mirror of
https://github.com/n8n-io/n8n.git
synced 2024-11-10 06:34:05 -08:00
23bd71b82a
* feat(RabbitMQ Trigger Node): Automatically reconnect on disconnect * ⚡ Retry indefinetly * ⚡ Also automatically retry activation issues on startup
464 lines
15 KiB
TypeScript
464 lines
15 KiB
TypeScript
/* eslint-disable @typescript-eslint/no-non-null-assertion */
|
|
/* eslint-disable @typescript-eslint/await-thenable */
|
|
/* eslint-disable @typescript-eslint/no-unsafe-assignment */
|
|
/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
|
|
/* eslint-disable @typescript-eslint/unbound-method */
|
|
/* eslint-disable no-console */
|
|
/* eslint-disable @typescript-eslint/no-unsafe-call */
|
|
/* eslint-disable @typescript-eslint/no-unsafe-member-access */
|
|
import localtunnel from 'localtunnel';
|
|
import { BinaryDataManager, TUNNEL_SUBDOMAIN_ENV, UserSettings } from 'n8n-core';
|
|
import { Command, flags } from '@oclif/command';
|
|
// eslint-disable-next-line import/no-extraneous-dependencies
|
|
import Redis from 'ioredis';
|
|
|
|
import { IDataObject, LoggerProxy } from 'n8n-workflow';
|
|
import { createHash } from 'crypto';
|
|
import config from '../config';
|
|
import {
|
|
ActiveExecutions,
|
|
ActiveWorkflowRunner,
|
|
CredentialsOverwrites,
|
|
CredentialTypes,
|
|
DatabaseType,
|
|
Db,
|
|
ExternalHooks,
|
|
GenericHelpers,
|
|
InternalHooksManager,
|
|
LoadNodesAndCredentials,
|
|
NodeTypes,
|
|
Server,
|
|
TestWebhooks,
|
|
WaitTracker,
|
|
} from '../src';
|
|
|
|
import { getLogger } from '../src/Logger';
|
|
import { getAllInstalledPackages } from '../src/CommunityNodes/packageModel';
|
|
|
|
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-var-requires
|
|
const open = require('open');
|
|
|
|
let activeWorkflowRunner: ActiveWorkflowRunner.ActiveWorkflowRunner | undefined;
|
|
let processExitCode = 0;
|
|
|
|
export class Start extends Command {
|
|
static description = 'Starts n8n. Makes Web-UI available and starts active workflows';
|
|
|
|
static examples = [
|
|
`$ n8n start`,
|
|
`$ n8n start --tunnel`,
|
|
`$ n8n start -o`,
|
|
`$ n8n start --tunnel -o`,
|
|
];
|
|
|
|
static flags = {
|
|
help: flags.help({ char: 'h' }),
|
|
open: flags.boolean({
|
|
char: 'o',
|
|
description: 'opens the UI automatically in browser',
|
|
}),
|
|
tunnel: flags.boolean({
|
|
description:
|
|
'runs the webhooks via a hooks.n8n.cloud tunnel server. Use only for testing and development!',
|
|
}),
|
|
reinstallMissingPackages: flags.boolean({
|
|
description:
|
|
'Attempts to self heal n8n if packages with nodes are missing. Might drastically increase startup times.',
|
|
}),
|
|
};
|
|
|
|
/**
|
|
* Opens the UI in browser
|
|
*/
|
|
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
|
|
static openBrowser() {
|
|
const editorUrl = GenericHelpers.getBaseUrl();
|
|
|
|
// eslint-disable-next-line @typescript-eslint/no-unused-vars
|
|
open(editorUrl, { wait: true }).catch((error: Error) => {
|
|
console.log(
|
|
`\nWas not able to open URL in browser. Please open manually by visiting:\n${editorUrl}\n`,
|
|
);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Stoppes the n8n in a graceful way.
|
|
* Make for example sure that all the webhooks from third party services
|
|
* get removed.
|
|
*/
|
|
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
|
|
static async stopProcess() {
|
|
getLogger().info('\nStopping n8n...');
|
|
|
|
try {
|
|
// Stop with trying to activate workflows that could not be activated
|
|
activeWorkflowRunner?.removeAllQueuedWorkflowActivations();
|
|
|
|
const externalHooks = ExternalHooks();
|
|
await externalHooks.run('n8n.stop', []);
|
|
|
|
setTimeout(() => {
|
|
// In case that something goes wrong with shutdown we
|
|
// kill after max. 30 seconds no matter what
|
|
console.log(`process exited after 30s`);
|
|
process.exit(processExitCode);
|
|
}, 30000);
|
|
|
|
await InternalHooksManager.getInstance().onN8nStop();
|
|
|
|
const skipWebhookDeregistration = config.getEnv(
|
|
'endpoints.skipWebhoooksDeregistrationOnShutdown',
|
|
);
|
|
|
|
const removePromises = [];
|
|
if (activeWorkflowRunner !== undefined && !skipWebhookDeregistration) {
|
|
removePromises.push(activeWorkflowRunner.removeAll());
|
|
}
|
|
|
|
// Remove all test webhooks
|
|
const testWebhooks = TestWebhooks.getInstance();
|
|
removePromises.push(testWebhooks.removeAll());
|
|
|
|
await Promise.all(removePromises);
|
|
|
|
// Wait for active workflow executions to finish
|
|
const activeExecutionsInstance = ActiveExecutions.getInstance();
|
|
let executingWorkflows = activeExecutionsInstance.getActiveExecutions();
|
|
|
|
let count = 0;
|
|
while (executingWorkflows.length !== 0) {
|
|
if (count++ % 4 === 0) {
|
|
console.log(`Waiting for ${executingWorkflows.length} active executions to finish...`);
|
|
// eslint-disable-next-line array-callback-return
|
|
executingWorkflows.map((execution) => {
|
|
console.log(` - Execution ID ${execution.id}, workflow ID: ${execution.workflowId}`);
|
|
});
|
|
}
|
|
// eslint-disable-next-line no-await-in-loop
|
|
await new Promise((resolve) => {
|
|
setTimeout(resolve, 500);
|
|
});
|
|
executingWorkflows = activeExecutionsInstance.getActiveExecutions();
|
|
}
|
|
} catch (error) {
|
|
console.error('There was an error shutting down n8n.', error);
|
|
}
|
|
|
|
process.exit(processExitCode);
|
|
}
|
|
|
|
async run() {
|
|
// Make sure that n8n shuts down gracefully if possible
|
|
process.on('SIGTERM', Start.stopProcess);
|
|
process.on('SIGINT', Start.stopProcess);
|
|
|
|
// eslint-disable-next-line @typescript-eslint/no-shadow
|
|
const { flags } = this.parse(Start);
|
|
|
|
// Wrap that the process does not close but we can still use async
|
|
await (async () => {
|
|
try {
|
|
const logger = getLogger();
|
|
LoggerProxy.init(logger);
|
|
logger.info('Initializing n8n process');
|
|
|
|
// Start directly with the init of the database to improve startup time
|
|
const startDbInitPromise = Db.init().catch((error: Error) => {
|
|
logger.error(`There was an error initializing DB: "${error.message}"`);
|
|
|
|
processExitCode = 1;
|
|
// @ts-ignore
|
|
process.emit('SIGINT');
|
|
process.exit(1);
|
|
});
|
|
|
|
// Make sure the settings exist
|
|
const userSettings = await UserSettings.prepareUserSettings();
|
|
|
|
if (!config.getEnv('userManagement.jwtSecret')) {
|
|
// If we don't have a JWT secret set, generate
|
|
// one based and save to config.
|
|
const encryptionKey = await UserSettings.getEncryptionKey();
|
|
|
|
// For a key off every other letter from encryption key
|
|
// CAREFUL: do not change this or it breaks all existing tokens.
|
|
let baseKey = '';
|
|
for (let i = 0; i < encryptionKey.length; i += 2) {
|
|
baseKey += encryptionKey[i];
|
|
}
|
|
config.set(
|
|
'userManagement.jwtSecret',
|
|
createHash('sha256').update(baseKey).digest('hex'),
|
|
);
|
|
}
|
|
|
|
// Load all node and credential types
|
|
const loadNodesAndCredentials = LoadNodesAndCredentials();
|
|
await loadNodesAndCredentials.init();
|
|
|
|
// Load all external hooks
|
|
const externalHooks = ExternalHooks();
|
|
await externalHooks.init();
|
|
|
|
// Add the found types to an instance other parts of the application can use
|
|
const nodeTypes = NodeTypes();
|
|
await nodeTypes.init(loadNodesAndCredentials.nodeTypes);
|
|
const credentialTypes = CredentialTypes();
|
|
await credentialTypes.init(loadNodesAndCredentials.credentialTypes);
|
|
|
|
// Load the credentials overwrites if any exist
|
|
const credentialsOverwrites = CredentialsOverwrites();
|
|
await credentialsOverwrites.init();
|
|
|
|
// Wait till the database is ready
|
|
await startDbInitPromise;
|
|
|
|
const installedPackages = await getAllInstalledPackages();
|
|
const missingPackages = new Set<{
|
|
packageName: string;
|
|
version: string;
|
|
}>();
|
|
installedPackages.forEach((installedpackage) => {
|
|
installedpackage.installedNodes.forEach((installedNode) => {
|
|
if (!loadNodesAndCredentials.nodeTypes[installedNode.type]) {
|
|
// Leave the list ready for installing in case we need.
|
|
missingPackages.add({
|
|
packageName: installedpackage.packageName,
|
|
version: installedpackage.installedVersion,
|
|
});
|
|
}
|
|
});
|
|
});
|
|
|
|
await UserSettings.getEncryptionKey();
|
|
|
|
// Load settings from database and set them to config.
|
|
const databaseSettings = await Db.collections.Settings.find({ loadOnStartup: true });
|
|
databaseSettings.forEach((setting) => {
|
|
config.set(setting.key, JSON.parse(setting.value));
|
|
});
|
|
|
|
config.set('nodes.packagesMissing', '');
|
|
if (missingPackages.size) {
|
|
LoggerProxy.error(
|
|
'n8n detected that some packages are missing. For more information, visit https://docs.n8n.io/integrations/community-nodes/troubleshooting/',
|
|
);
|
|
|
|
if (flags.reinstallMissingPackages || process.env.N8N_REINSTALL_MISSING_PACKAGES) {
|
|
LoggerProxy.info('Attempting to reinstall missing packages', { missingPackages });
|
|
try {
|
|
// Optimistic approach - stop if any installation fails
|
|
// eslint-disable-next-line no-restricted-syntax
|
|
for (const missingPackage of missingPackages) {
|
|
// eslint-disable-next-line no-await-in-loop
|
|
void (await loadNodesAndCredentials.loadNpmModule(
|
|
missingPackage.packageName,
|
|
missingPackage.version,
|
|
));
|
|
missingPackages.delete(missingPackage);
|
|
}
|
|
LoggerProxy.info(
|
|
'Packages reinstalled successfully. Resuming regular initialization.',
|
|
);
|
|
} catch (error) {
|
|
LoggerProxy.error('n8n was unable to install the missing packages.');
|
|
}
|
|
}
|
|
}
|
|
if (missingPackages.size) {
|
|
config.set(
|
|
'nodes.packagesMissing',
|
|
Array.from(missingPackages)
|
|
.map((missingPackage) => `${missingPackage.packageName}@${missingPackage.version}`)
|
|
.join(' '),
|
|
);
|
|
}
|
|
|
|
if (config.getEnv('executions.mode') === 'queue') {
|
|
const redisHost = config.getEnv('queue.bull.redis.host');
|
|
const redisPassword = config.getEnv('queue.bull.redis.password');
|
|
const redisPort = config.getEnv('queue.bull.redis.port');
|
|
const redisDB = config.getEnv('queue.bull.redis.db');
|
|
const redisConnectionTimeoutLimit = config.getEnv('queue.bull.redis.timeoutThreshold');
|
|
let lastTimer = 0;
|
|
let cumulativeTimeout = 0;
|
|
|
|
const settings = {
|
|
// eslint-disable-next-line @typescript-eslint/no-unused-vars
|
|
retryStrategy: (times: number): number | null => {
|
|
const now = Date.now();
|
|
if (now - lastTimer > 30000) {
|
|
// Means we had no timeout at all or last timeout was temporary and we recovered
|
|
lastTimer = now;
|
|
cumulativeTimeout = 0;
|
|
} else {
|
|
cumulativeTimeout += now - lastTimer;
|
|
lastTimer = now;
|
|
if (cumulativeTimeout > redisConnectionTimeoutLimit) {
|
|
logger.error(
|
|
// eslint-disable-next-line @typescript-eslint/restrict-template-expressions
|
|
`Unable to connect to Redis after ${redisConnectionTimeoutLimit}. Exiting process.`,
|
|
);
|
|
process.exit(1);
|
|
}
|
|
}
|
|
return 500;
|
|
},
|
|
} as IDataObject;
|
|
|
|
if (redisHost) {
|
|
settings.host = redisHost;
|
|
}
|
|
if (redisPassword) {
|
|
settings.password = redisPassword;
|
|
}
|
|
if (redisPort) {
|
|
settings.port = redisPort;
|
|
}
|
|
if (redisDB) {
|
|
settings.db = redisDB;
|
|
}
|
|
|
|
// This connection is going to be our heartbeat
|
|
// IORedis automatically pings redis and tries to reconnect
|
|
// We will be using the retryStrategy above
|
|
// to control how and when to exit.
|
|
const redis = new Redis(settings);
|
|
|
|
redis.on('error', (error) => {
|
|
if (error.toString().includes('ECONNREFUSED') === true) {
|
|
logger.warn('Redis unavailable - trying to reconnect...');
|
|
} else {
|
|
// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
|
|
logger.warn('Error with Redis: ', error);
|
|
}
|
|
});
|
|
}
|
|
|
|
const dbType = (await GenericHelpers.getConfigValue('database.type')) as DatabaseType;
|
|
|
|
if (dbType === 'sqlite') {
|
|
const shouldRunVacuum = config.getEnv('database.sqlite.executeVacuumOnStartup');
|
|
if (shouldRunVacuum) {
|
|
// eslint-disable-next-line @typescript-eslint/no-floating-promises
|
|
await Db.collections.Execution.query('VACUUM;');
|
|
}
|
|
}
|
|
|
|
if (flags.tunnel) {
|
|
this.log('\nWaiting for tunnel ...');
|
|
|
|
let tunnelSubdomain;
|
|
if (
|
|
process.env[TUNNEL_SUBDOMAIN_ENV] !== undefined &&
|
|
process.env[TUNNEL_SUBDOMAIN_ENV] !== ''
|
|
) {
|
|
tunnelSubdomain = process.env[TUNNEL_SUBDOMAIN_ENV];
|
|
} else if (userSettings.tunnelSubdomain !== undefined) {
|
|
tunnelSubdomain = userSettings.tunnelSubdomain;
|
|
}
|
|
|
|
if (tunnelSubdomain === undefined) {
|
|
// When no tunnel subdomain did exist yet create a new random one
|
|
const availableCharacters = 'abcdefghijklmnopqrstuvwxyz0123456789';
|
|
userSettings.tunnelSubdomain = Array.from({ length: 24 })
|
|
.map(() => {
|
|
return availableCharacters.charAt(
|
|
Math.floor(Math.random() * availableCharacters.length),
|
|
);
|
|
})
|
|
.join('');
|
|
|
|
await UserSettings.writeUserSettings(userSettings);
|
|
}
|
|
|
|
const tunnelSettings: localtunnel.TunnelConfig = {
|
|
host: 'https://hooks.n8n.cloud',
|
|
subdomain: tunnelSubdomain,
|
|
};
|
|
|
|
const port = config.getEnv('port');
|
|
|
|
// @ts-ignore
|
|
const webhookTunnel = await localtunnel(port, tunnelSettings);
|
|
|
|
process.env.WEBHOOK_URL = `${webhookTunnel.url}/`;
|
|
this.log(`Tunnel URL: ${process.env.WEBHOOK_URL}\n`);
|
|
this.log(
|
|
'IMPORTANT! Do not share with anybody as it would give people access to your n8n instance!',
|
|
);
|
|
}
|
|
|
|
const instanceId = await UserSettings.getInstanceId();
|
|
const { cli } = await GenericHelpers.getVersions();
|
|
InternalHooksManager.init(instanceId, cli, nodeTypes);
|
|
|
|
const binaryDataConfig = config.getEnv('binaryDataManager');
|
|
await BinaryDataManager.init(binaryDataConfig, true);
|
|
|
|
await Server.start();
|
|
|
|
// Start to get active workflows and run their triggers
|
|
activeWorkflowRunner = ActiveWorkflowRunner.getInstance();
|
|
await activeWorkflowRunner.init();
|
|
|
|
WaitTracker();
|
|
|
|
const editorUrl = GenericHelpers.getBaseUrl();
|
|
this.log(`\nEditor is now accessible via:\n${editorUrl}`);
|
|
|
|
const saveManualExecutions = config.getEnv('executions.saveDataManualExecutions');
|
|
|
|
if (saveManualExecutions) {
|
|
this.log('\nManual executions will be visible only for the owner');
|
|
}
|
|
|
|
// Allow to open n8n editor by pressing "o"
|
|
if (Boolean(process.stdout.isTTY) && process.stdin.setRawMode) {
|
|
process.stdin.setRawMode(true);
|
|
process.stdin.resume();
|
|
process.stdin.setEncoding('utf8');
|
|
// eslint-disable-next-line @typescript-eslint/no-unused-vars
|
|
let inputText = '';
|
|
|
|
if (flags.open) {
|
|
Start.openBrowser();
|
|
}
|
|
this.log(`\nPress "o" to open in Browser.`);
|
|
process.stdin.on('data', (key: string) => {
|
|
if (key === 'o') {
|
|
Start.openBrowser();
|
|
inputText = '';
|
|
} else if (key.charCodeAt(0) === 3) {
|
|
// Ctrl + c got pressed
|
|
// eslint-disable-next-line @typescript-eslint/no-floating-promises
|
|
Start.stopProcess();
|
|
} else {
|
|
// When anything else got pressed, record it and send it on enter into the child process
|
|
// eslint-disable-next-line no-lonely-if
|
|
if (key.charCodeAt(0) === 13) {
|
|
// send to child process and print in terminal
|
|
process.stdout.write('\n');
|
|
inputText = '';
|
|
} else {
|
|
// record it and write into terminal
|
|
// eslint-disable-next-line @typescript-eslint/no-unused-vars
|
|
inputText += key;
|
|
process.stdout.write(key);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
} catch (error) {
|
|
// eslint-disable-next-line @typescript-eslint/restrict-template-expressions
|
|
this.error(`There was an error: ${error.message}`);
|
|
|
|
processExitCode = 1;
|
|
// @ts-ignore
|
|
process.emit('SIGINT');
|
|
}
|
|
})();
|
|
}
|
|
}
|