wmantly/lxc_manager_node
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Merge pull request #16 from wmantly/eagerload

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Eagerload
This commit is contained in:
William Mantly 2016-04-25 17:51:27 -04:00
commit a5afd8469c
1 changed files with 47 additions and 5 deletions
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52
routes/api.js
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@ -7,10 +7,35 @@ var redis = require("redis");
var client = redis.createClient();
var request = require('request');
var lxc = require('../lxc');
var os = require('os');
var spawn = require('child_process').spawn;
var totalMem = os.totalmem();
var timeoutEvents = {};
var ip2name = {};
var availContainers = [];
var usedContainers = [];
var getFreeMem = function(callback){
var prc = spawn('free', ['-b']);
prc.stdout.setEncoding('utf8');
prc.stdout.on('data', function (data) {
var str = data.toString()
var lines = str.split(/\n/g);
for(var i = 0; i < lines.length; i++) {
lines[i] = lines[i].split(/\s+/);
}
var freeMem = Number(lines[2][3]);
return callback(freeMem);
});
prc.on('close', function (code) {
});
};
var lxcTimeout = function(ip, time){
var name = ip2name[ip];
@ -137,14 +162,31 @@ router.post('/run/:ip?', function doRun(req, res, next){
if(found){
return runner(req, res, ip)
}else{
var name = 'crunner-'+(Math.random()*100).toString().replace('.','');
return lxc.startEphemeral(name, 'crunner', function(data){
ip2name[data.ip] = name;
return runner(req, res, data.ip);
});
return runner(req, res, availContainers.pop());
}
});
});
// freeMem: 97700 totalmem 513818624 usedMem: 0
// freeMem: 420,472 totalmem 513,818,624 usedMem: 100
var startAll = function(){
getFreeMem(function(freeMem){
var usedMemPercent = Math.round(( (totalMem-freeMem) /totalMem)*100);
console.log('freeMem:', freeMem, 'totalmem', totalMem, 'usedMemPercent:', usedMemPercent);
if(usedMemPercent < 81 ){
var name = 'crunner-'+(Math.random()*100).toString().replace('.','');
return lxc.startEphemeral(name, 'crunner', function(data){
ip2name[data.ip] = name;
availContainers.push(data.ip);
return startAll();
});
}else{
console.log('using', usedMemPercent, 'percent memory, stopping container creation!', availContainers.length, 'created');
}
});
}
startAll();
module.exports = router;