From 999b71aa6cc800e7da38b98a0214dd0471491e54 Mon Sep 17 00:00:00 2001
From: ruflin <spam@ruflin.com>
Date: Wed, 11 Jan 2017 21:46:08 +0100
Subject: [PATCH] Add node stats page

This adds an api page under `/api/_node` which provides the basic status information about the running Kibana node.

**Example Event**

An event exposed by the `/api/_node` looks as following:

```
{
   "name":"ruflin",
   "version":"6.0.0-alpha1",
   "build":{
      "num":8467,
      "sha":"6cb7fec4e154faa0a4a3fee4b33dfef91b9870d9"
   },
   "uuid":"5b2de169-2785-441b-ae8c-186a1936b17d",
   "heap":{
      "total":125079552,
      "used":87140680,
      "rss":150970368
   },
   "connections":0,
   "requests":{
      "total":2,
      "disconnects":0,
      "statusCodes":{
         "200":2
      }
   }
}
```
---
 src/server/status/index.js   | 20 ++++++++++++++++++++
 src/server/status/metrics.js | 13 +++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/server/status/index.js b/src/server/status/index.js
index 90dea44ce5378..74da51100ae96 100644
--- a/src/server/status/index.js
+++ b/src/server/status/index.js
@@ -28,6 +28,26 @@ export default function (kbnServer, server, config) {
     }
   }));
 
+  // Outputs the status object under /api/_node
+  server.route(wrapAuth({
+    method: 'GET',
+    path: '/api/_node',
+    handler: function (request, reply) {
+      return reply({
+        name: config.get('server.name'),
+        version: config.get('pkg.version'),
+        build: {
+          num: config.get('pkg.buildNum'),
+          sha: config.get('pkg.buildSha'),
+        },
+        uuid: config.get('server.uuid'),
+        heap: kbnServer.stats.heap,
+        connections: kbnServer.stats.connections,
+        requests: kbnServer.stats.requests,
+      });
+    }
+  }));
+
   server.decorate('reply', 'renderStatusPage', async function () {
     const app = kbnServer.uiExports.getHiddenApp('status_page');
     const response = await getResponse(this);
diff --git a/src/server/status/metrics.js b/src/server/status/metrics.js
index d00a8eb540d04..c054d4396d0c3 100644
--- a/src/server/status/metrics.js
+++ b/src/server/status/metrics.js
@@ -1,9 +1,11 @@
 import _ from 'lodash';
 import Samples from './samples';
+
 module.exports = function (kbnServer, server, config) {
   let lastReport = Date.now();
 
   kbnServer.metrics = new Samples(12);
+  kbnServer.stats = {};
 
   server.plugins['even-better'].monitor.on('ops', function (event) {
     const now = Date.now();
@@ -23,5 +25,16 @@ module.exports = function (kbnServer, server, config) {
       requestsPerSecond: requestsPerSecond
     });
 
+    // Creates a status object for this node
+    kbnServer.stats = {
+      heap: {
+        total: _.get(event, 'psmem.heapTotal'),
+        used: _.get(event, 'psmem.heapUsed'),
+        rss: _.get(event, 'psmem.rss'),
+      },
+      connections: _.get(event, ['concurrents', port]),
+      requests: _.get(event, ['requests', port]),
+    };
   });
 };
+