Show Nodejs heap stats only at Standalone WeKan.

Not shown at Sandstorm WeKan, because there's a bunch of machine performance data
Sandstorm doesn't expose to apps to prevent side channel attacks.

Thanks to ocdtrekkie and xet7 !

Fixes #4154

client/components/settings/informationBody.jade

@@ -65,48 +65,49 @@ template(name='statistics')
         tr
           th {{_ 'OS_Cpus'}}
           td {{statistics.os.cpus.length}}
-        tr
-          th {{_ 'Node_heap_total_heap_size'}}
-          td {{bytesToSize statistics.nodeHeapStats.totalHeapSize}}
-        tr
-          th {{_ 'Node_heap_total_heap_size_executable'}}
-          td {{bytesToSize statistics.nodeHeapStats.totalHeapSizeExecutable}}
-        tr
-          th {{_ 'Node_heap_total_physical_size'}}
-          td {{bytesToSize statistics.nodeHeapStats.totalPhysicalSize}}
-        tr
-          th {{_ 'Node_heap_total_available_size'}}
-          td {{bytesToSize statistics.nodeHeapStats.totalAvailableSize}}
-        tr
-          th {{_ 'Node_heap_used_heap_size'}}
-          td {{bytesToSize statistics.nodeHeapStats.usedHeapSize}}
-        tr
-          th {{_ 'Node_heap_heap_size_limit'}}
-          td {{bytesToSize statistics.nodeHeapStats.heapSizeLimit}}
-        tr
-          th {{_ 'Node_heap_malloced_memory'}}
-          td {{bytesToSize statistics.nodeHeapStats.mallocedMemory}}
-        tr
-          th {{_ 'Node_heap_peak_malloced_memory'}}
-          td {{bytesToSize statistics.nodeHeapStats.peakMallocedMemory}}
-        tr
-          th {{_ 'Node_heap_does_zap_garbage'}}
-          td {{statistics.nodeHeapStats.doesZapGarbage}}
-        tr
-          th {{_ 'Node_heap_number_of_native_contexts'}}
-          td {{statistics.nodeHeapStats.numberOfNativeContexts}}
-        tr
-          th {{_ 'Node_heap_number_of_detached_contexts'}}
-          td {{statistics.nodeHeapStats.numberOfDetachedContexts}}
-        tr
-          th {{_ 'Node_memory_usage_rss'}}
-          td {{bytesToSize statistics.nodeMemoryUsage.rss}}
-        tr
-          th {{_ 'Node_memory_usage_heap_total'}}
-          td {{bytesToSize statistics.nodeMemoryUsage.heapTotal}}
-        tr
-          th {{_ 'Node_memory_usage_heap_used'}}
-          td {{bytesToSize statistics.nodeMemoryUsage.heapUsed}}
-        tr
-          th {{_ 'Node_memory_usage_external'}}
-          td {{bytesToSize statistics.nodeMemoryUsage.external}}
+        unless isSandstorm
+          tr
+            th {{_ 'Node_heap_total_heap_size'}}
+            td {{bytesToSize statistics.nodeHeapStats.totalHeapSize}}
+          tr
+            th {{_ 'Node_heap_total_heap_size_executable'}}
+            td {{bytesToSize statistics.nodeHeapStats.totalHeapSizeExecutable}}
+          tr
+            th {{_ 'Node_heap_total_physical_size'}}
+            td {{bytesToSize statistics.nodeHeapStats.totalPhysicalSize}}
+          tr
+            th {{_ 'Node_heap_total_available_size'}}
+            td {{bytesToSize statistics.nodeHeapStats.totalAvailableSize}}
+          tr
+            th {{_ 'Node_heap_used_heap_size'}}
+            td {{bytesToSize statistics.nodeHeapStats.usedHeapSize}}
+          tr
+            th {{_ 'Node_heap_heap_size_limit'}}
+            td {{bytesToSize statistics.nodeHeapStats.heapSizeLimit}}
+          tr
+            th {{_ 'Node_heap_malloced_memory'}}
+            td {{bytesToSize statistics.nodeHeapStats.mallocedMemory}}
+          tr
+            th {{_ 'Node_heap_peak_malloced_memory'}}
+            td {{bytesToSize statistics.nodeHeapStats.peakMallocedMemory}}
+          tr
+            th {{_ 'Node_heap_does_zap_garbage'}}
+            td {{statistics.nodeHeapStats.doesZapGarbage}}
+          tr
+            th {{_ 'Node_heap_number_of_native_contexts'}}
+            td {{statistics.nodeHeapStats.numberOfNativeContexts}}
+          tr
+            th {{_ 'Node_heap_number_of_detached_contexts'}}
+            td {{statistics.nodeHeapStats.numberOfDetachedContexts}}
+          tr
+            th {{_ 'Node_memory_usage_rss'}}
+            td {{bytesToSize statistics.nodeMemoryUsage.rss}}
+          tr
+            th {{_ 'Node_memory_usage_heap_total'}}
+            td {{bytesToSize statistics.nodeMemoryUsage.heapTotal}}
+          tr
+            th {{_ 'Node_memory_usage_heap_used'}}
+            td {{bytesToSize statistics.nodeMemoryUsage.heapUsed}}
+          tr
+            th {{_ 'Node_memory_usage_external'}}
+            td {{bytesToSize statistics.nodeMemoryUsage.external}}

server/statistics.js

@@ -1,5 +1,10 @@
 import { MongoInternals } from 'meteor/mongo';
 
+// Sandstorm context is detected using the METEOR_SETTINGS environment variable
+// in the package definition.
+const isSandstorm =
+  Meteor.settings && Meteor.settings.public && Meteor.settings.public.sandstorm;
+
 if (Meteor.isServer) {
   Meteor.methods({
     getStatistics() {
@@ -28,27 +33,35 @@ if (Meteor.isServer) {
           pid: process.pid,
           uptime: process.uptime(),
         };
-        const v8 = require('v8'); // Import the v8 module
-        statistics.nodeHeapStats = {
-          totalHeapSize: v8.getHeapStatistics().total_heap_size,
-          totalHeapSizeExecutable: v8.getHeapStatistics().total_heap_size_executable,
-          totalPhysicalSize: v8.getHeapStatistics().total_physical_size,
-          totalAvailableSize: v8.getHeapStatistics().total_available_size,
-          usedHeapSize: v8.getHeapStatistics().used_heap_size,
-          heapSizeLimit: v8.getHeapStatistics().heap_size_limit,
-          mallocedMemory: v8.getHeapStatistics().malloced_memory,
-          peakMallocedMemory: v8.getHeapStatistics().peak_malloced_memory,
-          doesZapGarbage: v8.getHeapStatistics().does_zap_garbage,
-          numberOfNativeContexts: v8.getHeapStatistics().number_of_native_contexts,
-          numberOfDetachedContexts: v8.getHeapStatistics().number_of_detached_contexts,
-        };
-        let memoryUsage = process.memoryUsage();
-        statistics.nodeMemoryUsage = {
-          rss: memoryUsage.rss,
-          heapTotal: memoryUsage.heapTotal,
-          heapUsed: memoryUsage.heapUsed,
-          external: memoryUsage.external,
-        };
+        // Start: Show Nodejs heap stats at Standalone WeKan.
+        //
+        // Not shown at Sandstorm WeKan, because there's a bunch of machine performance data
+        // Sandstorm doesn't expose to apps to prevent side channel attacks.
+        if (!isSandstorm) {
+          const v8 = require('v8'); // Import the v8 module
+          statistics.nodeHeapStats = {
+            totalHeapSize: v8.getHeapStatistics().total_heap_size,
+            totalHeapSizeExecutable: v8.getHeapStatistics().total_heap_size_executable,
+            totalPhysicalSize: v8.getHeapStatistics().total_physical_size,
+            totalAvailableSize: v8.getHeapStatistics().total_available_size,
+            usedHeapSize: v8.getHeapStatistics().used_heap_size,
+            heapSizeLimit: v8.getHeapStatistics().heap_size_limit,
+            mallocedMemory: v8.getHeapStatistics().malloced_memory,
+            peakMallocedMemory: v8.getHeapStatistics().peak_malloced_memory,
+            doesZapGarbage: v8.getHeapStatistics().does_zap_garbage,
+            numberOfNativeContexts: v8.getHeapStatistics().number_of_native_contexts,
+            numberOfDetachedContexts: v8.getHeapStatistics().number_of_detached_contexts,
+          };
+          let memoryUsage = process.memoryUsage();
+          statistics.nodeMemoryUsage = {
+            rss: memoryUsage.rss,
+            heapTotal: memoryUsage.heapTotal,
+            heapUsed: memoryUsage.heapUsed,
+            external: memoryUsage.external,
+          };
+        }
+        // End: Show Nodejs heap stats at Standalone WeKan.
+        //
         // Remove beginning of Meteor release text METEOR@
         let meteorVersion = Meteor.release;
         meteorVersion = meteorVersion.replace('METEOR@', '');