pgbouncer_fdw

pig repo add pgdg -u    # add pgdg repo and update cache

pig install pgbouncer_fdw;		# install via package name, for the active PG version

pig install pgbouncer_fdw -v 18;   # install for PG 18
pig install pgbouncer_fdw -v 17;   # install for PG 17
pig install pgbouncer_fdw -v 16;   # install for PG 16
pig install pgbouncer_fdw -v 15;   # install for PG 15
pig install pgbouncer_fdw -v 14;   # install for PG 14

CREATE EXTENSION pgbouncer_fdw CASCADE; -- requires dblink

CREATE EXTENSION pgbouncer_fdw;

CREATE SERVER pgbouncer FOREIGN DATA WRAPPER dblink_fdw
  OPTIONS (host 'localhost', port '6432', dbname 'pgbouncer');

CREATE SERVER pgbouncer1 FOREIGN DATA WRAPPER dblink_fdw
  OPTIONS (host '192.168.1.10', port '6432', dbname 'pgbouncer');
CREATE SERVER pgbouncer2 FOREIGN DATA WRAPPER dblink_fdw
  OPTIONS (host '192.168.1.11', port '6432', dbname 'pgbouncer');

INSERT INTO pgbouncer_fdw_targets (target_host) VALUES ('pgbouncer1'), ('pgbouncer2');
UPDATE pgbouncer_fdw_targets SET active = false WHERE target_host = 'pgbouncer';

CREATE USER MAPPING FOR PUBLIC SERVER pgbouncer
  OPTIONS (user 'ccp_monitoring', password 'mypassword');

SELECT * FROM pgbouncer_pools;
SELECT * FROM pgbouncer_stats;
SELECT database, cl_active, cl_waiting, sv_active FROM pgbouncer_pools;

SELECT pgbouncer_command_reload();              -- Reload configuration
SELECT pgbouncer_command_pause('mydb');          -- Pause a database
SELECT pgbouncer_command_resume('mydb');         -- Resume a database
SELECT pgbouncer_command_kill('mydb');           -- Kill connections
SELECT pgbouncer_command_disable('mydb');        -- Disable a database
SELECT pgbouncer_command_enable('mydb');         -- Enable a database
SELECT pgbouncer_command_reconnect('mydb');      -- Reconnect to backend
SELECT pgbouncer_command_set('key', 'value');    -- Set a parameter
SELECT pgbouncer_command_shutdown();             -- Shutdown PgBouncer
SELECT pgbouncer_command_suspend();              -- Suspend operations
SELECT pgbouncer_command_wait_close('mydb');     -- Wait for connections to close

GRANT USAGE ON FOREIGN SERVER pgbouncer TO monitoring_user;
GRANT SELECT ON pgbouncer_pools TO monitoring_user;
GRANT SELECT ON pgbouncer_stats TO monitoring_user;
GRANT EXECUTE ON FUNCTION pgbouncer_command_reload() TO admin_user;