This mostly separates the running process from other resources on the system. In this blog, we’ll look at how to install Docker on CentOS 6, 7, 8, and Stream, then look at some Docker basics that can help you to get started.ĭocker is a program for building, running, and managing containers.Ĭontainers are run as namespaces under the linux kernel, and are implemented with images that contain the filesystems and all data needed to run the process in the container. Luckily, the process for CentOS Docker installation on CentOS 6, CentOS 7, CentOS 8, and CentOS Stream is fairly simple. For CentOS users, that means an increase in the need to install Docker on CentOS. That’s fine for many cases, but next I will attempt to figure out how specify via a Dockerfile that man is installed.Docker has quickly become the most popular program for containerization. I can’t (that I know of) inspect the container and know whether or not man is installed without running it. Progress! Now we have a CentOS container where man is already installed. Quite the improvement! Now we need to save our /]# exit For example, this doesn’t even have man /]# man manīash: man: command not /]# yum install /]# man man What if I want to modify the container? Right now it is pretty bare-bones. Instead we can tell it to run interactively and with a terminal by specifying a couple options: That makes sense, because we’re not telling the containerized OS to do anything - it starts, it doesn’t have anything to do, and so it shuts down immediately.
What did it do? How do I access it?ĬONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
I found the CentOS container repository on Docker Hub: ĭid it do anything? It looks like it did something. I ran through a couple tutorials on the Docker docs site and created a account to get some basic familiarity. I’ve thought for years that containerization is a great idea, but I haven’t actually done anything with containers yet.
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