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# ==== Purpose ====
#
# Configure N servers to be in single primary mode.
#
# It does not change the current connection.
#
# ==== Usage ====
#
# --let $rpl_server_count= N
# [--let $reset_single_primary_mode=1|0]
# --source include/single_primary_mode.inc
#
# Parameters:
# $rpl_server_count
# See include/master-slave.inc
#
# $reset_single_primary_mode
# To check whether we are going to set or
# reset the single primary mode configuration
#
--let $include_filename= single_primary_mode.inc
--source include/begin_include_file.inc
if (!$reset_single_primary_mode)
{
--let $reset_single_primary_mode= 0
}
--let $_i_set_single_primary_mode= 1
--let $_saved_connection= $CURRENT_CONNECTION
--disable_query_log
while ($_i_set_single_primary_mode <= $rpl_server_count)
{
--let $rpl_connection_name= server_aux_$_i_set_single_primary_mode
--let $rpl_server_number= $_i_set_single_primary_mode
--source include/rpl_connect.inc
--let $rpl_connection_name= server_aux_$_i_set_single_primary_mode
--source include/rpl_connection.inc
# plugin cannot be running for us to setup these configs
let $_this_member_id=
query_get_value(SELECT @@SERVER_UUID, @@SERVER_UUID, 1);
let $_is_plugin_running=
`SELECT member_state IN ("ONLINE", "UNREACHABLE", "RECOVERY", "ERROR")
FROM performance_schema.replication_group_members
WHERE member_id="$_this_member_id"`;
if ($_is_plugin_running)
{
--die "Cannot set/reset single primary mode while the plugin is running!"
}
if (!$reset_single_primary_mode)
{
SET GLOBAL group_replication_enforce_update_everywhere_checks= FALSE;
SET GLOBAL group_replication_single_primary_mode= TRUE;
}
if ($reset_single_primary_mode)
{
SET GLOBAL group_replication_single_primary_mode= FALSE;
SET GLOBAL group_replication_enforce_update_everywhere_checks= TRUE;
}
--connection default
--disconnect server_aux_$_i_set_single_primary_mode
--inc $_i_set_single_primary_mode
}
--enable_query_log
--let $reset_single_primary_mode=
--connection $_saved_connection
--let $include_filename= single_primary_mode.inc
--source include/end_include_file.inc
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