249 lines
9.7 KiB
PHP
249 lines
9.7 KiB
PHP
|
# ==== Purpose ====
|
||
|
|
#
|
||
|
|
# Changes replication topology. This file is normally sourced from
|
||
|
|
# include/rpl_init.inc, but test cases can also source it if they
|
||
|
|
# need to change topology after they have sourced include/rpl_init.inc
|
||
|
|
#
|
||
|
|
# This file sets up variables needed by include/rpl_sync.inc and many
|
||
|
|
# other replication scripts in the include/ directory. It also issues
|
||
|
|
# CHANGE MASTER on all servers where the configuration changes from
|
||
|
|
# what it was before. It does not issue START SLAVE (use
|
||
|
|
# include/rpl_start_slaves.inc for that).
|
||
|
|
#
|
||
|
|
# Note: it is not currently possible to change the number of servers
|
||
|
|
# after the rpl_init.inc, without first calling rpl_end.inc. So the
|
||
|
|
# test has to set $rpl_server_count to the total number of servers
|
||
|
|
# that the test uses, before it sources include/rpl_init.inc. After
|
||
|
|
# that, $rpl_server_count must not change until after next time the
|
||
|
|
# test sources include/rpl_end.inc.
|
||
|
|
#
|
||
|
|
# Note: Since this script issues CHANGE MASTER, the test case must
|
||
|
|
# ensure that all slaves where the configuration changes have stopped
|
||
|
|
# both the IO thread and the SQL thread before this script is sourced.
|
||
|
|
#
|
||
|
|
#
|
||
|
|
# ==== Usage ====
|
||
|
|
#
|
||
|
|
# [--let $rpl_server_count= 7]
|
||
|
|
# --let $rpl_topology= 1->2->3->1->4, 2->5, 6->7
|
||
|
|
# [--let $rpl_skip_change_master= 1]
|
||
|
|
# [--let $rpl_master_log_file= 1:master-bin.000001,3:master-bin.000003]
|
||
|
|
# [--let $rpl_master_log_pos= 1:4711,3:107]
|
||
|
|
# [--let $rpl_debug= 1]
|
||
|
|
# --source include/rpl_change_topology.inc
|
||
|
|
#
|
||
|
|
# Parameters:
|
||
|
|
# $rpl_master_log_file
|
||
|
|
# By default, CHANGE MASTER is executed with MASTER_LOG_FILE set
|
||
|
|
# to the name of the last binlog file on the master (retrieved by
|
||
|
|
# executing SHOW MASTER STATUS). This variable can be set to
|
||
|
|
# specify another filename. This variable should be a
|
||
|
|
# comma-separated list of the following form:
|
||
|
|
#
|
||
|
|
# SERVER_NUMBER_1:FILE_NAME_1,SERVER_NUMBER_2:FILE_NAME_2,...
|
||
|
|
#
|
||
|
|
# Before CHANGE MASTER is executed on server N, this script checks
|
||
|
|
# if $rpl_master_log_file contains the text N:FILE_NAME. If it
|
||
|
|
# does, then MASTER_LOG_FILE is set to FILE_NAME. Otherwise,
|
||
|
|
# MASTER_LOG_FILE is set to the last binlog on the master. For
|
||
|
|
# example, to specify that server_1 should start replicate from
|
||
|
|
# master-bin.000007 and server_5 should start replicate from
|
||
|
|
# master-bin.012345, do:
|
||
|
|
# --let $rpl_master_log_file= 1:master-bin.000007,5:master-bin.012345
|
||
|
|
#
|
||
|
|
# $rpl_master_log_pos
|
||
|
|
# By default, CHANGE MASTER is executed without specifying the
|
||
|
|
# MASTER_LOG_POS parameter. This variable can be set to set a
|
||
|
|
# specific position. It has the same form as $rpl_master_log_file
|
||
|
|
# (see above). For example, to specify that server_3 should start
|
||
|
|
# replicate from position 4711 of its master, do:
|
||
|
|
# --let $rpl_master_log_pos= 3:4711
|
||
|
|
#
|
||
|
|
# $rpl_server_count, $rpl_topology, $rpl_debug, $rpl_skip_change_master
|
||
|
|
# See include/rpl_init.inc
|
||
|
|
#
|
||
|
|
#
|
||
|
|
# ==== Internal variables configured by this file ====
|
||
|
|
#
|
||
|
|
# This file sets up the following variables, which are used by other
|
||
|
|
# low-level replication files such as:
|
||
|
|
# include/rpl_sync.inc
|
||
|
|
# include/rpl_start_slaves.inc
|
||
|
|
# include/rpl_stop_slaves.inc
|
||
|
|
# include/rpl_end.inc
|
||
|
|
#
|
||
|
|
# $rpl_server_count_length:
|
||
|
|
# Set to LENGTH($rpl_server_count). So if $rpl_server_count < 10,
|
||
|
|
# then $rpl_server_count_length = 1; if 10 <= $rpl_server_count <
|
||
|
|
# 100, then $rpl_server_count_length = 2, etc.
|
||
|
|
#
|
||
|
|
# $rpl_master_list
|
||
|
|
# Set to a string consisting of $rpl_server_count numbers, each one
|
||
|
|
# whitespace-padded to $rpl_server_count_length characters. If
|
||
|
|
# server N is a slave, then the N'th number is the master of server
|
||
|
|
# N. If server N is not a slave, then the N'th number is just spaces
|
||
|
|
# (so in fact it is not a number). For example, if $rpl_topology is
|
||
|
|
# '1->2,2->3,3->1,2->4,5->6', then $rpl_master_list is '3122 6'.
|
||
|
|
#
|
||
|
|
# $rpl_sync_chain_dirty
|
||
|
|
# This variable is set to 1. This tells include/rpl_sync.inc to
|
||
|
|
# compute a new value for $rpl_sync_chain next time that
|
||
|
|
# include/rpl_sync.inc is sourced. See
|
||
|
|
# include/rpl_generate_sync_chain.inc and include/rpl_sync.inc for
|
||
|
|
# details.
|
||
|
|
|
||
|
|
|
||
|
|
# Remove whitespace from $rpl_topology
|
||
|
|
--let $rpl_topology= `SELECT REPLACE('$rpl_topology', ' ', '')`
|
||
|
|
|
||
|
|
--let $include_filename= rpl_change_topology.inc [new topology=$rpl_topology]
|
||
|
|
--source include/begin_include_file.inc
|
||
|
|
|
||
|
|
|
||
|
|
if ($rpl_debug)
|
||
|
|
{
|
||
|
|
--echo ---- Check input ----
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
if (`SELECT '$rpl_topology' = '' OR '$rpl_server_count' = ''`)
|
||
|
|
{
|
||
|
|
--die You must set $rpl_topology and $rpl_server_count before you source rpl_change_topology.inc. If you really want to change to the empty topology, set $rpl_topology= none
|
||
|
|
}
|
||
|
|
--let $_rpl_topology= $rpl_topology
|
||
|
|
if (`SELECT '$_rpl_topology' = 'none'`)
|
||
|
|
{
|
||
|
|
--let $_rpl_topology=
|
||
|
|
}
|
||
|
|
if (`SELECT '!$rpl_master_list!' = '!!'`)
|
||
|
|
{
|
||
|
|
--die You must source include/rpl_init.inc before you source include/rpl_change_topology.inc
|
||
|
|
}
|
||
|
|
--let $_rpl_old_master_list= $rpl_master_list
|
||
|
|
|
||
|
|
if ($rpl_debug)
|
||
|
|
{
|
||
|
|
--echo \$rpl_server_count='$rpl_server_count'
|
||
|
|
--echo \$rpl_server_count_length='$rpl_server_count_length'
|
||
|
|
--echo new \$rpl_topology='$_rpl_topology'
|
||
|
|
--echo old \$rpl_master_list='$rpl_master_list'
|
||
|
|
--echo old \$rpl_sync_chain='$rpl_sync_chain'
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
if ($rpl_debug)
|
||
|
|
{
|
||
|
|
--echo ---- Generate \$rpl_server_count_length and \$rpl_master_list ----
|
||
|
|
}
|
||
|
|
|
||
|
|
--let $rpl_server_count_length= `SELECT LENGTH('$rpl_server_count')`
|
||
|
|
--let $rpl_master_list=
|
||
|
|
--let $_rpl_no_server= `SELECT REPEAT(' ', $rpl_server_count_length)`
|
||
|
|
--let $rpl_master_list= `SELECT REPEAT('$_rpl_no_server', $rpl_server_count)`
|
||
|
|
while ($_rpl_topology)
|
||
|
|
{
|
||
|
|
# Get 's1->s2' from 's1->s2->s3->...' or from 's1->s2,s3->s4,...'
|
||
|
|
--let $_rpl_master_slave= `SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('$_rpl_topology', ',', 1), '->', 2)`
|
||
|
|
# Modify $_rpl_topology as follows:
|
||
|
|
# - If it starts with 's1->s2,', remove 's1->s2,'
|
||
|
|
# - If it starts with 's1->s2->', remove 's1->'
|
||
|
|
# - If it is equal to 's1->s2', remove 's1->s2'
|
||
|
|
--let $_rpl_topology= `SELECT SUBSTR('$_rpl_topology', IF(SUBSTR('$_rpl_topology', LENGTH('$_rpl_master_slave') + 1, 2) != '->', LENGTH('$_rpl_master_slave'), LOCATE('->', '$_rpl_master_slave')) + 2)`
|
||
|
|
# Get 's1' from 's1->s2'
|
||
|
|
--let $_rpl_master= `SELECT SUBSTRING_INDEX('$_rpl_master_slave', '->', 1)`
|
||
|
|
# Get 's2' from 's1->s2'
|
||
|
|
--let $_rpl_slave= `SELECT SUBSTRING('$_rpl_master_slave', LENGTH('$_rpl_master') + 3)`
|
||
|
|
# Check that s2 does not have another master.
|
||
|
|
if (`SELECT SUBSTR('$rpl_master_list', 1 + ($_rpl_slave - 1) * $rpl_server_count_length, $rpl_server_count_length) != '$_rpl_no_server'`)
|
||
|
|
{
|
||
|
|
--echo ERROR IN TEST: Server '$_rpl_slave' has more than one master in topology '$rpl_topology'
|
||
|
|
--die ERROR IN TEST: found a server with more than one master in the $rpl_topology variable
|
||
|
|
}
|
||
|
|
# Save 's1' at position 's2' in $rpl_master_list
|
||
|
|
--let $rpl_master_list= `SELECT INSERT('$rpl_master_list', 1 + ($_rpl_slave - 1) * $rpl_server_count_length, $rpl_server_count_length, RPAD('$_rpl_master', $rpl_server_count_length, ' '))`
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($rpl_debug)
|
||
|
|
{
|
||
|
|
--echo new \$rpl_server_count_length = '$rpl_server_count_length'
|
||
|
|
--echo new \$rpl_master_list = '$rpl_master_list'
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!$rpl_skip_change_master)
|
||
|
|
{
|
||
|
|
if ($rpl_debug)
|
||
|
|
{
|
||
|
|
--echo ---- Execute CHANGE MASTER on all servers ----
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!$rpl_debug)
|
||
|
|
{
|
||
|
|
--disable_query_log
|
||
|
|
}
|
||
|
|
|
||
|
|
--let $_rpl_server= $rpl_server_count
|
||
|
|
while ($_rpl_server)
|
||
|
|
{
|
||
|
|
# The following statement evaluates to:
|
||
|
|
# 0, if server_$_rpl_server has the same master as before.
|
||
|
|
# The master's server, if server_$_rpl_server is a slave.
|
||
|
|
# The empty string, if server_$_rpl_server is not a slave.
|
||
|
|
--let $_rpl_master= `SELECT TRIM(IFNULL(NULLIF(SUBSTRING('$rpl_master_list', 1 + ($_rpl_server - 1) * $rpl_server_count_length, $rpl_server_count_length), SUBSTRING('$_rpl_old_master_list', 1 + ($_rpl_server - 1) * $rpl_server_count_length, $rpl_server_count_length)), 0))`
|
||
|
|
if ($rpl_debug)
|
||
|
|
{
|
||
|
|
--echo \$_rpl_server='$_rpl_server' \$_rpl_master='$_rpl_master'
|
||
|
|
}
|
||
|
|
if ($_rpl_master)
|
||
|
|
{
|
||
|
|
# Get port number
|
||
|
|
--let $_rpl_port= \$SERVER_MYPORT_$_rpl_master
|
||
|
|
# Get MASTER_LOG_FILE
|
||
|
|
--let $_rpl_master_log_file_index= `SELECT LOCATE('$_rpl_server:', '$rpl_master_log_file')`
|
||
|
|
if ($_rpl_master_log_file_index)
|
||
|
|
{
|
||
|
|
# Get text from after ':' and before ',', starting at
|
||
|
|
# $_rpl_master_log_file
|
||
|
|
--let $_rpl_master_log_file= `SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(SUBSTRING('$rpl_master_log_file', $_rpl_master_log_file_index), ',', 1), ':', -1)`
|
||
|
|
}
|
||
|
|
if (!$_rpl_master_log_file_index)
|
||
|
|
{
|
||
|
|
--let $rpl_connection_name= server_$_rpl_master
|
||
|
|
--source include/rpl_connection.inc
|
||
|
|
--let $_rpl_master_log_file= query_get_value(SHOW MASTER STATUS, File, 1)
|
||
|
|
}
|
||
|
|
# Change connection.
|
||
|
|
--let $rpl_connection_name= server_$_rpl_server
|
||
|
|
--source include/rpl_connection.inc
|
||
|
|
# Get MASTER_LOG_POS
|
||
|
|
--let $_rpl_master_log_pos_index= `SELECT LOCATE('$_rpl_server:', '$rpl_master_log_pos')`
|
||
|
|
if ($_rpl_master_log_pos_index)
|
||
|
|
{
|
||
|
|
--let $_rpl_master_log_pos= `SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(SUBSTRING('$rpl_master_log_pos', $_rpl_master_log_pos_index), ',', 1), ':', -1)`
|
||
|
|
--let $_rpl_master_log_pos= , MASTER_LOG_POS = $_rpl_master_log_pos
|
||
|
|
}
|
||
|
|
if (!$_rpl_master_log_pos_index)
|
||
|
|
{
|
||
|
|
--let $_rpl_master_log_pos=
|
||
|
|
}
|
||
|
|
eval CHANGE MASTER TO MASTER_HOST = '127.0.0.1', MASTER_PORT = $_rpl_port, MASTER_USER = 'root', MASTER_LOG_FILE = '$_rpl_master_log_file'$_rpl_master_log_pos, MASTER_CONNECT_RETRY = 1;
|
||
|
|
}
|
||
|
|
if (!$_rpl_master)
|
||
|
|
{
|
||
|
|
if (`SELECT '$_rpl_master' = ''`)
|
||
|
|
{
|
||
|
|
--let $rpl_connection_name= server_$_rpl_server
|
||
|
|
--source include/rpl_connection.inc
|
||
|
|
CHANGE MASTER TO MASTER_HOST = '';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
--dec $_rpl_server
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
--let $rpl_sync_chain_dirty= 1
|
||
|
|
|
||
|
|
|
||
|
|
--let $include_filename= rpl_change_topology.inc
|
||
|
|
--source include/end_include_file.inc
|