485 lines
13 KiB
JavaScript
485 lines
13 KiB
JavaScript
'use strict';
|
|
|
|
var express = require('express');
|
|
var router = express.Router();
|
|
var util = require('util');
|
|
var request = require('request');
|
|
var jsonfile = require('jsonfile');
|
|
var lxc = require('../lxc');
|
|
var doapi = require('../doapi')();
|
|
var settings = require('./workers.json');
|
|
|
|
// mapping of current used runners for quick loop up based on runner label
|
|
var label2runner = {};
|
|
|
|
//
|
|
var tagPrefix = settings.tagPrefix || 'clwV';
|
|
|
|
var workers = (function(){
|
|
// works array constructor. This will hold the works(order by creation) and all
|
|
// the methods interacting with the workers.
|
|
|
|
// base array that will be the workers objects.
|
|
var workers = [];
|
|
|
|
// persistent settings object
|
|
// .image is the currently used Digital Ocean snap shot ID
|
|
// .lastSnapShotId is the previous ID used Digital Ocean snap shot
|
|
// .version is the current worker version
|
|
// .size is the base Droplet size for worker creation
|
|
// .min is the minimum amount of workers that should exist
|
|
// .max is the maximum amount of works that ca exist
|
|
// .minAvail is the amount of empty workers there should be
|
|
workers.settings = settings;
|
|
|
|
// How many droplets are currently in the process of being created. It takes
|
|
// about 3 minutes to create a worker.
|
|
workers.currentCreating = 0;
|
|
|
|
workers.create = function(){
|
|
// manages the creation of a work from first call to all runners seeded
|
|
|
|
// dont create more workers then the settings file allows
|
|
if(workers.currentCreating > workers.settings.max ) return false;
|
|
workers.currentCreating++;
|
|
|
|
doapi.dropletToActive({
|
|
name: 'clw'+workers.settings.version+'-'+(Math.random()*100).toString().slice(-4),
|
|
image: workers.settings.image,
|
|
size: workers.settings.size,
|
|
onCreate: function(data){
|
|
doapi.dropletSetTag(tagPrefix+workers.settings.version, data.droplet.id);
|
|
},
|
|
onActive: function(worker, args){
|
|
workers.startRunners({
|
|
worker: workers.makeWorkerObj(worker),
|
|
onStart: function(runner, args){
|
|
workers.push(args.worker);
|
|
doapi.domianAddRecord({
|
|
domain: "codeland.us",
|
|
type: "A",
|
|
name: "*."+worker.name+".workers",
|
|
data: worker.publicIP
|
|
});
|
|
args.onStart = function(){};
|
|
},
|
|
onDone: function(args){
|
|
console.log("Seeded runners on", worker.name);
|
|
workers.currentCreating--;
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
};
|
|
|
|
workers.makeWorkerObj = function(worker){
|
|
// Create object for each worker.
|
|
|
|
worker.networks.v4.forEach(function(value){
|
|
worker[value.type+'IP'] = value.ip_address;
|
|
});
|
|
|
|
worker.availrunners = [];
|
|
worker.ip = worker.publicIP;
|
|
worker.usedrunners = 0;
|
|
worker.index = workers.length;
|
|
|
|
worker.getRunner = function(){
|
|
if(this.availrunners.length === 0) return false;
|
|
// console.log('getting runner from ', worker.name, ' avail length ', this.availrunners.length);
|
|
var runner = this.availrunners.pop();
|
|
this.usedrunners++;
|
|
runnerTimeout(runner);
|
|
|
|
return runner;
|
|
}
|
|
|
|
return worker;
|
|
};
|
|
|
|
workers.__workersId = function(argument){
|
|
// create array of all current worker Digital Ocean ID
|
|
return workers.map(function(item){
|
|
return item.id;
|
|
});
|
|
|
|
};
|
|
|
|
workers.destroy = function(worker){
|
|
// todo: If worker is passed, check for it in the workers array and
|
|
// remove it if found.
|
|
|
|
var worker = worker || workers.pop();
|
|
return doapi.dropletDestroy(worker.id, function(body) {
|
|
console.log('Deleted worker', worker.name);
|
|
});
|
|
};
|
|
|
|
workers.destroyByTag = function(tag){
|
|
// Delete works that with
|
|
|
|
tag = tag || tagPrefix + workers.settings.version;
|
|
let currentIDs = workers.__workersId();
|
|
|
|
let deleteDroplets = function(droplets){
|
|
if(droplets.length === 0) return true;
|
|
let droplet = droplets.pop();
|
|
if(~currentIDs.indexOf(droplet.id)) return deleteDroplets(droplets);
|
|
|
|
doapi.dropletDestroy(droplet.id, function(body){
|
|
setTimeout(deleteDroplets, 1000, droplets);
|
|
if(!droplets.length) console.log(`Finished deleting workers tagged ${tag}.`);
|
|
});
|
|
}
|
|
|
|
doapi.dropletsByTag(tag, function(data){
|
|
data = JSON.parse(data);
|
|
console.log(`Deleting ${data['droplets'].length} workers tagged ${tag}. Workers`,
|
|
data['droplets'].map(function(item){
|
|
return item.name+' | '+item.id;
|
|
})
|
|
);
|
|
|
|
deleteDroplets(data['droplets']);
|
|
});
|
|
};
|
|
|
|
workers.startRunners = function(args){
|
|
// console.log('starting runners on', args.worker.name, args.worker.ip)
|
|
|
|
// dont make runners on out dated workers
|
|
if(!args.worker || workers.settings.image > args.worker.image.id){
|
|
console.log(`Blocked outdated worker(${args.worker.image.id}), current image ${workers.settings.image}.`)
|
|
return ;
|
|
}
|
|
|
|
// percent of used RAM to stop runner creation
|
|
args.stopPercent = args.stopPercent || 80;
|
|
args.onStart = args.onStart || function(){};
|
|
args.onDone = args.onDone || function(){};
|
|
|
|
ramPercentUsed(args.worker.ip, function(usedMemPercent){
|
|
if(usedMemPercent > args.stopPercent ){
|
|
console.log('using', String(usedMemPercent).trim(),
|
|
'percent memory, stopping runner creation!', args.worker.availrunners.length,
|
|
'created on ', args.worker.name
|
|
);
|
|
args.onDone(args);
|
|
return ;
|
|
}
|
|
|
|
var name = 'crunner-'+(Math.random()*100).toString().slice(-4);
|
|
// console.log('Free ram check passed!')
|
|
lxc.startEphemeral(name, 'crunner0', args.worker.ip, function(data){
|
|
if(!data.ip) return setTimeout(workers.startRunners, 0, args);
|
|
// console.log('started runner on', args.worker.name)
|
|
|
|
var runner = {
|
|
ip: data.ip,
|
|
name: name,
|
|
worker: args.worker,
|
|
label: args.worker.name + ':' + name
|
|
};
|
|
args.onStart(runner, args);
|
|
|
|
args.worker.availrunners.push(runner);
|
|
|
|
setTimeout(workers.startRunners, 0, args);
|
|
});
|
|
});
|
|
};
|
|
|
|
workers.checkForZombies = function(){
|
|
// check to make sure all works are used or usable.
|
|
|
|
let zombies = 0;
|
|
|
|
for(let worker of workers){
|
|
console.log(`Checking if ${worker.name} is a zombie worker.`);
|
|
// if a runner has no available runners and no used runners, its a
|
|
// zombie. This should happen when a newer image ID has been added
|
|
// and old workers slowly lose there usefulness.
|
|
if(worker.availrunners.length === 0 && worker.usedrunners === 0){
|
|
workers.splice(workers.indexOf(worker), 1);
|
|
console.log(`Zombie! Worker ${worker.name}, destroying.`);
|
|
workers.destroy(worker);
|
|
zombies++;
|
|
}
|
|
}
|
|
|
|
return zombies;
|
|
};
|
|
|
|
workers.checkBalance = function(){
|
|
console.log(`Checking balance.`);
|
|
|
|
workers.checkForZombies();
|
|
|
|
// if there are workers being created, stop scale up and down check
|
|
if(workers.currentCreating+workers.length < workers.settings.min) null;
|
|
else if(workers.currentCreating)
|
|
return console.log(`Killing balance, workers are being created.`);
|
|
|
|
// hold amount of workers with no used runners
|
|
var lastMinAval = 0;
|
|
|
|
// check to make sure the `workers.settings.minAvail` have free runners
|
|
for(let worker of workers.slice(-workers.settings.minAvail)){
|
|
if(worker.usedrunners === 0){
|
|
lastMinAval++;
|
|
}else{
|
|
// no need to keep counting, workers need to be created
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(lastMinAval > workers.settings.minAvail){
|
|
// Remove workers if there are more then the settings states
|
|
console.log(
|
|
`Last ${workers.settings.minAvail} workers not used, killing last worker`,
|
|
'lastMinAval:', lastMinAval,
|
|
'minAvail:', workers.settings.minAvail,
|
|
'workers:', workers.length
|
|
);
|
|
|
|
return workers.destroy();
|
|
|
|
} else if(lastMinAval < workers.settings.minAvail){
|
|
// creates workers if the settings file demands it
|
|
console.log(
|
|
'last 3 workers have no free runners, starting worker',
|
|
'lastMinAval:', lastMinAval,
|
|
'minAvail:', workers.settings.minAvail,
|
|
'workers:', workers.length
|
|
);
|
|
|
|
return workers.create();
|
|
}
|
|
|
|
};
|
|
workers.settingsSave = function(){
|
|
// save the live settings file to disk
|
|
|
|
jsonfile.writeFile('./workers.json', workers.settings, {spaces: 2}, function(err) {
|
|
console.error(err);
|
|
});
|
|
};
|
|
|
|
workers.add = function(newWorkers){
|
|
newWorkers.forEach(function(worker){
|
|
workers.push(worker);
|
|
});
|
|
};
|
|
|
|
// make sure Digital Ocean has a tag for the current worker version
|
|
doapi.tagCreate(tagPrefix+workers.settings.version);
|
|
|
|
return workers;
|
|
|
|
})();
|
|
|
|
var ramPercentUsed = function(ip, callback){
|
|
// checks the percent of ram used on a worker.
|
|
|
|
return lxc.exec(
|
|
"python3 -c \"a=`head /proc/meminfo|grep MemAvail|grep -Po '\\d+'`;t=`head /proc/meminfo|grep MemTotal|grep -Po '\\d+'`;print(round(((t-a)/t)*100, 2))\"",
|
|
ip,
|
|
callback
|
|
);
|
|
};
|
|
|
|
var runnerTimeout = function(runner, time){
|
|
time = time || 60000; // 1 minutes
|
|
|
|
if(runner.hasOwnProperty('timeout')){
|
|
clearTimeout(runner.timeout);
|
|
}
|
|
|
|
return runner.timeout = setTimeout(runnerFree, time, runner);
|
|
};
|
|
|
|
var runnerFree = function(runner){
|
|
lxc.stop(runner.name, runner.worker.ip);
|
|
runner.worker.usedrunners--;
|
|
if(runner.hasOwnProperty('timeout')){
|
|
clearTimeout(runner.timeout);
|
|
}
|
|
delete label2runner[runner.label];
|
|
|
|
console.log(`Runner freed ${runner.label}.`, runner.worker);
|
|
workers.startRunners({worker: runner.worker});
|
|
};
|
|
|
|
var getAvailrunner = function(runner){
|
|
for(let worker of workers){
|
|
if(worker.availrunners.length === 0) continue;
|
|
if(runner && runner.worker.index <= worker.index) break;
|
|
if(runner) runnerFree(runner);
|
|
|
|
return worker.getRunner();
|
|
}
|
|
|
|
if(runner) return runner;
|
|
};
|
|
|
|
var run = function(req, res, runner, count){
|
|
count = count || 0;
|
|
console.log(`Runner starting attempt ${count}.`);
|
|
|
|
if(!runner){
|
|
console.log(`No runner available!`);
|
|
res.status(503);
|
|
return res.json({error: 'No runners, try again soon.'});
|
|
}
|
|
|
|
if(count > 2){
|
|
console.log(`Runner attempt failed, to many requests!`);
|
|
return res.status(400).json({error: 'Runner restarted to many times'});
|
|
}
|
|
|
|
var httpOptions = {
|
|
url: 'http://' + runner.worker.ip,
|
|
headers: {
|
|
Host: runner.name
|
|
},
|
|
body: JSON.stringify({
|
|
code: req.body.code
|
|
})
|
|
};
|
|
|
|
return request.post(httpOptions, function(error, response, body){
|
|
// console.log('runner response:', arguments)
|
|
if(error || response.statusCode !== 200) return run(req, res, getAvailrunner(), ++count);
|
|
body = JSON.parse(body);
|
|
|
|
if(req.query.once){
|
|
res.json(body);
|
|
return runnerFree(runner, 0);
|
|
}
|
|
|
|
label2runner[runner.label] = runner;
|
|
body['ip'] = runner.label;
|
|
body['rname'] = runner.name;
|
|
body['wname'] = runner.worker.name;
|
|
res.json(body);
|
|
|
|
runnerTimeout(runner);
|
|
});
|
|
};
|
|
|
|
console.log('========STARTING===========')
|
|
setInterval(workers.checkBalance, 15000);
|
|
workers.destroyByTag();
|
|
|
|
|
|
router.get('/stop/:name', function(req, res, next){
|
|
return lxc.stop(req.params.name, function(data){
|
|
console.log('stop', arguments);
|
|
if(data){
|
|
return res.json({status: 500, name: req.params.name, message: data});
|
|
}else{
|
|
return res.json({status: 200});
|
|
}
|
|
});
|
|
});
|
|
router.get('/destroyByTag', function(req, res, next) {
|
|
workers.destroyByTag();
|
|
res.send('?');
|
|
});
|
|
|
|
router.post('/updateID', function(req, res, next){
|
|
var newWorkers = {
|
|
workers: [],
|
|
image: req.query.image,
|
|
target: req.query.target || workers.length,
|
|
size: req.query.size || workers.settings.size,
|
|
version: workers.settings.version+1,
|
|
min: req.query.min || workers.settings,
|
|
minAvail: req.query.minAvail || workers.settings
|
|
};
|
|
|
|
doapi.tagCreate(tagPrefix+newWorkers.version);
|
|
workers.destroyByTag(tagPrefix+newWorkers.version);
|
|
|
|
for(var i=0; i<newWorkers.target; i++){
|
|
|
|
doapi.dropletToActive({
|
|
name: 'clw'+newWorkers.version+'-'+(Math.random()*100).toString().slice(-4),
|
|
newWorkers: newWorkers,
|
|
image: newWorkers.image,
|
|
size: newWorkers.size,
|
|
onCreate: function(data, args){
|
|
doapi.dropletSetTag(tagPrefix+args.newWorkers.version, data.droplet.id);
|
|
},
|
|
onActive: function(droplet, args){
|
|
workers.startRunners({
|
|
worker: workers.makeWorkerObj(droplet),
|
|
newWorkers: args.newWorkers,
|
|
onStart: function(runner, args){
|
|
args.newWorkers.workers.push(args.worker);
|
|
console.log('onStart', args.worker.name);
|
|
args.onStart = function(){};
|
|
},
|
|
onDone: function(args){
|
|
console.log('new workers:', args.newWorkers.workers.length);
|
|
doapi.domianAddRecord({
|
|
domain: "codeland.us",
|
|
type: "A",
|
|
name: "*."+args.worker.name+".workers",
|
|
data: args.worker.publicIP
|
|
});
|
|
|
|
if(args.newWorkers.workers.length >= args.newWorkers.target){
|
|
console.log('upgrade complete!')
|
|
workers.settings.image = args.newWorkers.image;
|
|
workers.settings.size = args.newWorkers.size;
|
|
workers.settings.min = args.newWorkers.min;
|
|
workers.settings.minAvail = args.newWorkers.minAvail;
|
|
|
|
workers.forEach(function(worker){
|
|
worker.availrunners.forEach(function(runner){
|
|
lxc.stop(runner.name, runner.worker.ip);
|
|
});
|
|
worker.availrunners = [];
|
|
});
|
|
|
|
workers.add(args.newWorkers.workers);
|
|
workers.settingsSave();
|
|
workers.checkBalance();
|
|
}
|
|
}
|
|
|
|
});
|
|
}
|
|
});
|
|
}
|
|
res.json({status: "maybe?"});
|
|
});
|
|
|
|
router.get('/liststuff', function(req, res, next){
|
|
var obj = util.inspect(workers, {depth: 4});
|
|
res.send(`
|
|
<h1>Workers</h1>
|
|
<pre>${obj}</pre>
|
|
<h1>label2runner</h1>
|
|
<pre>${util.inspect(label2runner)}</pre>
|
|
<h1>DO calls</h1>
|
|
${doapi.calls}
|
|
`);
|
|
});
|
|
|
|
router.get('/ping/:runner', function(req, res, next){
|
|
var runner = label2runner[req.params.runner];
|
|
runnerTimeout(runner);
|
|
res.json({res:''});
|
|
});
|
|
|
|
router.post('/run/:runner?', function (req, res, next){
|
|
console.log(`Request runner route!`);
|
|
var runner = getAvailrunner(label2runner[req.params.runner]);
|
|
return run(req, res, runner);
|
|
});
|
|
|
|
module.exports = router;
|