Made server.tsx work with ssh tunnels and server stats. Moved admin settings.
This commit is contained in:
LukeGus
416
src/backend/ssh/server-stats.ts
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416
src/backend/ssh/server-stats.ts
Normal file
@@ -0,0 +1,416 @@
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import express from 'express';
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import chalk from 'chalk';
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import fetch from 'node-fetch';
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import net from 'net';
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import cors from 'cors';
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import { Client, type ConnectConfig } from 'ssh2';
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type HostRecord = {
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id: number;
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ip: string;
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port: number;
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username?: string;
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authType?: 'password' | 'key' | string;
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password?: string | null;
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key?: string | null;
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keyPassword?: string | null;
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keyType?: string | null;
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};
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type HostStatus = 'online' | 'offline';
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type StatusEntry = {
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status: HostStatus;
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lastChecked: string; // ISO string
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};
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const app = express();
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app.use(cors({
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origin: '*',
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methods: ['GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'OPTIONS'],
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allowedHeaders: ['Content-Type', 'Authorization']
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}));
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// Fallback explicit CORS headers to cover any edge cases
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app.use((req, res, next) => {
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res.header('Access-Control-Allow-Origin', '*');
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res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization');
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res.header('Access-Control-Allow-Methods', 'GET, POST, PUT, PATCH, DELETE, OPTIONS');
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if (req.method === 'OPTIONS') {
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return res.sendStatus(204);
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}
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next();
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});
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app.use(express.json());
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// Logger (customized for Server Stats)
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const statsIconSymbol = '📡';
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const getTimeStamp = (): string => chalk.gray(`[${new Date().toLocaleTimeString()}]`);
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const formatMessage = (level: string, colorFn: chalk.Chalk, message: string): string => {
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return `${getTimeStamp()} ${colorFn(`[${level.toUpperCase()}]`)} ${chalk.hex('#22c55e')(`[${statsIconSymbol}]`)} ${message}`;
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};
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const logger = {
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info: (msg: string): void => {
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console.log(formatMessage('info', chalk.cyan, msg));
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},
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warn: (msg: string): void => {
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console.warn(formatMessage('warn', chalk.yellow, msg));
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},
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error: (msg: string, err?: unknown): void => {
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console.error(formatMessage('error', chalk.redBright, msg));
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if (err) console.error(err);
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},
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success: (msg: string): void => {
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console.log(formatMessage('success', chalk.greenBright, msg));
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},
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debug: (msg: string): void => {
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if (process.env.NODE_ENV !== 'production') {
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console.debug(formatMessage('debug', chalk.magenta, msg));
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}
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}
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};
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// In-memory state of last known statuses
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const hostStatuses: Map<number, StatusEntry> = new Map();
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// Fetch all hosts from the database service (internal endpoint, no JWT)
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async function fetchAllHosts(): Promise<HostRecord[]> {
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const url = 'http://localhost:8081/ssh/db/host/internal';
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try {
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const resp = await fetch(url, {
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headers: { 'x-internal-request': '1' }
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});
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if (!resp.ok) {
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throw new Error(`DB service error: ${resp.status} ${resp.statusText}`);
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}
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const data = await resp.json();
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const hosts: HostRecord[] = (Array.isArray(data) ? data : []).map((h: any) => ({
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id: Number(h.id),
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ip: String(h.ip),
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port: Number(h.port) || 22,
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username: h.username,
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authType: h.authType,
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password: h.password ?? null,
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key: h.key ?? null,
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keyPassword: h.keyPassword ?? null,
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keyType: h.keyType ?? null,
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})).filter(h => !!h.id && !!h.ip && !!h.port);
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return hosts;
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} catch (err) {
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logger.error('Failed to fetch hosts from database service', err);
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return [];
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}
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}
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async function fetchHostById(id: number): Promise<HostRecord | undefined> {
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const all = await fetchAllHosts();
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return all.find(h => h.id === id);
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}
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function buildSshConfig(host: HostRecord): ConnectConfig {
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const base: ConnectConfig = {
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host: host.ip,
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port: host.port || 22,
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username: host.username || 'root',
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readyTimeout: 10_000,
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algorithms: {
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// keep defaults minimal to avoid negotiation issues
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}
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} as ConnectConfig;
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if (host.authType === 'password') {
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(base as any).password = host.password || '';
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} else if (host.authType === 'key') {
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if (host.key) {
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(base as any).privateKey = Buffer.from(host.key, 'utf8');
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}
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if (host.keyPassword) {
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(base as any).passphrase = host.keyPassword;
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}
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}
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return base;
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}
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async function withSshConnection<T>(host: HostRecord, fn: (client: Client) => Promise<T>): Promise<T> {
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return new Promise<T>((resolve, reject) => {
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const client = new Client();
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let settled = false;
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const onError = (err: Error) => {
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if (!settled) {
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settled = true;
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try { client.end(); } catch {}
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reject(err);
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}
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};
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client.on('ready', async () => {
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try {
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const result = await fn(client);
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if (!settled) {
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settled = true;
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try { client.end(); } catch {}
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resolve(result);
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}
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} catch (err: any) {
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onError(err);
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}
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});
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client.on('error', onError);
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client.on('timeout', () => onError(new Error('SSH connection timeout')));
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try {
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client.connect(buildSshConfig(host));
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} catch (err: any) {
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onError(err);
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}
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});
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}
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function execCommand(client: Client, command: string): Promise<{ stdout: string; stderr: string; code: number | null; }> {
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return new Promise((resolve, reject) => {
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client.exec(command, { pty: false }, (err, stream) => {
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if (err) return reject(err);
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let stdout = '';
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let stderr = '';
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let exitCode: number | null = null;
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stream.on('close', (code: number | undefined) => {
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exitCode = typeof code === 'number' ? code : null;
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resolve({ stdout, stderr, code: exitCode });
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}).on('data', (data: Buffer) => {
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stdout += data.toString('utf8');
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}).stderr.on('data', (data: Buffer) => {
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stderr += data.toString('utf8');
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});
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});
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});
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}
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function parseCpuLine(cpuLine: string): { total: number; idle: number } | undefined {
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const parts = cpuLine.trim().split(/\s+/);
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if (parts[0] !== 'cpu') return undefined;
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const nums = parts.slice(1).map(n => Number(n)).filter(n => Number.isFinite(n));
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if (nums.length < 4) return undefined;
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const idle = (nums[3] ?? 0) + (nums[4] ?? 0); // idle + iowait
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const total = nums.reduce((a, b) => a + b, 0);
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return { total, idle };
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}
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function toFixedNum(n: number | null | undefined, digits = 2): number | null {
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if (typeof n !== 'number' || !Number.isFinite(n)) return null;
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return Number(n.toFixed(digits));
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}
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function kibToGiB(kib: number): number {
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return kib / (1024 * 1024);
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}
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async function collectMetrics(host: HostRecord): Promise<{
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cpu: { percent: number | null; cores: number | null; load: [number, number, number] | null };
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memory: { percent: number | null; usedGiB: number | null; totalGiB: number | null };
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disk: { percent: number | null; usedHuman: string | null; totalHuman: string | null };
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}> {
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return withSshConnection(host, async (client) => {
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// CPU
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let cpuPercent: number | null = null;
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let cores: number | null = null;
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let loadTriplet: [number, number, number] | null = null;
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try {
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const stat1 = await execCommand(client, 'cat /proc/stat');
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await new Promise(r => setTimeout(r, 500));
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const stat2 = await execCommand(client, 'cat /proc/stat');
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const loadAvgOut = await execCommand(client, 'cat /proc/loadavg');
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const coresOut = await execCommand(client, 'nproc 2>/dev/null || grep -c ^processor /proc/cpuinfo');
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const cpuLine1 = (stat1.stdout.split('\n').find(l => l.startsWith('cpu ')) || '').trim();
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const cpuLine2 = (stat2.stdout.split('\n').find(l => l.startsWith('cpu ')) || '').trim();
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const a = parseCpuLine(cpuLine1);
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const b = parseCpuLine(cpuLine2);
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if (a && b) {
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const totalDiff = b.total - a.total;
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const idleDiff = b.idle - a.idle;
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const used = totalDiff - idleDiff;
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if (totalDiff > 0) cpuPercent = Math.max(0, Math.min(100, (used / totalDiff) * 100));
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}
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const laParts = loadAvgOut.stdout.trim().split(/\s+/);
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if (laParts.length >= 3) {
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loadTriplet = [Number(laParts[0]), Number(laParts[1]), Number(laParts[2])].map(v => Number.isFinite(v) ? Number(v) : 0) as [number, number, number];
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}
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const coresNum = Number((coresOut.stdout || '').trim());
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cores = Number.isFinite(coresNum) && coresNum > 0 ? coresNum : null;
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} catch (e) {
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cpuPercent = null;
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cores = null;
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loadTriplet = null;
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}
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// Memory
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let memPercent: number | null = null;
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let usedGiB: number | null = null;
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let totalGiB: number | null = null;
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try {
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const memInfo = await execCommand(client, 'cat /proc/meminfo');
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const lines = memInfo.stdout.split('\n');
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const getVal = (key: string) => {
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const line = lines.find(l => l.startsWith(key));
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if (!line) return null;
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const m = line.match(/\d+/);
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return m ? Number(m[0]) : null; // in kB
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};
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const totalKb = getVal('MemTotal:');
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const availKb = getVal('MemAvailable:');
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if (totalKb && availKb && totalKb > 0) {
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const usedKb = totalKb - availKb;
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memPercent = Math.max(0, Math.min(100, (usedKb / totalKb) * 100));
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usedGiB = kibToGiB(usedKb);
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totalGiB = kibToGiB(totalKb);
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}
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} catch (e) {
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memPercent = null;
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usedGiB = null;
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totalGiB = null;
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}
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// Disk
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let diskPercent: number | null = null;
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let usedHuman: string | null = null;
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let totalHuman: string | null = null;
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try {
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const diskOut = await execCommand(client, 'df -h -P / | tail -n +2');
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const line = diskOut.stdout.split('\n').map(l => l.trim()).filter(Boolean)[0] || '';
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// Expected columns: Filesystem Size Used Avail Use% Mounted
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const parts = line.split(/\s+/);
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if (parts.length >= 6) {
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totalHuman = parts[1] || null;
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usedHuman = parts[2] || null;
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const pctStr = (parts[4] || '').replace('%', '');
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const pctNum = Number(pctStr);
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diskPercent = Number.isFinite(pctNum) ? pctNum : null;
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}
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} catch (e) {
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diskPercent = null;
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usedHuman = null;
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totalHuman = null;
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}
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return {
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cpu: { percent: toFixedNum(cpuPercent, 0), cores, load: loadTriplet },
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memory: { percent: toFixedNum(memPercent, 0), usedGiB: usedGiB ? toFixedNum(usedGiB, 2) : null, totalGiB: totalGiB ? toFixedNum(totalGiB, 2) : null },
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disk: { percent: toFixedNum(diskPercent, 0), usedHuman, totalHuman },
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};
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});
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}
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function tcpPing(host: string, port: number, timeoutMs = 5000): Promise<boolean> {
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return new Promise((resolve) => {
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const socket = new net.Socket();
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let settled = false;
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const onDone = (result: boolean) => {
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if (settled) return;
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settled = true;
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try { socket.destroy(); } catch {}
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resolve(result);
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};
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socket.setTimeout(timeoutMs);
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socket.once('connect', () => onDone(true));
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socket.once('timeout', () => onDone(false));
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socket.once('error', () => onDone(false));
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socket.connect(port, host);
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});
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}
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async function pollStatusesOnce(): Promise<void> {
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const hosts = await fetchAllHosts();
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if (hosts.length === 0) {
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logger.warn('No hosts retrieved for status polling');
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return;
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}
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const now = new Date().toISOString();
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const checks = hosts.map(async (h) => {
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const isOnline = await tcpPing(h.ip, h.port, 5000);
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hostStatuses.set(h.id, { status: isOnline ? 'online' : 'offline', lastChecked: now });
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return isOnline;
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});
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const results = await Promise.allSettled(checks);
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const onlineCount = results.filter(r => r.status === 'fulfilled' && r.value === true).length;
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const offlineCount = hosts.length - onlineCount;
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}
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app.get('/status', async (req, res) => {
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// Return current cached statuses; if empty, trigger a poll
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if (hostStatuses.size === 0) {
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await pollStatusesOnce();
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}
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const result: Record<number, StatusEntry> = {};
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for (const [id, entry] of hostStatuses.entries()) {
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result[id] = entry;
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}
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res.json(result);
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});
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app.get('/status/:id', async (req, res) => {
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const id = Number(req.params.id);
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if (!id) {
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return res.status(400).json({ error: 'Invalid id' });
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}
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if (!hostStatuses.has(id)) {
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await pollStatusesOnce();
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}
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const entry = hostStatuses.get(id);
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if (!entry) {
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return res.status(404).json({ error: 'Host not found' });
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}
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res.json(entry);
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});
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app.post('/refresh', async (req, res) => {
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await pollStatusesOnce();
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res.json({ message: 'Refreshed' });
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});
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app.get('/metrics/:id', async (req, res) => {
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const id = Number(req.params.id);
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if (!id) {
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return res.status(400).json({ error: 'Invalid id' });
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}
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try {
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const host = await fetchHostById(id);
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if (!host) {
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return res.status(404).json({ error: 'Host not found' });
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}
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const metrics = await collectMetrics(host);
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res.json({ ...metrics, lastChecked: new Date().toISOString() });
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} catch (err) {
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logger.error('Failed to collect metrics', err);
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return res.json({
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cpu: { percent: null, cores: null, load: null },
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memory: { percent: null, usedGiB: null, totalGiB: null },
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disk: { percent: null, usedHuman: null, totalHuman: null },
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lastChecked: new Date().toISOString()
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});
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}
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});
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const PORT = 8085;
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app.listen(PORT, async () => {
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try {
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await pollStatusesOnce();
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} catch (err) {
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logger.error('Initial poll failed', err);
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}
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});
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// Background polling every minute
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setInterval(() => {
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pollStatusesOnce().catch(err => logger.error('Background poll failed', err));
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}, 60_000);
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