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###############################################################################
#
# When changing mode to single primary with an appointed primary, P,
# if P leaves or fails under a majority, when the primary election began
# but is not yet over, the change will not abort and
# adapt to the new elected primary throwing a warning.
#
# Test:
# 0. This test needs three servers starting in multi primary mode
# 1. Create table for tests on a multi primary group
# 2. Lock table on a server that will be a secondary and set its
# weight to be chosen as primary on single primary mode
# 3. Insert a row on a group
# 4. Invoke a change to single primary selecting server3 as new primary
# 5. Check that the other members are waiting to enable
# super_read_only and executing primary election
# 6. Kill the primary selected when action was executed. Configure as
# single primary
# 7. Wait group detect exit of server3
# 8. Unblock table on member that is blocked
# 9. Check that the action finishes
# 10. Confirm server2 is the new primary due its weight on member
# election
# 11. Cleanup
#
###############################################################################
--source include/big_test.inc
--source include/have_group_replication_plugin.inc
--source include/not_valgrind.inc
--let $rpl_server_count= 3
--source include/group_replication.inc
--echo
--echo # 1. Create table for tests on a multi primary group
CREATE TABLE test.t1 (a INT PRIMARY KEY);
--source include/rpl_sync.inc
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--let $server3_uuid= query_get_value(SELECT @@SERVER_UUID, @@SERVER_UUID, 1)
--echo
--echo # 2. Lock table on a server that will be a secondary and set its
--echo # weight to be chosen as primary on single primary mode
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
SET @@GLOBAL.group_replication_member_weight= 90;
LOCK TABLE t1 READ;
--echo
--echo # 3. Insert a row on a group
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--let $server1_uuid= query_get_value(SELECT @@SERVER_UUID, @@SERVER_UUID, 1)
--eval INSERT INTO t1 VALUES (1)
--echo
--echo # 4. Invoke a change to single primary selecting server3 as new primary
--replace_result $server3_uuid MEMBER3_UUID
--send_eval SELECT group_replication_switch_to_single_primary_mode("$server3_uuid")
--echo
--echo # 5. Check that the other members are waiting to enable
--echo # super_read_only and executing primary election
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $wait_condition=SELECT COUNT(*)=1 FROM performance_schema.events_stages_current WHERE event_name LIKE "%stage/sql/Waiting for global read lock%"
--source include/wait_condition.inc
--let $stage_name= `SELECT event_name FROM performance_schema.events_stages_current WHERE event_name LIKE "%Single-primary Switch%";`
--let $assert_text= The stage should be "Single-primary Switch: executing Primary election"
--let $assert_cond= "$stage_name" = "stage/group_rpl/Single-primary Switch: executing Primary election"
--source include/assert.inc
--let $stage_name= `SELECT event_name FROM performance_schema.events_stages_current WHERE event_name LIKE "%global read lock%";`
--let $assert_text= The stage should be "stage/sql/Waiting for global read lock"
--let $assert_cond= "$stage_name" = "stage/sql/Waiting for global read lock"
--source include/assert.inc
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
--let $wait_condition=SELECT COUNT(*)=1 FROM performance_schema.events_stages_current WHERE event_name LIKE "%Waiting for members to enable super_read_only%"
--source include/wait_condition.inc
--let $stage_name= `SELECT event_name FROM performance_schema.events_stages_current WHERE event_name LIKE "%Single-primary Switch%";`
--let $assert_text= The stage should be "Single-primary Switch: executing Primary election"
--let $assert_cond= "$stage_name" = "stage/group_rpl/Single-primary Switch: executing Primary election"
--source include/assert.inc
--let $stage_name= `SELECT event_name FROM performance_schema.events_stages_current WHERE event_name LIKE "%super_read_only%";`
--let $assert_text= The stage should be "Primary Election: waiting for members to enable super_read_only"
--let $assert_cond= "$stage_name" = "stage/group_rpl/Primary Election: waiting for members to enable super_read_only"
--source include/assert.inc
--echo
--echo # 6. Kill the primary selected when action was executed. Configure as
--echo # single primary
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--let $_group_replication_local_address= `SELECT @@GLOBAL.group_replication_local_address`
--let $_group_replication_group_seeds= `SELECT @@GLOBAL.group_replication_group_seeds`
--let $_group_replication_comm_stack= `SELECT @@GLOBAL.group_replication_communication_stack`
--replace_result $group_replication_group_name GROUP_REPLICATION_GROUP_NAME $_group_replication_local_address GROUP_REPLICATION_LOCAL_ADDRESS $_group_replication_group_seeds GROUP_REPLICATION_GROUP_SEEDS $_group_replication_comm_stack GROUP_REPLICATION_COMMUNICATION_STACK
--let $restart_parameters=restart:--group-replication-start-on-boot=0 --group-replication-group-name=$group_replication_group_name --group_replication_local_address=$_group_replication_local_address --group_replication_group_seeds=$_group_replication_group_seeds --group_replication_single_primary_mode=TRUE --group_replication_enforce_update_everywhere_checks=FALSE --group_replication_communication_stack=$_group_replication_comm_stack
--source include/kill_and_restart_mysqld.inc
--let $rpl_server_number= 3
--source include/rpl_reconnect.inc
--echo
--echo # 7. Wait group detect exit of server3
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $server2_uuid= query_get_value(SELECT @@SERVER_UUID, @@SERVER_UUID, 1)
--let $group_replication_number_of_members= 2
--source include/gr_wait_for_number_of_members.inc
--echo
--echo # 8. Unblock table on member that is blocked
UNLOCK TABLES;
--echo
--echo # 9. Check that the action finishes
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--replace_result $server3_uuid MEMBER3_UUID
--reap
--echo
--echo # 10. Confirm server2 is the new primary due its weight on member
--echo # election
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--source include/gr_assert_primary_member.inc
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--source include/gr_assert_secondary_member.inc
--echo
--echo # 11. Cleanup
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--source include/start_group_replication.inc
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
SET @@GLOBAL.group_replication_member_weight= DEFAULT;
DROP TABLE t1;
--let $rpl_group_replication_single_primary_mode=1
--let $rpl_group_replication_reset_persistent_vars=1
--source include/group_replication_end.inc
|
