Merge branch '2.3' into 2.4

system-test/mariadbmonitor/mysqlmon_rejoin_bad2.cpp

@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
+ *
+ * Change Date: 2024-07-07
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+#include <vector>
+#include <iostream>
+#include <iterator>
+
+#include <maxtest/testconnections.hh>
+#include "fail_switch_rejoin_common.cpp"
+
+using std::string;
+using std::cout;
+using std::endl;
+
+static void expect(TestConnections& test, const char* zServer, const StringSet& expected)
+{
+    StringSet found = test.get_server_status(zServer);
+
+    std::ostream_iterator<string> oi(cout, ", ");
+
+    cout << zServer << ", expected states: ";
+    std::copy(expected.begin(), expected.end(), oi);
+    cout << endl;
+
+    cout << zServer << ", found states   : ";
+    std::copy(found.begin(), found.end(), oi);
+    cout << endl;
+
+    if (found != expected)
+    {
+        cout << "ERROR, found states are not the same as the expected ones." << endl;
+        ++test.global_result;
+    }
+
+    cout << endl;
+}
+
+static void expect(TestConnections& test, const char* zServer, const char* zState)
+{
+    StringSet s;
+    s.insert(zState);
+    expect(test, zServer, s);
+}
+
+static void expect(TestConnections& test, const char* zServer, const char* zState1, const char* zState2)
+{
+    StringSet s;
+    s.insert(zState1);
+    s.insert(zState2);
+    expect(test, zServer, s);
+}
+
+int main(int argc, char** argv)
+{
+    interactive = strcmp(argv[argc - 1], "interactive") == 0;
+    Mariadb_nodes::require_gtid(true);
+    TestConnections test(argc, argv);
+    test.repl->connect();
+
+    // Delete binlogs to sync gtid:s
+    delete_slave_binlogs(test);
+    // Set up test table
+    basic_test(test);
+
+    MYSQL* maxconn = test.maxscales->open_rwsplit_connection(0);
+    // Advance gtid:s a bit to so gtid variables are updated.
+    generate_traffic_and_check(test, maxconn, 5);
+    test.repl->sync_slaves(0);
+    get_output(test);
+
+    print_gtids(test);
+    get_input();
+    mysql_close(maxconn);
+
+    // Stop master, wait for failover
+    cout << "Stopping master, should auto-failover." << endl;
+    int master_id_old = get_master_server_id(test);
+    test.repl->stop_node(0);
+    test.maxscales->wait_for_monitor(2);
+    get_output(test);
+    int master_id_new = get_master_server_id(test);
+    cout << "Master server id is " << master_id_new << endl;
+    test.expect(master_id_new > 0 && master_id_new != master_id_old,
+                "Failover did not promote a new master.");
+    if (test.global_result != 0)
+    {
+        return test.global_result;
+    }
+
+    cout << "Stopping MaxScale for a moment.\n";
+    // Stop maxscale to prevent an unintended rejoin.
+    if (test.stop_maxscale(0))
+    {
+        test.expect(false, "Could not stop MaxScale.");
+        return test.global_result;
+    }
+
+    // Restart old master. Then add some events to it.
+    test.repl->start_node(0, (char*)"");
+    test.repl->connect();
+    cout << "Adding more events to node 0.\n";
+    generate_traffic_and_check(test, test.repl->nodes[0], 5);
+    print_gtids(test);
+
+    cout << "Starting MaxScale, node 0 should not be able to join because it has extra events.\n";
+    // Restart maxscale. Should not rejoin old master.
+    if (test.start_maxscale(0))
+    {
+        test.expect(false, "Could not start MaxScale.");
+        return test.global_result;
+    }
+    test.maxscales->wait_for_monitor(2);
+    get_output(test);
+
+    expect(test, "server1", "Running");
+    if (test.global_result != 0)
+    {
+        cout << "Old master is a member of the cluster when it should not be. \n";
+        return test.global_result;
+    }
+
+    // Set current master to replicate from the old master. The new master should lose its Master status
+    // and auto_rejoin will redirect servers 3 and 4 so that all replicate from server 1.
+    cout << "Setting server " << master_id_new << " to replicate from server 1. Server " << master_id_new
+         << " should lose its master status and other servers should be redirected to server 1.\n";
+    const char CHANGE_CMD_FMT[] = "CHANGE MASTER TO MASTER_HOST = '%s', MASTER_PORT = %d, "
+                                  "MASTER_USE_GTID = current_pos, "
+                                  "MASTER_USER='repl', MASTER_PASSWORD = 'repl';";
+    char cmd[256];
+    int ind = master_id_new - 1;
+    snprintf(cmd, sizeof(cmd), CHANGE_CMD_FMT, test.repl->IP_private[0], test.repl->port[0]);
+    MYSQL** nodes = test.repl->nodes;
+    mysql_query(nodes[ind], cmd);
+    mysql_query(nodes[ind], "START SLAVE;");
+    test.maxscales->wait_for_monitor(2);
+    get_output(test);
+
+    expect(test, "server1", "Master", "Running");
+    expect(test, "server2", "Slave", "Running");
+    expect(test, "server3", "Slave", "Running");
+    expect(test, "server4", "Slave", "Running");
+    test.repl->fix_replication();
+    return test.global_result;
+}