In the last article, we discuss how to use environmental variables in Kubernetes definition files. Now, we will see how to use a separate configuration file to manage environmental data. ConfigMaps are used to store these environmental configuration data in Kubernetes. It is a file in the form of key value pair. After configuring the configMap, you need to inject it into the pod definition in Kubernetes. So, the configuration data in the configMap file will be available as environmental variables in the application hosted inside the container in the pod.

Below is a code snippet copied from the previous…

When running applications in your own data centers you need to have proper disaster recovery techniques. Having a duplicate second datacenter is one method for disaster recovery. But when working enterprise-level, maintaining a second datacenter cost a lot.

AWS provides a cost-effective solution for this issue. AWS has large datacenter groups named “Region”. An AWS region is build to be closest to the business traffic demand. Each region is connected with high-speed fiber networks controlled by AWS.

Every region is isolated from each other. In other terms, no data can go in or out from the datacenter unless granting permission for data to be moved. …

Let’s start with an example. You have a system with two services as worker and master. The worker sends messages to the master. The system works fine. Suddenly the master becomes unavailable to receive the messages from the worker. So, when the worker sends messages it waits for the master to show up, but as it is not available the worker start dropping the messages.

This happens because the master and worker have a tightly coupled architecture. A tightly coupled architecture means whenever one of the services fails, the entire system breaks down.

First, you go to the link https://aws.amazon.com/console/ and create an AWS account. If you already have an account you can log in to the console.

What is AWS EC2?

In this tutorial, I will be covering;

• What is AWS?
• Why AWS?
• How to use AWS?

What is AWS?

Using on-premises servers, storage, machines including installing, maintaining, recovery managing. It costs too much. But when using a cloud service, the cloud service providers provide all the services need to deploy the applications. You can choose cloud services as per your need and pay only for what you use.

AWS is one of the biggest cloud service providers. It maintains internet-connected hardware, so you can provision and use what you want.

There are different methods of deployment methods.

1. On-premises — Using all the local resources. …

Every year there were two sessions in DevFest as, workshop day and the session day. Usually, the workshop day consists of a few workshops including Google Cloud, Machine Learning and many other interesting topics. So, the participants could attend to what they really interest to.

But this year breaking the tradition, the event was hosted virtually for the very first time. DevFest Sri Lanka 2020 began on 16th October following a keynote and sessions on GCP, Knative, ML and more topics. At the end of the sessions, the ultimate #CloudKasthiram was announced.

Link for DevFest Sri Lanka 2020: GDG DevFest…

In a Kubernetes pod definition, use env property to set the environmental variable. env property is an array. So, when you define the variable, use — to separate variables.

env:
  - name:
    value:

The env property is a child property of the container property. That means the environment variables are defined under containers property. Each variable has a name and a value which are respectively going under name and value properties as mentioned in the above syntax.

Now let’s see how the final pod definition looks like.

apiVersion: v1
kind: Pod
metadata:
  name: sample-pod
spec:
  containers:
    - name: ubuntu-container
      image: ubuntu
      env:
        - name: JAVA_HOME
          value…