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import struct
import pytest
import six
from twisted.internet import defer, reactor
import consul
import consul.twisted
Check = consul.Check
def sleep(seconds):
"""
An asynchronous sleep function using twsited. Source:
http://twistedmatrix.com/pipermail/twisted-python/2009-October/020788.html
:type seconds: float
"""
d = defer.Deferred()
reactor.callLater(seconds, d.callback, seconds)
return d
class TestConsul(object):
@pytest.inlineCallbacks
def test_kv(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
index, data = yield c.kv.get('foo')
assert data is None
response = yield c.kv.put('foo', 'bar')
assert response is True
index, data = yield c.kv.get('foo')
assert data['Value'] == six.b('bar')
@pytest.inlineCallbacks
def test_kv_binary(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
yield c.kv.put('foo', struct.pack('i', 1000))
index, data = yield c.kv.get('foo')
assert struct.unpack('i', data['Value']) == (1000,)
@pytest.inlineCallbacks
def test_kv_missing(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
reactor.callLater(2.0 / 100, c.kv.put, 'foo', 'bar')
yield c.kv.put('index', 'bump')
index, data = yield c.kv.get('foo')
assert data is None
index, data = yield c.kv.get('foo', index=index)
assert data['Value'] == six.b('bar')
@pytest.inlineCallbacks
def test_kv_put_flags(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
yield c.kv.put('foo', 'bar')
index, data = yield c.kv.get('foo')
assert data['Flags'] == 0
response = yield c.kv.put('foo', 'bar', flags=50)
assert response is True
index, data = yield c.kv.get('foo')
assert data['Flags'] == 50
@pytest.inlineCallbacks
def test_kv_delete(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
yield c.kv.put('foo1', '1')
yield c.kv.put('foo2', '2')
yield c.kv.put('foo3', '3')
index, data = yield c.kv.get('foo', recurse=True)
assert [x['Key'] for x in data] == ['foo1', 'foo2', 'foo3']
response = yield c.kv.delete('foo2')
assert response is True
index, data = yield c.kv.get('foo', recurse=True)
assert [x['Key'] for x in data] == ['foo1', 'foo3']
response = yield c.kv.delete('foo', recurse=True)
assert response is True
index, data = yield c.kv.get('foo', recurse=True)
assert data is None
@pytest.inlineCallbacks
def test_kv_subscribe(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
@defer.inlineCallbacks
def put():
response = yield c.kv.put('foo', 'bar')
assert response is True
reactor.callLater(1.0 / 100, put)
index, data = yield c.kv.get('foo')
assert data is None
index, data = yield c.kv.get('foo', index=index)
assert data['Value'] == six.b('bar')
@pytest.inlineCallbacks
def test_agent_services(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
services = yield c.agent.services()
del services['consul']
assert services == {}
response = yield c.agent.service.register('foo')
assert response is True
services = yield c.agent.services()
del services['consul']
assert services == {
'foo': {
'Port': 0,
'ID': 'foo',
'CreateIndex': 0,
'ModifyIndex': 0,
'EnableTagOverride': False,
'Service': 'foo',
'Tags': None,
'Address': ''}
}
response = yield c.agent.service.deregister('foo')
assert response is True
services = yield c.agent.services()
del services['consul']
assert services == {}
@pytest.inlineCallbacks
def test_catalog(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
@defer.inlineCallbacks
def register():
response = yield c.catalog.register('n1', '10.1.10.11')
assert response is True
yield sleep(50 / 1000.0)
response = yield c.catalog.deregister('n1')
assert response is True
reactor.callLater(1.0 / 100, register)
index, nodes = yield c.catalog.nodes()
assert len(nodes) == 1
current = nodes[0]
index, nodes = yield c.catalog.nodes(index=index)
nodes.remove(current)
assert [x['Node'] for x in nodes] == ['n1']
index, nodes = yield c.catalog.nodes(index=index)
nodes.remove(current)
assert [x['Node'] for x in nodes] == []
@pytest.inlineCallbacks
def test_health_service(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
# check there are no nodes for the service 'foo'
index, nodes = yield c.health.service('foo')
assert nodes == []
# register two nodes, one with a long ttl, the other shorter
yield c.agent.service.register(
'foo', service_id='foo:1', check=Check.ttl('10s'))
yield c.agent.service.register(
'foo', service_id='foo:2', check=Check.ttl('100ms'))
yield sleep(1.0)
# check the nodes show for the /health/service endpoint
index, nodes = yield c.health.service('foo')
assert [node['Service']['ID'] for node in nodes] == \
['foo:1', 'foo:2']
# but that they aren't passing their health check
index, nodes = yield c.health.service('foo', passing=True)
assert nodes == []
# ping the two node's health check
yield c.agent.check.ttl_pass('service:foo:1')
yield c.agent.check.ttl_pass('service:foo:2')
yield sleep(0.05)
# both nodes are now available
index, nodes = yield c.health.service('foo', passing=True)
assert [node['Service']['ID'] for node in nodes] == \
['foo:1', 'foo:2']
# wait until the short ttl node fails
yield sleep(0.5)
# only one node available
index, nodes = yield c.health.service('foo', passing=True)
assert [node['Service']['ID'] for node in nodes] == ['foo:1']
# ping the failed node's health check
yield c.agent.check.ttl_pass('service:foo:2')
yield sleep(0.05)
# check both nodes are available
index, nodes = yield c.health.service('foo', passing=True)
assert [node['Service']['ID'] for node in nodes] == \
['foo:1', 'foo:2']
# deregister the nodes
yield c.agent.service.deregister('foo:1')
yield c.agent.service.deregister('foo:2')
yield sleep(2)
index, nodes = yield c.health.service('foo')
assert nodes == []
@pytest.inlineCallbacks
def test_health_service_subscribe(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
class Config(object):
def __init__(self):
self.nodes = []
self.index = None
@defer.inlineCallbacks
def update(self):
self.index, nodes = yield c.health.service(
'foo', index=None, passing=True)
self.nodes = [node['Service']['ID'] for node in nodes]
config = Config()
yield c.agent.service.register(
'foo', service_id='foo:1', check=Check.ttl('40ms'))
yield config.update()
assert config.nodes == []
# ping the service's health check
yield c.agent.check.ttl_pass('service:foo:1')
yield config.update()
assert config.nodes == ['foo:1']
# the service should fail
yield sleep(0.8)
yield config.update()
assert config.nodes == []
yield c.agent.service.deregister('foo:1')
@pytest.inlineCallbacks
def test_session(self, consul_port):
c = consul.twisted.Consul(port=consul_port)
index, services = yield c.session.list()
assert services == []
session_id = yield c.session.create()
index, services = yield c.session.list(index=index)
assert len(services)
response = yield c.session.destroy(session_id)
assert response is True
index, services = yield c.session.list(index=index)
assert services == []
@pytest.inlineCallbacks
def test_acl(self, acl_consul):
c = consul.twisted.Consul(
port=acl_consul.port, token=acl_consul.token)
rules = """
key "" {
policy = "read"
}
key "private/" {
policy = "deny"
}
"""
token = yield c.acl.create(rules=rules)
raised = False
try:
yield c.acl.list(token=token)
except consul.ACLPermissionDenied:
raised = True
assert raised
destroyed = yield c.acl.destroy(token)
assert destroyed is True
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