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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>
106 lines
3.7 KiB
PHP
106 lines
3.7 KiB
PHP
# ==== Purpose ====
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#
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# Setup replication from an existing relay log in the current
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# connection.
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#
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# ==== Usage ====
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#
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# Make sure the slave is not running and issue:
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#
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# let $fake_relay_log= /path/to/fake-relay-log-file.000001
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# source include/setup_fake_relay_log.inc;
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# START SLAVE SQL_THREAD; # setup_fake_relay_log doesn't start slave
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# ...
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# source include/cleanup_fake_relay_log.inc
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#
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# You must run the server with --relay-log=FILE. You probably want to
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# run with --replicate-same-server-id too.
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#
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# ==== Implementation ====
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#
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# First makes a sanity check, ensuring that the slave threads are not
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# running. Then copies the $fake_relay_log to RELAY_BIN-fake.000001,
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# where RELAY_BIN is the basename of the relay log, and updates
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# RELAY_BIN.index. Finally issues CHANGE MASTER so that it uses the
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# given files.
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#
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# ==== Side effects ====
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#
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# Creates a binlog file and a binlog index file, and sets
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# @@global.relay_log_purge=1. All this is restored when you call
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# cleanup_fake_relay_log.inc.
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--let $include_filename= setup_fake_relay_log.inc
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--source include/begin_include_file.inc
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if (!$rpl_debug)
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{
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--disable_query_log
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}
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# Print message.
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let $_fake_relay_log_printable= `SELECT REPLACE('$fake_relay_log', '$MYSQL_TEST_DIR', 'MYSQL_TEST_DIR')`;
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--echo Setting up fake replication from $_fake_relay_log_printable
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# Sanity check.
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let $running= 0;
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let $_sql_running= query_get_value(SHOW SLAVE STATUS, Slave_SQL_Running, 1);
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let $_io_running= query_get_value(SHOW SLAVE STATUS, Slave_IO_Running, 1);
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if ($_sql_running == Yes) {
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let $running= 1;
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}
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if ($_io_running == Yes) {
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let $running= 1;
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}
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if ($running) {
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--echo Error: Slave was running when test case sourced
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--echo include/setup_fake_replication.inc
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--echo Slave_IO_Running = $_io_running; Slave_SQL_Running = $_sql_running
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--source include/show_rpl_debug_info.inc
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--die
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}
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# Read server variables.
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let $_fake_datadir= `SELECT @@datadir`;
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let $_fake_filename= query_get_value(SHOW VARIABLES LIKE 'relay_log', Value, 1);
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if (!$_fake_filename) {
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--die ERROR IN TEST: relay_log variable is empty. Please use the server option --relay-log=FILE.
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}
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let $_fake_relay_log= $_fake_datadir/$_fake_filename-fake.000001;
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let $_fake_relay_index= $_fake_datadir/$_fake_filename.index;
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# Need to restore relay_log_purge in cleanup_fake_relay_log.inc, since
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# CHANGE MASTER modifies it (see the manual for CHANGE MASTER).
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let $_fake_relay_log_purge= `SELECT @@global.relay_log_purge`;
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RESET SLAVE;
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# Create relay log file.
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--copy_file $fake_relay_log $_fake_relay_log
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# Create relay log index.
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# After patch for BUG#12190, the filename used in CHANGE MASTER
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# RELAY_LOG_FILE will be automatically added the directory of the
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# relay log before comparison, thus we need to added the directory
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# part (./ on unix .\ on windows) when faking the relay-log-bin.index.
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# mysqltest currently parses backslash escapes wrong, so any sequence
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# of N backslashes is collapsed to just one backslash. So we use the
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# SQL function CHAR() to generate a backslash character instead. Since
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# the string is interpreted in SQL context, we to escape it, so we use
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# two backslashes.
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--let $_fake_dir= `select IF(convert(@@version_compile_os using latin1) IN ("Win32","Win64","Windows"), CONCAT('.', CHAR(92), CHAR(92)), './')`
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--let $write_var= $_fake_dir$_fake_filename-fake.000001\n
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--let $write_to_file= $_fake_relay_index
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--source include/write_var_to_file.inc
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# Remember old settings.
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--let $_fake_old_master_host= query_get_value(SHOW SLAVE STATUS, Master_Host, 1)
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# Setup replication from existing relay log.
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eval CHANGE MASTER TO MASTER_HOST='dummy.localdomain', RELAY_LOG_FILE='$_fake_filename-fake.000001', RELAY_LOG_POS=4, MASTER_USE_GTID=NO;
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--let $include_filename= setup_fake_relay_log.inc
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--source include/end_include_file.inc
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