initial release

Custom-HTTP-Probe/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "sample-app",
+  "version": "0.0.1",
+  "description": "An sample app that can sometimes fail...",
+  "main": "server.js",
+  "scripts": {},
+  "author": "Nicolas MASSE",
+  "repository": "https://github.com/nmasse-itix/OpenShift-Examples.git",
+  "license": "MIT",
+  "dependencies": {
+    "express": "latest"
+  }
+}

Custom-HTTP-Probe/server.js

@@ -0,0 +1,110 @@
+var express = require("express");
+var app = express();
+var router = express.Router();
+var port = 8080;
+
+var alive = true;
+var countdown = 30;
+
+// This is our access_log
+router.use(function (req,res,next) {
+  next();
+  console.log("[%s] %s %s => %i", new Date().toUTCString(), req.method, req.originalUrl, res.statusCode);
+});
+
+function getState() {
+    var response = {
+        "ready": countdown <= 0, 
+        "alive": alive,
+        "pod": process.env["HOSTNAME"]
+    };
+
+    if (countdown > 0) {
+        response.countdown = countdown;
+    }
+
+    return response;
+}
+
+function doCountdown() {
+    if (countdown > 0) {
+        countdown--;
+        setTimeout(doCountdown, 1000);
+    }
+}
+// Countdown before announcing our readiness
+doCountdown();
+
+// Help message
+router.get("/",function(req,res){
+    var response = {
+        paths: {
+            '/please-die': 'This app will die very soon !',
+            '/please-resuscitate': 'This app will come back to life !',
+            '/': 'This message',
+            '/probe/readiness': 'Standard readiness probe',
+            '/probe/liveness': 'Standard liveness probe',
+            '/probe/custom': 'A strange custom probe...'
+        }, 
+        state: getState()
+    }
+    res.type('application/json')
+        .send(JSON.stringify(response))
+        .end();
+});
+
+router.get("/please-die",function(req,res){
+    alive = false;
+    var response = getState();
+    res.type('application/json')
+       .send(JSON.stringify(response))
+       .end();
+});
+
+router.get("/please-resuscitate",function(req,res){
+    alive = true;
+    var response = getState();
+    res.type('application/json')
+       .send(JSON.stringify(response))
+       .end();
+});
+
+router.get("/probe/readiness",function(req,res){
+    var response = getState();
+    res.type('application/json')
+       .status(countdown <= 0 ? 200 : 503)
+       .send(JSON.stringify(response))
+       .end();
+});
+
+router.get("/probe/liveness",function(req,res){
+    var response = getState();
+    res.type('application/json')
+       .status(alive ? 200 : 500)
+       .send(JSON.stringify(response))
+       .end();
+});
+
+router.get("/probe/custom",function(req,res){
+    if (alive) {
+        res.type('application/json')
+           .status(418)
+           .send(JSON.stringify(getState()))
+           .end();
+    } else {
+        res.type('text/html')
+           .status(500)
+           .send("<h1>I'm dead... X-)</h1>")
+           .end();
+    }
+});
+  
+app.use("/",router);
+
+app.use("*",function(req,res){
+  res.status(404).send("Not found");
+});
+
+app.listen(port,function(){
+  console.log("Live at Port %i", port);
+});