return swap information

src/disks.js

@@ -2,7 +2,8 @@
 
 exports = module.exports = {
     getDisks: getDisks,
-    checkDiskSpace: checkDiskSpace
+    checkDiskSpace: checkDiskSpace,
+    getMemory: getMemory
 };
 
 const apps = require('./apps.js'),
@@ -13,7 +14,9 @@ const apps = require('./apps.js'),
     df = require('@sindresorhus/df'),
     docker = require('./docker.js'),
     notifications = require('./notifications.js'),
-    paths = require('./paths.js');
+    os = require('os'),
+    paths = require('./paths.js'),
+    safe = require('safetydance');
 
 function getDisks(callback) {
     assert.strictEqual(typeof callback, 'function');
@@ -94,3 +97,15 @@ function checkDiskSpace(callback) {
         notifications.alert(notifications.ALERT_DISK_SPACE, 'Server is running out of disk space', oos ? JSON.stringify(disks.disks, null, 4) : '', callback);
     });
 }
+
+function getMemory(callback) {
+    assert.strictEqual(typeof callback, 'function');
+
+    const stdout = safe.child_process.execSync('swapon --noheadings --raw --bytes --show=SIZE', { encoding: 'utf8' });
+    const swap = !stdout ? 0 : stdout.split('\n').reduce((acc, cur) => acc + (parseInt(cur, 0) || 0));
+
+    callback(null, {
+        memory: os.totalmem(),
+        swap: swap
+    });
+}

src/routes/cloudron.js

@@ -5,6 +5,7 @@ exports = module.exports = {
     isRebootRequired: isRebootRequired,
     getConfig: getConfig,
     getDisks: getDisks,
+    getMemory: getMemory,
     getUpdateInfo: getUpdateInfo,
     update: update,
     checkForUpdates: checkForUpdates,
@@ -62,6 +63,14 @@ function getDisks(req, res, next) {
     });
 }
 
+function getMemory(req, res, next) {
+    disks.getMemory(function (error, result) {
+        if (error) return next(BoxError.toHttpError(error));
+
+        next(new HttpSuccess(200, result));
+    });
+}
+
 function update(req, res, next) {
     if ('skipBackup' in req.body && typeof req.body.skipBackup !== 'boolean') return next(new HttpError(400, 'skipBackup must be a boolean'));
 

src/server.js

@@ -144,6 +144,7 @@ function initializeExpressSync() {
     router.post('/api/v1/cloudron/reboot', cloudronScope, routes.cloudron.reboot);
     router.get ('/api/v1/cloudron/graphs', cloudronScope, routes.graphs.getGraphs);
     router.get ('/api/v1/cloudron/disks', cloudronScope, routes.cloudron.getDisks);
+    router.get ('/api/v1/cloudron/memory', cloudronScope, routes.cloudron.getMemory);
     router.get ('/api/v1/cloudron/logs/:unit', cloudronScope, routes.cloudron.getLogs);
     router.get ('/api/v1/cloudron/logstream/:unit', cloudronScope, routes.cloudron.getLogStream);
     router.get ('/api/v1/cloudron/eventlog', cloudronScope, routes.eventlog.list);