Openshift Interview Questions

Openshift is basically a computer software product which is served from Red Hat. It is a cloud development service and an open source development platform for potential developers. The fundamentals of development and deployment of the applications over the cloud are conducted with Openshift.

The real or virtual equivalents of a machine instance with a container are known as a pod. Each of the pod has its own internal IP address hence is the real owner of its entire space. Containers which are within the same pod can actually share their local storage and networking space. Pods are treated as an immutable instance and any change cannot be made to a pod definition while it is in the running mode.

In the terms of Openshift isolated clusters are called as Gears. Gears perform the functioning of the application. Instead of a software piece application is basically performed by gears. Another major term is a cartridge which is basically a construct made up from the reusable gears.

It is again a Red Hat's service platform which fluently provides all of the developers and its organizations with many features. This includes auto-scaling, security deploying new applications, scalable resources with significant configuration and many more. The Openshift enterprise also supports programming languages and their framework, integrated tools and application lifecycle.

As an open source service project, Openshift provides many of the deployment and applications of the web services on the cloud.

Automation in Openshift includes the source code management, application build up, scaling and deploying, management and many more.

Docker strategy is used in Openshift in order to create the images. These images are later uploaded to the Docker registry.

As pod is comprising container and services, hence service in Openshift is an assembly of logical pods. Service is basically considered as a REST object in Openshift. Routes are provided in Openshift in order to analyze and externalize the services which are prevailing or which are required in order to reach the hostname externally. It is done by using the routers developed by the admin commands.

Major build strategies used in Openshift app are:

• Docker strategy
• Custom strategy
• Pipeline strategy
• Source to image strategy

Well, both of them are the actual origin from open source projects and they equally provide Cloud Computing fundamentals. The major difference between them is that OpenStack provides infrastructure as service or in the form 'IaaS’. It also provides block storage and object storage to the bootable virtual machine. On the other hand, Openshift performs differently.

The most prominent features of Openshift are as-

• It supports multiple languages and database.
• Compatible towards the environment support.
• It solemnly provides a web console.
• Also provides remote debugging.
• It has proficiency in a rich command line toolset.
• It supports remote login to the application through SSH.

Openshift is a computer software product which is for container-based software management. The actually supported distribution by utilizing docker containers and DevOps tools of Kubernetes leads to the fundamental of this container.

DevOps tools basically fulfil most of the requirements which are essential in the fluent software delivery. These are as follows:

• Enhanced deployment frequency
• Incredibly lower rates of failure
• Time management between the fixes
• Fastest recovery during the new release of event

Most of the platforms are doing frequently code deployments in order to provide stable and reliable delivery.

The most prominent DevOps tools are-

• Git: it is a version control system tool
• Jenkins: it is a continuous integration tool
• Selenium: it is a continuous testing tool
• Nagios: it is a continuous monitoring tool
• Docker: it is a containerization tool
• Puppet, chef, ansible: all of them are configuration management and deployment tool

(For the next part of question you can answer if you have worked on any specific or all the tools. Mentioning that these tools provide good development quality software and deploying is easy and convenient, wrap up your answer).

The efficiencies of Docker and Kubernetes are utilized by Openshift with a control system. Many of the deployment pipelines are enabled through it which are later used for testing, auto-scaling and many more events.

Red Hat's public cloud application and hosting services development is known as Openshift online. On the other hand, Red Hat's most managed private cluster which is built around containers, powered by the Docker is known as Openshift dedicated.

The multiple functionalities of Openshift as a rich web console and command line tools provide the users with an extremely benefiting platform. It works in order to provide deployment and management with the application itself. An Openshift tool provides a single executable programming language and is available for most of the operating systems. These are as follows-

• Microsoft Windows
• Apple
• Linux
• Openshift Docker registry
• Openshift router
• Ether pad

Source code images are created in this, which is performed by the downloading and compilation of the same container. Images are created from the same code itself. In custom strategy, rpm and jar are created.

DevOps tools provide high-end facility with the management and deployment. Most of the technical benefits associated with it are:

• It provides continuous software delivery
• Quick solutions for the problems
• Functioning is quite simpler

Its benefits from business point of view are-

• Quick delivery features
• It provides table operating environment
• Maintains the time margin