mirror of
https://github.com/outbackdingo/patroni.git
synced 2026-08-25 14:53:37 +00:00
Alexander KukushkinandGitHub
038b5aed72
Previously replicas were always watching for leader key (even if the postgres was not in the running there). It was not a big issue, but it was not possible to interrupt such watch in cases if the postgres started up or stopped successfully. Also it was delaying update_member call and we had kind of stale information in DCS up to `loop_wait` seconds. This commit changes such behavior. If the async_executor is busy by starting/stopping or restarting postgres we will not watch for leader key but waiting for event from async_executor up to `loop_wait` seconds. Async executor will fire such event only in case if the function it was calling returned something what could be evaluated to boolean True. Such functionality is really needed to change the way how we are making decision about necessity of pg_rewind. It will require to have a local postgres running and for us it is really important to get such notification as soon as possible.
330 lines
13 KiB
Python
330 lines
13 KiB
Python
import datetime
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import json
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import psycopg2
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import unittest
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from mock import Mock, patch
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from patroni.api import RestApiHandler, RestApiServer
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from patroni.dcs import ClusterConfig, Member
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from patroni.utils import tzutc
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from six import BytesIO as IO
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from six.moves import BaseHTTPServer
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from test_postgresql import psycopg2_connect, MockCursor
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future_restart_time = datetime.datetime.now(tzutc) + datetime.timedelta(days=5)
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postmaster_start_time = datetime.datetime.now(tzutc)
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class MockPostgresql(object):
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name = 'test'
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state = 'running'
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role = 'master'
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server_version = '999999'
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sysid = 'dummysysid'
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scope = 'dummy'
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pending_restart = True
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@staticmethod
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def connection():
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return psycopg2_connect()
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@staticmethod
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def postmaster_start_time():
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return str(postmaster_start_time)
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class MockHa(object):
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state_handler = MockPostgresql()
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@staticmethod
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def reinitialize():
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return 'reinitialize'
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@staticmethod
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def restart():
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return (True, '')
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@staticmethod
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def restart_scheduled():
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return False
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@staticmethod
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def delete_future_restart():
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return True
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@staticmethod
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def fetch_nodes_statuses(members):
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return [[None, True, None, None, {}]]
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@staticmethod
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def schedule_future_restart(data):
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return True
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@staticmethod
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def get_effective_tags():
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return {'nosync': True}
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@staticmethod
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def wakeup():
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pass
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class MockPatroni(object):
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ha = MockHa()
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config = Mock()
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postgresql = ha.state_handler
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dcs = Mock()
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tags = {}
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version = '0.00'
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noloadbalance = Mock(return_value=False)
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scheduled_restart = {'schedule': future_restart_time,
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'postmaster_start_time': postgresql.postmaster_start_time()}
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@staticmethod
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def sighup_handler():
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pass
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class MockRequest(object):
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def __init__(self, request):
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self.request = request.encode('utf-8')
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def makefile(self, *args, **kwargs):
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return IO(self.request)
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class MockRestApiServer(RestApiServer):
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def __init__(self, Handler, request):
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self.socket = 0
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self.serve_forever = Mock()
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BaseHTTPServer.HTTPServer.__init__ = Mock()
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MockRestApiServer._BaseServer__is_shut_down = Mock()
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MockRestApiServer._BaseServer__shutdown_request = True
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config = {'listen': '127.0.0.1:8008', 'auth': 'test:test'}
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super(MockRestApiServer, self).__init__(MockPatroni(), config)
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config['certfile'] = 'dumb'
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self.reload_config(config)
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Handler(MockRequest(request), ('0.0.0.0', 8080), self)
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@patch('ssl.wrap_socket', Mock(return_value=0))
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class TestRestApiHandler(unittest.TestCase):
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_authorization = '\nAuthorization: Basic dGVzdDp0ZXN0'
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def test_do_GET(self):
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MockRestApiServer(RestApiHandler, 'GET /replica')
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with patch.object(RestApiHandler, 'get_postgresql_status', Mock(return_value={})):
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MockRestApiServer(RestApiHandler, 'GET /replica')
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with patch.object(RestApiHandler, 'get_postgresql_status', Mock(return_value={'role': 'master'})):
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MockRestApiServer(RestApiHandler, 'GET /replica')
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MockRestApiServer(RestApiHandler, 'GET /master')
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MockPatroni.dcs.cluster.leader.name = MockPostgresql.name
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MockRestApiServer(RestApiHandler, 'GET /replica')
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MockPatroni.dcs.cluster = None
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with patch.object(RestApiHandler, 'get_postgresql_status', Mock(return_value={'role': 'master'})):
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MockRestApiServer(RestApiHandler, 'GET /master')
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with patch.object(MockHa, 'restart_scheduled', Mock(return_value=True)):
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MockRestApiServer(RestApiHandler, 'GET /master')
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'GET /master'))
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def test_do_OPTIONS(self):
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'OPTIONS / HTTP/1.0'))
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def test_do_GET_patroni(self):
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'GET /patroni'))
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def test_basicauth(self):
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'POST /restart HTTP/1.0'))
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MockRestApiServer(RestApiHandler, 'POST /restart HTTP/1.0\nAuthorization:')
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@patch.object(MockPatroni, 'dcs')
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def test_do_GET_config(self, mock_dcs):
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mock_dcs.cluster.config.data = {}
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'GET /config'))
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mock_dcs.cluster.config = None
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'GET /config'))
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@patch.object(MockPatroni, 'dcs')
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def test_do_PATCH_config(self, mock_dcs):
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config = {'postgresql': {'use_slots': False, 'use_pg_rewind': True, 'parameters': {'wal_level': 'logical'}}}
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mock_dcs.get_cluster.return_value.config = ClusterConfig.from_node(1, json.dumps(config))
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request = 'PATCH /config HTTP/1.0' + self._authorization
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, request))
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request += '\nContent-Length: '
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, request + '34\n\n{"postgresql":{"use_slots":false}}'))
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config['ttl'] = 5
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config['postgresql'].update({'use_slots': {'foo': True}, "parameters": None})
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config = json.dumps(config)
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request += str(len(config)) + '\n\n' + config
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MockRestApiServer(RestApiHandler, request)
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mock_dcs.set_config_value.return_value = False
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MockRestApiServer(RestApiHandler, request)
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@patch.object(MockPatroni, 'dcs')
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def test_do_PUT_config(self, mock_dcs):
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mock_dcs.get_cluster.return_value.config = ClusterConfig.from_node(1, '{}')
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request = 'PUT /config HTTP/1.0' + self._authorization + '\nContent-Length: '
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, request + '2\n\n{}'))
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config = '{"foo": "bar"}'
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request += str(len(config)) + '\n\n' + config
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MockRestApiServer(RestApiHandler, request)
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mock_dcs.set_config_value.return_value = False
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MockRestApiServer(RestApiHandler, request)
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mock_dcs.get_cluster.return_value.config = ClusterConfig.from_node(1, config)
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MockRestApiServer(RestApiHandler, request)
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@patch.object(MockPatroni, 'sighup_handler', Mock(side_effect=Exception))
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def test_do_POST_reload(self):
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with patch.object(MockPatroni, 'config') as mock_config:
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mock_config.reload_local_configuration.return_value = False
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MockRestApiServer(RestApiHandler, 'POST /reload HTTP/1.0' + self._authorization)
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'POST /reload HTTP/1.0' + self._authorization))
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@patch.object(MockPatroni, 'dcs')
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def test_do_POST_restart(self, mock_dcs):
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mock_dcs.get_cluster.return_value.is_paused.return_value = False
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request = 'POST /restart HTTP/1.0' + self._authorization
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, request))
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with patch.object(MockHa, 'restart', Mock(side_effect=Exception)):
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MockRestApiServer(RestApiHandler, request)
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post = request + '\nContent-Length: '
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def make_request(request=None, **kwargs):
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request = json.dumps(kwargs) if request is None else request
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return '{0}{1}\n\n{2}'.format(post, len(request), request)
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# empty request
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request = make_request('')
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MockRestApiServer(RestApiHandler, request)
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# invalid request
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request = make_request('foobar=baz')
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MockRestApiServer(RestApiHandler, request)
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# wrong role
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request = make_request(schedule=future_restart_time.isoformat(), role='unknown', postgres_version='9.5.3')
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MockRestApiServer(RestApiHandler, request)
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# wrong version
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request = make_request(schedule=future_restart_time.isoformat(), role='master', postgres_version='9.5.3.1')
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MockRestApiServer(RestApiHandler, request)
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# unknown filter
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request = make_request(schedule=future_restart_time.isoformat(), batman='lives')
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MockRestApiServer(RestApiHandler, request)
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# incorrect schedule
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request = make_request(schedule='2016-08-42 12:45TZ+1', role='master')
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MockRestApiServer(RestApiHandler, request)
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# everything fine, but the schedule is missing
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request = make_request(role='master', postgres_version='9.5.2')
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MockRestApiServer(RestApiHandler, request)
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for retval in (True, False):
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with patch.object(MockHa, 'schedule_future_restart', Mock(return_value=retval)):
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request = make_request(schedule=future_restart_time.isoformat())
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MockRestApiServer(RestApiHandler, request)
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with patch.object(MockHa, 'restart', Mock(return_value=(retval, "foo"))):
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request = make_request(role='master', postgres_version='9.5.2')
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MockRestApiServer(RestApiHandler, request)
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mock_dcs.get_cluster.return_value.is_paused.return_value = True
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MockRestApiServer(RestApiHandler, make_request(schedule='2016-08-42 12:45TZ+1', role='master'))
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def test_do_DELETE_restart(self):
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for retval in (True, False):
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with patch.object(MockHa, 'delete_future_restart', Mock(return_value=retval)):
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request = 'DELETE /restart HTTP/1.0' + self._authorization
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, request))
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@patch.object(MockPatroni, 'dcs')
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def test_do_POST_reinitialize(self, mock_dcs):
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cluster = mock_dcs.get_cluster.return_value
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cluster.is_paused.return_value = False
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request = 'POST /reinitialize HTTP/1.0' + self._authorization
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MockRestApiServer(RestApiHandler, request)
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with patch.object(MockHa, 'reinitialize', Mock(return_value=None)):
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MockRestApiServer(RestApiHandler, request)
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@patch('time.sleep', Mock())
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def test_RestApiServer_query(self):
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with patch.object(MockCursor, 'execute', Mock(side_effect=psycopg2.OperationalError)):
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'GET /patroni'))
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with patch.object(MockPostgresql, 'connection', Mock(side_effect=psycopg2.OperationalError)):
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'GET /patroni'))
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@patch('time.sleep', Mock())
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@patch.object(MockPatroni, 'dcs')
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def test_do_POST_failover(self, dcs):
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dcs.loop_wait = 10
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cluster = dcs.get_cluster.return_value
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post = 'POST /failover HTTP/1.0' + self._authorization + '\nContent-Length: '
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MockRestApiServer(RestApiHandler, post + '7\n\n{"1":2}')
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request = post + '0\n\n'
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MockRestApiServer(RestApiHandler, request)
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cluster.leader.name = 'postgresql1'
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MockRestApiServer(RestApiHandler, request)
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MockRestApiServer(RestApiHandler, post + '25\n\n{"leader": "postgresql1"}')
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cluster.leader.name = 'postgresql2'
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request = post + '53\n\n{"leader": "postgresql1", "candidate": "postgresql2"}'
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MockRestApiServer(RestApiHandler, request)
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cluster.leader.name = 'postgresql1'
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MockRestApiServer(RestApiHandler, request)
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cluster.members = [Member(0, 'postgresql0', 30, {'api_url': 'http'}),
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Member(0, 'postgresql2', 30, {'api_url': 'http'})]
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MockRestApiServer(RestApiHandler, request)
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cluster.failover = None
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MockRestApiServer(RestApiHandler, request)
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dcs.get_cluster.side_effect = [cluster]
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MockRestApiServer(RestApiHandler, request)
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cluster2 = cluster.copy()
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cluster2.leader.name = 'postgresql0'
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dcs.get_cluster.side_effect = [cluster, cluster2]
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MockRestApiServer(RestApiHandler, request)
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cluster2.leader.name = 'postgresql2'
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dcs.get_cluster.side_effect = [cluster, cluster2]
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MockRestApiServer(RestApiHandler, request)
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dcs.get_cluster.side_effect = None
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dcs.manual_failover.return_value = False
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MockRestApiServer(RestApiHandler, request)
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dcs.manual_failover.return_value = True
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with patch.object(MockHa, 'fetch_nodes_statuses', Mock(return_value=[])):
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MockRestApiServer(RestApiHandler, request)
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# Valid future date
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request = post + '103\n\n{"leader": "postgresql1", "member": "postgresql2",' +\
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' "scheduled_at": "6016-02-15T18:13:30.568224+01:00"}'
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MockRestApiServer(RestApiHandler, request)
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with patch.object(MockPatroni, 'dcs') as d:
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d.manual_failover.return_value = False
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MockRestApiServer(RestApiHandler, request)
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# Exception: No timezone specified
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request = post + '97\n\n{"leader": "postgresql1", "member": "postgresql2",' +\
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' "scheduled_at": "6016-02-15T18:13:30.568224"}'
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MockRestApiServer(RestApiHandler, request)
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# Exception: Scheduled in the past
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request = post + '103\n\n{"leader": "postgresql1", "member": "postgresql2", "scheduled_at": "'
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MockRestApiServer(RestApiHandler, request + '1016-02-15T18:13:30.568224+01:00"}')
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# Invalid date
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self.assertIsNotNone(MockRestApiServer(RestApiHandler, request + '2010-02-29T18:13:30.568224+01:00"}'))
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