patroni/tests/test_ctl.py

import click
import etcd
import mock
import os
import unittest

from click.testing import CliRunner
from datetime import datetime, timedelta
from mock import patch, Mock, PropertyMock
from patroni import global_config
from patroni.ctl import ctl, load_config, output_members, get_dcs, parse_dcs, \
    get_all_members, get_any_member, get_cursor, query_member, PatroniCtlException, apply_config_changes, \
    format_config_for_editing, show_diff, invoke_editor, format_pg_version, CONFIG_FILE_PATH, PatronictlPrettyTable
from patroni.dcs import Cluster, Failover
from patroni.postgresql.config import get_param_diff
from patroni.postgresql.mpp import get_mpp
from patroni.psycopg import OperationalError
from patroni.utils import tzutc
from prettytable import PrettyTable, ALL
from urllib3 import PoolManager

from . import MockConnect, MockCursor, MockResponse, psycopg_connect
from .test_etcd import etcd_read, socket_getaddrinfo
from .test_ha import get_cluster_initialized_without_leader, get_cluster_initialized_with_leader, \
    get_cluster_initialized_with_only_leader, get_cluster_not_initialized_without_leader, get_cluster, Member


def get_default_config(*args):
    return {
        'scope': 'alpha',
        'restapi': {'listen': '::', 'certfile': 'a'},
        'ctl': {'certfile': 'a'},
        'etcd': {'host': 'localhost:2379', 'retry_timeout': 10, 'ttl': 30},
        'citus': {'database': 'citus', 'group': 0},
        'postgresql': {'data_dir': '.', 'pgpass': './pgpass', 'parameters': {}, 'retry_timeout': 5}
    }


@patch.object(PoolManager, 'request', Mock(return_value=MockResponse()))
@patch('patroni.ctl.load_config', get_default_config)
@patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_with_leader()))
class TestCtl(unittest.TestCase):
    TEST_ROLES = ('master', 'primary', 'leader')

    @patch('socket.getaddrinfo', socket_getaddrinfo)
    def setUp(self):
        self.runner = CliRunner()

    @patch('patroni.ctl.logging.debug')
    def test_load_config(self, mock_logger_debug):
        runner = CliRunner()
        with runner.isolated_filesystem():
            self.assertRaises(PatroniCtlException, load_config, './non-existing-config-file', None)

        with patch('os.path.exists', Mock(return_value=True)), \
                patch('patroni.config.Config._load_config_path', Mock(return_value={})):
            load_config(CONFIG_FILE_PATH, None)
            mock_logger_debug.assert_called_once()
            self.assertEqual(('Ignoring configuration file "%s". It does not exists or is not readable.',
                              CONFIG_FILE_PATH),
                             mock_logger_debug.call_args[0])
            mock_logger_debug.reset_mock()

            with patch('os.access', Mock(return_value=True)):
                load_config(CONFIG_FILE_PATH, '')
                mock_logger_debug.assert_called_once()
                self.assertEqual(('Loading configuration from file %s', CONFIG_FILE_PATH),
                                 mock_logger_debug.call_args[0])
                mock_logger_debug.reset_mock()

    @patch('patroni.psycopg.connect', psycopg_connect)
    def test_get_cursor(self):
        with click.Context(click.Command('query')) as ctx:
            ctx.obj = {'__config': {}, '__mpp': get_mpp({})}
            for role in self.TEST_ROLES:
                self.assertIsNone(get_cursor(get_cluster_initialized_without_leader(), None, {}, role=role))
                self.assertIsNotNone(get_cursor(get_cluster_initialized_with_leader(), None, {}, role=role))

            # MockCursor returns pg_is_in_recovery as false
            self.assertIsNone(get_cursor(get_cluster_initialized_with_leader(), None, {}, role='replica'))

            self.assertIsNotNone(get_cursor(get_cluster_initialized_with_leader(), None, {'dbname': 'foo'}, role='any'))

            # Mutually exclusive options
            with self.assertRaises(PatroniCtlException) as e:
                get_cursor(get_cluster_initialized_with_leader(), None, {'dbname': 'foo'}, member_name='other',
                           role='replica')

            self.assertEqual(str(e.exception), '--role and --member are mutually exclusive options')

            # Invalid member provided
            self.assertIsNone(get_cursor(get_cluster_initialized_with_leader(), None, {'dbname': 'foo'},
                                         member_name='invalid'))

            # Valid member provided
            self.assertIsNotNone(get_cursor(get_cluster_initialized_with_leader(), None, {'dbname': 'foo'},
                                            member_name='other'))

    def test_parse_dcs(self):
        assert parse_dcs(None) is None
        assert parse_dcs('localhost') == {'etcd': {'host': 'localhost:2379'}}
        assert parse_dcs('') == {'etcd': {'host': 'localhost:2379'}}
        assert parse_dcs('localhost:8500') == {'consul': {'host': 'localhost:8500'}}
        assert parse_dcs('zookeeper://localhost') == {'zookeeper': {'hosts': ['localhost:2181']}}
        assert parse_dcs('exhibitor://dummy') == {'exhibitor': {'hosts': ['dummy'], 'port': 8181}}
        assert parse_dcs('consul://localhost') == {'consul': {'host': 'localhost:8500'}}
        assert parse_dcs('etcd3://random.com:2399') == {'etcd3': {'host': 'random.com:2399'}}
        self.assertRaises(PatroniCtlException, parse_dcs, 'invalid://test')

    def test_output_members(self):
        with click.Context(click.Command('list')) as ctx:
            ctx.obj = {'__config': {}, '__mpp': get_mpp({})}
            scheduled_at = datetime.now(tzutc) + timedelta(seconds=600)
            cluster = get_cluster_initialized_with_leader(Failover(1, 'foo', 'bar', scheduled_at))
            del cluster.members[1].data['conn_url']
            for fmt in ('pretty', 'json', 'yaml', 'topology'):
                self.assertIsNone(output_members(cluster, name='abc', fmt=fmt))

            with patch('click.echo') as mock_echo:
                self.assertIsNone(output_members(cluster, name='abc', fmt='tsv'))
                self.assertEqual(mock_echo.call_args[0][0], 'abc\tother\t\tReplica\trunning\t\tunknown')

    @patch('patroni.dcs.AbstractDCS.set_failover_value', Mock())
    def test_switchover(self):
        # Confirm
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
        self.assertEqual(result.exit_code, 0)

        # Abort
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\nN')
        self.assertEqual(result.exit_code, 1)

        # Without a candidate with --force option
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0', '--force'])
        self.assertEqual(result.exit_code, 0)

        # Scheduled (confirm)
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'],
                                    input='leader\nother\n2300-01-01T12:23:00\ny')
        self.assertEqual(result.exit_code, 0)

        # Scheduled (abort)
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0',
                                    '--scheduled', '2015-01-01T12:00:00+01:00'], input='leader\nother\n\nN')
        self.assertEqual(result.exit_code, 1)

        # Scheduled with --force option
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0',
                                    '--force', '--scheduled', '2015-01-01T12:00:00+01:00'])
        self.assertEqual(result.exit_code, 0)

        # Scheduled in pause mode
        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
            result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0',
                                              '--force', '--scheduled', '2015-01-01T12:00:00'])
            self.assertEqual(result.exit_code, 1)
            self.assertIn("Can't schedule switchover in the paused state", result.output)

        # Target and source are equal
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nleader\n\ny')
        self.assertEqual(result.exit_code, 1)
        self.assertIn("Candidate ['other']", result.output)
        self.assertIn('Member leader is already the leader of cluster dummy', result.output)

        # Candidate is not a member of the cluster
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nReality\n\ny')
        self.assertEqual(result.exit_code, 1)
        self.assertIn('Member Reality does not exist in cluster dummy or is tagged as nofailover', result.output)

        # Invalid timestamp
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0', '--force', '--scheduled', 'invalid'])
        self.assertEqual(result.exit_code, 1)
        self.assertIn('Unable to parse scheduled timestamp', result.output)

        # Invalid timestamp
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0',
                                          '--force', '--scheduled', '2115-02-30T12:00:00+01:00'])
        self.assertEqual(result.exit_code, 1)
        self.assertIn('Unable to parse scheduled timestamp', result.output)

        # Specifying wrong leader
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='dummy')
        self.assertEqual(result.exit_code, 1)
        self.assertIn('Member dummy is not the leader of cluster dummy', result.output)

        # Errors while sending Patroni REST API request
        with patch('patroni.ctl.request_patroni', Mock(side_effect=Exception)):
            result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'],
                                        input='leader\nother\n2300-01-01T12:23:00\ny')
            self.assertIn('falling back to DCS', result.output)

        with patch('patroni.ctl.request_patroni') as mock_api_request:
            mock_api_request.return_value.status = 500
            result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
            self.assertIn('Switchover failed', result.output)

            mock_api_request.return_value.status = 501
            mock_api_request.return_value.data = b'Server does not support this operation'
            result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
            self.assertIn('Switchover failed', result.output)

        # No members available
        with patch('patroni.dcs.AbstractDCS.get_cluster',
                   Mock(return_value=get_cluster_initialized_with_only_leader())):
            result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
            self.assertEqual(result.exit_code, 1)
            self.assertIn('No candidates found to switchover to', result.output)

        # No leader available
        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_without_leader())):
            result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
            self.assertEqual(result.exit_code, 1)
            self.assertIn('This cluster has no leader', result.output)

        # Citus cluster, no group number specified
        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--force'], input='\n')
        self.assertEqual(result.exit_code, 1)
        self.assertIn('For Citus clusters the --group must me specified', result.output)

    @patch('patroni.dcs.AbstractDCS.set_failover_value', Mock())
    def test_failover(self):
        # No candidate specified
        result = self.runner.invoke(ctl, ['failover', 'dummy'], input='0\n')
        self.assertIn('Failover could be performed only to a specific candidate', result.output)

        # Candidate is the same as the leader
        result = self.runner.invoke(ctl, ['failover', 'dummy', '--group', '0'], input='leader\n')
        self.assertIn("Candidate ['other']", result.output)
        self.assertIn('Member leader is already the leader of cluster dummy', result.output)

        # Temp test to check a fallback to switchover if leader is specified
        with patch('patroni.ctl._do_failover_or_switchover') as failover_func_mock:
            result = self.runner.invoke(ctl, ['failover', '--leader', 'leader', 'dummy'], input='0\n')
            self.assertIn('Supplying a leader name using this command is deprecated', result.output)
            failover_func_mock.assert_called_once_with('switchover', 'dummy', None, 'leader', None, False)

        cluster = get_cluster_initialized_with_leader(sync=('leader', 'other'))
        cluster.members.append(Member(0, 'async', 28, {'api_url': 'http://127.0.0.1:8012/patroni'}))
        cluster.config.data['synchronous_mode'] = True
        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=cluster)):
            # Failover to an async member in sync mode (confirm)
            result = self.runner.invoke(ctl,
                                        ['failover', 'dummy', '--group', '0', '--candidate', 'async'], input='y\ny')
            self.assertIn('Are you sure you want to failover to the asynchronous node async', result.output)
            self.assertEqual(result.exit_code, 0)

            # Failover to an async member in sync mode (abort)
            result = self.runner.invoke(ctl, ['failover', 'dummy', '--group', '0', '--candidate', 'async'], input='N')
            self.assertEqual(result.exit_code, 1)
            self.assertIn('Aborting failover', result.output)

    @patch('patroni.dynamic_loader.iter_modules', Mock(return_value=['patroni.dcs.dummy', 'patroni.dcs.etcd']))
    def test_get_dcs(self):
        with click.Context(click.Command('list')) as ctx:
            ctx.obj = {'__config': {'dummy': {}}, '__mpp': get_mpp({})}
            self.assertRaises(PatroniCtlException, get_dcs, 'dummy', 0)

    @patch('patroni.psycopg.connect', psycopg_connect)
    @patch('patroni.ctl.query_member', Mock(return_value=([['mock column']], None)))
    @patch.object(etcd.Client, 'read', etcd_read)
    def test_query(self):
        # Mutually exclusive
        for role in self.TEST_ROLES:
            result = self.runner.invoke(ctl, ['query', 'alpha', '--member', 'abc', '--role', role])
            assert result.exit_code == 1

        with self.runner.isolated_filesystem():
            with open('dummy', 'w') as dummy_file:
                dummy_file.write('SELECT 1')

            # Mutually exclusive
            result = self.runner.invoke(ctl, ['query', 'alpha', '--file', 'dummy', '--command', 'dummy'])
            assert result.exit_code == 1

            result = self.runner.invoke(ctl, ['query', 'alpha', '--member', 'abc', '--file', 'dummy'])
            assert result.exit_code == 0

            os.remove('dummy')

        result = self.runner.invoke(ctl, ['query', 'alpha', '--command', 'SELECT 1'])
        assert 'mock column' in result.output

        # --command or --file is mandatory
        result = self.runner.invoke(ctl, ['query', 'alpha'])
        assert result.exit_code == 1

        result = self.runner.invoke(ctl, ['query', 'alpha', '--command', 'SELECT 1', '--username', 'root',
                                          '--password', '--dbname', 'postgres'], input='ab\nab')
        assert 'mock column' in result.output

    def test_query_member(self):
        with patch('patroni.ctl.get_cursor', Mock(return_value=MockConnect().cursor())):
            for role in self.TEST_ROLES:
                rows = query_member(None, None, None, None, role, 'SELECT pg_catalog.pg_is_in_recovery()', {})
                self.assertTrue('False' in str(rows))

            with patch.object(MockCursor, 'execute', Mock(side_effect=OperationalError('bla'))):
                rows = query_member(None, None, None, None, 'replica', 'SELECT pg_catalog.pg_is_in_recovery()', {})

        with patch('patroni.ctl.get_cursor', Mock(return_value=None)):
            # No role nor member given -- generic message
            rows = query_member(None, None, None, None, None, 'SELECT pg_catalog.pg_is_in_recovery()', {})
            self.assertTrue('No connection is available' in str(rows))

            # Member given -- message pointing to member
            rows = query_member(None, None, None, 'foo', None, 'SELECT pg_catalog.pg_is_in_recovery()', {})
            self.assertTrue('No connection to member foo' in str(rows))

            # Role given -- message pointing to role
            rows = query_member(None, None, None, None, 'replica', 'SELECT pg_catalog.pg_is_in_recovery()', {})
            self.assertTrue('No connection to role replica' in str(rows))

        with patch('patroni.ctl.get_cursor', Mock(side_effect=OperationalError('bla'))):
            rows = query_member(None, None, None, None, 'replica', 'SELECT pg_catalog.pg_is_in_recovery()', {})

    def test_dsn(self):
        result = self.runner.invoke(ctl, ['dsn', 'alpha'])
        assert 'host=127.0.0.1 port=5435' in result.output

        # Mutually exclusive options
        for role in self.TEST_ROLES:
            result = self.runner.invoke(ctl, ['dsn', 'alpha', '--role', role, '--member', 'dummy'])
            assert result.exit_code == 1

        # Non-existing member
        result = self.runner.invoke(ctl, ['dsn', 'alpha', '--member', 'dummy'])
        assert result.exit_code == 1

    @patch('patroni.ctl.request_patroni')
    def test_reload(self, mock_post):
        result = self.runner.invoke(ctl, ['reload', 'alpha'], input='y')
        assert 'Failed: reload for member' in result.output

        mock_post.return_value.status = 200
        result = self.runner.invoke(ctl, ['reload', 'alpha'], input='y')
        assert 'No changes to apply on member' in result.output

        mock_post.return_value.status = 202
        result = self.runner.invoke(ctl, ['reload', 'alpha'], input='y')
        assert 'Reload request received for member' in result.output

    @patch('patroni.ctl.request_patroni')
    def test_restart_reinit(self, mock_post):
        mock_post.return_value.status = 503
        result = self.runner.invoke(ctl, ['restart', 'alpha'], input='now\ny\n')
        assert 'Failed: restart for' in result.output
        assert result.exit_code == 0

        result = self.runner.invoke(ctl, ['reinit', 'alpha'], input='y')
        assert result.exit_code == 1

        # successful reinit
        result = self.runner.invoke(ctl, ['reinit', 'alpha', 'other'], input='y\ny')
        assert result.exit_code == 0

        # Aborted restart
        result = self.runner.invoke(ctl, ['restart', 'alpha'], input='now\nN')
        assert result.exit_code == 1

        result = self.runner.invoke(ctl, ['restart', 'alpha', '--pending', '--force'])
        assert result.exit_code == 0

        # Aborted scheduled restart
        result = self.runner.invoke(ctl, ['restart', 'alpha', '--scheduled', '2019-10-01T14:30'], input='N')
        assert result.exit_code == 1

        # Not a member
        result = self.runner.invoke(ctl, ['restart', 'alpha', 'dummy', '--any'], input='now\ny')
        assert result.exit_code == 1

        # Wrong pg version
        result = self.runner.invoke(ctl, ['restart', 'alpha', '--any', '--pg-version', '9.1'], input='now\ny')
        assert 'Error: Invalid PostgreSQL version format' in result.output
        assert result.exit_code == 1

        result = self.runner.invoke(ctl, ['restart', 'alpha', '--pending', '--force', '--timeout', '10min'])
        assert result.exit_code == 0

        # normal restart, the schedule is actually parsed, but not validated in patronictl
        result = self.runner.invoke(ctl, ['restart', 'alpha', 'other', '--force', '--scheduled', '2300-10-01T14:30'])
        assert 'Failed: flush scheduled restart' in result.output

        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
            result = self.runner.invoke(ctl,
                                        ['restart', 'alpha', 'other', '--force', '--scheduled', '2300-10-01T14:30'])
            assert result.exit_code == 1

        # force restart with restart already present
        result = self.runner.invoke(ctl, ['restart', 'alpha', 'other', '--force', '--scheduled', '2300-10-01T14:30'])
        assert result.exit_code == 0

        ctl_args = ['restart', 'alpha', '--pg-version', '99.0', '--scheduled', '2300-10-01T14:30']
        # normal restart, the schedule is actually parsed, but not validated in patronictl
        mock_post.return_value.status = 200
        result = self.runner.invoke(ctl, ctl_args, input='y')
        assert result.exit_code == 0

        # get restart with the non-200 return code
        # normal restart, the schedule is actually parsed, but not validated in patronictl
        mock_post.return_value.status = 204
        result = self.runner.invoke(ctl, ctl_args, input='y')
        assert result.exit_code == 0

        # get restart with the non-200 return code
        # normal restart, the schedule is actually parsed, but not validated in patronictl
        mock_post.return_value.status = 202
        result = self.runner.invoke(ctl, ctl_args, input='y')
        assert 'Success: restart scheduled' in result.output
        assert result.exit_code == 0

        # get restart with the non-200 return code
        # normal restart, the schedule is actually parsed, but not validated in patronictl
        mock_post.return_value.status = 409
        result = self.runner.invoke(ctl, ctl_args, input='y')
        assert 'Failed: another restart is already' in result.output
        assert result.exit_code == 0

    def test_remove(self):
        result = self.runner.invoke(ctl, ['remove', 'dummy'], input='\n')
        assert 'For Citus clusters the --group must me specified' in result.output
        result = self.runner.invoke(ctl, ['remove', 'alpha', '--group', '0'], input='alpha\nstandby')
        assert 'Please confirm' in result.output
        assert 'You are about to remove all' in result.output
        # Not typing an exact confirmation
        assert result.exit_code == 1

        # leader specified does not match leader of cluster
        result = self.runner.invoke(ctl, ['remove', 'alpha', '--group', '0'], input='alpha\nYes I am aware\nstandby')
        assert result.exit_code == 1

        # cluster specified on cmdline does not match verification prompt
        result = self.runner.invoke(ctl, ['remove', 'alpha', '--group', '0'], input='beta\nleader')
        assert result.exit_code == 1

        result = self.runner.invoke(ctl, ['remove', 'alpha', '--group', '0'], input='alpha\nYes I am aware\nleader')
        assert result.exit_code == 0

    def test_ctl(self):
        result = self.runner.invoke(ctl, ['--help'])
        assert 'Usage:' in result.output

    def test_get_any_member(self):
        with click.Context(click.Command('list')) as ctx:
            ctx.obj = {'__config': {}, '__mpp': get_mpp({})}
            for role in self.TEST_ROLES:
                self.assertIsNone(get_any_member(get_cluster_initialized_without_leader(), None, role=role))

                m = get_any_member(get_cluster_initialized_with_leader(), None, role=role)
                self.assertEqual(m.name, 'leader')

    def test_get_all_members(self):
        with click.Context(click.Command('list')) as ctx:
            ctx.obj = {'__config': {}, '__mpp': get_mpp({})}
            for role in self.TEST_ROLES:
                self.assertEqual(list(get_all_members(get_cluster_initialized_without_leader(), None, role=role)), [])

                r = list(get_all_members(get_cluster_initialized_with_leader(), None, role=role))
                self.assertEqual(len(r), 1)
                self.assertEqual(r[0].name, 'leader')

            r = list(get_all_members(get_cluster_initialized_with_leader(), None, role='replica'))
            self.assertEqual(len(r), 1)
            self.assertEqual(r[0].name, 'other')

            self.assertEqual(len(list(get_all_members(get_cluster_initialized_without_leader(),
                                                      None, role='replica'))), 2)

    def test_members(self):
        result = self.runner.invoke(ctl, ['list'])
        assert '127.0.0.1' in result.output
        assert result.exit_code == 0
        assert 'Citus cluster: alpha -' in result.output

        result = self.runner.invoke(ctl, ['list', '--group', '0'])
        assert 'Citus cluster: alpha (group: 0, 12345678901) -' in result.output

        config = get_default_config()
        del config['citus']
        with patch('patroni.ctl.load_config', Mock(return_value=config)):
            result = self.runner.invoke(ctl, ['list'])
            assert 'Cluster: alpha (12345678901) -' in result.output

        with patch('patroni.ctl.load_config', Mock(return_value={})):
            self.runner.invoke(ctl, ['list'])

        cluster = get_cluster_initialized_with_leader()
        cluster.members[1].data['pending_restart'] = True
        cluster.members[1].data['pending_restart_reason'] = {'param': get_param_diff('', 'very l' + 'o' * 34 + 'ng')}
        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=cluster)):
            for cmd in ('list', 'topology'):
                result = self.runner.invoke(ctl, [cmd, 'dummy'])
                self.assertIn('param: [hidden - too long]', result.output)

            result = self.runner.invoke(ctl, ['list', 'dummy', '-f', 'tsv'])
            self.assertIn('param: ->very l' + 'o' * 34 + 'ng', result.output)

            cluster.members[1].data['pending_restart_reason'] = {'param': get_param_diff('', 'new')}
            result = self.runner.invoke(ctl, ['list', 'dummy'])
            self.assertIn('param: ->new', result.output)

    def test_list_extended(self):
        result = self.runner.invoke(ctl, ['list', 'dummy', '--extended', '--timestamp'])
        assert '2100' in result.output
        assert 'Scheduled restart' in result.output

    def test_topology(self):
        cluster = get_cluster_initialized_with_leader()
        cluster.members.append(Member(0, 'cascade', 28,
                                      {'conn_url': 'postgres://replicator:rep-pass@127.0.0.1:5437/postgres',
                                       'api_url': 'http://127.0.0.1:8012/patroni', 'state': 'running',
                                       'tags': {'replicatefrom': 'other'}}))
        cluster.members.append(Member(0, 'wrong_cascade', 28,
                                      {'conn_url': 'postgres://replicator:rep-pass@127.0.0.1:5438/postgres',
                                       'api_url': 'http://127.0.0.1:8013/patroni', 'state': 'running',
                                       'tags': {'replicatefrom': 'nonexistinghost'}}))
        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=cluster)):
            result = self.runner.invoke(ctl, ['topology', 'dummy'])
            assert '+\n|     0 | leader          | 127.0.0.1:5435 | Leader  |' in result.output
            assert '|\n|     0 | + other         | 127.0.0.1:5436 | Replica |' in result.output
            assert '|\n|     0 |   + cascade     | 127.0.0.1:5437 | Replica |' in result.output
            assert '|\n|     0 | + wrong_cascade | 127.0.0.1:5438 | Replica |' in result.output

        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_without_leader())):
            result = self.runner.invoke(ctl, ['topology', 'dummy'])
            assert '+\n|     0 | + leader | 127.0.0.1:5435 | Replica |' in result.output
            assert '|\n|     0 | + other  | 127.0.0.1:5436 | Replica |' in result.output

    @patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_with_leader()))
    def test_flush_restart(self):
        for role in self.TEST_ROLES:
            result = self.runner.invoke(ctl, ['flush', 'dummy', 'restart', '-r', role], input='y')
            assert 'No scheduled restart' in result.output

        result = self.runner.invoke(ctl, ['flush', 'dummy', 'restart', '--force'])
        assert 'Success: flush scheduled restart' in result.output
        with patch('patroni.ctl.request_patroni', Mock(return_value=MockResponse(404))):
            result = self.runner.invoke(ctl, ['flush', 'dummy', 'restart', '--force'])
            assert 'Failed: flush scheduled restart' in result.output

    def test_flush_switchover(self):
        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_with_leader())):
            result = self.runner.invoke(ctl, ['flush', 'dummy', 'switchover'])
            assert 'No pending scheduled switchover' in result.output

        scheduled_at = datetime.now(tzutc) + timedelta(seconds=600)
        with patch('patroni.dcs.AbstractDCS.get_cluster',
                   Mock(return_value=get_cluster_initialized_with_leader(Failover(1, 'a', 'b', scheduled_at)))):
            result = self.runner.invoke(ctl, ['-k', 'flush', 'dummy', 'switchover'])
            assert result.output.startswith('Success: ')

            with patch('patroni.ctl.request_patroni', side_effect=[MockResponse(409), Exception]), \
                    patch('patroni.dcs.AbstractDCS.manual_failover', Mock()):
                result = self.runner.invoke(ctl, ['flush', 'dummy', 'switchover'])
                assert 'Could not find any accessible member of cluster' in result.output

    @patch('patroni.ctl.polling_loop', Mock(return_value=[1]))
    def test_pause_cluster(self):
        with patch('patroni.ctl.request_patroni', Mock(return_value=MockResponse(500))):
            result = self.runner.invoke(ctl, ['pause', 'dummy'])
            assert 'Failed' in result.output

        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
            result = self.runner.invoke(ctl, ['pause', 'dummy'])
            assert 'Cluster is already paused' in result.output

        result = self.runner.invoke(ctl, ['pause', 'dummy', '--wait'])
        assert "'pause' request sent" in result.output

        with patch('patroni.dcs.AbstractDCS.get_cluster',
                   Mock(side_effect=[get_cluster_initialized_with_leader(), get_cluster(None, None, [], None, None)])):
            self.runner.invoke(ctl, ['pause', 'dummy', '--wait'])
        with patch('patroni.dcs.AbstractDCS.get_cluster',
                   Mock(side_effect=[get_cluster_initialized_with_leader(),
                                     get_cluster(None, None, [Member(1, 'other', 28, {})], None, None)])):
            self.runner.invoke(ctl, ['pause', 'dummy', '--wait'])

    @patch('patroni.ctl.request_patroni')
    @patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_with_leader()))
    def test_resume_cluster(self, mock_post):
        mock_post.return_value.status = 200
        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=False)):
            result = self.runner.invoke(ctl, ['resume', 'dummy'])
            assert 'Cluster is not paused' in result.output

        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
            result = self.runner.invoke(ctl, ['resume', 'dummy'])
            assert 'Success' in result.output

            mock_post.return_value.status = 500
            result = self.runner.invoke(ctl, ['resume', 'dummy'])
            assert 'Failed' in result.output

            mock_post.side_effect = Exception
            result = self.runner.invoke(ctl, ['resume', 'dummy'])
            assert 'Can not find accessible cluster member' in result.output

    def test_apply_config_changes(self):
        config = {"postgresql": {"parameters": {"work_mem": "4MB"}, "use_pg_rewind": True}, "ttl": 30}

        before_editing = format_config_for_editing(config)

        # Spaces are allowed and stripped, numbers and booleans are interpreted
        after_editing, changed_config = apply_config_changes(before_editing, config,
                                                             ["postgresql.parameters.work_mem = 5MB",
                                                              "ttl=15", "postgresql.use_pg_rewind=off", 'a.b=c'])
        self.assertEqual(changed_config, {"a": {"b": "c"}, "postgresql": {"parameters": {"work_mem": "5MB"},
                                                                          "use_pg_rewind": False}, "ttl": 15})

        # postgresql.parameters namespace is flattened
        after_editing, changed_config = apply_config_changes(before_editing, config,
                                                             ["postgresql.parameters.work_mem.sub = x"])
        self.assertEqual(changed_config, {"postgresql": {"parameters": {"work_mem": "4MB", "work_mem.sub": "x"},
                                                         "use_pg_rewind": True}, "ttl": 30})

        # Setting to null deletes
        after_editing, changed_config = apply_config_changes(before_editing, config,
                                                             ["postgresql.parameters.work_mem=null"])
        self.assertEqual(changed_config, {"postgresql": {"use_pg_rewind": True}, "ttl": 30})
        after_editing, changed_config = apply_config_changes(before_editing, config,
                                                             ["postgresql.use_pg_rewind=null",
                                                              "postgresql.parameters.work_mem=null"])
        self.assertEqual(changed_config, {"ttl": 30})

        self.assertRaises(PatroniCtlException, apply_config_changes, before_editing, config, ['a'])

    @patch('sys.stdout.isatty', return_value=False)
    @patch('patroni.ctl.markup_to_pager')
    @patch('os.environ.get', return_value=None)
    @patch('shutil.which', return_value=None)
    def test_show_diff(self, mock_which, mock_env_get, mock_markup_to_pager, mock_isatty):
        # no TTY
        show_diff("foo:\n  bar: 1\n", "foo:\n  bar: 2\n")
        mock_markup_to_pager.assert_not_called()

        # TTY but no PAGER nor executable
        mock_isatty.return_value = True
        with self.assertRaises(PatroniCtlException) as e:
            show_diff("foo:\n  bar: 1\n", "foo:\n  bar: 2\n")
        self.assertEqual(
            str(e.exception),
            'No pager could be found. Either set PAGER environment variable with '
            'your pager or install either "less" or "more" in the host.'
        )
        mock_env_get.assert_called_once_with('PAGER')
        mock_which.assert_has_calls([
            mock.call('less'),
            mock.call('more'),
        ])
        mock_markup_to_pager.assert_not_called()

        # TTY with PAGER set but invalid
        mock_env_get.reset_mock()
        mock_env_get.return_value = 'random'
        mock_which.reset_mock()
        with self.assertRaises(PatroniCtlException) as e:
            show_diff("foo:\n  bar: 1\n", "foo:\n  bar: 2\n")
        self.assertEqual(
            str(e.exception),
            'No pager could be found. Either set PAGER environment variable with '
            'your pager or install either "less" or "more" in the host.'
        )
        mock_env_get.assert_called_once_with('PAGER')
        mock_which.assert_has_calls([
            mock.call('random'),
            mock.call('less'),
            mock.call('more'),
        ])
        mock_markup_to_pager.assert_not_called()

        # TTY with valid executable
        mock_which.side_effect = [None, '/usr/bin/less', None]
        show_diff("foo:\n  bar: 1\n", "foo:\n  bar: 2\n")
        mock_markup_to_pager.assert_called_once()

        # Test that unicode handling doesn't fail with an exception
        mock_which.side_effect = [None, '/usr/bin/less', None]
        show_diff(b"foo:\n  bar: \xc3\xb6\xc3\xb6\n".decode('utf-8'),
                  b"foo:\n  bar: \xc3\xbc\xc3\xbc\n".decode('utf-8'))

    @patch('subprocess.call', return_value=1)
    def test_invoke_editor(self, mock_subprocess_call):
        os.environ.pop('EDITOR', None)
        for e in ('', '/bin/vi'):
            with patch('shutil.which', Mock(return_value=e)):
                self.assertRaises(PatroniCtlException, invoke_editor, 'foo: bar\n', 'test')

    def test_show_config(self):
        self.runner.invoke(ctl, ['show-config', 'dummy'])

    @patch('subprocess.call', Mock(return_value=0))
    def test_edit_config(self):
        os.environ['EDITOR'] = 'true'
        self.runner.invoke(ctl, ['edit-config', 'dummy'])
        self.runner.invoke(ctl, ['edit-config', 'dummy', '-s', 'foo=bar'])
        self.runner.invoke(ctl, ['edit-config', 'dummy', '--replace', 'postgres0.yml'])
        self.runner.invoke(ctl, ['edit-config', 'dummy', '--apply', '-'], input='foo: bar')
        self.runner.invoke(ctl, ['edit-config', 'dummy', '--force', '--apply', '-'], input='foo: bar')
        with patch('patroni.dcs.etcd.Etcd.set_config_value', Mock(return_value=True)):
            self.runner.invoke(ctl, ['edit-config', 'dummy', '--force', '--apply', '-'], input='foo: bar')
        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=Cluster.empty())):
            result = self.runner.invoke(ctl, ['edit-config', 'dummy'])
            assert result.exit_code == 1
            assert 'The config key does not exist in the cluster dummy' in result.output

    @patch('patroni.ctl.request_patroni')
    def test_version(self, mock_request):
        result = self.runner.invoke(ctl, ['version'])
        assert 'patronictl version' in result.output
        mock_request.return_value.data = b'{"patroni":{"version":"1.2.3"},"server_version": 100001}'
        result = self.runner.invoke(ctl, ['version', 'dummy'])
        assert '1.2.3' in result.output
        mock_request.side_effect = Exception
        result = self.runner.invoke(ctl, ['version', 'dummy'])
        assert 'failed to get version' in result.output

    def test_history(self):
        with patch('patroni.dcs.AbstractDCS.get_cluster') as mock_get_cluster:
            mock_get_cluster.return_value.history.lines = [[1, 67176, 'no recovery target specified']]
            result = self.runner.invoke(ctl, ['history'])
            assert 'Reason' in result.output

    def test_format_pg_version(self):
        self.assertEqual(format_pg_version(100001), '10.1')
        self.assertEqual(format_pg_version(90605), '9.6.5')

    def test_get_members(self):
        with patch('patroni.dcs.AbstractDCS.get_cluster',
                   Mock(return_value=get_cluster_not_initialized_without_leader())):
            result = self.runner.invoke(ctl, ['reinit', 'dummy'])
            assert "cluster doesn\'t have any members" in result.output

    @patch('time.sleep', Mock())
    def test_reinit_wait(self):
        with patch.object(PoolManager, 'request') as mocked:
            mocked.side_effect = [Mock(data=s, status=200) for s in
                                  [b"reinitialize", b'{"state":"creating replica"}', b'{"state":"running"}']]
            result = self.runner.invoke(ctl, ['reinit', 'alpha', 'other', '--wait'], input='y\ny')
        self.assertIn("Waiting for reinitialize to complete on: other", result.output)
        self.assertIn("Reinitialize is completed on: other", result.output)


class TestPatronictlPrettyTable(unittest.TestCase):

    def setUp(self):
        self.pt = PatronictlPrettyTable(' header', ['foo', 'bar'], hrules=ALL)

    def test__get_hline(self):
        expected = '+-----+-----+'
        self.pt._hrule = expected
        self.assertEqual(self.pt._hrule, '+ header----+')
        self.assertFalse(self.pt._is_first_hline())
        self.assertEqual(self.pt._hrule, expected)

    @patch.object(PrettyTable, '_stringify_hrule', Mock(return_value='+-----+-----+'))
    def test__stringify_hrule(self):
        self.assertEqual(self.pt._stringify_hrule((), 'top_'), '+ header----+')
        self.assertFalse(self.pt._is_first_hline())

    def test_output(self):
        self.assertEqual(str(self.pt), '+ header----+\n| foo | bar |\n+-----+-----+')