Docker on CentOS 8

My main use case for Docker on CentOS  involves running containers, testing applications, and pulling out niche applications, older versions of applications or software, and then using those for testing.

A quick specific example of an application or scenario I have tested using Docker on CentOS  is testing an old version of Ruby code inside a Docker  container. For instance, a Rails application written on Ruby 2.7, when the Ruby version is now 3.something or four as well, I just pull out the Docker  container and then run it.

I have additional insights about my main use case. Testing out older versions of applications and older versions of software is one aspect. Another aspect is running our development server, not a local server, but the development server. Then it goes to staging and production. I run the development server on Docker on CentOS containers.

The best features Docker on CentOS offers for me include volume mount, where I can mount a directory inside the container as a volume and then write it inside, and then I get the whole thing on the host as well. If I write it outside on the host, it gets inside. This is a really good feature.

The volume mount helps my workflow and productivity significantly. If I need to test something, I just mount the volume, mount my code as a volume, make changes, it appears inside, test it, and then I am done after testing.

Docker on CentOS has positively impacted my organization by making testing easier. I do not have to install older versions of applications and then make my system or service study. I just pull out a Docker container and then use it. This helps in saving time as well. When I run the whole thing in Docker Compose, that also helps in speeding things up. Once I have Docker Compose created, I just do Docker Compose up, and then everything works. This is mostly time-saving.

I believe everything is good, and there is no improvement needed for Docker on CentOS.

Regarding needed improvements, I think compatibility is already compatible with everything that is there. However, documentation could be improved. Documentation could be made more accessible, more readable, and all those things.

I have been using Docker on CentOS for almost six years or more.

Docker on CentOS is very stable.

Regarding scalability, it just scales depending on your machine configuration.

The customer support for Docker on CentOS is not really needed. Why would someone reach out for customer support for an open-source software that has lots of documentation and community support? No one would reach out to Docker for support for a simple thing.

I have not previously used a different solution. Docker was the first one and it is going to be the last one.

My experience with pricing, setup cost, and licensing is that there is no licensing cost required. The setup is just running a few commands that are already recorded or documented. Nothing much is involved.

I have not seen a return on investment since you install and use it. What return on investment is needed when using a simple tool? It is just there to use.

My experience with pricing, setup cost, and licensing is that there is no licensing cost required. The setup is just running a few commands that are already recorded or documented. Nothing much is involved.

Before choosing Docker on CentOS, I did not evaluate other options. I just chose Docker on CentOS.

I would add that those are the features I mentioned by default, so I have no comments on networking, images, or resource management.

My advice for others looking into using Docker on CentOS is just to install and use it. I give this review a rating of 9.

My main use case for Docker on CentOS  is for a containerization platform, packaging applications with their dependencies for lightweight and portable containers.

A quick, specific example of how I use Docker on CentOS  for containerization is that we have dockerized our frontend, backend, and database into containers, and we have hosted them using Docker on CentOS. We have multiple software images for availability and for application uptime, and it is lightweight.

The best features Docker on CentOS offers are its lightweight and fast nature, with containers sharing the OS kernel, making it faster than VMs and providing quick startup time. It also ensures a consistent environment where applications will work on every machine, not just the developer's machine, and offers resource efficiency, such as no full OS per application, allowing me to share my infrastructure with multiple containers and applications. Additionally, it provides easy deployment and scaling.

The most valuable features to me in my daily work are all of the following: lightweight nature, consistent environment, resource efficiency, and easy deployment. We do not need to worry about our source requiring more memory; it is lightweight and fast, and the deployment does not take much time. If we want to scale our infrastructure, we can just create a new Docker  image and it will scale, so all of those features are important to us.

Docker on CentOS has positively impacted my organization because we do not need much resource per application, and our deployment time has decreased, allowing us to avoid using more VMs to host our applications. Regarding the decrease in deployment time, I am saving 30 to 40 percent of our time, and before Docker , we had been using 10 to 20 VMs, but after that, it has become half, approximately 10 or 11 VMs.

Docker on CentOS can be improved by addressing security concerns, such as sharing the kernel, which leads to weaker isolation than VMs. Sometimes misconfiguration can happen, such as using ports or other networking issues. Currently, as I have heard, Docker on CentOS is not officially supported, so I am considering whether there are alternatives or not.

I have been using Docker on CentOS for two years.

Docker on CentOS is stable, but as I mentioned, there are some improvements needed, and after that, I hope it will be good.

Docker on CentOS's scalability is good; if we need more resources, we can just spin up a new Docker image, so scalability is good.

I previously used VMs, but they were expensive, and it was an overhead for us to manage, so that is why we switched to Docker on CentOS.

After switching to Docker on CentOS from VMs, I have seen a return on investment, saving 40 to 50 percent of our money as well.

My experience with pricing, setup cost, and licensing is that there is no licensing in Docker on CentOS, and the setup is easy; we just need to create the images for our application, so it is easy.

Before choosing Docker on CentOS, I did not evaluate other options because we had a clear mindset that we wanted to use Docker on CentOS. We saw the public review, so that is why we thought we wanted to use Docker on CentOS only.

My advice to others looking into using Docker on CentOS is that if they want to containerize an application, make their deployment easy, avoid VM management overhead, and save costs, they can use Docker on CentOS. I would rate this product an 8 out of 10.

We have servers running operating systems like Ubuntu  and CentOS . Regarding Ubuntu , we are interested in LAMP stack, Ubuntu, or Jenkins  on hardened Ubuntu, but we are not using LAMP stack. We are using Ubuntu and then MySQL  in a different way, but not LAMP stack. For CentOS , Docker  is there, but we are using PostgreSQL , not MariaDB . Docker on CentOS  is what we are using. It has been about six years since we started using Docker on CentOS . It is running one of our systems hosted there, on our document management system.

How fast the application runs is one of the biggest advantages for me in Docker , but on the downside, issues to do with space utilization arise sometimes. Since we implemented it, the system really improved and became responsive very fast. When you have limited space, the system tends to crash from time to time, so you have to ensure that you have enough space at any one point.

We are using the orchestration feature in Docker. That was the main motive for having orchestration; it helps better manage the containers.

I am comparing Docker on CentOS with the one that is running on Ubuntu, and in terms of scaling up, it is easy to work with when it comes to that. That is the main feature I have been benefiting from.

Because it was first, we recently did it on Ubuntu, but initially, it was running on CentOS. We were comparing and seeing which one runs better, but I realized on Ubuntu it is much easier to work with.

The lightweight architecture on CentOS affects my resource utilization significantly.

Crashes are the main issue I see. I have not really noted down specific metrics, but I realize that when it comes to disk space utilization, it really goes up so fast. We are not using a CI/CD pipeline in Docker. The main issue comes from running out of space; that is when crashes happen, and that is the only thing I have seen as an area for improvement in Docker.

I have been working as a customer with Docker mainly for around six years.

Mainly, the support we get is from online communities in case of any challenges, and there may be some people around who have more expertise in that area; that is how we have been managing. We have not gotten into a state where support is complex, but most things can be easily found as resources online to help resolve those issues.

It is quite complicated to install Docker on CentOS; it is not as easy as it is on Ubuntu.

Mainly, it is about time with Docker; I think it helps us save in that way, and using open source has been helping us not to invest in that. I could say it is maybe forty percent compared to before using Docker.

The lightweight architecture on CentOS affects my resource utilization significantly. I have not really noted down specific metrics, but I realize that when it comes to disk space utilization, it really goes up so fast. We do on-premises deployment mainly with Docker on CentOS, so we have not explored the cloud aspect. Because it was first, we recently did it on Ubuntu, but initially, it was running on CentOS. We were comparing and seeing which one runs better, but I realized on Ubuntu it is much easier to work with. Mainly, the support we get is from online communities in case of any challenges, and there may be some people around who have more expertise in that area; that is how we have been managing. I gave this review an overall rating of seven out of ten.