367 lines
9.8 KiB
JavaScript
367 lines
9.8 KiB
JavaScript
'use strict';
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var express = require('express');
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var router = express.Router();
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var util = require('util');
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var request = require('request');
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var lxc = require('../lxc');
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var doapi = require('../doapi')();
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var workerSnapID = 'V1'
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// console.log = function(){};
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var label2runner = {};
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var isCheckingWorkers = false;
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var workers = (function(){
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var workers = [];
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workers.currentCreatingMax = 2;
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workers.currentCreating = 0;
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workers.checkDroplet = function(id, time){
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time = time || 10000;
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return doapi.dropletInfo(id, function(data){
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var worker = JSON.parse(data)['droplet'];
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if(worker.status == 'active'){
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// console.log('Droplet is now active, starting runners in 20 seconds');
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return setTimeout(function(worker){
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// console.log('Ready to start runners!');
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workers.startRunners(workers.makeWorkerObj(worker), true);
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workers.currentCreating--;
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}, 20000, worker);
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}else{
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// console.log('Worker not ready, check again in ', time, 'MS');
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return setTimeout(function(){
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workers.checkDroplet(id);
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}, time);
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}
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});
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};
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workers.create = function(){
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if(workers.currentCreating > workers.currentCreatingMax ) return false;
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return doapi.dropletCreate({
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name: 'clw'+workerSnapID+'-'+(Math.random()*100).toString().slice(-4),
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image: '18473675',
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size: '2gb'
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}, function(data){
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data = JSON.parse(data);
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workers.currentCreating++;
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setTimeout(function(dopletNewID){
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return workers.checkDroplet(dopletNewID);
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}, 70000, data.droplet.id);
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return doapi.dropletSetTag('clworker', data.droplet.id, function(){});
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});
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};
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workers.destroy = function(worker){
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var worker = worker || workers.pop();
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return doapi.dropletDestroy(worker.id, function(body) {
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console.log('body of destroy', body)
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});
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};
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workers.makeWorkerObj = function(worker){
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worker.networks.v4.forEach(function(value){
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worker[value.type+'IP'] = value.ip_address;
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});
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worker.availrunners = [];
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worker.ip = worker.privateIP;
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worker.usedrunner = 0;
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worker.index = workers.length,
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worker.getRunner = function(){
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if(this.availrunners.length === 0) return false;
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// console.log('getting runner from ', worker.name, ' avail length ', this.availrunners.length);
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var runner = this.availrunners.pop();
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this.usedrunner++;
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lxcTimeout(runner);
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label2runner[runner.label] = runner;
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return runner;
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}
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return worker;
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};
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workers.__workersId = function(argument){
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return workers.map(function(item){
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return item.id;
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});
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};
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workers.destroyOld = function(){
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var currentIDs = workers.__workersId()
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doapi.dropletsByTag('clworker', function(data){
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data = JSON.parse(data);
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console.log('current worker ids', currentIDs)
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console.log('do droplets', data['droplets'].length, data['droplets'].map(function(item){
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return item.name+'| '+item.id;
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}));
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data['droplets'].forEach(function(worker){
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console.log('checking', worker.name, worker.id)
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if(~currentIDs.indexOf(worker.id)) return false;
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console.log('found old droplet, killing it');
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setTimeout(function(id) {
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// body...
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doapi.dropletDestroy(id, function(body){console.log('delete body', body)});
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}, Math.floor(Math.random() * 9) + 1, worker.id)
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});
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});
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};
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workers.startRunners = function(worker, newWorker, stopPercent){
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// console.log('starting runners on', worker.name, worker.ip)
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stopPercent = stopPercent || 80;
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ramPercentUsed(worker.ip, function(usedMemPercent){
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if(usedMemPercent < stopPercent ){
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var name = 'crunner-'+(Math.random()*100).toString().slice(-4);
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return lxc.startEphemeral(name, 'crunner0', worker.ip, function(data){
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if(!data.ip) return setTimeout(workers.startRunners(worker, newWorker),0);
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// console.log('started runner on', worker.name)
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if(newWorker){
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worker = workers[workers.push(worker)-1];
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doapi.domianAddRecord({
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domain: "codeland.us",
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type: "A",
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name: "*."+worker.name+".workers.codeland.us",
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data: worker.ip
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}, function(){});
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}
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worker.availrunners.push({
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ip: data.ip,
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name: name,
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worker: worker,
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label: worker.name + ':' + name
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});
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return setTimeout(workers.startRunners(worker, false ,stopPercent), 0);
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});
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}else{
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console.log('using', String(usedMemPercent), 'percent memory, stopping runner creation!', worker.availrunners.length, 'created on ', worker.name);
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}
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});
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};
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workers.checkBalance = function(){
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var minWorkers = 1;
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console.log('checking balance');
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if(workers.length < minWorkers){
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console.log('less then 3 workers, starting a droplet');
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for(var i=minWorkers-workers.length; i--;) workers.create();
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return ;
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}
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// if(workers[workers.length-3].usedrunner !== 0 && workers[workers.length-2].usedrunner !== 0 && workers[workers.length-1].usedrunner !== 0){
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// console.log('last 3 workers have no free runners, starting droplet');
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// return workers.create();
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// }
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// if(workers.length > minWorkers && workers[workers.length-3].usedrunner === 0 && workers[workers.length-2].usedrunner === 0 && workers[workers.length-1].usedrunner === 0){
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// console.log('Last 2 runners not used, killing last runner', workers.length);
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// return workers.destroy();
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// }
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// for(let worker of workers){
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// if(worker.length <= 3) break;
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// if(worker.availrunners.length === 0 && worker.usedrunner === 0){
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// console.log('found zombie worker, destroying')
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// workers.destroy(worker);
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// }
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// }
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console.log('stopping workers balancing check');
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};
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return workers;
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})();
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var ramPercentUsed = function(ip, callback){
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return lxc.exec(
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"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))\"",
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ip,
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callback
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);
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};
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var runnerFree = function(runner){
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lxc.stop(runner.name, runner.worker.ip);
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runner.worker.usedrunner--;
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if(runner.hasOwnProperty('timeout')){
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clearTimeout(runner.timeout);
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}
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delete label2runner[runner.label];
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workers.startRunners(runner.worker);
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};
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var lxcTimeout = function(runner, time){
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time = time || 60000; // 1 minutes
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if(runner.hasOwnProperty('timeout')){
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clearTimeout(runner.timeout);
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}
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return runner.timeout = setTimeout(function(){
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runnerFree(runner);
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}, time);
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};
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var getAvailrunner = function(runner){
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for(let worker of workers){
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if(worker.availrunners.length === 0) continue;
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if(runner && runner.worker.index <= worker.index) break;
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if(runner) runnerFree(runner);
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return worker.getRunner();
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}
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if(runner) return runner;
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return null;
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};
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var run = function(req, res, runner, count){
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count = count || 0;
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console.log('run start', count);
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if(!runner){
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console.log('no runner');
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res.status(503);
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return res.json({error: 'No runners, try again soon.'});
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}
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if(count > 3){
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console.log('to many reties on runner');
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res.status(400);
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return res.json({error: 'Runner restarted to many times'});
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}
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var httpOptions = {
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url: 'http://' + runner.worker.ip,
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headers: {
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Host: runner.name
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},
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body: JSON.stringify({
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code: req.body.code
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})
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};
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return request.post(httpOptions, function(error, response, body){
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// console.log('runner response:', arguments)
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if(error || response.statusCode !== 200) return run(req, res, getAvailrunner(), ++count);
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body = JSON.parse(body);
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body['ip'] = runner.label;
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lxcTimeout(runner);
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return res.json(body);
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});
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};
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setTimeout(function(){
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// console.log('Starting balance checking in 30 seconds')
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setInterval(workers.checkBalance, 15000);
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}, 180000);
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setInterval(function(argument) {
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workers.destroyOld();
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}, 3600000); // 1 hour
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workers.destroyOld();
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workers.checkBalance();
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// router.get('/start/:name', function(req, res, next){
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// return lxc.start(req.params.name, function(data){
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// if(!data){
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// return res.json({
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// status: 500,
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// name: req.params.name,
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// message: data
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// });
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// }else{
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// res.json({});
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// }
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// });
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// });
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// router.get('/live/:template/:name', function(req, res, next){
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// return lxc.startEphemeral(req.params.name, req.params.template, function (data) {
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// console.log('live', arguments);
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// return res.json(data);
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// });
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// });
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// router.get('/clone/:template/:name', function(req, res, next){
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// return lxc.clone(req.params.name, req.params.template, function(data){
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// console.log('clone', arguments);
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// if( data.match(/Created runner/) ){
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// return res.json({status: 200});
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// }else{
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// return res.json({status: 500, message: data});
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// }
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// });
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// });
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// router.get('/destroy/:name', function(req, res, next){
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// return lxc.destroy(req.params.name, function(data){
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// console.log('destroy', arguments);
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// if(data){
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// return res.json({status: 500, message: data});
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// }else{
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// return res.json({status: 200});
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// }
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// });
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// });
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// router.get('/info/:name', function(req, res, next){
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// return lxc.info(req.params.name, function(data){
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// return res.json(data);
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// });
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// });
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// router.get('/list', function(req, res, next) {
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// return lxc.list(workers.clworker0.ip, function(data){
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// return res.json(data);
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// });
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// });
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router.get('/stop/:name', function(req, res, next){
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return lxc.stop(req.params.name, function(data){
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console.log('stop', arguments);
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if(data){
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return res.json({status: 500, name: req.params.name, message: data});
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}else{
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return res.json({status: 200});
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}
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});
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});
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router.get('/destroyOld', function(req, res, next) {
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workers.destroyOld();
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res.send('?');
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});
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router.get('/liststuff', function(req, res, next){
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var obj = util.inspect(workers, {depth: 4});
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res.send("<h1>Workers</h1><pre>"+obj+"</pre><h1>label2runner</h1><pre>"+util.inspect(label2runner)+'</pre><h1>DO calls</h1>'+doapi.calls);
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});
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router.post('/run/:ip?', function doRun(req, res, next){
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console.log('hit runner route');
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var runner = getAvailrunner(label2runner[req.params.ip]);
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return run(req, res, runner);
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});
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module.exports = router;
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