103 lines
4.4 KiB
JavaScript
103 lines
4.4 KiB
JavaScript
"use strict";
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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const mysql_1 = __importDefault(require("mysql"));
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const child_process_1 = require("child_process");
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const util_1 = require("util");
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function getConnection(config) {
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return mysql_1.default.createConnection(config);
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}
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function getMasterStatus(config) {
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return new Promise((resolve, reject) => {
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const connection = getConnection(config);
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connection.query("SHOW MASTER STATUS", (error, results) => {
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connection.end();
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if (error)
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reject(error);
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else
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resolve(results[0]);
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});
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});
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}
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function syncDatabases() {
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return __awaiter(this, void 0, void 0, function* () {
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const config = {
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host: "localhost",
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user: "root",
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password: "your_password",
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};
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let lastPosition = null; // Track last synced position
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while (true) {
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try {
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// Get current master status
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const { File, Position } = yield getMasterStatus(config);
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// Determine start position (use lastPosition or 4 if first run)
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const startPosition = lastPosition !== null ? lastPosition + 1 : 4;
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if (startPosition >= Position) {
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yield new Promise((resolve) => setTimeout(resolve, 5000)); // Wait 5 seconds if no new changes
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continue;
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}
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// Execute mysqlbinlog to get changes
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const execPromise = (0, util_1.promisify)(child_process_1.exec);
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const { stdout } = yield execPromise(`mysqlbinlog --database=db_master ${File} --start-position=${startPosition} --stop-position=${Position}`);
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if (stdout) {
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const connection = getConnection(Object.assign(Object.assign({}, config), { database: "db_slave" }));
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return new Promise((resolve, reject) => {
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connection.query(stdout, (error) => {
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connection.end();
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if (error)
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reject(error);
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else {
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lastPosition = Position;
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console.log(`Synced up to position ${Position} at ${new Date().toISOString()}`);
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resolve(null);
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}
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});
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});
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}
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}
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catch (error) {
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console.error("Sync error:", error);
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}
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yield new Promise((resolve) => setTimeout(resolve, 5000)); // Check every 5 seconds
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}
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});
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}
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// Initialize db_slave with db_master data
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function initializeSlave() {
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return __awaiter(this, void 0, void 0, function* () {
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const config = {
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host: "localhost",
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user: "root",
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password: "your_password",
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};
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try {
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yield (0, util_1.promisify)(child_process_1.exec)(`mysqldump -u ${config.user} -p${config.password} db_master > db_master_backup.sql`);
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yield (0, util_1.promisify)(child_process_1.exec)(`mysql -u ${config.user} -p${config.password} db_slave < db_master_backup.sql`);
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console.log("Slave initialized with master data");
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}
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catch (error) {
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console.error("Initialization error:", error);
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}
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});
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}
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// Run the sync process
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function main() {
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return __awaiter(this, void 0, void 0, function* () {
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yield initializeSlave();
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yield syncDatabases();
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});
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}
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main().catch(console.error);
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