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MaxScale/maxscale-system-test/mysqlmon_multimaster.cpp
Esa Korhonen 4bd8630107 MXS-1598 Add replication lag test cases to mysqlmon_multimaster 
The delay is added simply with the 'MASTER_DELAY'-option of
the 'CHANGE MASTER TO'-command.
2018-11-15 13:26:38 +02:00

366 lines
13 KiB
C++
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/**
* @file mysqlmon_multimaster.cpp MySQL Monitor Multi-master Test
* - Configure all servers into a multi-master ring with one slave
* - check status using Maxadmin 'show servers' and 'show monitor "MySQL Monitor"'
* - Set nodes 0 and 1 into read-only mode
* - repeat status check
* - Configure nodes 1 and 2 (server2 and server3) into a master-master pair, make node 0 a slave of node 1
* and node 3 a slave of node 2
* - repeat status check
* - Set node 1 into read-only mode
* - repeat status check
* - Create two distinct groups (server1 and server2 are masters for eache others and same for server3 and
* server4)
* - repeat status check
* - Set nodes 1 and 3 (server2 and server4) into read-only mode
*
* Addition: add delays to some slave connections and check that the monitor correctly detects the delay
*/
#include <iostream>
#include "testconnections.h"
#include "maxadmin_operations.h"
#include "sql_t1.h"
#include <jansson.h>
#include <string>
using std::cout;
using std::string;
void check_status(TestConnections& test, const char* server, const char* status)
{
char cmd[256];
char maxadmin_result[1024];
sprintf(cmd, "show server %s", server);
test.maxscales->get_maxadmin_param(0, cmd, (char*)"Status:", maxadmin_result);
if (maxadmin_result == NULL)
{
test.add_result(1, "maxadmin execution error\n");
return;
}
if (strstr(maxadmin_result, status) == NULL)
{
test.add_result(1, "Test failed, server '%s' status is '%s', expected '%s'\n",
server, maxadmin_result, status);
}
}
json_t* get_json_data(TestConnections& test, const char* query)
{
json_t* rval = NULL;
int exit_code = 1;
char* output = test.maxscales->ssh_node_output(0, query, true, &exit_code);
if (output == NULL)
{
test.add_result(1, "Query '%s' execution error, no output.\ni", output);
}
else
{
json_error_t error;
rval = json_loads(output, 0, &error);
free(output);
if (rval == NULL)
{
test.add_result(1, "JSON decode error: %s\n", error.text);
}
}
return rval;
}
json_t* traverse_json(TestConnections& test, json_t* object, const std::vector<string>& keys)
{
test.expect(object, "JSON object is NULL\n");
json_t* current_object = object;
for (auto iter = keys.begin(); iter != keys.end() && current_object; ++iter)
{
current_object = json_object_get(current_object, (*iter).c_str());
test.expect(current_object, "Key %s was not found in json data.\n", (*iter).c_str());
}
return current_object;
}
json_t* find_array_elem_json(TestConnections& test, json_t* object,
std::string key, std::string expected_val)
{
bool is_array = json_is_array(object);
test.expect(is_array, "JSON object is not an array\n");
json_t* found_elem = NULL;
if (is_array)
{
size_t arr_size = json_array_size(object);
for (size_t i = 0; i < arr_size; i++)
{
json_t* arr_elem = json_array_get(object, i);
json_t* elem_val = json_object_get(arr_elem, key.c_str());
bool is_string = json_is_string(elem_val);
test.expect(is_string, "Key %s was not found in json data or the data is not string.\n", key.c_str());
if (is_string)
{
std::string elem_field = json_string_value(elem_val);
if (elem_field == expected_val)
{
found_elem = arr_elem;
break;
}
}
}
test.expect(found_elem, "Array element with %s->%s was not found in json array\n",
key.c_str(), expected_val.c_str());
}
return found_elem;
}
void check_group(TestConnections& test, const char* server, int expected_group)
{
json_t* monitor_data = get_json_data(test, "maxctrl api get monitors/MySQL-Monitor");
if (monitor_data == NULL)
{
return;
}
monitor_data = traverse_json(test, monitor_data,
{"data", "attributes", "monitor_diagnostics", "server_info"});
if (monitor_data)
{
auto server_data = find_array_elem_json(test, monitor_data, "name", server);
if (server_data)
{
int found_group = json_integer_value(json_object_get(server_data, "master_group"));
test.expect(found_group == expected_group, "Server '%s', expected group '%d', not '%d'",
server, expected_group, found_group);
}
}
}
void check_rlag(TestConnections& test, const char* server, int min_rlag, int max_rlag)
{
json_t* object_data = get_json_data(test, "maxctrl api get servers");
if (object_data)
{
auto servers_data = traverse_json(test, object_data, {"data"});
auto server_data = find_array_elem_json(test, servers_data, "id", server);
auto rlag_object = traverse_json(test, server_data, {"attributes", "replication_lag"});
if (rlag_object)
{
int found_rlag = json_integer_value(rlag_object);
if (found_rlag >= min_rlag && found_rlag <= max_rlag)
{
cout << "Replication lag of " << server << " is " << found_rlag << " seconds.\n";
}
else
{
test.expect(false,
"Replication lag of %s is out of bounds: value: %i min: %i max: %i\n",
server, found_rlag, min_rlag, max_rlag);
}
}
}
}
void change_master(TestConnections& test ,int slave, int master, const string& conn_name = "",
int replication_delay = 0)
{
const char query[] = "CHANGE MASTER '%s' TO master_host='%s', master_port=%d, "
"master_log_file='mar-bin.000001', master_log_pos=4, "
"master_user='repl', master_password='repl', master_delay=%d; "
"START SLAVE '%s';";
test.try_query(test.repl->nodes[slave], query, conn_name.c_str(),
test.repl->IP[master], test.repl->port[master],
replication_delay, conn_name.c_str());
}
int main(int argc, char* argv[])
{
const char mm_master_states[] = "Master, Running";
const char mm_slave_states[] = "Relay Master, Slave, Running";
const char slave_states[] = "Slave, Running";
const char running_state[] = "Running";
const char reset_query[] = "STOP SLAVE; RESET SLAVE ALL; RESET MASTER; SET GLOBAL read_only='OFF'";
const char readonly_on_query[] = "SET GLOBAL read_only='ON'";
TestConnections::require_repl_version("10.2.3"); // Delayed replication needs this.
TestConnections test(argc, argv);
test.tprintf("Test 1 - Configure all servers into a multi-master ring with one slave");
int max_rlag = 100;
test.set_timeout(120);
test.repl->execute_query_all_nodes(reset_query);
test.repl->connect();
change_master(test, 0, 1);
change_master(test, 1, 2);
change_master(test, 2, 0);
change_master(test, 3, 2, "", max_rlag);
test.maxscales->wait_for_monitor(2);
auto maxconn = test.maxscales->open_rwsplit_connection();
test.try_query(maxconn, "FLUSH TABLES;");
mysql_close(maxconn);
test.maxscales->wait_for_monitor(1);
check_status(test, "server1", mm_master_states);
check_status(test, "server2", mm_slave_states);
check_status(test, "server3", mm_slave_states);
check_status(test, "server4", slave_states);
check_group(test, "server1", 1);
check_group(test, "server2", 1);
check_group(test, "server3", 1);
check_group(test, "server4", 0);
check_rlag(test, "server4", 1, max_rlag);
test.tprintf("Test 2 - Set nodes 0 and 1 into read-only mode");
test.set_timeout(120);
execute_query(test.repl->nodes[0], readonly_on_query);
execute_query(test.repl->nodes[1], readonly_on_query);
test.maxscales->wait_for_monitor(1);
check_status(test, "server1", mm_slave_states);
check_status(test, "server2", mm_slave_states);
check_status(test, "server3", mm_master_states);
check_status(test, "server4", slave_states);
check_group(test, "server1", 1);
check_group(test, "server2", 1);
check_group(test, "server3", 1);
check_group(test, "server4", 0);
check_rlag(test, "server4", 1, max_rlag);
test.tprintf("Test 3 - Configure nodes 1 and 2 into a master-master pair, make node 0 "
"a slave of node 1 and node 3 a slave of node 2");
test.set_timeout(120);
test.repl->execute_query_all_nodes(reset_query);
test.repl->connect();
change_master(test, 0, 1);
change_master(test, 1, 2);
change_master(test, 2, 1, "", max_rlag);
change_master(test, 3, 2);
test.maxscales->wait_for_monitor(1);
maxconn = test.maxscales->open_rwsplit_connection();
test.try_query(maxconn, "FLUSH TABLES;");
mysql_close(maxconn);
test.maxscales->wait_for_monitor(1);
check_status(test, "server1", slave_states);
check_status(test, "server2", mm_master_states);
check_status(test, "server3", mm_slave_states);
check_status(test, "server4", slave_states);
check_group(test, "server1", 0);
check_group(test, "server2", 1);
check_group(test, "server3", 1);
check_group(test, "server4", 0);
check_rlag(test, "server3", 1, max_rlag);
test.tprintf("Test 4 - Set node 1 into read-only mode");
test.set_timeout(120);
execute_query(test.repl->nodes[1], readonly_on_query);
test.maxscales->wait_for_monitor(1);
check_status(test, "server1", slave_states);
check_status(test, "server2", mm_slave_states);
check_status(test, "server3", mm_master_states);
check_status(test, "server4", slave_states);
check_group(test, "server1", 0);
check_group(test, "server2", 1);
check_group(test, "server3", 1);
check_group(test, "server4", 0);
test.tprintf("Test 5 - Create two distinct groups");
test.set_timeout(120);
test.repl->execute_query_all_nodes(reset_query);
test.repl->connect();
change_master(test, 0, 1);
change_master(test, 1, 0);
change_master(test, 2, 3);
change_master(test, 3, 2);
test.maxscales->wait_for_monitor(1);
// Even though the servers are in two distinct groups, only one of them
// contains a master and a slave. Only one master may exist in a cluster
// at once, since by definition this is the server to which routers may
// direct writes.
check_status(test, "server1", mm_master_states);
check_status(test, "server2", mm_slave_states);
check_status(test, "server3", running_state);
check_status(test, "server4", running_state);
check_group(test, "server1", 1);
check_group(test, "server2", 1);
check_group(test, "server3", 2);
check_group(test, "server4", 2);
test.tprintf("Test 6 - Set nodes 1 and 3 into read-only mode");
test.set_timeout(120);
execute_query(test.repl->nodes[1], readonly_on_query);
execute_query(test.repl->nodes[3], readonly_on_query);
test.maxscales->wait_for_monitor(1);
check_status(test, "server1", mm_master_states);
check_status(test, "server2", mm_slave_states);
check_status(test, "server3", running_state);
check_status(test, "server4", running_state);
check_group(test, "server1", 1);
check_group(test, "server2", 1);
check_group(test, "server3", 2);
check_group(test, "server4", 2);
test.tprintf("Test 7 - Diamond topology with delay");
test.repl->execute_query_all_nodes(reset_query);
test.repl->connect();
change_master(test, 0, 1, "a", max_rlag);
change_master(test, 0, 2, "b", max_rlag);
change_master(test, 1, 3);
change_master(test, 2, 3);
test.maxscales->wait_for_monitor(1);
maxconn = test.maxscales->open_rwsplit_connection();
test.try_query(maxconn, "FLUSH TABLES;");
mysql_close(maxconn);
test.maxscales->wait_for_monitor(1);
check_status(test, "server1", slave_states);
check_status(test, "server2", mm_slave_states);
check_status(test, "server3", mm_slave_states);
check_status(test, "server4", mm_master_states);
check_group(test, "server1", 0);
check_group(test, "server2", 0);
check_group(test, "server3", 0);
check_group(test, "server4", 0);
check_rlag(test, "server1", 1, max_rlag);
test.tprintf("Test 8 - Diamond topology with no delay");
const char remove_delay[] = "STOP SLAVE '%s'; CHANGE MASTER '%s' TO master_delay=0; START SLAVE '%s';";
test.try_query(test.repl->nodes[0], remove_delay, "a", "a", "a");
test.maxscales->wait_for_monitor(1);
check_status(test, "server1", slave_states);
check_rlag(test, "server1", 0, 0);
// Test over, reset topology.
const char reset_with_name[] = "STOP SLAVE '%s'; RESET SLAVE '%s' ALL;";
test.try_query(test.repl->nodes[0], reset_with_name, "a", "a");
test.try_query(test.repl->nodes[0], reset_with_name, "b", "b");
test.repl->execute_query_all_nodes(reset_query);
test.repl->connect();
change_master(test, 1, 0);
change_master(test, 2, 0);
change_master(test, 3, 0);
return test.global_result;
}
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