35b7ef35b7
Stopping the monitor before changing the master is the closest thing to an instant master switch.
90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
/**
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* MXS-359: Switch master mid-session
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*
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* https://jira.mariadb.org/browse/MXS-359
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*/
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#include "testconnections.h"
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TestConnections* global_test;
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void change_master(int next, int current)
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{
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TestConnections& test = *global_test;
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test.maxscales->ssh_node_f(0, true, "maxadmin shutdown monitor MySQL-Monitor");
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test.repl->connect();
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test.repl->change_master(current, next);
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test.repl->close_connections();
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test.maxscales->ssh_node_f(0, true, "maxadmin restart monitor MySQL-Monitor");
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}
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struct Test
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{
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const char* query;
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bool should_work;
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Test(const char* q = NULL, bool works = true):
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query(q),
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should_work(works)
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{
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}
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};
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void do_test(Test pre, Test post)
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{
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TestConnections& test = *global_test;
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int rc;
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test.maxscales->connect();
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if (pre.query)
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{
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rc = execute_query_silent(test.maxscales->conn_rwsplit[0], pre.query);
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test.assert((rc == 0) == pre.should_work, "Expected query '%s' to %s: %s",
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pre.query, pre.should_work ? "succeed" : "fail",
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mysql_error(test.maxscales->conn_rwsplit[0]));
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}
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change_master(1, 0);
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sleep(5);
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rc = execute_query_silent(test.maxscales->conn_rwsplit[0], post.query);
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test.assert((rc == 0) == post.should_work, "Expected query '%s' to %s: %s",
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post.query, post.should_work ? "succeed" : "fail",
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mysql_error(test.maxscales->conn_rwsplit[0]));
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change_master(0, 1);
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test.maxscales->disconnect();
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sleep(5);
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}
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int main(int argc, char** argv)
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{
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TestConnections test(argc, argv);
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global_test = &test;
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// Prepare a table for testing
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test.maxscales->connect();
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test.try_query(test.maxscales->conn_rwsplit[0], "CREATE OR REPLACE TABLE test.t1(id INT)");
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test.repl->sync_slaves();
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test.maxscales->disconnect();
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test.tprintf("Check that write after change works");
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do_test({}, {"INSERT INTO test.t1 VALUES (1)"});
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test.tprintf("Check that write with open transaction fails");
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do_test({"START TRANSACTION"}, {"INSERT INTO test.t1 VALUES (1)", false});
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test.tprintf("Check that read with open read-only transaction works");
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do_test({"START TRANSACTION READ ONLY"}, {"SELECT 1"});
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test.tprintf("Check that write with autocommit=0 fails");
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do_test({"SET autocommit=0"}, {"INSERT INTO test.t1 VALUES (1)", false});
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test.maxscales->connect();
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test.try_query(test.maxscales->conn_rwsplit[0], "DROP TABLE test.t1");
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test.repl->fix_replication();
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test.maxscales->disconnect();
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return test.global_result;
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}
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