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