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5ab5ff08b0
This commit makes replicas crash-safe by default by changing the Using_Gtid value to be Slave_Pos on a fresh slave start and after RESET SLAVE is issued. If the primary server does not support GTIDs (i.e., version < 10), the replica will fall back to Using_Gtid=No on slave start and after RESET SLAVE. The following additional informational messages/warnings are added: 1. When Using_Gtid is automatically changed. That is, if RESET SLAVE reverts Using_Gtid back to Slave_Pos, or Using_Gtid is inferred to No from a CHANGE MASTER TO given with log coordinates without MASTER_USE_GTID. 2. If options are ignored in CHANGE MASTER TO. If CHANGE MASTER TO is given with log coordinates, yet also specifies MASTER_USE_GTID=Slave_Pos, a warning message is given that the log coordinate options are ignored. Additionally, an MTR macro has been added for RESET SLAVE, reset_slave.inc, which provides modes/options for resetting a slave in log coordinate or gtid modes. When in log coordinates mode, the macro will execute CHANGE MASTER TO MASTER_USE_GTID=No after the RESET SLAVE command. When in GTID mode, an extra parameter, reset_slave_keep_gtid_state, can be set to reset or preserve the value of gtid_slave_pos. Reviewed By: =========== Andrei Elkin <andrei.elkin@mariadb.com>
81 lines
2 KiB
PHP
81 lines
2 KiB
PHP
# ==== Purpose ====
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#
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# Reset all replication servers to a clean state:
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#
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# - sync all slaves,
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# - stop all slaves (STOP SLAVE),
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# - remove all binlogs and relay logs (RESET MASTER and RESET SLAVE),
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# - start all slaves again (START SLAVE).
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#
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# It does not execute CHANGE MASTER, so the replication topology is
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# kept intact.
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#
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#
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# ==== Usage ====
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#
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# [--let $rpl_only_running_threads= 1]
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# [--let $rpl_debug= 1]
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# [--let $slave_timeout= NUMBER]
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# --source include/rpl_end.inc
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#
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# Parameters:
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# $rpl_only_running_threads
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# If one or both of the IO and SQL threads is stopped, sync and
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# stop only the threads that are running. See
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# include/rpl_sync.inc and include/stop_slave.inc for details.
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#
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# $rpl_debug
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# See include/rpl_init.inc
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#
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# $slave_timeout
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# Set the timeout when waiting for slave threads to stop and
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# start, respectively. See include/wait_for_slave_param.inc
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#
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# Note:
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# This script will fail if Last_SQL_Error or Last_IO_Error is
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# nonempty. If you expect an error in the SQL thread, you should
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# normally do this before you source include/rpl_reset.inc:
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#
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# --source include/wait_for_slave_sql_error.inc
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# --source include/stop_slave_io.inc
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# RESET SLAVE;
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--let $include_filename= rpl_reset.inc
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--source include/begin_include_file.inc
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if (!$rpl_debug)
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{
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--disable_query_log
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}
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--source include/rpl_sync.inc
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if ($rpl_debug)
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{
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--echo ---- Stop and reset all servers ----
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}
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--let $_rpl_server= $rpl_server_count
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while ($_rpl_server)
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{
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--let $rpl_connection_name= server_$_rpl_server
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--source include/rpl_connection.inc
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RESET MASTER;
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# Check if this server is configured to have a master
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if (`SELECT SUBSTRING('$rpl_master_list', 1 + ($_rpl_server - 1) * $rpl_server_count_length, $rpl_server_count_length) != ''`)
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{
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--source include/stop_slave.inc
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--source include/reset_slave.inc
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}
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--dec $_rpl_server
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}
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--source include/rpl_start_slaves.inc
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--let $include_filename= rpl_reset.inc
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--source include/end_include_file.inc
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