async def test_replica_tries_to_take_over(app):
plugins = setup_plugins(app,
pg_replication_role='replica')
assert app.initialize() == None
plugins.reset_mock()
# if there is no lock owner, we start looping trying to become master
app.master_lock_changed(None)
assert plugins.mock_calls == [call.pg_replication_role(), call.master_lock_changed(None)]
plugins.reset_mock()
from asyncio import sleep as real_sleep
with patch('asyncio.sleep') as sleep:
sleeper = FakeSleeper()
sleep.side_effect = sleeper
# the first thing is to sleep a bit
await sleeper.next()
assert sleeper.log == [3]
assert plugins.mock_calls == []
# takeover attempted
states = [(app.my_id, {'willing': 99.0}), (app.my_id, {'willing': 100.0})]
plugins.dcs_list_state.return_value = states
await sleeper.next()
assert sleeper.log == [3, 3]
assert plugins.mock_calls == [
call.dcs_list_state(),
call.best_replicas([('42', {'willing': 99.0}), ('42', {'willing': 100.0})]),
call.dcs_lock('master')]
async def test_master_unhealthy(app):
plugins = setup_plugins(app, pg_replication_role='master')
app.initialize()
plugins.reset_mock()
app.unhealthy('boom', 'It went Boom', can_be_replica=True)
assert plugins.mock_calls == [
call.dcs_set_state({
'host': '127.0.0.1',
'replication_role': 'master',
'health_problems': {
'boom': {
'reason': 'It went Boom',
'can_be_replica': True
}
}
}),
call.pg_replication_role(),
call.dcs_delete_conn_info(),
]
plugins.reset_mock()
# now we should have _handle_unhealthy_master running
with patch('asyncio.sleep') as sleep, patch(
'zgres.deadman.App._stop') as exit, patch(
'time.sleep') as blocking_sleep:
sleeper = FakeSleeper()
sleep.side_effect = sleeper
exit.side_effect = lambda: sleeper.finish()
# there is no replica, so we just sleep and ping the
# DCS to find a willing replica
states = [iter([])]
plugins.dcs_list_state.side_effect = states
await sleeper.next()
assert plugins.mock_calls == [call.dcs_list_state()]
# we add a willing replica
states = [iter([('other', {'willing': 1})])]
plugins.dcs_list_state.side_effect = states
plugins.reset_mock()
await sleeper.next()
assert plugins.mock_calls == [
call.dcs_list_state(),
call.pg_replication_role(),
call.pg_stop(),
call.dcs_disconnect()
]
async def test_master_unhealthy(app):
plugins = setup_plugins(app,
pg_replication_role='master')
app.initialize()
plugins.reset_mock()
app.unhealthy('boom', 'It went Boom', can_be_replica=True)
assert plugins.mock_calls == [
call.dcs_set_state({
'host': '127.0.0.1',
'replication_role': 'master',
'health_problems': {'boom': {'reason': 'It went Boom', 'can_be_replica': True}}}),
call.pg_replication_role(),
call.dcs_delete_conn_info(),
]
plugins.reset_mock()
# now we should have _handle_unhealthy_master running
with patch('asyncio.sleep') as sleep, patch('zgres.deadman.App._stop') as exit, patch('time.sleep') as blocking_sleep:
sleeper = FakeSleeper()
sleep.side_effect = sleeper
exit.side_effect = lambda : sleeper.finish()
# there is no replica, so we just sleep and ping the
# DCS to find a willing replica
states = [iter([])]
plugins.dcs_list_state.side_effect = states
await sleeper.next()
assert plugins.mock_calls == [call.dcs_list_state()]
# we add a willing replica
states = [iter([('other', {'willing': 1})])]
plugins.dcs_list_state.side_effect = states
plugins.reset_mock()
await sleeper.next()
assert plugins.mock_calls == [
call.dcs_list_state(),
call.pg_replication_role(),
call.pg_stop(),
call.dcs_disconnect()
]
async def test_replica_tries_to_take_over(app):
plugins = setup_plugins(app, pg_replication_role='replica')
assert app.initialize() == None
plugins.reset_mock()
# if there is no lock owner, we start looping trying to become master
app.master_lock_changed(None)
assert plugins.mock_calls == [
call.pg_replication_role(),
call.master_lock_changed(None)
]
plugins.reset_mock()
from asyncio import sleep as real_sleep
with patch('asyncio.sleep') as sleep:
sleeper = FakeSleeper()
sleep.side_effect = sleeper
# the first thing is to sleep a bit
await sleeper.next()
assert sleeper.log == [3]
assert plugins.mock_calls == []
# takeover attempted
states = [(app.my_id, {
'willing': 99.0
}), (app.my_id, {
'willing': 100.0
})]
plugins.dcs_list_state.return_value = states
await sleeper.next()
assert sleeper.log == [3, 3]
assert plugins.mock_calls == [
call.dcs_list_state(),
call.best_replicas([('42', {
'willing': 99.0
}), ('42', {
'willing': 100.0
})]),
call.dcs_lock('master')
]
