Kubernetes and Docker: 9 reasons why DevOps is better with Docker and Kubernetes image

Kubernetes and Docker: 9 reasons why DevOps is better with Docker and Kubernetes

Kubernetes and Docker can help companies overcome one of the biggest challenges - a long time to market, which usually occurs when your development process is slow. When deploying applications, most teams are usually confronted with a problem between Dev and Ops. These two departments build the same application but work in completely different ways. Wouldn't it be nice if they worked together without any misunderstandings in order to reduce the time to market?

I’ve put together this list of benefits that DevOps + Docker & Kubernetes can give you over the traditional DevOps approach.

kubernetes and docker with hidora

The traditional DevOps approach

  1. In the traditional DevOps approach, developers write code and put it in a git repository.
  2. They then check how it works locally and in a development environment.
  3. They start a code build process using a CI tool, e.g. Jenkins, which also runs functional tests during the build. If the tests pass, the changes are merged into a release branch.
  4. The tests are processed on stage-environment and at the end of the sprint the release is published. The system administrators prepare the scripts for the deployment of the applications in production, using Ansible, Puppet or Chef.
  5. Finally, the system administrators deploy the changes to production, i.e. they update the version.

The problems of the traditional approach

Improving the DevOps approach with Docker

  1. The main advantage of this approach is that developers and system administrators use the same tool - Docker.
  2. Developers create docker images from docker files at a development stage. They build them on local computers and run them on a development environment.
  3. The same Docker images are used by system administrators who perform upgrades to the stage and production environments using Docker. It is very important that Docker containers are not patched when upgrading to a new version of software. This means that a new version of your software is represented by a new Docker image and a new copy of the Docker container, but not by a patch of the old Docker container.
  4. This allows you to create immutable environments for development, storage and production. There are several advantages to using this approach. Firstly, there is a high level of control over all changes, as changes are made using immutable Docker images and containers. You can revert to the previous version at any time. Development, implementation and production environments become more similar to each other than when using Ansible. By using Docker, you can ensure that if the functionality works in the development environment, it will also work in the development and production environments.

How to get DevOps superpowers with Kubernetes and Docker

  1. The process of creating the topology of an application, containing several interconnected components, becomes much easier and more understandable compared to Docker.
  2. The load balancing configuration process is greatly simplified by the integrated service and input concepts.
  3. With the built-in features of Kubernetes Deployments, StatefulSets and ReplicaSets, the process of continuous update or green/blue deployment becomes very easy.
  4. You can do CI/CD using Helm, which is more comfortable than using Docker containers for these reasons:
    • Helm diagrams are more stable and production ready than individual Docker images. You have most likely faced a problem when you tried to interconnect different Docker containers in a common topology, but failed because these images were not ready for this type of interconnection.
    • It provides you with a high-level template language and a concept of application versions that can be undone if necessary.
    • In addition, you can use existing Helm graphs as dependencies for your own graphs, allowing you to have complex topologies using third-party building blocks.
  5. Kubernetes supports an out-of-the-box deployment scenario across multiple cloud sites (AWS, Google, Hidora or another hosting provider) through federation or service mesh tools.

Have you simplified your DevOps processes by using Docker and Kubernetes? Share your experience!

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Written By

Matthieu ROBIN


Matthieu Robin is the CEO of Hidora, an experienced strategic leader, a former system administrator who has managed and configured more environments manually than anyone else on the planet and after realising that it could be done with a few clicks created Hidora SA. Follow him on Twitter.

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