MXS-1383: fix for some change master to MASTER_LOG_FILE, POS settings that fail.
MXS-1383: fix for some change master to MASTER_LOG_FILE, POS settings that fail.
This commit is contained in:
MassimilianoPinto
@ -365,6 +365,17 @@ static void blr_abort_change_master(ROUTER_INSTANCE *router,
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const char *error);
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const char *error);
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static void blr_slave_abort_dump_request(ROUTER_SLAVE *slave,
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static void blr_slave_abort_dump_request(ROUTER_SLAVE *slave,
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const char *errmsg);
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const char *errmsg);
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static bool blr_binlog_change_check(const ROUTER_INSTANCE *router,
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const CHANGE_MASTER_OPTIONS change_master,
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char *error);
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static bool blr_change_binlog_name(ROUTER_INSTANCE *router,
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char *log_file,
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char **new_logfile,
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char *error);
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static bool blr_apply_changes(ROUTER_INSTANCE *router,
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CHANGE_MASTER_OPTIONS change_master,
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char *new_logfile,
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char *error);
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/**
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/**
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* Process a request packet from the slave server.
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* Process a request packet from the slave server.
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*
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*
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@ -4052,291 +4063,33 @@ int blr_handle_change_master(ROUTER_INSTANCE* router,
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}
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}
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/**
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/**
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* Check if binlog file can be changed
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*
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* Change the binlog filename as from MASTER_LOG_FILE
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* Change the binlog filename as from MASTER_LOG_FILE
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* New binlog file could be the next one or current one
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* New binlog file could be the next one or current one
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* or empty if router->mariadb10_master_gtid is set.
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*/
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*/
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master_logfile = blr_set_master_logfile(router,
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if (!blr_binlog_change_check(router,
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change_master.binlog_file,
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change_master,
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error);
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error) ||
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!blr_change_binlog_name(router,
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/**
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change_master.binlog_file,
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* If MASTER_LOG_FILE is not set
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&master_logfile,
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* and master connection is configured
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error) ||
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* set master_logfile to current binlog_name.
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!blr_apply_changes(router,
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*
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change_master,
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* 'router->use_mariadb10_gtid' value is checked before
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master_logfile,
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* returning an error
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error))
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*/
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if (master_logfile == NULL)
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{
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{
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bool change_binlog_error = true;
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blr_abort_change_master(router,
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const char *err_prefix = "Router is not configured "
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current_master,
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"for master connection,";
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&change_master,
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/* Replication is not configured yet */
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error);
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if (router->master_state == BLRM_UNCONFIGURED)
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MXS_FREE(master_logfile);
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{
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/* Check MASTER_USE_GTID option */
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if (router->mariadb10_master_gtid &&
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!change_master.use_mariadb10_gtid)
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{
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snprintf(error,
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BINLOG_ERROR_MSG_LEN,
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"%s MASTER_USE_GTID=Slave_pos is required",
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err_prefix);
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}
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else
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{
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/* If there is another error message keep it */
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if (!strlen(error) &&
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!change_master.use_mariadb10_gtid)
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{
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snprintf(error,
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BINLOG_ERROR_MSG_LEN,
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"%s MASTER_LOG_FILE is required",
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err_prefix);
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}
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}
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change_binlog_error = strlen(error) ? true : false;
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spinlock_release(&router->lock);
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}
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else
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{
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/* If errors returned set error */
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if (strlen(error) &&
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(router->mariadb10_master_gtid &&
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!change_master.use_mariadb10_gtid))
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{
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/* MASTER_USE_GTID option not set */
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snprintf(error,
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BINLOG_ERROR_MSG_LEN,
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"%s MASTER_USE_GTID=Slave_pos is required",
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err_prefix);
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}
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else
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{
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/* Use current binlog file */
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master_logfile = MXS_STRDUP_A(router->binlog_name);
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change_binlog_error = false;
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return -1;
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}
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}
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if (change_binlog_error)
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{
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blr_abort_change_master(router,
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current_master,
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&change_master,
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error);
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spinlock_release(&router->lock);
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return -1;
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}
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}
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else
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/* master_log_file is not NULL */
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{
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/* Check for MASTER_USE_GTID option */
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const char *err_prefix = "Router is not configured "
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"for master connection,";
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if (router->mariadb10_master_gtid &&
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!change_master.use_mariadb10_gtid)
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{
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snprintf(error,
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BINLOG_ERROR_MSG_LEN,
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"%s MASTER_USE_GTID=Slave_pos is required",
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err_prefix);
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blr_abort_change_master(router,
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current_master,
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&change_master,
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error);
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spinlock_release(&router->lock);
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return -1;
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}
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}
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/**
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* If master connection is configured check new binlog name:
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* If binlog name has changed to next one
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* then only position 4 is allowed
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*/
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/**
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* Check whether MASTER_USE_GTID option was set
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*/
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if ((router->mariadb10_master_gtid &&
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!change_master.use_mariadb10_gtid) &&
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strcmp(master_logfile, router->binlog_name) != 0 &&
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router->master_state != BLRM_UNCONFIGURED)
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{
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int return_error = 0;
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if (master_log_pos == NULL)
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{
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snprintf(error,
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BINLOG_ERROR_MSG_LEN,
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"Please provide an explicit MASTER_LOG_POS "
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"for new MASTER_LOG_FILE %s: "
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"Permitted binlog pos is %d. "
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"Current master_log_file=%s, master_log_pos=%lu",
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master_logfile,
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4,
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router->binlog_name,
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router->current_pos);
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return_error = 1;
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}
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else
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{
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if (pos != 4)
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{
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snprintf(error,
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BINLOG_ERROR_MSG_LEN,
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"Can not set MASTER_LOG_POS to %s for "
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"MASTER_LOG_FILE %s: "
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"Permitted binlog pos is %d. "
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"Current master_log_file=%s, master_log_pos=%lu",
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master_log_pos,
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master_logfile,
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4,
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router->binlog_name,
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router->current_pos);
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return_error = 1;
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}
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}
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/* Return an error or set new binlog name at pos 4 */
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if (return_error)
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{
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blr_abort_change_master(router,
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current_master,
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&change_master,
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error);
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MXS_FREE(master_logfile);
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spinlock_release(&router->lock);
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return -1;
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}
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else
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{
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/* Set new filename at pos 4 */
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strcpy(router->binlog_name, master_logfile);
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router->current_pos = 4;
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router->binlog_position = 4;
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router->current_safe_event = 4;
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/**
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* Close current file binlog file,
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* next start slave will create the new one
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*/
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fsync(router->binlog_fd);
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close(router->binlog_fd);
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router->binlog_fd = -1;
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MXS_INFO("%s: New MASTER_LOG_FILE is [%s]",
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router->service->name,
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router->binlog_name);
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}
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}
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/* MariaDB 10 GTID request */
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else if (router->mariadb10_master_gtid &&
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change_master.use_mariadb10_gtid)
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{
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/* Set empty filename at pos 4 */
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strcpy(router->binlog_name, "");
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router->current_pos = 4;
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router->binlog_position = 4;
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router->current_safe_event = 4;
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MXS_INFO("%s: MASTER_USE_GTID is [%s], value [%s]",
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router->service->name,
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change_master.use_mariadb10_gtid,
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router->last_mariadb_gtid);
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}
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else
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{
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/**
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* Same binlog or master connection not configured
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* Position cannot be different from
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* current pos or 4 (if BLRM_UNCONFIGURED)
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*/
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int return_error = 0;
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if (router->master_state == BLRM_UNCONFIGURED)
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{
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if (master_log_pos != NULL && pos != 4)
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{
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snprintf(error,
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BINLOG_ERROR_MSG_LEN,
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"Can not set MASTER_LOG_POS to %s: "
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"Permitted binlog pos is 4. Specified master_log_file=%s",
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master_log_pos,
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master_logfile);
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return_error = 1;
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}
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}
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else
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{
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if (master_log_pos != NULL && pos != router->current_pos)
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{
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snprintf(error,
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BINLOG_ERROR_MSG_LEN, "Can not set MASTER_LOG_POS to %s: "
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"Permitted binlog pos is %lu. "
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"Current master_log_file=%s, master_log_pos=%lu",
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master_log_pos,
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router->current_pos,
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router->binlog_name,
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router->current_pos);
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return_error = 1;
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}
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}
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/* log error and return */
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if (return_error)
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{
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blr_abort_change_master(router,
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current_master,
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&change_master,
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error);
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MXS_FREE(master_logfile);
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spinlock_release(&router->lock);
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return -1;
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}
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else
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{
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/**
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* no pos change, set it to 4 if BLRM_UNCONFIGURED
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* Also set binlog name if UNCONFIGURED
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*/
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if (router->master_state == BLRM_UNCONFIGURED)
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{
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router->current_pos = 4;
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router->binlog_position = 4;
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router->current_safe_event = 4;
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strcpy(router->binlog_name, master_logfile);
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MXS_INFO("%s: New MASTER_LOG_FILE is [%s]",
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router->service->name,
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router->binlog_name);
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}
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MXS_INFO("%s: New MASTER_LOG_POS is [%lu]",
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router->service->name,
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router->current_pos);
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}
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}
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}
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/* Log config changes (without passwords) */
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/* Log config changes (without passwords) */
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@ -4444,7 +4197,9 @@ blr_set_master_port(ROUTER_INSTANCE *router, char *port)
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* @return New binlog file or NULL on error
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* @return New binlog file or NULL on error
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*/
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*/
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static char *
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static char *
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blr_set_master_logfile(ROUTER_INSTANCE *router, char *filename, char *error)
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blr_set_master_logfile(ROUTER_INSTANCE *router,
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char *filename,
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char *error)
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{
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{
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char *new_binlog_file = NULL;
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char *new_binlog_file = NULL;
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@ -9172,3 +8927,301 @@ static void blr_slave_abort_dump_request(ROUTER_SLAVE *slave,
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"HY000",
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"HY000",
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BINLOG_FATAL_ERROR_READING);
|
BINLOG_FATAL_ERROR_READING);
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}
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}
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/**
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* Check whether the current binlog file can be changed
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*
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* @param router The curret router instance
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* @param change_master The options in CHANGE_MASTER TO command
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* @param error Pointer to outout error message
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|
*
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* @return True if binlog can be changed or false.
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*/
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static bool blr_binlog_change_check(const ROUTER_INSTANCE *router,
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const CHANGE_MASTER_OPTIONS change_master,
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|
char *error)
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||||||
|
{
|
||||||
|
char *master_logfile = NULL;
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||||||
|
|
||||||
|
/**
|
||||||
|
* MASTER_LOG_FILE is not set in CHANGE MASTER TO.
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||||||
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* If binlog server is not configured and
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||||||
|
* mariadb10_master_gtid is not set, then return an error.
|
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|
*/
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|
if (change_master.binlog_file == NULL)
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|
{
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|
if (router->master_state == BLRM_UNCONFIGURED &&
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|
!router->mariadb10_master_gtid)
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{
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snprintf(error,
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BINLOG_ERROR_MSG_LEN,
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"Router is not configured for master connection, "
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"MASTER_LOG_FILE is required");
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return false;
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|
}
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|
else
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{
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return true;
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|
}
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|
}
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else
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||||||
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/**
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||||||
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* If binlog file is set in CHANGE MASTER TO
|
||||||
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* and MASTER_USE_GTID option is on, then return an error.
|
||||||
|
*/
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||||||
|
{
|
||||||
|
/**
|
||||||
|
* Check first MASTER_USE_GTID option:
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||||||
|
*
|
||||||
|
* if not present return an error:
|
||||||
|
*/
|
||||||
|
if (router->mariadb10_master_gtid &&
|
||||||
|
!change_master.use_mariadb10_gtid)
|
||||||
|
{
|
||||||
|
snprintf(error,
|
||||||
|
BINLOG_ERROR_MSG_LEN,
|
||||||
|
"%s MASTER_USE_GTID=Slave_pos is required",
|
||||||
|
router->master_state == BLRM_UNCONFIGURED ?
|
||||||
|
"Router is not configured for master connection," :
|
||||||
|
"Cannot use MASTER_LOG_FILE for master connection,");
|
||||||
|
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
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||||||
|
return true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
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||||||
|
return true;
|
||||||
|
}
|
||||||
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|
||||||
|
/**
|
||||||
|
* Set the new binlog filenanme from MASTER_LOG_FILE
|
||||||
|
*
|
||||||
|
* If no name change, the current router file is set.
|
||||||
|
* Note:
|
||||||
|
* Empty filename, MASTER_LOG_FILE = '', can be passed only
|
||||||
|
* if mariadb10_master_gtid option is set.
|
||||||
|
*
|
||||||
|
* @param router The router instance
|
||||||
|
* @param binlog_file The binlog file in MASTER_LOG_FILE
|
||||||
|
* @param error Ouput error message
|
||||||
|
* @param new_logfile The new log file name
|
||||||
|
*
|
||||||
|
* @return True if binlog name has been set or false
|
||||||
|
* on errors
|
||||||
|
*/
|
||||||
|
static bool blr_change_binlog_name(ROUTER_INSTANCE *router,
|
||||||
|
char *binlog_file,
|
||||||
|
char **new_logfile,
|
||||||
|
char *error)
|
||||||
|
{
|
||||||
|
bool ret = true;
|
||||||
|
|
||||||
|
/* MASTER_LOG_FILE is not present in CHANGE MASTER TO */
|
||||||
|
if (binlog_file == NULL)
|
||||||
|
{
|
||||||
|
/* Use current binlog file */
|
||||||
|
*new_logfile = MXS_STRDUP_A(router->binlog_name);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
/**
|
||||||
|
* Change the binlog filename as from MASTER_LOG_FILE
|
||||||
|
* New binlog file can be:
|
||||||
|
* - the next in sequence router file
|
||||||
|
* - current router file
|
||||||
|
* - empty if router->mariadb10_master_gtid is set.
|
||||||
|
*/
|
||||||
|
*new_logfile = blr_set_master_logfile(router,
|
||||||
|
binlog_file,
|
||||||
|
error);
|
||||||
|
if (*new_logfile == NULL)
|
||||||
|
{
|
||||||
|
if (!router->mariadb10_master_gtid ||
|
||||||
|
strlen(binlog_file) > 1)
|
||||||
|
{
|
||||||
|
/* Binlog name can not be changed */
|
||||||
|
ret = false;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
*new_logfile = MXS_STRDUP_A("");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Apply binlog filename and position changes
|
||||||
|
*
|
||||||
|
* @param router The current router instance
|
||||||
|
* @param change_master The change master options
|
||||||
|
* @param error The error message to fill
|
||||||
|
* @param new_logfile The new binlog filename
|
||||||
|
* set in previous stage
|
||||||
|
*
|
||||||
|
* @return True if changes have been set
|
||||||
|
* or false on errors.
|
||||||
|
*/
|
||||||
|
static bool blr_apply_changes(ROUTER_INSTANCE *router,
|
||||||
|
CHANGE_MASTER_OPTIONS change_master,
|
||||||
|
char *new_logfile,
|
||||||
|
char *error)
|
||||||
|
{
|
||||||
|
bool ret = true;
|
||||||
|
char *master_log_pos = NULL;
|
||||||
|
long long pos = 0;
|
||||||
|
|
||||||
|
/* Set new binlog position from MASTER_LOG_POS */
|
||||||
|
master_log_pos = change_master.binlog_pos;
|
||||||
|
if (master_log_pos == NULL)
|
||||||
|
{
|
||||||
|
pos = 0;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
pos = atoll(master_log_pos);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Binlog name and position are checked if:
|
||||||
|
* - mariadb10_master_gtid is off and
|
||||||
|
* - master connection is already configured.
|
||||||
|
* Checks:
|
||||||
|
* (1) filename is different from current router log file and pos != 4
|
||||||
|
* (2) position is not current one for current file
|
||||||
|
|
||||||
|
* Binlog file and pos can set after all checks.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* MariaDB 10 GTID request */
|
||||||
|
if (router->mariadb10_master_gtid)
|
||||||
|
{
|
||||||
|
if (change_master.use_mariadb10_gtid)
|
||||||
|
{
|
||||||
|
/* MASTER_USE_GTID=Slave_pos is set */
|
||||||
|
MXS_INFO("%s: MASTER_USE_GTID is [%s]",
|
||||||
|
router->service->name,
|
||||||
|
change_master.use_mariadb10_gtid);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Always log the current GTID value with CHANGE_MASTER TO */
|
||||||
|
MXS_INFO("%s: CHANGE MASTER TO, current GTID value is [%s]",
|
||||||
|
router->service->name,
|
||||||
|
router->last_mariadb_gtid);
|
||||||
|
|
||||||
|
/* Always set empty filename at pos 4 with CHANGE_MASTER TO */
|
||||||
|
strcpy(router->binlog_name, "");
|
||||||
|
|
||||||
|
router->current_pos = 4;
|
||||||
|
router->binlog_position = 4;
|
||||||
|
router->current_safe_event = 4;
|
||||||
|
}
|
||||||
|
/* The new filename is not the current one */
|
||||||
|
else if (strcmp(new_logfile, router->binlog_name) != 0 &&
|
||||||
|
router->master_state != BLRM_UNCONFIGURED)
|
||||||
|
{
|
||||||
|
if (master_log_pos == NULL)
|
||||||
|
{
|
||||||
|
snprintf(error,
|
||||||
|
BINLOG_ERROR_MSG_LEN,
|
||||||
|
"Please provide an explicit MASTER_LOG_POS "
|
||||||
|
"for new MASTER_LOG_FILE %s: "
|
||||||
|
"Permitted binlog pos is %d. "
|
||||||
|
"Current master_log_file=%s, master_log_pos=%lu",
|
||||||
|
new_logfile,
|
||||||
|
4,
|
||||||
|
router->binlog_name,
|
||||||
|
router->current_pos);
|
||||||
|
|
||||||
|
ret = false;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
if (pos != 4)
|
||||||
|
{
|
||||||
|
snprintf(error,
|
||||||
|
BINLOG_ERROR_MSG_LEN,
|
||||||
|
"Can not set MASTER_LOG_POS to %s for "
|
||||||
|
"MASTER_LOG_FILE %s: "
|
||||||
|
"Permitted binlog pos is %d. "
|
||||||
|
"Current master_log_file=%s, master_log_pos=%lu",
|
||||||
|
master_log_pos,
|
||||||
|
new_logfile,
|
||||||
|
4,
|
||||||
|
router->binlog_name,
|
||||||
|
router->current_pos);
|
||||||
|
|
||||||
|
ret = false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Set new binlog name at pos 4 */
|
||||||
|
if (ret)
|
||||||
|
{
|
||||||
|
strcpy(router->binlog_name, new_logfile);
|
||||||
|
|
||||||
|
router->current_pos = 4;
|
||||||
|
router->binlog_position = 4;
|
||||||
|
router->current_safe_event = 4;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Close current file binlog file,
|
||||||
|
* next start slave will create the new one
|
||||||
|
*/
|
||||||
|
fsync(router->binlog_fd);
|
||||||
|
close(router->binlog_fd);
|
||||||
|
router->binlog_fd = -1;
|
||||||
|
|
||||||
|
MXS_INFO("%s: New MASTER_LOG_FILE is [%s]",
|
||||||
|
router->service->name,
|
||||||
|
router->binlog_name);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
/**
|
||||||
|
* Same binlog or master connection not configured
|
||||||
|
* Position cannot be different from
|
||||||
|
* current pos or 4 (if BLRM_UNCONFIGURED).
|
||||||
|
* Note:
|
||||||
|
* pos is not checked if router->mariadb10_master_gtid is set
|
||||||
|
*/
|
||||||
|
if (router->master_state == BLRM_UNCONFIGURED)
|
||||||
|
{
|
||||||
|
if (master_log_pos != NULL && pos != 4)
|
||||||
|
{
|
||||||
|
snprintf(error,
|
||||||
|
BINLOG_ERROR_MSG_LEN,
|
||||||
|
"Can not set MASTER_LOG_POS to %s: "
|
||||||
|
"Permitted binlog pos is 4. Specified master_log_file=%s",
|
||||||
|
master_log_pos,
|
||||||
|
new_logfile);
|
||||||
|
|
||||||
|
ret = false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
if (master_log_pos != NULL && pos != router->current_pos)
|
||||||
|
{
|
||||||
|
snprintf(error,
|
||||||
|
BINLOG_ERROR_MSG_LEN, "Can not set MASTER_LOG_POS to %s: "
|
||||||
|
"Permitted binlog pos is %lu. "
|
||||||
|
"Current master_log_file=%s, master_log_pos=%lu",
|
||||||
|
master_log_pos,
|
||||||
|
router->current_pos,
|
||||||
|
router->binlog_name,
|
||||||
|
router->current_pos);
|
||||||
|
|
||||||
|
ret = false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|||||||
Reference in New Issue
Block a user