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Diffstat (limited to 'mysql-test/include/rpl_change_topology.inc')
| -rw-r--r-- | mysql-test/include/rpl_change_topology.inc | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/mysql-test/include/rpl_change_topology.inc b/mysql-test/include/rpl_change_topology.inc new file mode 100644 index 00000000000..d25ebfbf25c --- /dev/null +++ b/mysql-test/include/rpl_change_topology.inc @@ -0,0 +1,248 @@ +# ==== 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 |