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Hands on with Kubernetes Workshops

A demo repo for running the Kismatic Enterprise Toolkit on Digital Ocean

The following repository will create you a Kubernetes cluster using the following:

  1. The underlying Infrastructure using Digital Ocean
  2. Infrastructure creation using Terraform
  3. Cluster provisoning using the Kismatic Enterprise Toolkit (KET)

Prerequisities

1. Terraform

Before using this repository you will need to download and install Terraform

This can be downloaded from here

Download and place the Terraform binary in your preferred location, then tweak the command below and execute it:

$ PATH=/usr/local/terraform/bin:<terraform location>:$PATH

2. Digital Ocean account

You will also require an account on https://www.digitalocean.com/

Usage

1. Create Infrastructure

Before executing Terraform you need to obtain your Digital Ocean token here

To see the changes which are going to be made execute the following commands:

$ export TF_VAR_digital_ocean_token=
$ make plan

To apply the changes execute the following commands:

$ export TF_VAR_digital_ocean_token=
$ make apply

2. Provision Kubernetes cluster

To provision the Kubernetes cluster execute the following command:

$ make get-kismatic

Now update the kismatic-cluster.yaml to have the correct IP addresses (make sure you add the IP for master to load_balanced_fqdn and load_balanced_short_name), once you have filled that in execute:

$ make provision-cluster

Note: You can specify which version of KET by updating the KISMATIC_VERSION variable in the Makefile.

3. Deploy the application

To deploy the demo application execute the following command:

$ kubectl --kubeconfig kubeconfig apply -f demo-app

Run

kubectl --kubeconfig kubeconfig get services

You will get something like:

NAME          CLUSTER-IP     EXTERNAL-IP   PORT(S)          AGE
hello-world   128.0.0.1   <nodes>       8080:31684/TCP     5m
kubernetes    128.0.0.1     <none>        443/TCP          8m

Run

kubectl --kubeconfig kubeconfig describe service hello-world

You will get something like:

Name:			hello-world
Namespace:		default
Labels:			<none>
Selector:		app=hello-world
Type:			NodePort
IP:			128.0.0.1
Port:			<unset>	8080/TCP
NodePort:		<unset>	31684/TCP
Endpoints:		128.0.0.1:8080,128.0.0.1:8080
Session Affinity:	None
No events.

Now execute the following command:

$ while true; do curl http://<worker ip>:<node port>; sleep 1; done;