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If logical replication slot is created with failover => true option, we get respective field set to true in `pg_replication_slots` view. By avoiding interacting with such slots we make logical failover slots feature fully functional in PG17.
67 lines
5.0 KiB
Gherkin
67 lines
5.0 KiB
Gherkin
Feature: ignored slots
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Scenario: check ignored slots aren't removed on failover/switchover
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Given I start postgres-1
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Then postgres-1 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 {"ignore_slots": [{"name": "unmanaged_slot_0", "database": "postgres", "plugin": "test_decoding", "type": "logical"}, {"name": "unmanaged_slot_1", "database": "postgres", "plugin": "test_decoding"}, {"name": "unmanaged_slot_2", "database": "postgres"}, {"name": "unmanaged_slot_3"}], "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 ignore_slots after 10 seconds
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And Response on GET http://127.0.0.1:8009/patroni contains pending_restart after 10 seconds
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# Make sure the wal_level has been changed.
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When I run patronictl.py restart batman postgres-1 --force
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Then "members/postgres-1" key in DCS has role=primary after 10 seconds
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# Make sure Patroni has finished telling Postgres it should be accepting writes.
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And postgres-1 role is the primary after 20 seconds
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# 1. Create our test logical replication slot.
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# Test that ny subset of attributes in the ignore slots matcher is enough to match a slot
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# by using 3 different slots.
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When I create a logical replication slot unmanaged_slot_0 on postgres-1 with the test_decoding plugin
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And I create a logical replication slot unmanaged_slot_1 on postgres-1 with the test_decoding plugin
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And I create a logical replication slot unmanaged_slot_2 on postgres-1 with the test_decoding plugin
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And I create a logical replication slot unmanaged_slot_3 on postgres-1 with the test_decoding plugin
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And I create a logical replication slot dummy_slot on postgres-1 with the test_decoding plugin
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# It seems like it'd be obvious that these slots exist since we just created them,
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# but Patroni can actually end up dropping them almost immediately, so it's helpful
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# to verify they exist before we begin testing whether they persist through failover
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# cycles.
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Then postgres-1 has a logical replication slot named unmanaged_slot_0 with the test_decoding plugin after 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_1 with the test_decoding plugin after 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_2 with the test_decoding plugin after 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_3 with the test_decoding plugin after 2 seconds
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When I start postgres-0
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Then "members/postgres-0" key in DCS has role=replica after 10 seconds
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And postgres-0 role is the secondary after 20 seconds
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# Verify that the replica has advanced beyond the point in the WAL
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# where we created the replication slot so that on the next failover
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# cycle we don't accidentally rewind to before the slot creation.
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And replication works from postgres-1 to postgres-0 after 20 seconds
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When I shut down postgres-1
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Then "members/postgres-0" key in DCS has role=primary after 10 seconds
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# 2. After a failover the server (now a replica) still has the slot.
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When I start postgres-1
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Then postgres-1 role is the secondary after 20 seconds
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And "members/postgres-1" key in DCS has role=replica after 10 seconds
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# give Patroni time to sync replication slots
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And I sleep for 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_0 with the test_decoding plugin after 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_1 with the test_decoding plugin after 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_2 with the test_decoding plugin after 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_3 with the test_decoding plugin after 2 seconds
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And postgres-1 does not have a replication slot named dummy_slot
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# 3. After a failover the server (now a primary) still has the slot.
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When I shut down postgres-0
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Then "members/postgres-1" key in DCS has role=primary after 10 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_0 with the test_decoding plugin after 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_1 with the test_decoding plugin after 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_2 with the test_decoding plugin after 2 seconds
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And postgres-1 has a logical replication slot named unmanaged_slot_3 with the test_decoding plugin after 2 seconds
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@pg170000
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Scenario: check that logical slots with failover are not removed by Patroni
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Given I create a logical failover slot test17 on postgres-1 with the pgoutput plugin
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When I run patronictl.py restart batman postgres-1 --force
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Then postgres-1 has a logical replication slot named test17 with the pgoutput plugin after 2 seconds
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