lb_nodes.values())
if n.description.condition == CLBNodeCondition.DRAINING]
feeds = yield parallel(
[_retry(get_clb_node_feed(n.description.lb_id, n.node_id).on(
error=gone(None)))
for n in draining]
)
nodes_to_feeds = dict(zip(draining, feeds))
deleted_lbs = set([
node.description.lb_id
for (node, feed) in nodes_to_feeds.items() if feed is None])
def update_drained_at(node):
feed = nodes_to_feeds.get(node)
if node.description.lb_id in deleted_lbs:
return None
if feed is not None:
return assoc_obj(node, drained_at=extract_CLB_drained_at(feed))
else:
return node
nodes = map(update_drained_at, concat(lb_nodes.values()))
yield do_return(list(filter(bool, nodes)))
def get_clb_contents():
"""
Get Rackspace Cloud Load Balancer contents as list of `CLBNode`. CLB
health monitor information is also returned as a pmap of :obj:`CLB` objects
mapped on LB ID.
:return: Effect of (``list`` of :obj:`CLBNode`, `pmap` of :obj:`CLB`)
:rtype: :obj:`Effect`
"""
# If we get a CLBNotFoundError while fetching feeds, we should throw away
# all nodes related to that load balancer, because we don't want to act on
# data that we know is invalid/outdated (for example, if we can't fetch a
# feed because CLB was deleted, we don't want to say that we have a node in
# DRAINING with draining time of 0; we should just say that the node is
# gone).
def gone(r):
return catch(CLBNotFoundError, lambda exc: r)
lb_ids = [lb['id'] for lb in (yield _retry(get_clbs()))]
node_reqs = [
_retry(get_clb_nodes(lb_id).on(error=gone([]))) for lb_id in lb_ids
]
healthmon_reqs = [
_retry(get_clb_health_monitor(lb_id).on(error=gone(None)))
for lb_id in lb_ids
]
all_nodes_hms = yield parallel(node_reqs + healthmon_reqs)
all_nodes, hms = all_nodes_hms[:len(lb_ids)], all_nodes_hms[len(lb_ids):]
lb_nodes = {
lb_id: [CLBNode.from_node_json(lb_id, node) for node in nodes]
for lb_id, nodes in zip(lb_ids, all_nodes)
}
clbs = {
str(lb_id): CLB(bool(health_mon))
for lb_id, health_mon in zip(lb_ids, hms) if health_mon is not None
}
draining = [
n for n in concat(lb_nodes.values())
if n.description.condition == CLBNodeCondition.DRAINING
]
feeds = yield parallel([
_retry(
get_clb_node_feed(n.description.lb_id,
n.node_id).on(error=gone(None)))
for n in draining
])
nodes_to_feeds = dict(zip(draining, feeds))
deleted_lbs = set([
node.description.lb_id for (node, feed) in nodes_to_feeds.items()
if feed is None
])
def update_drained_at(node):
feed = nodes_to_feeds.get(node)
if node.description.lb_id in deleted_lbs:
return None
if feed is not None:
node.drained_at = extract_clb_drained_at(feed)
return node
nodes = map(update_drained_at, concat(lb_nodes.values()))
yield do_return((list(filter(bool, nodes)),
pmap(keyfilter(lambda k: k not in deleted_lbs, clbs))))
def test_active_if_node_is_enabled(self):
"""
If the node is ENABLED, :func:`CLBNode.is_active` returns `True`.
"""
node = CLBNode(node_id="1234", description=self.desc, address="10.1.1.1", drained_at=0.0, connections=1)
self.assertTrue(node.is_active())