We used Docker. 

We have decided to migrate to the Kubernetes environment.

It's a great solution. It's a great competition to OpenShift. OpenShift has a huge market because they marketed it very well, but Mirantis Container Cloud is as good as any other container cloud solution. It's a containerization platform at an enterprise level. Docker is more at the desktop level, where you just run new containers on your desktop, but when it comes to scanning a huge application in a production environment, Mirantis works very well. It's a solution for your servers.

We were not using a different solution. We were using the VM-based solution from VMware in the data center for pipelines and Jenkins pipelines without container-based environments. 

Those are VM-based and the footprint is high. They're not maintainable. We need to rely on somebody else to maintain those environments. 

They are not self-contained or self-sufficient environments. That's the reason why we switched out to container-based solutions.

I started using Docker more than five years ago and before that, LXC (Linux Containers), also Google Kubernetes as I mentioned before. It all depends on the customer requirement and what they want from the application, and which features they will use. 

I don't think there's strong reasoning behind why my company decided to go with Mirantis because it used to be, and still is to some degree, the standard for containers. When it comes to containers, what comes to your mind is basically Docker. 

In my organization, we have a lot of developers that are developing applications on top of Kubernetes. Just to keep in sync with the newer version, they decided to switch from Mirantis to Containerd to run their containers, so I think it's changing. In my company, a lot of people are not even using Docker Desktop. Some people are using it because they're used to it and the company had a license for them, but a lot of people switched to an open source alternative to have some DUI for managing their containers.

We did not use another solution prior to this one.

I previously used Vagrant. I switched because of Docker’s speed, ease of creating images, and its low overhead.