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To enable quorum commit: ```diff $ patronictl.py edit-config --- +++ @@ -5,3 +5,4 @@ use_pg_rewind: true retry_timeout: 10 ttl: 30 +synchronous_mode: quorum Apply these changes? [y/N]: y Configuration changed ``` By default Patroni will use `ANY 1(list,of,stanbys)` in `synchronous_standby_names`. That is, only one node out of listed replicas will be used for quorum. If you want to increase the number of quorum nodes it is possible to do it with: ```diff $ patronictl edit-config --- +++ @@ -6,3 +6,4 @@ retry_timeout: 10 synchronous_mode: quorum ttl: 30 +synchronous_node_count: 2 Apply these changes? [y/N]: y Configuration changed ``` Good old `synchronous_mode: on` is still supported. Close https://github.com/patroni/patroni/issues/664 Close https://github.com/zalando/patroni/pull/672
61 lines
2.2 KiB
Python
61 lines
2.2 KiB
Python
import json
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import re
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import time
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from behave import step, then
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@step('sync key in DCS has {key:w}={value} after {time_limit:d} seconds')
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def check_sync(context, key, value, time_limit):
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time_limit *= context.timeout_multiplier
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max_time = time.time() + int(time_limit)
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dcs_value = None
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while time.time() < max_time:
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try:
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response = json.loads(context.dcs_ctl.query('sync'))
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dcs_value = response.get(key)
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if key == 'sync_standby' and set((dcs_value or '').split(',')) == set(value.split(',')):
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return
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elif str(dcs_value) == value:
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return
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except Exception:
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pass
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time.sleep(1)
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assert False, "sync does not have {0}={1} (found {2}) in dcs after {3} seconds".format(key, value,
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dcs_value, time_limit)
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def _parse_synchronous_standby_names(value):
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if '(' in value:
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m = re.match(r'.*(\d+) \(([^)]+)\)', value)
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expected_value = set(m.group(2).split())
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expected_num = m.group(1)
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else:
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expected_value = set([value])
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expected_num = '1'
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return expected_num, expected_value
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@then('synchronous_standby_names on {name:2} is set to "{value}" after {time_limit:d} seconds')
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def check_synchronous_standby_names(context, name, value, time_limit):
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time_limit *= context.timeout_multiplier
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max_time = time.time() + int(time_limit)
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if value == '_empty_str_':
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value = ''
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expected_num, expected_value = _parse_synchronous_standby_names(value)
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ssn = None
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while time.time() < max_time:
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try:
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ssn = context.pctl.query(name, "SHOW synchronous_standby_names").fetchone()[0]
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db_num, db_value = _parse_synchronous_standby_names(ssn)
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if expected_value == db_value and expected_num == db_num:
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return
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except Exception:
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pass
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time.sleep(1)
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assert False, "synchronous_standby_names is not set to '{0}' (found '{1}') after {2} seconds".format(value, ssn,
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time_limit)
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