224 lines
8.7 KiB
Python
224 lines
8.7 KiB
Python
# Copyright 2024 Memgraph Ltd.
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#
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# Use of this software is governed by the Business Source License
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# included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
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# License, and you may not use this file except in compliance with the Business Source License.
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#
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# As of the Change Date specified in that file, in accordance with
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# the Business Source License, use of this software will be governed
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# by the Apache License, Version 2.0, included in the file
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# licenses/APL.txt.
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import os
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import sys
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import interactive_mg_runner
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import pytest
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from common import execute_and_fetch_all
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from mg_utils import mg_sleep_and_assert
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interactive_mg_runner.SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
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interactive_mg_runner.PROJECT_DIR = os.path.normpath(
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os.path.join(interactive_mg_runner.SCRIPT_DIR, "..", "..", "..", "..")
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)
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interactive_mg_runner.BUILD_DIR = os.path.normpath(os.path.join(interactive_mg_runner.PROJECT_DIR, "build"))
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interactive_mg_runner.MEMGRAPH_BINARY = os.path.normpath(os.path.join(interactive_mg_runner.BUILD_DIR, "memgraph"))
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MEMGRAPH_INSTANCES_DESCRIPTION = {
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"instance_1": {
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"args": ["--bolt-port", "7688", "--log-level", "TRACE", "--coordinator-server-port", "10011"],
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"log_file": "replica1.log",
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"setup_queries": [],
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},
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"instance_2": {
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"args": ["--bolt-port", "7689", "--log-level", "TRACE", "--coordinator-server-port", "10012"],
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"log_file": "replica2.log",
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"setup_queries": [],
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},
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"instance_3": {
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"args": ["--bolt-port", "7687", "--log-level", "TRACE", "--coordinator-server-port", "10013"],
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"log_file": "main.log",
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"setup_queries": [],
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},
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"coordinator": {
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"args": ["--bolt-port", "7690", "--log-level=TRACE", "--coordinator"],
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"log_file": "replica3.log",
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"setup_queries": [
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"REGISTER INSTANCE instance_1 ON '127.0.0.1:10011' WITH '127.0.0.1:10001';",
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"REGISTER INSTANCE instance_2 ON '127.0.0.1:10012' WITH '127.0.0.1:10002';",
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"REGISTER INSTANCE instance_3 ON '127.0.0.1:10013' WITH '127.0.0.1:10003';",
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"SET INSTANCE instance_3 TO MAIN",
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],
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},
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}
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def test_replication_works_on_failover(connection):
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# Goal of this test is to check the replication works after failover command.
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# 1. We start all replicas, main and coordinator manually: we want to be able to kill them ourselves without relying on external tooling to kill processes.
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# 2. We check that main has correct state
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# 3. We kill main
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# 4. We check that coordinator and new main have correct state
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# 5. We insert one vertex on new main
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# 6. We check that vertex appears on new replica
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# 1
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interactive_mg_runner.start_all(MEMGRAPH_INSTANCES_DESCRIPTION)
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# 2
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main_cursor = connection(7687, "instance_3").cursor()
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expected_data_on_main = [
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("instance_1", "127.0.0.1:10001", "sync", 0, 0, "ready"),
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("instance_2", "127.0.0.1:10002", "sync", 0, 0, "ready"),
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]
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actual_data_on_main = sorted(list(execute_and_fetch_all(main_cursor, "SHOW REPLICAS;")))
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assert actual_data_on_main == expected_data_on_main
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# 3
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interactive_mg_runner.kill(MEMGRAPH_INSTANCES_DESCRIPTION, "instance_3")
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# 4
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coord_cursor = connection(7690, "coordinator").cursor()
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def retrieve_data_show_repl_cluster():
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return sorted(list(execute_and_fetch_all(coord_cursor, "SHOW REPLICATION CLUSTER;")))
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expected_data_on_coord = [
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("instance_1", "127.0.0.1:10011", True, "main"),
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("instance_2", "127.0.0.1:10012", True, "replica"),
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("instance_3", "127.0.0.1:10013", False, ""),
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]
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mg_sleep_and_assert(expected_data_on_coord, retrieve_data_show_repl_cluster)
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new_main_cursor = connection(7688, "instance_1").cursor()
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def retrieve_data_show_replicas():
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return sorted(list(execute_and_fetch_all(new_main_cursor, "SHOW REPLICAS;")))
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expected_data_on_new_main = [
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("instance_2", "127.0.0.1:10002", "sync", 0, 0, "ready"),
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]
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mg_sleep_and_assert(expected_data_on_new_main, retrieve_data_show_replicas)
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# 5
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execute_and_fetch_all(new_main_cursor, "CREATE ();")
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# 6
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alive_replica_cursror = connection(7689, "instance_2").cursor()
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res = execute_and_fetch_all(alive_replica_cursror, "MATCH (n) RETURN count(n) as count;")[0][0]
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assert res == 1, "Vertex should be replicated"
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interactive_mg_runner.stop_all(MEMGRAPH_INSTANCES_DESCRIPTION)
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def test_show_replication_cluster(connection):
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# Goal of this test is to check the SHOW REPLICATION CLUSTER command.
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# 1. We start all replicas, main and coordinator manually: we want to be able to kill them ourselves without relying on external tooling to kill processes.
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# 2. We check that all replicas and main have the correct state: they should all be alive.
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# 3. We kill one replica. It should not appear anymore in the SHOW REPLICATION CLUSTER command.
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# 4. We kill main. It should not appear anymore in the SHOW REPLICATION CLUSTER command.
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# 1.
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interactive_mg_runner.start_all(MEMGRAPH_INSTANCES_DESCRIPTION)
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cursor = connection(7690, "coordinator").cursor()
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# 2.
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# We leave some time for the coordinator to realise the replicas are down.
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def retrieve_data():
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return sorted(list(execute_and_fetch_all(cursor, "SHOW REPLICATION CLUSTER;")))
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expected_data = [
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("instance_1", "127.0.0.1:10011", True, "replica"),
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("instance_2", "127.0.0.1:10012", True, "replica"),
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("instance_3", "127.0.0.1:10013", True, "main"),
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]
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mg_sleep_and_assert(expected_data, retrieve_data)
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# 3.
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interactive_mg_runner.kill(MEMGRAPH_INSTANCES_DESCRIPTION, "instance_1")
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expected_data = [
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("instance_1", "127.0.0.1:10011", False, ""),
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("instance_2", "127.0.0.1:10012", True, "replica"),
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("instance_3", "127.0.0.1:10013", True, "main"),
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]
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mg_sleep_and_assert(expected_data, retrieve_data)
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# 4.
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interactive_mg_runner.kill(MEMGRAPH_INSTANCES_DESCRIPTION, "instance_2")
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expected_data = [
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("instance_1", "127.0.0.1:10011", False, ""),
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("instance_2", "127.0.0.1:10012", False, ""),
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("instance_3", "127.0.0.1:10013", True, "main"),
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]
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mg_sleep_and_assert(expected_data, retrieve_data)
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def test_simple_automatic_failover(connection):
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interactive_mg_runner.start_all(MEMGRAPH_INSTANCES_DESCRIPTION)
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main_cursor = connection(7687, "instance_3").cursor()
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expected_data_on_main = [
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("instance_1", "127.0.0.1:10001", "sync", 0, 0, "ready"),
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("instance_2", "127.0.0.1:10002", "sync", 0, 0, "ready"),
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]
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actual_data_on_main = sorted(list(execute_and_fetch_all(main_cursor, "SHOW REPLICAS;")))
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assert actual_data_on_main == expected_data_on_main
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interactive_mg_runner.kill(MEMGRAPH_INSTANCES_DESCRIPTION, "instance_3")
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coord_cursor = connection(7690, "coordinator").cursor()
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def retrieve_data_show_repl_cluster():
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return sorted(list(execute_and_fetch_all(coord_cursor, "SHOW REPLICATION CLUSTER;")))
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expected_data_on_coord = [
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("instance_1", "127.0.0.1:10011", True, "main"),
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("instance_2", "127.0.0.1:10012", True, "replica"),
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("instance_3", "127.0.0.1:10013", False, ""),
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]
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mg_sleep_and_assert(expected_data_on_coord, retrieve_data_show_repl_cluster)
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new_main_cursor = connection(7688, "instance_1").cursor()
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def retrieve_data_show_replicas():
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return sorted(list(execute_and_fetch_all(new_main_cursor, "SHOW REPLICAS;")))
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expected_data_on_new_main = [
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("instance_2", "127.0.0.1:10002", "sync", 0, 0, "ready"),
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]
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mg_sleep_and_assert(expected_data_on_new_main, retrieve_data_show_replicas)
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def test_registering_replica_fails_name_exists(connection):
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interactive_mg_runner.start_all(MEMGRAPH_INSTANCES_DESCRIPTION)
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coord_cursor = connection(7690, "coordinator").cursor()
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with pytest.raises(Exception) as e:
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execute_and_fetch_all(
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coord_cursor,
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"REGISTER INSTANCE instance_1 ON '127.0.0.1:10051' WITH '127.0.0.1:10111';",
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)
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assert str(e.value) == "Couldn't register replica instance since instance with such name already exists!"
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def test_registering_replica_fails_endpoint_exists(connection):
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interactive_mg_runner.start_all(MEMGRAPH_INSTANCES_DESCRIPTION)
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coord_cursor = connection(7690, "coordinator").cursor()
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with pytest.raises(Exception) as e:
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execute_and_fetch_all(
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coord_cursor,
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"REGISTER INSTANCE instance_5 ON '127.0.0.1:10001' WITH '127.0.0.1:10013';",
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)
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assert (
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str(e.value)
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== "Couldn't register replica because promotion on replica failed! Check logs on replica to find out more info!"
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)
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if __name__ == "__main__":
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sys.exit(pytest.main([__file__, "-rA"]))
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