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ce8a74f235
The main purpose of this allow one to use the --read-only option to ensure that no one can issue a query that can block replication. The --read-only option can now take 4 different values: 0 No read only (as before). 1 Blocks changes for users without the 'READ ONLY ADMIN' privilege (as before). 2 Blocks in addition LOCK TABLES and SELECT IN SHARE MODE for not 'READ ONLY ADMIN' users. 3 Blocks in addition 'READ_ONLY_ADMIN' users for all the previous statements. read_only is changed to an enum and one can use the following names for the lock levels: OFF, ON, NO_LOCK, NO_LOCK_NO_ADMIN Too keep things compatible with older versions config files, one can still use values FALSE and TRUE, which are mapped to OFF and ON. The main visible changes are: - 'show variables like "read_only"' now returns a string instead of a number. - Error messages related to read_only violations now contains the current value off readonly. Other things: - is_read_only_ctx() renamed to check_read_only_with_error() - Moved TL_READ_SKIP_LOCKED to it's logical place Reviewed by: Sergei Golubchik <serg@mariadb.org>
169 lines
3.6 KiB
Text
169 lines
3.6 KiB
Text
include/master-slave.inc
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[connection master]
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call mtr.add_suppression("Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT");
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connection master;
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create user test;
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grant all on test.* to test;
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connection slave;
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connect master2,127.0.0.1,test,,test,$MASTER_MYPORT,;
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connect slave2,127.0.0.1,test,,test,$SLAVE_MYPORT,;
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connection master1;
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create table t1(a int) engine=InnoDB;
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create table t2(a int) engine=MyISAM;
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insert into t1 values(1001);
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insert into t2 values(2001);
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connection master;
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set global read_only=1;
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connection master1;
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select @@read_only;
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@@read_only
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ON
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select * from t1;
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a
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1001
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select * from t2;
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a
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2001
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connection slave;
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select @@read_only;
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@@read_only
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OFF
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select * from t1;
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a
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1001
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select * from t2;
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a
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2001
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connection master;
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set global read_only=0;
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connection master1;
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BEGIN;
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connection master2;
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BEGIN;
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connection master;
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select @@read_only;
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@@read_only
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OFF
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set global read_only=1;
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connection master1;
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*** On SUPER USER connection ***
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insert into t1 values(1002);
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insert into t2 values(2002);
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connection master2;
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*** On regular USER connection ***
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insert into t1 values(1003);
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ERROR HY000: The MariaDB server is running with the --read-only=ON option so it cannot execute this statement
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insert into t2 values(2003);
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ERROR HY000: The MariaDB server is running with the --read-only=ON option so it cannot execute this statement
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connection master1;
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*** SUPER USER COMMIT (must succeed) ***
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COMMIT;
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connection master2;
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*** regular USER COMMIT (must succeed - nothing to commit) ***
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COMMIT;
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connection master;
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select @@read_only;
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@@read_only
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ON
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set global read_only=0;
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connection master1;
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insert into t1 values(1004);
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insert into t2 values(2004);
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select * from t1;
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a
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1001
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1002
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1004
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select * from t2;
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a
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2001
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2002
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2004
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connection slave;
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select * from t1;
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a
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1001
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1002
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1004
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select * from t2;
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a
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2001
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2002
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2004
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connection slave1;
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set global read_only=1;
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connection slave;
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select @@read_only;
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@@read_only
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ON
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) DEFAULT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
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show create table t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`a` int(11) DEFAULT NULL
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) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
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connection master;
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insert into t1 values(1005);
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insert into t2 values(2005);
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select * from t1;
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a
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1001
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1002
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1004
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1005
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select * from t2;
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a
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2001
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2002
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2004
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2005
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connection slave;
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connection slave;
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select * from t1;
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a
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1001
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1002
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1004
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1005
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select * from t2;
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a
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2001
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2002
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2004
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2005
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connection slave2;
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insert into t1 values(1006);
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ERROR HY000: The MariaDB server is running with the --read-only=ON option so it cannot execute this statement
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insert into t2 values(2006);
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ERROR HY000: The MariaDB server is running with the --read-only=ON option so it cannot execute this statement
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#
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# MDEV-30978: On slave XA COMMIT/XA ROLLBACK fail to return an error in read-only mode
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#
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# Where a read-only server permits writes through replication, it
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# should not permit user connections to commit/rollback XA transactions
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# prepared via replication. This test ensure this behavior is prohibited
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#
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connection master;
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xa start '1';
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insert into t1 values (1007);
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xa end '1';
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xa prepare '1';
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connection slave;
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connection slave2;
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xa commit '1';
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ERROR HY000: The MariaDB server is running with the --read-only=ON option so it cannot execute this statement
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xa rollback '1';
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ERROR HY000: The MariaDB server is running with the --read-only=ON option so it cannot execute this statement
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connection master;
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xa rollback '1';
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connection master;
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drop user test;
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drop table t1;
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drop table t2;
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connection slave;
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set global read_only=0;
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include/rpl_end.inc
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