Avoid using test.repl->N in MariaDBMonitor tests

The value may not match the nodes used by the test.

system-test/mariadbmonitor/mysqlmon_fail_switch_events.cpp

@@ -209,6 +209,7 @@ int main(int argc, char** argv)
     int server2_ind = 1;
     int server1_id = test.repl->get_server_id(server1_ind);
 
+    const int N = 4;
     const char* server_names[] = {"server1", "server2", "server3", "server4"};
     auto server1_name = server_names[server1_ind];
     auto server2_name = server_names[server2_ind];
@@ -307,10 +308,10 @@ int main(int argc, char** argv)
     if (test.ok())
     {
            // Check that all other nodes are slaves.
-        for (int i = 1; i < test.repl->N; i++)
+        for (int i = 1; i < N; i++)
         {
             string server_name = server_names[i];
-            auto states = test.maxscales->get_server_status(server_name.c_str());
+            states = test.maxscales->get_server_status(server_name.c_str());
             test.expect(states.count("Slave") == 1, "%s is not a slave.", server_name.c_str());
         }
     }

system-test/mariadbmonitor/mysqlmon_failover_rejoin_old_slave.cpp

@@ -105,8 +105,7 @@ void run(TestConnections& test)
 {
     test.maxscales->wait_for_monitor();
 
-    int N = test.repl->N;
-    cout << "Nodes: " << N << endl;
+    const int N = 4;
 
     expect(test, "server1", "Master", "Running");
     expect(test, "server2", "Slave", "Running");

system-test/mariadbmonitor/mysqlmon_failover_rolling_master.cpp

@@ -208,8 +208,7 @@ void run(XTestConnections& test)
 {
     test.maxscales->wait_for_monitor();
 
-    int N = test.repl->N;
-    cout << "Nodes: " << N << endl;
+    const int N = 4;
 
     cout << "\nConnecting to MaxScale." << endl;
     test.connect_maxscale();

system-test/mariadbmonitor/mysqlmon_failover_rolling_restart_slaves.cpp

@@ -158,8 +158,7 @@ void run(TestConnections& test)
 {
     test.maxscales->wait_for_monitor();
 
-    int N = test.repl->N;
-    cout << "Nodes: " << N << endl;
+    const int N = 4;
 
     check_server_status(test, N);
 

system-test/mariadbmonitor/mysqlmon_failover_stress.cpp

@@ -34,6 +34,9 @@ const time_t FAILOVER_DURATION = 5;
 // The test now runs only two failovers. Change for a longer time limit later.
 // TODO: add semisync to remove this limitation.
 
+// Number of backends
+const int N = 4;
+
 #define CMESSAGE(msg) \
     do { \
         stringstream ss; \
@@ -506,7 +509,7 @@ bool is_valid_server_id(TestConnections& test, int id)
     std::set<int> ids;
     test.repl->connect();
 
-    for (int i = 0; i < test.repl->N; i++)
+    for (int i = 0; i < N; i++)
     {
         ids.insert(test.repl->get_server_id(i));
     }

system-test/mariadbmonitor/mysqlmon_rejoin_bad.cpp

@@ -60,7 +60,7 @@ int main(int argc, char** argv)
     const char READ_ONLY_OFF[] = "SET GLOBAL read_only=0;";
 
     const int FIRST_MOD_NODE = 2;   // Modify nodes 2 & 3
-    const int NODE_COUNT = test.repl->N;
+    const int NODE_COUNT = 4;
     MYSQL** nodes = test.repl->nodes;
     for (int i = FIRST_MOD_NODE; i < NODE_COUNT; i++)
     {

system-test/mariadbmonitor/mysqlmon_rejoin_manual2.cpp

@@ -53,7 +53,7 @@ int main(int argc, char** argv)
     const char READ_ONLY_OFF[] = "SET GLOBAL read_only=0;";
     test.repl->connect();
     const int FIRST_MOD_NODE = 2;   // Modify nodes 2 & 3
-    const int NODE_COUNT = test.repl->N;
+    const int NODE_COUNT = 4;
     MYSQL** nodes = test.repl->nodes;
 
     for (int i = FIRST_MOD_NODE; i < NODE_COUNT; i++)

system-test/mariadbmonitor/mysqlmon_reset_replication.cpp

@@ -50,6 +50,7 @@ int main(int argc, char** argv)
     const char drop_query[] = "DROP TABLE test.t1;";
     const char strict_mode[] = "SET GLOBAL gtid_strict_mode=%i;";
 
+    const int N = 4;
     string server_names[] = {"server1", "server2", "server3", "server4"};
     string master = "Master";
     string slave = "Slave";
@@ -118,7 +119,7 @@ int main(int argc, char** argv)
         expect_server_status(server_names[3], slave);
         // Check that the values on the databases are identical by summing the values.
         int expected_sum = 55;      // 11 * 5
-        for (int i = 0; i < test.repl->N; i++)
+        for (int i = 0; i < N; i++)
         {
             int sum = read_sum(i);
             test.expect(sum == expected_sum,

system-test/mariadbmonitor/mysqlmon_switchover.cpp

@@ -123,8 +123,7 @@ void run(TestConnections& test)
 {
     test.maxscales->wait_for_monitor();
 
-    int N = test.repl->N;
-    cout << "Nodes: " << N << endl;
+    const int N = 4;
 
     expect(test, "server1", "Master", "Running");
     expect(test, "server2", "Slave", "Running");

system-test/mariadbmonitor/mysqlmon_switchover_auto.cpp

@@ -29,13 +29,14 @@ int main(int argc, char** argv)
 
     test.repl->connect();
     delete_slave_binlogs(test);
+    const int N = 4;
 
     // Enable the disks-plugin on all servers. Has to be done before MaxScale is on to prevent disk space
     // monitoring from disabling itself.
     bool disks_plugin_loaded = false;
     const char strict_mode[] = "SET GLOBAL gtid_strict_mode=%i;";
     test.repl->connect();
-    for (int i = 0; i < test.repl->N; i++)
+    for (int i = 0; i < N; i++)
     {
         MYSQL* conn = test.repl->nodes[i];
         test.try_query(conn, "INSTALL SONAME 'disks';");
@@ -149,8 +150,8 @@ int main(int argc, char** argv)
 
     if (disks_plugin_loaded)
     {
-        // Enable the disks-plugin on all servers.
-        for (int i = 0; i < test.repl->N; i++)
+        // Disable the disks-plugin on all servers.
+        for (int i = 0; i < N; i++)
         {
             MYSQL* conn = test.repl->nodes[i];
             test.try_query(conn, "UNINSTALL SONAME 'disks';");

system-test/mariadbmonitor/mysqlmon_switchover_bad_master.cpp

@@ -123,8 +123,7 @@ void run(TestConnections& test)
 {
     test.maxscales->wait_for_monitor();
 
-    int N = test.repl->N;
-    cout << "Nodes: " << N << endl;
+    const int N = 4;
 
     expect(test, "server1", "Master", "Running");
     expect(test, "server2", "Slave", "Running");