Added more on liveness probe

Signed-off-by: knrt10 <[email protected]>

Author: knrt10

1.docker/readme.md

@@ -1,10 +1,10 @@
 const http = require('http');
 const os = require('os');
 console.log("Kubia server starting...");
-var handler = function (request, response) {
+let handler = function (request, response) {
   console.log("Received request from " + request.connection.remoteAddress);
   response.writeHead(200);
   response.end("You've hit " + os.hostname() + "\n");
 };
-var www = http.createServer(handler);
+let www = http.createServer(handler);
 www.listen(8080);

app.js

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: pod
+metadata:
+  name: kubia-liveness
+spec:
+  containers:
+  - image: knrt10/kubia-unhealthy
+    name: kubia
+    livenessProbe:
+      httpGet:
+        path: /
+        port: 8080

kubia-liveness-probe.yaml

@@ -0,0 +1,5 @@
+FROM node:8
+
+ADD app.js /app.js
+
+ENTRYPOINT [ "node", "app.js" ]

kubia-unhealthy/Dockerfile

@@ -0,0 +1,21 @@
+const http = require('http');
+const os = require('os');
+
+console.log("Kubia server starting...");
+
+let requestCount = 0;
+
+let handler = function(request, response) {
+  console.log("Received request from " + request.connection.remoteAddress);
+  requestCount++;
+  if (requestCount > 5) {
+    response.writeHead(500);
+    response.end("I'm not well. Please restart me!");
+    return;
+  }
+  response.writeHead(200);
+  response.end("You've hit " + os.hostname() + "\n");
+};
+
+let www = http.createServer(handler);
+www.listen(8080);

kubia-unhealthy/app.js

@@ -0,0 +1,20 @@
+{
+  "name": "kubernetes-basiclearning",
+  "version": "1.0.0",
+  "description": "Understand kubernetes step by step.",
+  "main": "app.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+		"start": "node app.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/knrt10/kubernetes-basicLearning.git"
+  },
+  "author": "knrt10",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/knrt10/kubernetes-basicLearning/issues"
+  },
+  "homepage": "https://github.com/knrt10/kubernetes-basicLearning#readme"
+}