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|
#!/usr/bin/env node
const minimist = require('minimist')
const loggerModule = require('./lib/logger')
const config = require('./lib/config')
const {Server, ResponseMessage, RequestMessage} = require('./lib/server')
const WorkersList = require('./lib/workers-list')
const package_json = require('../package.json')
/**
* @type {Logger}
*/
let logger
/**
* @type {Server}
*/
let server
/**
* @type WorkersList
*/
let workers
main().catch(e => {
console.error(e)
process.exit(1)
})
async function main() {
if (process.argv.length < 3) {
usage()
process.exit(0)
}
process.on('SIGINT', term)
process.on('SIGTERM', term)
const argv = minimist(process.argv.slice(2))
if (argv.help) {
usage()
process.exit(0)
}
if (argv.version) {
console.log(package_json.version)
process.exit(0)
}
if (!argv.config)
throw new Error('--config option is required')
// read config
try {
config.parseMasterConfig(argv.config)
} catch (e) {
console.error(`config parsing error: ${e.message}`)
process.exit(1)
}
await loggerModule.init({
file: config.get('log_file'),
levelFile: config.get('log_level_file'),
levelConsole: config.get('log_level_console'),
})
logger = loggerModule.getLogger('jobd-master')
workers = new WorkersList()
// start server
server = new Server()
server.on('new-connection', (connection) => {
connection.on('request-message', onRequestMessage)
})
server.start(config.get('port'), config.get('host'))
logger.info('server started')
}
/**
* @param {RequestMessage|ResponseMessage} message
* @param {Connection} connection
* @return {Promise<*>}
*/
async function onRequestMessage(message, connection) {
try {
logger.info('onMessage:', message)
switch (message.requestType) {
case 'register-worker': {
const targets = message.requestData?.targets || []
if (!targets.length) {
connection.send(
new ResponseMessage(message.requestNo)
.setError(`targets are empty`)
)
break
}
workers.add(connection, targets)
connection.send(
new ResponseMessage(message.requestNo)
.setData('ok')
)
break
}
case 'poke': {
const targets = message.requestData?.targets || []
if (!targets.length) {
connection.send(
new ResponseMessage(message.requestNo)
.setError(`targets are empty`)
)
break
}
workers.poke(targets)
connection.send(
new ResponseMessage(message.requestNo)
.setData('ok')
)
break
}
case 'status':
const info = await workers.getInfo(message.requestData?.poll_workers || false)
let status = {
workers: info,
memoryUsage: process.memoryUsage()
}
connection.send(
new ResponseMessage(message.requestNo)
.setData(status)
)
break
default:
connection.send(
new ResponseMessage(message.requestNo)
.setError(`unknown request type: '${message.requestType}'`)
)
break
}
} catch (error) {
logger.error(`error while handling message:`, message, error)
connection.send(
new ResponseMessage(message.requestNo)
.setError('server error: ' + error?.message)
)
}
}
function usage() {
let s = `${process.argv[1]} OPTIONS
Options:
--config <path>
--help
--version`
console.log(s)
}
function term() {
if (logger)
logger.info('shutdown')
loggerModule.shutdown(function() {
process.exit()
})
}
|
