Upload 2 files

index.js

@@ -0,0 +1,67 @@
+const express = require('express');
+const app = express();
+
+const fs = require('node:fs');
+const os = require("node:os");
+const v8 = require("node:v8");
+const process = require('node:process');
+
+function handle(signal) {
+  console.log(`Received signal ${signal}`);
+}
+
+process.on('SIGINT', handle);
+process.on('SIGTERM', handle);
+
+app.get('/', (req, res) => {
+  console.log('Received a request.');
+
+  const files = [
+      "/sys/fs/cgroup/memory/memory.usage_in_bytes",
+      "/sys/fs/cgroup/memory/memory.limit_in_bytes",
+      "/sys/fs/cgroup/cpu/cpuacct.usage",
+      "/sys/fs/cgroup/cpu/cpu.shares",
+      "/sys/fs/cgroup/cpu/cpu.cfs_quota_us",
+      "/sys/fs/cgroup/cpu/cpu.cfs_period_us",
+      ]
+
+  let cgroup = {};
+  for (let f of files) {
+    try {
+      cgroup[f] = fs.readFileSync(f, 'utf8');
+    } catch(e) {
+      console.error(`Cannot read cgroup info for ${f}`, e);
+    }
+  } 
+
+  let memory = {
+      freemem: os.freemem(),
+      totalmem: os.totalmem(),
+      memoryUsage: process.memoryUsage(),
+  };
+
+  let cpus = os.cpus();
+  let availableParallelism = os.availableParallelism();
+
+  let username = os.userInfo().username
+
+  let product_name;
+  try {
+    product_name = fs.readFileSync('/sys/class/dmi/id/product_name', 'utf8');
+  } catch(e) {
+    console.error(`Cannot read /sys/class/dmi/id/product_name`, e);
+  }
+  
+  let env = process.env;
+
+  let heapinfo = v8.getHeapStatistics();
+
+  let pid = process.pid;
+
+  res.send({cgroup, memory, heapinfo, cpus, username, product_name, env, availableParallelism, pid});
+});
+
+const port = process.env.PORT || 8080;
+app.listen(port, () => {
+  console.log('Hello world listening on port', port);
+});

package.json

@@ -0,0 +1,14 @@
+{
+  "name": "container-info",
+  "version": "1.0.0",
+  "description": "Return some memory, CPU and cgroup info about the current container",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "author": "",
+  "license": "Apache-2.0",
+  "dependencies": {
+    "express": "^4.16.4"
+  }
+}