blogs Archives - Page 6 of 8 - DEVOPS DONE RIGHT.

Introducing OpsTree Tomcat Image

Docker is a platform for developers and sysadmins to develop, deploy, and run applications with containers. And, as we all know Docker image is a read-only template that contains a set of instructions for creating a container that wraps up the software and its dependencies into a standardized unit for software development to run on the Docker platform.

In this post, we are going to step through describing some of the best practices and common pitfalls we encountered while developing our first Dockerfile for Tomcat.

AWS Elastic Network Interface

Networking plays an important role in connecting the components of infrastructure. AWS networking feature works with various types of workloads and provides security, availability, and manageability. Now as most of the IT companies are working on cloud environments for cost reduction, high availability, data security, we are getting some interesting networking features as services. We can manage these quite easily too. Among those services is Elastic Network Interface (ENI) which we get by default when we create an EC2 instance on AWS and can be seen while the instance is being created. It may surprise many of us that the security group is attached to this elastic network interface.

Handling Private Affair: A Guide to Secrets Management System

Needless to say an automated system, no matter how big or small, must be designed with scale in mind. We’ll talk about laying foundation for a robust and malleable setup which is a useful read for everyone.

In my experience as DevOps and SRE, I’ve enjoyed quite a lot of things this profession offered. From the satisfaction of fulfilled curiosities to the anxiety of unforeseen mishaps, it delivered one day after the other. The nervousness in the face of new challenges, happiness on receiving appreciation, thrill during troubleshooting, the pride after a successful implementation, and a lot more. But the one I found myself seeking was boredom. Yes, plain old silence where no surprises are met, everything runs exactly as it should and you enjoy listening to dropping pins. This is especially true when the system in question is your own design. There’s no greater sentiment. It is like watching a bird that you’ve freed soar.

BigBulls Game Series- Patching MongoDB using Ansible

MongoDB is the most popular NoSQL and an open-source document-oriented database. The term NoSQL means ‘non-relational’.This simply means mongo does not base on a table-like relational database structure. It is moreover a schemaless database. In Mongo information is stored in JSON-style documents.

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Learn the Hacks for Running Custom Scripts at Spot Termination

Nowadays, it is very common to run applications on Spot instances. In this scenario, where a spot instance could be terminated at any point of time because of AWS pulling back their resource or ASG Scale-In incident, we need to have something in place to handle the termination smoothly so that we can complete our final tasks before the system shutdown. It could be executing some scripts, unmounting some storage device, shipping final log files to S3, or uploading cache data in a centralized server like Redis.
Today, I will attempt to cater to this problem.

First of all, let’s think of trying to run a custom script prior to shutdown in our local system. If everything works fine, the same would be applicable for ec2 spot instances too.