mirror of
https://github.com/outbackdingo/patroni.git
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Alexander KukushkinandGitHub
bc15813de0
Create permanent physical replication slots on standby nodes and use `pg_replication_slot_advance()` function to move them forward. The `restart_lsn` is advanced based on values stored in the `/status` key by the primary node. When slot is created on a replica it could be ahead the same slot on the primary and therefore there is some period of time when it doesn't protect WAL files from being recycled.
68 lines
3.6 KiB
Gherkin
68 lines
3.6 KiB
Gherkin
Feature: standby cluster
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Scenario: prepare the cluster with logical slots
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Given I start postgres1
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Then postgres1 is a leader after 10 seconds
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And there is a non empty initialize key in DCS after 15 seconds
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When I issue a PATCH request to http://127.0.0.1:8009/config with {"slots": {"pm_1": {"type": "physical"}}, "postgresql": {"parameters": {"wal_level": "logical"}}}
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Then I receive a response code 200
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And Response on GET http://127.0.0.1:8009/config contains slots after 10 seconds
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And I sleep for 3 seconds
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When I issue a PATCH request to http://127.0.0.1:8009/config with {"slots": {"test_logical": {"type": "logical", "database": "postgres", "plugin": "test_decoding"}}}
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Then I receive a response code 200
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And I do a backup of postgres1
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When I start postgres0
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Then "members/postgres0" key in DCS has state=running after 10 seconds
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And replication works from postgres1 to postgres0 after 15 seconds
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When I issue a GET request to http://127.0.0.1:8008/patroni
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Then I receive a response code 200
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And I receive a response replication_state streaming
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And "members/postgres0" key in DCS has replication_state=streaming after 10 seconds
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@slot-advance
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Scenario: check permanent logical slots are synced to the replica
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Given I run patronictl.py restart batman postgres1 --force
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Then Logical slot test_logical is in sync between postgres0 and postgres1 after 10 seconds
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Scenario: Detach exiting node from the cluster
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When I shut down postgres1
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Then postgres0 is a leader after 10 seconds
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And "members/postgres0" key in DCS has role=master after 3 seconds
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When I issue a GET request to http://127.0.0.1:8008/
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Then I receive a response code 200
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Scenario: check replication of a single table in a standby cluster
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Given I start postgres1 in a standby cluster batman1 as a clone of postgres0
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Then postgres1 is a leader of batman1 after 10 seconds
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When I add the table foo to postgres0
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Then table foo is present on postgres1 after 20 seconds
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When I issue a GET request to http://127.0.0.1:8009/patroni
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Then I receive a response code 200
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And I receive a response replication_state streaming
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And I sleep for 3 seconds
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When I issue a GET request to http://127.0.0.1:8009/primary
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Then I receive a response code 503
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When I issue a GET request to http://127.0.0.1:8009/standby_leader
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Then I receive a response code 200
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And I receive a response role standby_leader
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And there is a postgres1_cb.log with "on_role_change standby_leader batman1" in postgres1 data directory
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When I start postgres2 in a cluster batman1
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Then postgres2 role is the replica after 24 seconds
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And table foo is present on postgres2 after 20 seconds
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When I issue a GET request to http://127.0.0.1:8010/patroni
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Then I receive a response code 200
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And I receive a response replication_state streaming
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And postgres1 does not have a logical replication slot named test_logical
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Scenario: check failover
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When I kill postgres1
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And I kill postmaster on postgres1
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Then postgres2 is replicating from postgres0 after 32 seconds
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When I issue a GET request to http://127.0.0.1:8010/primary
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Then I receive a response code 503
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And I sleep for 3 seconds
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When I issue a GET request to http://127.0.0.1:8010/standby_leader
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Then I receive a response code 200
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And I receive a response role standby_leader
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And replication works from postgres0 to postgres2 after 15 seconds
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And there is a postgres2_cb.log with "on_start replica batman1\non_role_change standby_leader batman1" in postgres2 data directory
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