reworked nbr of open files

Author: Aymeric Lavit d'Hautefort

README.md

@@ -12,8 +12,14 @@ PM2 module to automatically monitor vital signs of your server :
 * Free and used memory space
 * Operating System
 * All processes running
+* TTY/SSH opened
+* Total opened files
 * Network speed (input and output)
 
+##Requirements
+
+This pm2 module currently uses `ifconfig` to get network status on linux machines, usually installed by default. If not, install with `sudo apt-get install net-tools`.
+
 # pm2-server-monit
 
 ## Install
@@ -24,6 +30,18 @@ $ npm install pm2 -g
 $ pm2 install pm2-server-monit
 ```
 
+##Configuration
+
+Default settings:
+
+* `drive` is `/`
+
+To modify the config values you can use Keymetrics dashboard or the following commands:
+
+```bash
+pm2 set pm2-server-monit:drive /
+```
+
 ## Uninstall
 
 ```bash

app.js

@@ -10,7 +10,7 @@ var users   = require('./lib/users.js');
 var netstat = require('./lib/netstat.js');
 var proc    = require('./lib/proc');
 var actions = require('./lib/actions.js');
-var lsof    = require('./lib/lsof.js');
+var lsof    = require('./lib/openfiles.js');
 
 pmx.initModule({
   widget : {

lib/actions.js

@@ -62,6 +62,13 @@ function initActions() {
       return reply(result);
     });
   });
+
+  pmx.action('ifconfig', function(reply) {
+    var open_ports = shelljs.exec('ifconfig', { async : true, silent : true }, function(err, out) {
+      var result = out.replace(/\n/g, "<br />");
+      return reply(result);
+    });
+  });
 }
 
 module.exports.initActions = initActions;

lib/drive.js

@@ -9,8 +9,8 @@ var diskPattern = /^(\S+)\n?\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(.+?)\n/mg;
 function refreshMetrics(conf) {
   shelljs.exec('df -k', { async : true, silent : true }, function(err, out) {
 
-    if (err || (typeof(out) === 'undefined')) {
-      return pmx.notify('Fail: could not retrieve hard drive metrics', err);
+    if (err || !out || (typeof(out) === 'undefined')) {
+      return pmx.notify('Fail: could not retrieve hard drive metrics');
     }
 
     var total = 0;
@@ -24,7 +24,7 @@ function refreshMetrics(conf) {
         var disk_info = lines[i];
     }
 
-    if (typeof(disk_info) == 'undefined') {
+    if (typeof(disk_info) === 'undefined') {
       return pmx.notify('disk name invalid');
     }
 

lib/netstat.js

@@ -26,7 +26,6 @@ function startNetstat() {
         });
       }
 
-      console.log(stats.interface);
       if (metrics[stats.interface]) {
         metrics[stats.interface]['output'].set(((stats.outputBytes)/1048576).toFixed(2) + 'MB/s');
         metrics[stats.interface]['input'].set(((stats.inputBytes)/1048576).toFixed(2) + 'MB/s');
@@ -37,7 +36,7 @@ function startNetstat() {
         if (i == (Object.keys(metrics).length - 1)) {
           metrics.total.input.set(totalIn.toFixed(2) + 'MB/S');
           metrics.total.output.set(totalOut.toFixed(2) + 'MB/s');
-          console.log(totalIn.toFixed(2) + 'MB/S');
+          
           i = 0;
           totalIn = 0;
           totalOut = 0;

lib/lsof.js renamed to lib/openfiles.js

@@ -6,12 +6,12 @@ var metrics = {};
 var REFRESH_RATE = 30000;
 
 function refreshMetrics() {
-  shelljs.exec('lsof -i -n -P | wc -l', { async : true, silent : true }, function(err, out) {
+  shelljs.exec('cat /proc/sys/fs/file-nr', { async : true, silent : true }, function(err, out) {
     if (err) {
       return pmx.notify('Fail: could not retrieve lsof metrics', err);
     }
-    var result = out.replace(/\n/g, "");
-    result = parseInt(result) - 1;
+    var result = out.replace(/\n/g, "").split(' ')[0];
+    result = parseInt(result);
     metrics.lsof.set(result);
   });
 }
@@ -25,6 +25,7 @@ function initMetrics() {
 
 function init() {
   initMetrics();
+  
   refreshMetrics();
   setInterval(refreshMetrics.bind(this), REFRESH_RATE);
 }