Add collectd for backups

src/backups.js

@@ -30,6 +30,8 @@ exports = module.exports = {
 
     checkConfiguration: checkConfiguration,
 
+    configureCollectd: configureCollectd,
+
     SECRET_PLACEHOLDER: String.fromCharCode(0x25CF).repeat(8),
 
     // for testing
@@ -44,12 +46,14 @@ var addons = require('./addons.js'),
     assert = require('assert'),
     backupdb = require('./backupdb.js'),
     BoxError = require('./boxerror.js'),
+    collectd = require('./collectd.js'),
     constants = require('./constants.js'),
     crypto = require('crypto'),
     database = require('./database.js'),
     DataLayout = require('./datalayout.js'),
     debug = require('debug')('box:backups'),
     df = require('@sindresorhus/df'),
+    ejs = require('ejs'),
     eventlog = require('./eventlog.js'),
     fs = require('fs'),
     locker = require('./locker.js'),
@@ -69,6 +73,7 @@ var addons = require('./addons.js'),
     zlib = require('zlib');
 
 const BACKUP_UPLOAD_CMD = path.join(__dirname, 'scripts/backupupload.js');
+const COLLECTD_CONFIG_EJS = fs.readFileSync(__dirname + '/collectd/cloudron-backup.ejs', { encoding: 'utf8' });
 
 function debugApp(app) {
     assert(typeof app === 'object');
@@ -1302,3 +1307,15 @@ function checkConfiguration(callback) {
         callback(null, message);
     });
 }
+
+function configureCollectd(backupConfig, callback) {
+    assert.strictEqual(typeof backupConfig, 'object');
+    assert.strictEqual(typeof callback, 'function');
+
+    if (backupConfig.provider === 'filesystem') {
+        const collectdConf = ejs.render(COLLECTD_CONFIG_EJS, { backupDir: backupConfig.backupFolder });
+        collectd.addProfile('cloudron-backup', collectdConf, callback);
+    } else {
+        collectd.removeProfile('cloudron-backup', callback);
+    }
+}