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https://github.com/timescale/timescaledb.git
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79fb46456f
The timescale clustering code so far has been written referring to the remote databases as 'servers'. This terminology is a bit overloaded, and in particular we don't enforce any network topology limitations that the term 'server' would suggest. In light of this we've decided to change to use the term 'node' when referring to the different databases in a distributed database. Specifically we refer to the frontend as an 'access node' and to the backends as 'data nodes', though we may omit the access or data qualifier where it's unambiguous. As the vast bulk of the code so far has been written for the case where there was a single access node, almost all instances of 'server' were references to data nodes. This change has updated the code to rename those instances.
171 lines
7.9 KiB
SQL
171 lines
7.9 KiB
SQL
-- This file and its contents are licensed under the Timescale License.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-TIMESCALE for a copy of the license.
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-- Need to be super user to create extension and add data nodes
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\c :TEST_DBNAME :ROLE_SUPERUSER;
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ALTER ROLE :ROLE_DEFAULT_CLUSTER_USER CREATEDB PASSWORD 'pass';
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GRANT USAGE ON FOREIGN DATA WRAPPER timescaledb_fdw TO :ROLE_DEFAULT_CLUSTER_USER;
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-- This test sets explicit UUIDs on the frontends to guarantee stable test output
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GRANT ALL ON _timescaledb_catalog.metadata TO :ROLE_DEFAULT_CLUSTER_USER;
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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-- Cleanup from other potential tests that created these databases
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SET client_min_messages TO ERROR;
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DROP DATABASE IF EXISTS backend_1;
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DROP DATABASE IF EXISTS backend_2;
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DROP DATABASE IF EXISTS frontend_b;
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DROP DATABASE IF EXISTS backend_3;
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SET client_min_messages TO NOTICE;
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CREATE DATABASE backend_1;
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CREATE DATABASE backend_2;
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CREATE DATABASE backend_3;
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CREATE DATABASE frontend_b;
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\c backend_1
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SET client_min_messages TO ERROR;
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CREATE EXTENSION timescaledb;
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GRANT ALL ON _timescaledb_catalog.metadata TO :ROLE_DEFAULT_CLUSTER_USER;
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SET client_min_messages TO NOTICE;
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\c backend_2
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SET client_min_messages TO ERROR;
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CREATE EXTENSION timescaledb;
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GRANT ALL ON _timescaledb_catalog.metadata TO :ROLE_DEFAULT_CLUSTER_USER;
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SET client_min_messages TO NOTICE;
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\c backend_3
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SET client_min_messages TO ERROR;
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CREATE EXTENSION timescaledb;
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GRANT ALL ON _timescaledb_catalog.metadata TO :ROLE_DEFAULT_CLUSTER_USER;
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SET client_min_messages TO NOTICE;
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-- Create a second frontend database and add a backend to it
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\c frontend_b
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SET client_min_messages TO ERROR;
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CREATE EXTENSION timescaledb;
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SET client_min_messages TO NOTICE;
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ALTER ROLE :ROLE_DEFAULT_CLUSTER_USER CREATEDB PASSWORD 'pass';
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GRANT USAGE ON FOREIGN DATA WRAPPER timescaledb_fdw TO :ROLE_DEFAULT_CLUSTER_USER;
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GRANT ALL ON _timescaledb_catalog.metadata TO :ROLE_DEFAULT_CLUSTER_USER;
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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INSERT INTO _timescaledb_catalog.metadata VALUES ('uuid', '87c235e9-d857-4f16-b59f-7fbac9b87664', true) ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value;
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'uuid' OR key LIKE 'dist_uuid';
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SELECT * FROM add_data_node('data_node_1', database => 'backend_3', password => 'pass', if_not_exists => true);
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'uuid' OR key LIKE 'dist_uuid';
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-- Connect back to our original database and add a backend to it
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\c :TEST_DBNAME :ROLE_SUPERUSER;
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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INSERT INTO _timescaledb_catalog.metadata VALUES ('uuid', '77348176-09da-4a80-bc78-e31bdf5e63ec', true) ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value;
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'uuid' OR key LIKE 'dist_uuid';
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SELECT * FROM add_data_node('data_node_1', database => 'backend_1', password => 'pass', if_not_exists => true);
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'uuid' OR key LIKE 'dist_uuid';
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-- We now have two frontends with one backend each and one undistributed database
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-- Let's try some invalid configurations
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\set ON_ERROR_STOP 0
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-- Adding frontend as backend to a different frontend
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SELECT * FROM add_data_node('frontend_b', database => 'frontend_b', password => 'pass', if_not_exists => true);
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-- Adding backend from a different group as a backend
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SELECT * FROM add_data_node('server_b', database => 'backend_3', password => 'pass', if_not_exists => true);
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-- Adding a valid backend target but to an existing backend
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\c backend_1
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM add_data_node('data_node_2', database => 'backend_2', password => 'pass', if_not_exists => true);
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\c backend_2
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GRANT USAGE ON FOREIGN DATA WRAPPER timescaledb_fdw TO :ROLE_DEFAULT_CLUSTER_USER;
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'dist_uuid';
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-- Adding a frontend as a backend to a nondistributed node
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SELECT * FROM add_data_node('frontend_b', database => 'frontend_b', password => 'pass', if_not_exists => true);
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'dist_uuid';
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\set ON_ERROR_STOP 1
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-- Add a second backend to TEST_DB
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\c :TEST_DBNAME :ROLE_SUPERUSER;
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM add_data_node('data_node_2', database => 'backend_2', password => 'pass', if_not_exists => true);
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\c backend_2
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'dist_uuid';
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\c :TEST_DBNAME :ROLE_SUPERUSER;
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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-- Now remove a backend from this distributed database and then add it to the other cluster
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\c backend_1
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'dist_uuid';
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\c :TEST_DBNAME :ROLE_SUPERUSER;
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM delete_data_node('data_node_1', cascade => true);
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\c backend_1
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'dist_uuid';
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\c frontend_b
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'uuid' OR key LIKE 'dist_uuid';
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SELECT * FROM add_data_node('data_node_2', database => 'backend_1', password => 'pass', if_not_exists => true);
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\c backend_1
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'dist_uuid';
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-- Now remove both backends from frontend_b, then verify that they and frontend_b are now valid backends for TEST_DB
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\c frontend_b
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM delete_data_node('data_node_1', cascade => true);
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SELECT * FROM delete_data_node('data_node_2', cascade => true);
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'uuid' OR key LIKE 'dist_uuid';
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\c :TEST_DBNAME :ROLE_SUPERUSER;
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM add_data_node('data_node_1', database => 'backend_1', password => 'pass', if_not_exists => true);
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SELECT * FROM add_data_node('data_node_3', database => 'backend_3', password => 'pass', if_not_exists => true);
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SELECT * FROM add_data_node('data_node_4', database => 'frontend_b', password => 'pass', if_not_exists => true);
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\c frontend_b
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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SELECT * FROM _timescaledb_catalog.metadata WHERE key LIKE 'uuid' OR key LIKE 'dist_uuid';
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\c :TEST_DBNAME :ROLE_SUPERUSER;
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SET ROLE :ROLE_DEFAULT_CLUSTER_USER;
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-- Test space reporting functions for distributed and non-distributed tables
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CREATE TABLE nondisttable(time timestamptz PRIMARY KEY, device int CHECK (device > 0), temp float);
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CREATE TABLE disttable(time timestamptz PRIMARY KEY, device int CHECK (device > 0), temp float);
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SELECT * FROM create_hypertable('nondisttable', 'time');
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SELECT * FROM create_distributed_hypertable('disttable', 'time');
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INSERT INTO nondisttable VALUES
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('2017-01-01 06:01', 1, 1.1),
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('2017-01-01 08:01', 1, 1.2),
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('2018-01-02 08:01', 2, 1.3),
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('2019-01-01 09:11', 3, 2.1),
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('2017-01-01 06:05', 1, 1.4);
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INSERT INTO disttable VALUES
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('2017-01-01 06:01', 1, 1.1),
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('2017-01-01 08:01', 1, 1.2),
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('2018-01-02 08:01', 2, 1.3),
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('2019-01-01 09:11', 3, 2.1),
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('2017-01-01 06:05', 1, 1.4);
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SELECT * FROM timescaledb_information.data_node;
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SELECT * FROM timescaledb_information.hypertable;
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SELECT * FROM hypertable_relation_size('disttable');
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SELECT * FROM hypertable_relation_size('nondisttable');
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SELECT * FROM hypertable_data_node_relation_size('disttable');
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SELECT * FROM hypertable_data_node_relation_size('nondisttable');
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-- Clean up for future tests
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DROP TABLE disttable;
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SELECT * FROM delete_data_node('data_node_1', cascade => true);
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SELECT * FROM delete_data_node('data_node_2', cascade => true);
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SELECT * FROM delete_data_node('data_node_3', cascade => true);
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SELECT * FROM delete_data_node('data_node_4', cascade => true);
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DROP DATABASE frontend_b;
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DROP DATABASE backend_1;
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DROP DATABASE backend_2;
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DROP DATABASE backend_3;
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