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115 lines
3.8 KiB
PHP
115 lines
3.8 KiB
PHP
# ==== Purpose ====
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#
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# Waits until SHOW SLAVE STATUS has returned a specified value, or
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# until a timeout is reached.
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#
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#
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# ==== Usage ====
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#
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# --let $slave_param= Slave_SQL_Running
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# --let $slave_param_value= No
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# [--let $slave_param_comparison= [ < | <= | >= | > | = | != ]]
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# [--let $slave_timeout= NUMBER]
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# [--let $slave_error_param= [Slave_SQL_Errno | Slave_IO_Errno]]
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# [--let $rpl_debug= 1]
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# --source include/wait_for_slave_param.inc
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#
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# Parameters:
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#
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# $slave_param, $slave_param_value
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# This macro will wait until the column of the output of SHOW SLAVE
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# STATUS named $slave_param gets the value $slave_param_value. See
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# the example above.
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#
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# $slave_param_comparison
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# By default, this file waits until $slave_param becomes equal to
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# $slave_param_value. If you want to wait until $slave_param
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# becomes *unequal* to $slave_param_value, set this parameter to the
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# string '!=', like this:
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# --let $slave_param_comparison= !=
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#
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# $slave_timeout
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# The default timeout is 5 minutes. You can change the timeout by
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# setting $slave_timeout. The unit is seconds.
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#
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# $slave_error_param
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# If set, this script will check if the column of the output from
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# SHOW SLAVE STATUS named $slave_error_param is nonzero. If it is,
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# this script will fail immediately. Typically, this should be set
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# to Last_IO_Errno or Last_SQL_Errno.
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#
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# $rpl_debug
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# See include/rpl_init.inc
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--let $include_filename= wait_for_slave_param.inc [$slave_param]
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--source include/begin_include_file.inc
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let $_slave_timeout= $slave_timeout;
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if (!$_slave_timeout)
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{
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source include/slow_environ.inc;
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let $_slave_timeout= 300$_timeout_adjustment;
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}
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let $_slave_param_comparison= $slave_param_comparison;
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if (!$_slave_param_comparison)
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{
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let $_slave_param_comparison= =;
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}
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if ($rpl_debug)
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{
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--echo Waiting until '$slave_param' $_slave_param_comparison '$slave_param_value' [\$slave_error_param='$slave_error_param']
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}
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--let $_slave_check_configured= query_get_value("SHOW SLAVE STATUS", Slave_IO_Running, 1)
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if ($_slave_check_configured == 'No such row')
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{
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--echo **** ERROR: SHOW SLAVE STATUS returned empty result set. Slave not configured. ****
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--source include/show_rpl_debug_info.inc
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--die SHOW SLAVE STATUS returned empty result set. Slave not configured.
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}
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# mysqltest doesn't provide any better way to multiply by 10
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--let $_wait_for_slave_param_zero= 0
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--let $_slave_timeout_counter= $_slave_timeout$_wait_for_slave_param_zero
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--let $_slave_continue= 1
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while ($_slave_continue)
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{
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--let $_show_slave_status_value= query_get_value("SHOW SLAVE STATUS", $slave_param, 1)
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# Check if an error condition is reached.
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if ($slave_error_param)
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{
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--let $_show_slave_status_error_value= query_get_value("SHOW SLAVE STATUS", $slave_error_param, 1)
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if ($_show_slave_status_error_value)
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{
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--echo **** ERROR: $slave_error_param = '$_show_slave_status_error_value' while waiting for slave parameter $slave_param $_slave_param_comparison $slave_param_value ****
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--source include/show_rpl_debug_info.inc
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--die Error condition reached in include/wait_for_slave_param.inc
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}
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}
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# Check if the termination condition is reached.
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--let $_slave_continue= `SELECT NOT('$_show_slave_status_value' $_slave_param_comparison '$slave_param_value')`
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# Decrease timer, and check if the timeout is reached.
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if ($_slave_continue)
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{
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--dec $_slave_timeout_counter
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if (!$_slave_timeout_counter)
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{
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--echo **** ERROR: timeout after $_slave_timeout seconds while waiting for slave parameter $slave_param $_slave_param_comparison $slave_param_value ****
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--source include/show_rpl_debug_info.inc
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--die Timeout in include/wait_for_slave_param.inc
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}
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--sleep 0.1
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}
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}
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--let $include_filename= wait_for_slave_param.inc [$slave_param]
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--source include/end_include_file.inc
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