mirror of https://github.com/citusdata/citus.git
239 lines
9.8 KiB
PL/PgSQL
239 lines
9.8 KiB
PL/PgSQL
-- Test creation of mx tables and metadata syncing
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SELECT nextval('pg_catalog.pg_dist_placement_placementid_seq') AS last_placement_id
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\gset
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SELECT nextval('pg_catalog.pg_dist_groupid_seq') AS last_group_id \gset
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SELECT nextval('pg_catalog.pg_dist_node_nodeid_seq') AS last_node_id \gset
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SELECT nextval('pg_catalog.pg_dist_colocationid_seq') AS last_colocation_id \gset
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SELECT nextval('pg_catalog.pg_dist_shardid_seq') AS last_shard_id \gset
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SET citus.replication_model TO streaming;
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SET citus.shard_count TO 8;
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SET citus.shard_replication_factor TO 1;
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SET citus.replicate_reference_tables_on_activate TO off;
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-- Simulates a readonly node by setting default_transaction_read_only.
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CREATE FUNCTION mark_node_readonly(hostname TEXT, port INTEGER, isreadonly BOOLEAN)
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RETURNS TEXT
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LANGUAGE sql
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AS $$
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SELECT master_run_on_worker(ARRAY[hostname], ARRAY[port],
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ARRAY['ALTER SYSTEM SET default_transaction_read_only TO ' || isreadonly::TEXT], false);
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SELECT result FROM
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master_run_on_worker(ARRAY[hostname], ARRAY[port],
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ARRAY['SELECT pg_reload_conf()'], false);
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$$;
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-- add a node to the cluster
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SELECT master_add_node('localhost', :worker_1_port) As nodeid_1 \gset
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SELECT nodeid, nodename, nodeport, hasmetadata, metadatasynced FROM pg_dist_node;
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-- create couple of tables
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CREATE TABLE ref_table(a int primary key);
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SELECT create_reference_table('ref_table');
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CREATE TABLE dist_table_1(a int primary key, b int references ref_table(a));
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SELECT create_distributed_table('dist_table_1', 'a');
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-- update the node
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SELECT 1 FROM master_update_node((SELECT nodeid FROM pg_dist_node),
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'localhost', :worker_2_port);
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SELECT nodeid, nodename, nodeport, hasmetadata, metadatasynced FROM pg_dist_node;
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-- start syncing metadata to the node
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SELECT 1 FROM start_metadata_sync_to_node('localhost', :worker_2_port);
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SELECT nodeid, nodename, nodeport, hasmetadata, metadatasynced FROM pg_dist_node;
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--------------------------------------------------------------------------
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-- Test that maintenance daemon syncs after master_update_node
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--------------------------------------------------------------------------
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-- Update the node again. We do this as epeatable read, so we just see the
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-- changes by master_update_node(). This is to avoid inconsistent results
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-- if the maintenance daemon does the metadata sync too fast.
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BEGIN TRANSACTION ISOLATION LEVEL REPEATABLE READ;
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SELECT nodeid, nodename, nodeport, hasmetadata, metadatasynced FROM pg_dist_node;
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', :worker_1_port);
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SELECT nodeid, nodename, nodeport, hasmetadata, metadatasynced FROM pg_dist_node;
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END;
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-- wait until maintenance daemon does the next metadata sync, and then
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-- check if metadata is synced again
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SELECT wait_until_metadata_sync();
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SELECT nodeid, hasmetadata, metadatasynced FROM pg_dist_node;
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SELECT verify_metadata('localhost', :worker_1_port);
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-- Update the node to a non-existent node. This is to simulate updating to
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-- a unwriteable node.
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BEGIN TRANSACTION ISOLATION LEVEL REPEATABLE READ;
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SELECT nodeid, nodename, nodeport, hasmetadata, metadatasynced FROM pg_dist_node;
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', 12345);
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SELECT nodeid, nodename, nodeport, hasmetadata, metadatasynced FROM pg_dist_node;
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END;
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-- maintenace daemon metadata sync should fail, because node is still unwriteable.
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SELECT wait_until_metadata_sync();
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SELECT nodeid, hasmetadata, metadatasynced FROM pg_dist_node;
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-- update it back to :worker_1_port, now metadata should be synced
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', :worker_1_port);
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SELECT wait_until_metadata_sync();
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SELECT nodeid, hasmetadata, metadatasynced FROM pg_dist_node;
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--------------------------------------------------------------------------
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-- Test updating a node when another node is in readonly-mode
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--------------------------------------------------------------------------
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SELECT master_add_node('localhost', :worker_2_port) AS nodeid_2 \gset
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SELECT 1 FROM start_metadata_sync_to_node('localhost', :worker_2_port);
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-- Create a table with shards on both nodes
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CREATE TABLE dist_table_2(a int);
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SELECT create_distributed_table('dist_table_2', 'a');
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INSERT INTO dist_table_2 SELECT i FROM generate_series(1, 100) i;
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SELECT mark_node_readonly('localhost', :worker_2_port, TRUE);
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-- Now updating the other node will mark worker 2 as not synced.
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BEGIN;
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', 12345);
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SELECT nodeid, hasmetadata, metadatasynced FROM pg_dist_node ORDER BY nodeid;
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COMMIT;
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-- worker_2 is out of sync, so further updates aren't sent to it and
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-- we shouldn't see the warnings.
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', 23456);
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SELECT nodeid, hasmetadata, metadatasynced FROM pg_dist_node ORDER BY nodeid;
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-- Make the node writeable.
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SELECT mark_node_readonly('localhost', :worker_2_port, FALSE);
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SELECT wait_until_metadata_sync();
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-- Mark the node readonly again, so the following master_update_node warns
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SELECT mark_node_readonly('localhost', :worker_2_port, TRUE);
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-- Revert the nodeport of worker 1.
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BEGIN;
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', :worker_1_port);
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SELECT count(*) FROM dist_table_2;
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END;
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SELECT wait_until_metadata_sync();
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-- Make the node writeable.
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SELECT mark_node_readonly('localhost', :worker_2_port, FALSE);
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SELECT wait_until_metadata_sync();
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', :worker_1_port);
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SELECT verify_metadata('localhost', :worker_1_port),
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verify_metadata('localhost', :worker_2_port);
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--------------------------------------------------------------------------
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-- Test that master_update_node rolls back properly
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--------------------------------------------------------------------------
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BEGIN;
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', 12345);
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ROLLBACK;
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SELECT verify_metadata('localhost', :worker_1_port),
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verify_metadata('localhost', :worker_2_port);
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--------------------------------------------------------------------------
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-- Test that master_update_node can appear in a prepared transaction.
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--------------------------------------------------------------------------
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BEGIN;
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', 12345);
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PREPARE TRANSACTION 'tx01';
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COMMIT PREPARED 'tx01';
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SELECT wait_until_metadata_sync();
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SELECT nodeid, hasmetadata, metadatasynced FROM pg_dist_node ORDER BY nodeid;
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BEGIN;
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SELECT 1 FROM master_update_node(:nodeid_1, 'localhost', :worker_1_port);
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PREPARE TRANSACTION 'tx01';
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COMMIT PREPARED 'tx01';
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SELECT wait_until_metadata_sync();
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SELECT nodeid, hasmetadata, metadatasynced FROM pg_dist_node ORDER BY nodeid;
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SELECT verify_metadata('localhost', :worker_1_port),
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verify_metadata('localhost', :worker_2_port);
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--------------------------------------------------------------------------
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-- Test that changes in isactive is propagated to the metadata nodes
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--------------------------------------------------------------------------
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-- Don't drop the reference table so it has shards on the nodes being disabled
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DROP TABLE dist_table_1, dist_table_2;
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SELECT 1 FROM master_disable_node('localhost', :worker_2_port);
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SELECT verify_metadata('localhost', :worker_1_port);
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SELECT 1 FROM master_activate_node('localhost', :worker_2_port);
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SELECT verify_metadata('localhost', :worker_1_port);
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------------------------------------------------------------------------------------
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-- Test master_disable_node() when the node that is being disabled is actually down
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------------------------------------------------------------------------------------
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SELECT master_update_node(:nodeid_2, 'localhost', 1);
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SELECT wait_until_metadata_sync();
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-- set metadatasynced so we try porpagating metadata changes
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UPDATE pg_dist_node SET metadatasynced = TRUE WHERE nodeid IN (:nodeid_1, :nodeid_2);
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-- should error out
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SELECT 1 FROM master_disable_node('localhost', 1);
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-- try again after stopping metadata sync
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SELECT stop_metadata_sync_to_node('localhost', 1);
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SELECT 1 FROM master_disable_node('localhost', 1);
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SELECT verify_metadata('localhost', :worker_1_port);
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SELECT master_update_node(:nodeid_2, 'localhost', :worker_2_port);
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SELECT wait_until_metadata_sync();
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SELECT 1 FROM master_activate_node('localhost', :worker_2_port);
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SELECT verify_metadata('localhost', :worker_1_port);
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------------------------------------------------------------------------------------
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-- Test master_disable_node() when the other node is down
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------------------------------------------------------------------------------------
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-- node 1 is down.
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SELECT master_update_node(:nodeid_1, 'localhost', 1);
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SELECT wait_until_metadata_sync();
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-- set metadatasynced so we try porpagating metadata changes
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UPDATE pg_dist_node SET metadatasynced = TRUE WHERE nodeid IN (:nodeid_1, :nodeid_2);
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-- should error out
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SELECT 1 FROM master_disable_node('localhost', :worker_2_port);
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-- try again after stopping metadata sync
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SELECT stop_metadata_sync_to_node('localhost', 1);
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SELECT 1 FROM master_disable_node('localhost', :worker_2_port);
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-- bring up node 1
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SELECT master_update_node(:nodeid_1, 'localhost', :worker_1_port);
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SELECT wait_until_metadata_sync();
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SELECT 1 FROM master_activate_node('localhost', :worker_2_port);
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SELECT verify_metadata('localhost', :worker_1_port);
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-- cleanup
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DROP TABLE ref_table;
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TRUNCATE pg_dist_colocation;
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SELECT count(*) FROM (SELECT master_remove_node(nodename, nodeport) FROM pg_dist_node) t;
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ALTER SEQUENCE pg_catalog.pg_dist_groupid_seq RESTART :last_group_id;
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ALTER SEQUENCE pg_catalog.pg_dist_node_nodeid_seq RESTART :last_node_id;
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ALTER SEQUENCE pg_catalog.pg_dist_colocationid_seq RESTART :last_colocation_id;
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ALTER SEQUENCE pg_catalog.pg_dist_placement_placementid_seq RESTART :last_placement_id;
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ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART :last_shard_id;
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RESET citus.shard_count;
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RESET citus.shard_replication_factor;
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RESET citus.replication_model;
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