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09c80e12c5
Major replication test framework cleanup. This does the following:
- Ensure that all tests clean up the replication state when they
finish, by making check-testcase check the output of SHOW SLAVE STATUS.
This implies:
- Slave must not be running after test finished. This is good
because it removes the risk for sporadic errors in subsequent
tests when a test forgets to sync correctly.
- Slave SQL and IO errors must be cleared when test ends. This is
good because we will notice if a test gets an unexpected error in
the slave threads near the end.
- We no longer have to clean up before a test starts.
- Ensure that all tests that wait for an error in one of the slave
threads waits for a specific error. It is no longer possible to
source wait_for_slave_[sql|io]_to_stop.inc when there is an error
in one of the slave threads. This is good because:
- If a test expects an error but there is a bug that causes
another error to happen, or if it stops the slave thread without
an error, then we will notice.
- When developing tests, wait_for_*_to_[start|stop].inc will fail
immediately if there is an error in the relevant slave thread.
Before this patch, we had to wait for the timeout.
- Remove duplicated and repeated code for setting up unusual replication
topologies. Now, there is a single file that is capable of setting
up arbitrary topologies (include/rpl_init.inc, but
include/master-slave.inc is still available for the most common
topology). Tests can now end with include/rpl_end.inc, which will clean
up correctly no matter what topology is used. The topology can be
changed with include/rpl_change_topology.inc.
- Improved debug information when tests fail. This includes:
- debug info is printed on all servers configured by include/rpl_init.inc
- User can set $rpl_debug=1, which makes auxiliary replication files
print relevant debug info.
- Improved documentation for all auxiliary replication files. Now they
describe purpose, usage, parameters, and side effects.
- Many small code cleanups:
- Made have_innodb.inc output a sensible error message.
- Moved contents of rpl000017-slave.sh into rpl000017.test
- Added mysqltest variables that expose the current state of
disable_warnings/enable_warnings and friends.
- Too many to list here: see per-file comments for details.
84 lines
2.9 KiB
PHP
84 lines
2.9 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 $_sql_running= query_get_value(SHOW SLAVE STATUS, Slave_SQL_Running, 1);
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let $_io_running= query_get_value(SHOW SLAVE STATUS, Slave_IO_Running, 1);
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if (`SELECT "$_sql_running" = "Yes" OR "$_io_running" = "Yes"`) {
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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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# 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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--let $write_var= $_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;
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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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