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|
# ==== Purpose ====
#
# Set up replication on several servers in a specified topology.
#
# By default, this script does the following:
# - Creates the connections server_1, server_2, ..., server_N.
# - Calls RESET MASTER, RESET SLAVE, USE test, CHANGE MASTER, START SLAVE.
# - Sets the connection to server_1 before exiting.
# With $rpl_check_server_ids parameter, the script does the following:
# - Verifies that @@server_id of all servers are different.
#
# ==== Usage ====
#
# 1. If you are going to use more than two servers, create
# rpl_test.cnf with the following contents:
#
# !include ../my.cnf
# [mysqld.1]
# log-slave-updates
# [mysqld.2]
# log-slave-updates
# ...
# [mysqld.N]
# log-slave-updates
#
# [ENV]
# SERVER_MYPORT_3= @mysqld.3.port
# SERVER_MYPORT_4= @mysqld.4.port
# SERVER_MYPORT_5= @mysqld.5.port
# ...
# SERVER_MYPORT_N= @mysqld.N.port
#
# (It is allowed, but not required, to configure SERVER_MYPORT_1
# and SERVER_MYPORT_2 too. If these variables are not set, the
# variables MASTER_MYPORT and SLAVE_MYPORT are used instead.
# These variables are configured in the rpl_1slave_base.cnf,
# that is used in the default my.cnf, which is used by the rpl suite.)
#
# 2. Execute the following near the top of the test:
#
# [--let $rpl_server_count= 7]
# --let $rpl_topology= 1->2->3->1->4, 2->5, 6->7
# [--let $rpl_check_server_ids= 1]
# [--let $rpl_skip_change_master= 1]
# [--let $rpl_skip_start_slave= 1]
# [--let $rpl_skip_reset_master_and_slave= 1]
# [--let $rpl_debug= 1]
# [--let $slave_timeout= NUMBER]
# --source include/rpl_init.inc
#
# Parameters:
#
# $rpl_server_count
# The number of servers to configure. If this is not set, the largest
# number in $rpl_topology will be used.
#
# $rpl_topology
# A comma-separated list of replication chain
# specifications. Each replication chain specification has the
# form S1->S2->...->Sn, where 1 <= S1,...Sn <= $rpl_server_count.
# This file will configure S(i+1) to be a slave of S(i). If you
# want to specify the empty topology (no server replicates at
# all), you have to set $rpl_topology=none.
#
# $rpl_check_server_ids
# If $rpl_check_server_ids is set, this script checks that the
# @@server_id of all servers are different. This is normally
# guaranteed by mtr, so it is only useful for debugging.
#
# $rpl_skip_reset_master_and_slave
# By default, this script issues RESET MASTER and RESET SLAVE
# before CHANGE MASTER and START SLAVE. RESET MASTER and RESET
# SLAVE are suppressed if $rpl_skip_reset_master_and_slave is
# set.
# Also see $rpl_server_skip_log_bin.
#
# $rpl_skip_change_master
# By default, this script issues CHANGE MASTER so that all slaves
# are ready to run as specified by $rpl_topology. CHANGE MASTER
# is suppressed if $rpl_skip_change_master is set.
#
# $rpl_skip_start_slave
# By default, this script issues START SLAVE on all slaves
# specified by $rpl_topology. START SLAVE is suppressed if
# $rpl_skip_change_master is set.
#
# $rpl_debug
# By default, this script only outputs a static text that says
# that rpl_init.inc was invoked. If $rpl_debug is set, additional
# debug info is printed. The debug info may be nondeterministic,
# so no test case should be checked in with $rpl_debug set.
#
# $slave_timeout
# Timeout used when waiting for the slave threads to start.
# See include/wait_for_slave_param.inc
#
# $rpl_server_skip_log_bin
# When $rpl_skip_reset_master_and_slave is not set
# RESET MASTER does not report ER_FLUSH_MASTER_BINLOG_CLOSED
# on any server.
#
# ==== Side effects ====
#
# Changes current connection to server_1.
--source include/have_log_bin.inc
--let $include_filename= rpl_init.inc [topology=$rpl_topology]
--source include/begin_include_file.inc
if ($rpl_debug)
{
--echo ---- Check input ----
--echo MASTER_MYPORT='$MASTER_MYPORT' SLAVE_MYPORT='$SLAVE_MYPORT' MASTER_MYPORT1='$MASTER_MYPORT1' SLAVE_MYPORT1='$SLAVE_MYPORT1'
}
# Allow $MASTER_MYPORT as alias for $SERVER_MYPORT_1
if (!$SERVER_MYPORT_1)
{
--let SERVER_MYPORT_1= $MASTER_MYPORT
}
# Allow $SLAVE_MYPORT as alias for $SERVER_MYPORT_2
if (!$SERVER_MYPORT_2)
{
--let SERVER_MYPORT_2= $SLAVE_MYPORT
}
# Check that $rpl_server_count is set
if (!$rpl_server_count)
{
--let $_compute_rpl_server_count= `SELECT REPLACE('$rpl_topology', '->', ',')`
--let $rpl_server_count= `SELECT GREATEST($_compute_rpl_server_count)`
}
if ($rpl_debug)
{
--echo ---- Setup connections and reset each server ----
}
if (!$rpl_debug)
{
--disable_query_log
}
# Create connection to the server; reset master/slave, select
# database, set autoinc variables.
--let $_rpl_server= $rpl_server_count
while ($_rpl_server)
{
# Connect.
--let $rpl_server_number= $_rpl_server
--let $rpl_connection_name= server_$_rpl_server
--source include/rpl_connect.inc
# Configure server.
--let $rpl_connection_name= server_$_rpl_server
--source include/rpl_connection.inc
USE test;
if (!$rpl_skip_reset_master_and_slave)
{
if (!$rpl_server_skip_log_bin)
{
--error 0
RESET MASTER;
}
if ($rpl_server_skip_log_bin)
{
--error 0,ER_FLUSH_MASTER_BINLOG_CLOSED
RESET MASTER;
}
SET GLOBAL gtid_slave_pos= "";
RESET SLAVE;
}
--dec $_rpl_server
}
# Signal that initialization is done and all connections created.
--let $rpl_inited= 1
# Assert that all hosts have different server_ids
if ($rpl_check_server_ids)
{
if ($rpl_debug)
{
--echo ---- Check that @@server_id is distinct for all servers ----
}
--let $_rpl_server= $rpl_server_count
while ($_rpl_server)
{
--let $_rpl_server2= $_rpl_server
--dec $_rpl_server2
while ($_rpl_server2)
{
--let $assert_text= Servers $_rpl_server and $_rpl_server2 should have different @@server_id
--let $assert_cond= [SELECT @@server_id AS i, i, 1] != $_rpl_server
--source include/assert.inc
--dec $_rpl_server2
}
--dec $_rpl_server
}
}
if ($rpl_debug)
{
--echo ---- Check the topology and call CHANGE MASTER ----
}
# $rpl_master_list must be set so that include/rpl_change_topology.inc and later
# include/rpl_for_each_slave.inc knows which servers are initialized and not.
--let $rpl_master_list= `SELECT REPEAT('x', $rpl_server_count * LENGTH($rpl_server_count))`
--source include/rpl_change_topology.inc
if (!$rpl_skip_start_slave)
{
if ($rpl_debug)
{
--echo ---- Start slaves ----
}
--source include/rpl_start_slaves.inc
}
if ($rpl_debug)
{
--echo ---- Set connection to the server_1 ----
}
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
--let $skip_restore_connection= 1
--let $include_filename= rpl_init.inc
--source include/end_include_file.inc
|
