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make @@wsrep_provider and @@wsrep_notify_cmd read-only

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this should simplify run-time cluster management
This commit is contained in:
Sergei Golubchik
2021-02-18 14:20:48 +01:00
parent cbbbdb9c3b
commit ce3a2a688d
17 changed files with 24 additions and 313 deletions
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12
mysql-test/suite/wsrep/r/variables.result
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@ -14,7 +14,6 @@ SET SESSION wsrep_replicate_myisam= ON;
ERROR HY000: Variable 'wsrep_replicate_myisam' is a GLOBAL variable and should be set with SET GLOBAL
SET GLOBAL wsrep_replicate_myisam= ON;
SET GLOBAL wsrep_replicate_myisam= OFF;
SET GLOBAL wsrep_provider=none;
#
# MDEV#5790: SHOW GLOBAL STATUS LIKE does not show the correct list of
# variables when using "_"
@ -26,7 +25,6 @@ wsrep_local_state_comment #
# Should show nothing.
SHOW STATUS LIKE 'x';
Variable_name Value
SET GLOBAL wsrep_provider=none;
SHOW STATUS LIKE 'wsrep_local_state_uuid';
Variable_name Value
@ -35,7 +33,6 @@ wsrep_local_state_uuid #
SHOW STATUS LIKE 'wsrep_last_committed';
Variable_name Value
wsrep_last_committed #
SET GLOBAL wsrep_provider=none;
#
# MDEV#6206: wsrep_slave_threads subtracts from max_connections
@ -49,7 +46,7 @@ SELECT @@global.wsrep_slave_threads;
1
SELECT @@global.wsrep_cluster_address;
@@global.wsrep_cluster_address
gcomm://
SELECT @@global.wsrep_on;
@@global.wsrep_on
1
@ -58,14 +55,14 @@ Variable_name Value
Threads_connected 1
SHOW STATUS LIKE 'wsrep_thread_count';
Variable_name Value
wsrep_thread_count 0
wsrep_thread_count 2
SELECT @@global.wsrep_provider;
@@global.wsrep_provider
libgalera_smm.so
SELECT @@global.wsrep_cluster_address;
@@global.wsrep_cluster_address
gcomm://
SELECT @@global.wsrep_on;
@@global.wsrep_on
1
@ -74,11 +71,10 @@ Variable_name Value
Threads_connected 1
SHOW STATUS LIKE 'wsrep_thread_count';
Variable_name Value
wsrep_thread_count 0
wsrep_thread_count 2
# Setting wsrep_cluster_address triggers the creation of
# applier/rollbacker threads.
SET GLOBAL wsrep_cluster_address= 'gcomm://';
# Wait for applier thread to get created 1.
# Wait for applier thread to get created 2.
SELECT VARIABLE_VALUE AS EXPECT_1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';