mirror of
https://github.com/outbackdingo/patroni.git
synced 2026-08-25 14:53:37 +00:00
Alexander Kukushkin
c913c8ad92
This method behaves differently depending on server version and will allow to use patroni with postgres older than 9.3
224 lines
7.3 KiB
Python
224 lines
7.3 KiB
Python
import os
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import psycopg2
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import shutil
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import subprocess
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import unittest
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from helpers.dcs import Cluster, Member
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from helpers.postgresql import Postgresql
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def nop(*args, **kwargs):
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pass
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def subprocess_call(cmd, shell=False, env=None):
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return 0
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def false(*args, **kwargs):
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return False
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class MockCursor:
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_count = 0
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def __init__(self):
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self.closed = False
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self.results = []
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def execute(self, sql, *params):
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MockCursor._count += 1
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if sql.startswith('blabla'):
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raise psycopg2.OperationalError()
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elif sql.startswith('InterfaceError'):
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raise psycopg2.InterfaceError()
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elif sql.startswith('SELECT slot_name'):
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self.results = [('blabla',), ('foobar',)]
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elif sql.startswith('SELECT pg_current_xlog_location()'):
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self.results = [(0,)]
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elif sql.startswith('SELECT pg_is_in_recovery(), COALESCE'):
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if MockCursor._count == 1:
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raise psycopg2.OperationalError()
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elif MockCursor._count == 2:
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self.results = [(True, '0/1')]
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else:
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self.results = [(False, '0/1')]
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elif sql.startswith('SELECT CASE WHEN pg_is_in_recovery()'):
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self.results = [('0/0', )]
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elif sql.startswith('SELECT pg_is_in_recovery()'):
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self.results = [(False, )]
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elif sql.startswith('SELECT to_char(pg_postmaster_start_time'):
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self.results = [('', True, '', '', '', False)]
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else:
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self.results = [(
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None,
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None,
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None,
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None,
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None,
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None,
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None,
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None,
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None,
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None,
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)]
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def fetchone(self):
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return self.results[0]
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def close(self):
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pass
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def __iter__(self):
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for i in self.results:
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yield i
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class MockConnect:
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def __init__(self):
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self.autocommit = False
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self.closed = 0
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self.server_version = 90400
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def cursor(self):
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return MockCursor()
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def close(self):
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pass
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def psycopg2_connect(*args, **kwargs):
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return MockConnect()
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def is_running():
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return False
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class TestPostgresql(unittest.TestCase):
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def __init__(self, method_name='runTest'):
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self.setUp = self.set_up
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self.tearDown = self.tear_down
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super(TestPostgresql, self).__init__(method_name)
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def set_up(self):
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subprocess.call = subprocess_call
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shutil.copy = nop
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self.p = Postgresql({'name': 'test0', 'scope': 'batman', 'data_dir': 'data/test0',
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'listen': '127.0.0.1, *:5432', 'connect_address': '127.0.0.2:5432',
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'pg_hba': ['hostssl all all 0.0.0.0/0 md5', 'host all all 0.0.0.0/0 md5'],
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'superuser': {'password': ''},
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'admin': {'username': 'admin', 'password': 'admin'},
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'replication': {'username': 'replicator',
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'password': 'rep-pass',
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'network': '127.0.0.1/32'},
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'parameters': {'foo': 'bar'}, 'recovery_conf': {'foo': 'bar'},
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'callbacks': {'on_start': 'true', 'on_stop': 'true',
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'on_restart': 'true', 'on_role_change': 'true',
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'on_reload': 'true'
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},
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'restore': 'true'})
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psycopg2.connect = psycopg2_connect
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if not os.path.exists(self.p.data_dir):
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os.makedirs(self.p.data_dir)
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self.leader = Member(0, 'leader', 'postgres://replicator:[email protected]:5435/postgres', None, None, 28)
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self.other = Member(0, 'test1', 'postgres://replicator:[email protected]:5433/postgres', None, None, 28)
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self.me = Member(0, 'test0', 'postgres://replicator:[email protected]:5434/postgres', None, None, 28)
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def tear_down(self):
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shutil.rmtree('data')
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def mock_query(self, p):
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raise psycopg2.OperationalError("not supported")
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def test_data_directory_empty(self):
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self.assertTrue(self.p.data_directory_empty())
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def test_initialize(self):
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self.assertTrue(self.p.initialize())
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self.assertTrue(os.path.exists(os.path.join(self.p.data_dir, 'pg_hba.conf')))
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def test_start_stop(self):
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self.assertFalse(self.p.start())
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self.p.is_running = is_running
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with open(os.path.join(self.p.data_dir, 'postmaster.pid'), 'w'):
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pass
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self.assertTrue(self.p.start())
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self.assertTrue(self.p.stop())
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def test_sync_from_leader(self):
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self.assertTrue(self.p.sync_from_leader(self.leader))
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def test_follow_the_leader(self):
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self.p.demote(self.leader)
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self.p.follow_the_leader(None)
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self.p.demote(self.leader)
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self.p.follow_the_leader(self.leader)
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self.p.follow_the_leader(self.other)
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def test_create_connection_users(self):
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cfg = self.p.config
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cfg['superuser']['username'] = 'test'
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p = Postgresql(cfg)
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p.create_connection_users()
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def test_create_replication_slots(self):
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self.p.start()
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cluster = Cluster(True, self.leader, 0, [self.me, self.other, self.leader])
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self.p.create_replication_slots(cluster)
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def test_query(self):
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self.p.query('select 1')
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self.assertRaises(psycopg2.InterfaceError, self.p.query, 'InterfaceError')
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self.assertRaises(psycopg2.OperationalError, self.p.query, 'blabla')
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self.p._connection.closed = 2
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self.assertRaises(psycopg2.OperationalError, self.p.query, 'blabla')
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self.p._connection.closed = 2
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self.p.disconnect = false
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self.assertRaises(psycopg2.OperationalError, self.p.query, 'blabla')
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def test_is_healthiest_node(self):
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cluster = Cluster(True, self.leader, 0, [self.me, self.other, self.leader])
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self.assertTrue(self.p.is_healthiest_node(cluster))
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self.p.is_leader = false
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MockCursor._count = 0
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self.assertFalse(self.p.is_healthiest_node(cluster))
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MockCursor._count = 0
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self.p.xlog_position = lambda: 1
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self.assertTrue(self.p.is_healthiest_node(cluster))
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self.p.xlog_position = lambda: 2
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self.assertFalse(self.p.is_healthiest_node(cluster))
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self.p.config['maximum_lag_on_failover'] = -3
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self.assertFalse(self.p.is_healthiest_node(cluster))
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def test_is_leader(self):
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self.p.is_promoted = True
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self.assertTrue(self.p.is_leader())
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self.assertFalse(self.p.is_promoted)
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def test_reload(self):
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self.assertTrue(self.p.reload())
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def test_is_healthy(self):
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self.assertTrue(self.p.is_healthy())
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self.p.is_running = is_running
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self.assertFalse(self.p.is_healthy())
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def test_promote(self):
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self.assertTrue(self.p.promote())
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def test_last_operation(self):
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self.assertEquals(self.p.last_operation(), '0')
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def test_non_existing_callback(self):
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self.assertFalse(self.p.call_nowait('foobar'))
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def test_is_leader_exception(self):
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self.p.start()
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self.p.query = self.mock_query
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self.assertTrue(self.p.stop())
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