Portainer - The easy way to manage Docker

Portainer - The easy way to manage Docker

In this tutorial, I’m going to demonstrate how to get Docker up and running quickly and how to simplify Docker management with the Web-Based graphical management tool, Portainer. Portainer - The easy way to manage Docker

There are still a lot of Developers and IT Professionals that have no experience with Docker. My personal experience is they think Docker is complex and challenging to manage.

In this tutorial, I’m going to demonstrate how to get Docker up and running quickly and how to simplify Docker management with the Web-Based graphical management tool, Portainer.

Docker vs Virtual Machines

Before we start, a quick overview of the difference between Docker and Virtual Machines might be helpful. If your already familiar with Docker just skip this section.

A Virtual Machine (VM) is an encapsulated operating system, running on top of another operating system. The VM uses the memory, processor and disk resources of the underlying hardware. The critical point here is that the Operating System running in the VM requires a substantial amount of the host machines resources to run. On a typical 16GB, i5 machine, you would struggle to run five virtual machines simultaneously. Even if they were not running any applications, you would quickly see a significant degradation in the performance of the underlying operating system and the VM’s start to freeze.

Docker containers, on the other hand, make use of the hardware resource through the underlying Operating System almost as though they were an installed application (That is a very simplistic description). The images used to build a Docker container are very small in comparison to a VM, often only a 40 or 50 MB. Since there is not a full operating system to maintain inside a Docker container, memory and processor resource usage is typically very low. I often have 20+ containers running on my 16GB Mac Book Pro. That would be impossible using VM’s.

Portainer

By default, we manage Docker through the command line. Portainer provides an excellent and highly informative user interface for managing all aspects of Docker. It charts, and dashboards provide realtime charts of container resource usage. Starting and managing containers and stacks can be done with a few mouse clicks.

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