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moved workers definition to seperate file.

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This commit is contained in:
Thomas Harvey 2017-10-09 16:46:56 -04:00
parent 81c14dbc80
commit 2c92d0f232
2 changed files with 276 additions and 263 deletions
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264
routes/api.js
View File

@ -15,269 +15,7 @@ var label2runner = {};
// //
var tagPrefix = settings.tagPrefix || 'clwV'; var tagPrefix = settings.tagPrefix || 'clwV';
var workers = (function(){ var workers = require('./workers_manager.js');
// 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){ var ramPercentUsed = function(ip, callback){
// checks the percent of ram used on a worker. // checks the percent of ram used on a worker.

275
routes/workers_manager.js Normal file
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@ -0,0 +1,275 @@
'use strict';
var jsonfile = require('jsonfile');
var lxc = require('../lxc');
var doapi = require('../doapi')();
var settings = require('./workers.json');
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;
})();
module.exports = workers;