Nginx (pronounced “engine-x”) is an open source reverse proxy server for HTTP, HTTPS, SMTP, POP3, and IMAP protocols, as well as a load balancer, HTTP cache, and a web server (origin server). The nginx project started with a strong focus on high concurrency, high performance and low memory usage. It is licensed under the 2-clause BSD-like license and it runs on Linux, BSD variants, Mac OS X, Solaris, AIX, HP-UX, as well as on other *nix flavors. It also has a proof of concept port for Microsoft Windows.
In my last blog post, I showcased how to build 5-Node Kubernetes cluster. Under this blog post, we will see how to build our first Nginx application on this cluster environment.
Verifying 5-Node K8s Cluster
[node1 ~]$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
node1 Ready master 1h v1.10.2
node2 Ready <none> 1h v1.10.2
node3 Ready <none> 1h v1.10.2
node4 Ready <none> 1h v1.10.2
node5 Ready <none> 14m v1.10.2
[node1 ~]$
Running Nginx having 4 Replicas
kubectl run nginx --image=nginx:latest --replicas=4
Verifying K8s Pods Up and Running
[node1 ~]$ kubectl get po
NAME READY STATUS RESTARTS AGE
nginx-5db977d67c-6sdfd 1/1 Running 0 2m
nginx-5db977d67c-jfq9h 1/1 Running 0 2m
nginx-5db977d67c-vs925 1/1 Running 0 2m
nginx-5db977d67c-z5r45 1/1 Running 0 2m
[node1 ~]$
Watch the pods
kubectl get pods -w
Expose the NGINX API port:
kubectl expose deploy/nginx --port 80
Testing the Nginx Service
IP=$(kubectl get svc nginx -o go-template --template '{{ .spec.clusterIP }}')
Send a few requests:
[node1 ~]$ curl $IP:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
[node1 ~]$In my next blog post, I will showcase how to build Istio Application on Play with Kubernetes Platform.
Kubernetes Hands-on Lab #3 – Deploy Istio Mesh on K8s Cluster
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