Docker on Oracle Linux 10 Hardened

For the main use case of Docker on CentOS, I would containerize applications and enable consistent deployments. We can test across production environments and staging environments. We can easily package the dependencies and simplify the pipelines, and we can easily set up microservices.

With the architecture, we can plan it appropriately, and also run the services in isolation with load balancing involved. If deployments are done in Kubernetes, it will also be very helpful. We use it for our production deployments and for our internal architecture.

We mainly use our codes to create the images, and we package and containerize it using Docker on CentOS. We also build it and push it to our repositories and do the deployments to our Kubernetes clusters.

Since we are using a microservices architecture, Docker on CentOS containerization was very helpful. Teams can work on their relevant packages and relevant services. They can make only that change and push it easily to the production or the staging environments and test it.

It is very easy to segregate by team, and it is also very helpful to maintain the versioning. We can track the record, and we can easily roll back if something goes wrong. We can also plan the security and architect those things very tightly, which will be very helpful.

From an impact perspective, I would say the consistency Docker on CentOS gave us for deployments has also reduced many environment-related issues. For example, a developer would say it is working on their machine, but it was not working on the production or that particular environment. Since we use Docker on CentOS, we have reduced those issues completely.

The deployments are also faster; they are 75% faster than the previous traditional deployments using pipelines. We can also use the same images for the same environments and for the other environments. It is very easy for the teams to manage because we do not need to create every environment's images separately. We can use the first image for production if it is good. From that, we can deliver the software more efficiently.

Regarding deployments being 75% faster with Docker on CentOS, cost-wise, we are able to save at least 50% of our annual cost. The collaboration is also very helpful for the teams to understand, and they can easily accomplish work; the efforts are much less compared to the previous deployment efforts. Reliability-wise, it will also be very reliable among the teams.

Feature-wise, for Docker on CentOS, I would say the security and the containerization are valuable. The isolation is there, and we can run multiple applications independently. We can package the application and all the dependencies into portable containers, and we can easily deploy it in any other environment.

We can also use lightweight containers, which will not be that heavy, so it will use less storage compared to other containers. We can also easily integrate CI/CD pipelines for that, and we can do the deployments. We can include build testing pipelines, plus it will be very much scalable. We can integrate and scale it as we want, and security-wise, it will be very easy to handle those things. The rollbacks and versioning are there.

Security features of Docker on CentOS mean we can reduce the attack on the main service from the team. We can maintain consistent security across development and production environments. We can give the least privilege access to the containers and the users. We can limit the Linux capabilities; unless we need a privileged container, we do not need to give them access.

We can also use the image scanning options to scan the vulnerabilities and find them out before the deployments. We can use the base images and trust those; in that case, we can have base image security. We can also manage the secrets of our credentials; instead of hard-coding into a Docker file, we can use the secrets and variables options. We can control the access, and the integration is very helpful. We can use Trivy scan to scan the images and check if there is something we can detect before deployment.

I would say the security management with Docker on CentOS requires continuous scanning of images and patching. There should be a resource for that. Also, for troubleshooting, the OS lifecycle management is there, so if we can fix that, it would be beneficial. Also, for the OS and storage and resource management and the maintenance, those areas need improvement.

I have been using Docker on CentOS for more than five years in several industries.

Docker on CentOS is stable.

We can set up our pod scaling options, and also we can do horizontal and vertical scaling. It supports a lot of the scaling options.

Customer support is fine. I would rate the customer support in the seven to eight range.

Previously, we went with traditional deployment methods, but in time, it was pretty complex for us to manage the environments. The client base also grew, so we thought to switch to Docker on CentOS, so it would be helpful and easy.

We got ROI with Docker on CentOS; our ROI improved by 20%. We were able to save at least 40% of our annual costs on the products and the licensing.

For the team, we were able to manage those things with our current capacity. Time-wise, we were able to save 30% of our time that we spent on deployments and sub-production deployments and support.

Pricing for Docker on CentOS is fine, but if we can consider some long-term purchasing plans, it would also be beneficial. As for setup costs and those things, we do not see that as a cost because we get the output from the client's side.

I would rate Docker on CentOS in the seven to eight range. It was very easy, and it gave consistent deployment with more reliability, which kept it from being a perfect score.

Docker on CentOS provides a solid foundation for running AI workloads securely, but for governance, it pretty much depends on how we need to configure those things and manage the containers with access controls and those things. Docker on CentOS is also pretty much reliable, so we are happy with the results.

We mostly use public clouds with Docker on CentOS; sometimes we go with hybrid and on-premise solutions. For the provider, I would choose Docker Hub mostly and also Azure AKS solutions.

Docker on CentOS is providing a pretty handy solution. If someone is about to try it, they can try it and get that. Just have a look and try it.

My main use case for Docker on CentOS is for deployment, specifically for Python applications, where I use a base image, add the instructions, make a container image, and deploy it to an OpenShift cluster and Kubernetes cluster for orchestration.

I used Docker on CentOS for a Python ML application, where the developer commits the code with a Dockerfile, and we use the Dockerfile instructions to make a package and deploy it to the OpenShift cluster, which I can then manage, and based on monitoring in OpenShift, I can monitor the Docker container using readiness probes.

I have previously worked with Docker running directly on CentOS, deploying my own application to CentOS using the host network and bridge network for connectivity from the OS to the container. I would then expose the port, and during the testing phase, I was working on Docker, CentOS, and Kubernetes.

Docker on CentOS has positively impacted my organization by providing more cost efficiency. Previously, we used virtual machines with Hyper-V that required more CPUs and memory space. Now with Docker containerization, it helps minimize resource usage and costs, allowing us to focus on only what the application really needs.

I can share specific metrics regarding cost efficiency with a 40% reduction after switching to Docker on CentOS, cutting down hardware usage by 40% and utilizing 60% for containerization instead, along with a drastic reduction in running efficiency by allowing us to use only specific support libraries for applications.

The best features Docker on CentOS offers me include the fact that previously, when we were using virtual machines, it used the total OS, but with Docker, it only uses the specific libraries required for the container, utilizing host OS libraries and running the container in isolation for the application.

The isolation and efficiency of Docker on CentOS have helped my work by allowing us, when we used Docker Swarm for multiple containers and Macvlan for multiple container connectivity, to expose the application to the outside through our organization's separate firewalls. Now, with OpenShift orchestration, it provides a more structured view including Docker, NGINX, and the Ingress controller to expose it to the outside.

In my experience with Docker on CentOS, I found it valuable when I was using CentOS mostly with local libraries before moving into container orchestration like OpenShift and Kubernetes, concentrating on those. Most managing tools are on Kubernetes and OpenStack, but if I get the chance, I work on CentOS.

Docker on CentOS can be improved in terms of networking complexity, particularly for exposing services, where we now rely on Macvlan and other CNI plugins. I noticed container-to-container security was not good at that time and we depended on SELinux without specific containerization security, which requires improvement compared to OpenShift.

Regarding needed improvements, the points I noticed revolve around security and network connectivity.

I have been using Docker on CentOS for three years.

In my experience, Docker on CentOS is not stable since it is open-source and requires customization based on the application, which is a part of our work.

Docker on CentOS's scalability is effective, and we can utilize Docker Swarm along with its scalability features like HPA, horizontal pod autoscaling, and vertical pod autoscaling to handle growing workloads well.

My experience with customer support for Docker on CentOS involved resolving our own issues for a test project, and we did not use support services.

I didn't use a different solution before Docker on CentOS, and now ContainerD is emerging, but I have no prior experience with other solutions.

I have seen a return on investment from using Docker on CentOS in terms of lower cost attributed to using less hardware compared to virtual machines, achieving cost decreases from 100% to 40%, but for employees, I haven't noticed significant changes at the resource level.

My experience with pricing, setup cost, and licensing for Docker on CentOS involved only free versions in a test environment, without any production purchases of Docker or Docker Hub, as we worked exclusively with open-source versions.

Before choosing Docker on CentOS, I evaluated other options such as Kubernetes, which is more for orchestration, or OpenShift.

I would rate Docker on CentOS a seven out of ten.

I choose seven out of ten because I am currently comparing it to OpenShift and Kubernetes, and since I am not working that much on CentOS anymore, I concentrate more on OpenShift, which influences my rating.

Regarding Docker on CentOS's AI capabilities, we need to provide security ourselves using CentOS, SELinux, and network security, as I haven't seen any AI features in Docker containerization.

We use Docker on CentOS deployed on-premises, utilizing Hyper-V with the ability to use Oracle Cloud for CentOS instances, deploying to Hyper-V.

My advice for others looking into using Docker on CentOS is to remember that they are open source, requiring more practice to be comfortable, and it's important to do a POC before choosing.

I use Docker on CentOS or on other Linux systems in my work, particularly for trying out new tools and for testing. It often makes sense there, and then of course also in production environments where certain settings and services should always have exactly the same state.

Docker on CentOS was made for that purpose, so that we don't keep running into the dependency problem that everyone knows: it works on my system, but not on the other one. Docker on CentOS is basically there exactly for that.

I do not have anything else to add about my use cases. Docker on CentOS itself is an excellent tool, without question. There are alternatives you can also try out, but I think as of today Docker on CentOS is probably still the most widely used container environment.

Docker on CentOS has had a positive impact on my company and my way of working because I can virtualize quickly, without carrying around all the overhead of having to check what's currently allowed, what isn't, which user can do what, or starting entire virtual machines.

Instead, I can very quickly spin up a container, see what happens, test it, shut it down, change it, and spin it up again. That's really it—the development speed is naturally fast.

When I compare it to earlier times, when everyone was working in their own virtual environment and then seeing what happens, Docker on CentOS moves more in the direction of software development. Docker on CentOS also offers an advantage here, especially when it's cross-system—when we leave the Linux world and move to other systems, it's very helpful.

I cannot really provide concrete improvements in speed or efficiency using figures or examples because it depends on what the other prerequisites are, specifically which system Docker on CentOS is running on. When I pull an image, meaning when I download it from the internet, is it already cached? If it isn't cached, what bandwidth do I have?

In a cloud environment, for example, the bandwidth is usually always good, but the underlying hardware might be good or might not be good.

Locally, I work with a powerful system and I also have good bandwidth here, so in that case a single container is sometimes faster. Additionally, when I'm developing, I'm developing on a pure Linux system, which is a bit different than if I were doing it on a Windows or Mac system, where a Linux kernel or Linux virtualization runs in the background anyway just to run this Docker on CentOS container at all.

In my view, the best features that Docker on CentOS offers are not focused on any specific function, but rather on the fact that I can put individual small work instructions in there without accessing the main system directly.

Even if it's not fully virtualized, a part of it is virtualized that I can simply run in this environment and precisely determine what is actually allowed there.

Often, even if it's only for a single task, I can use this container. That's really the big strength—it's very flexible, and I can use it for the smallest activities up to somewhat larger tasks and can also combine containers, but now we're getting into Docker Compose, which is another topic.

The function or feature of Docker on CentOS that I use the most in my daily work does not involve a specific one; it really always depends on what exactly is required at the moment. In the data engineering field, it's often the case that I need a certain base to be available, I might need a few specific drivers installed, or I might just need to run Docker on CentOS normally in a CI/CD pipeline, where it is always run.

There isn't this one special feature; instead, it's always these small parts that I outsource precisely there.

I do not have any spontaneous additions about the features or strengths of Docker on CentOS right now. For me, the big advantage is simply these small things and that I can do them quickly, above all.

Spinning up a Docker on CentOS container compared to a virtual machine is just significantly faster. I can set something up with a single command in the CLI and it's just there immediately.

In my opinion, Docker on CentOS could be improved in several ways, but that's a good question—am I missing anything?

Not really. When I think about it, it fulfills its purpose and does what it's supposed to do.

I could still add a few thoughts about possible improvements, perhaps with regard to specific use cases or wishes for the future.

Docker on CentOS in the network is perhaps one such thing, although Kubernetes actually solves that problem too—whether it solves it well is another question, but it does solve it. Whether Docker Swarm was really the best choice for smaller things, I don't know. I also don't need to have all my Docker on CentOS containers running in the network and with each other in the network that often. These are usually more individual applications.

I'd really have to think hard about what else I'd wish for there, but I don't really know.

I use Docker on CentOS not continuously but every now and then, and not necessarily always on CentOS. I mainly use Docker on CentOS itself, running on various Linux systems.

Docker on CentOS is stable in my use. Docker on CentOS itself causes few problems; it's basically mature in my opinion. Sure, something can go wrong sometimes, but overall it's very reliable.

I rate the scalability of Docker on CentOS as very good, especially when I scale it out laterally. Scaling up vertically on a machine is relatively easy; I can ultimately run as many containers as my hardware allows. I can also scale it horizontally; in smaller environments, Swarm already works quite well, and in larger environments Kubernetes is then used.

I cannot judge the customer support of Docker on CentOS; I've never used it.

Before Docker on CentOS, I did not use another solution. Actually, when Docker really came out, I started using Docker on CentOS right away. Whether Docker on CentOS was the very first, I think so, but I'm not sure. Before that there was, of course, general virtualization or software like Vagrant that I could use to try things out—that all worked too.

Docker on CentOS makes things easier later on, especially in production.

I'd rather say they were the first, and today you see that there are alternatives, in my opinion mainly due to licensing. Docker on CentOS is a tool that's very helpful, is used a lot, and the people who really use it are basically all techies.

That means you can expect these people to be able to work with tools in the open-source space and not necessarily need a vendor who requires some kind of financial compensation.

I have seen a return on investment, though I cannot provide relevant metrics or examples such as reduced staffing needs, cost savings, or time savings in a broader context. It's not just related to Docker on CentOS alone, but rather more to Kubernetes as well and how I use certain tools.

Docker on CentOS itself plays a smaller role here. It's more about the fact that I can use open-source tools compared to paid solutions, which indeed take a lot of work off your hands on one side, but also cost money.

If you know what you're doing and are willing to employ and pay the right staff, you can potentially save a good amount of money. It always depends a bit on the case and when you use these tools.

Open source is, of course, very cost-efficient, but you shouldn't forget that it isn't free; you still need people who can operate and use it.

My experience with pricing, setup costs, and licensing for Docker on CentOS has been that since I normally use Docker on CentOS on Linux via the CLI and not Docker Desktop, this question about price doesn't really arise to a major extent. For companies that use it, where I'd also have to take a closer look, Docker Desktop plays a role. That really isn't the main point here. Especially when costs do arise, people quickly switch to alternatives like Podman to avoid exactly that. Setup costs are always there of course; someone has to set it up, and someone has to maintain it.

It's naturally convenient if you can use certain service functions, but in the big picture it ultimately still comes down to a human—and in the future perhaps to AI—to set this up.

For that I obviously have to pay. Whether I pay the AI provider or ultimately the employee, the consultant, or whoever, to set up, run, and of course maintain my system.

I did not evaluate other options before deciding on Docker on CentOS. Docker on CentOS itself is used everywhere and always, and I'd say CentOS is great. However, CentOS now has the disadvantage that it's no longer supported to the same extent; instead, people are switching more to AlmaLinux, or in other areas Ubuntu or Debian are used, or nowadays simply the individual Linux systems of the cloud providers. I wouldn't cling too much to CentOS.

I rate Docker on CentOS overall a 9 on a scale of 1 to 10.

I am giving it a 9 because, as I said, it solves almost everything. Docker on CentOS is an excellent tool, and I really enjoy using it. It will probably never be perfect, so no 10.

In my view, the governance and security of Docker on CentOS in connection with AI applications are significant. Honestly, I've never used AI with CentOS and Docker on CentOS. Docker on CentOS itself and, of course, AI that spins up Docker on CentOS containers on my Linux system again and again—it works excellently.

As for how secure it is, you always have to make sure you secure the system as much as possible. That means checking what I allow my system to do and not just letting it run wild, because AI, even today, might sometimes grab things it shouldn't grab.

I cannot rate the accuracy and reliability of the results of Docker on CentOS in the AI area or in general for my use cases by pointing to specific examples, as I don't know Docker on CentOS used in the AI area; I've never really had that combination.

In general, I can say Docker on CentOS and AI work excellently together because exactly the same thing happens again: AI runs iteratively. It also has to test and try things out, and there as much as anywhere else, it makes sense to work virtualized and not directly on the system. For virtualization, Docker on CentOS is again the obvious choice because it's small and fast. The combination makes sense in my opinion and is ultimately also used.

Docker on CentOS is deployed in my company in various ways. For example, I'd say we're a consulting company, which means we've probably already had all possible scenarios somewhere, and Docker on CentOS is simply part of everyday life, no matter where.

I wouldn't say there's a particular cloud provider that I prefer or frequently use for Docker on CentOS. Of course, the three big ones—AWS, Azure, and GCP—all offer it. There are also smaller, especially European providers. I wouldn't really say that we particularly prefer one or that I personally prefer one; instead, what matters is what the customer already has and what makes sense overall.

If a customer or someone were to ask me which one they should use if they don't have anything in use yet, I would base that on additional criteria. I would never choose a specific cloud just because I prefer the Docker on CentOS system there the best. There's much more to it than that.

My advice to others who want to use Docker on CentOS is to learn Docker on CentOS, try it out, and try to go into depth as early as possible. That means I've set up a container and you'll normally notice pretty quickly that the container is running as root, which is dangerous, and secondly that an image is very large.

The root problem is easy to solve. Making the image smaller then already requires a trick or two. I would say spend time with it, because if you learn Docker on CentOS well, you also learn something about Linux systems to some extent. It's fun, but in my opinion you should really do it via the command line and less via graphical tools.

Graphical tools are nice later to keep a certain overview, but building containers, setting them up, operating them, and learning how they work—that should all be done via the command line.

I mainly use Docker on CentOS on my NAS, and on my NAS I use it to deploy several different applications, such as monitoring how my NAS is running, handling downloads, and monitoring my NAS.

Docker on CentOS has had a positive impact on my organization by making it possible to save time and improve security. I can back up all the data quite easily and redeploy it on another machine or on the same machine in case of a crash.

Let's say it hasn't yet happened that I needed to restore the data, but in any case, I've done the backups, and so if it ever had to happen, I would be ready.

The best features offered by Docker on CentOS are that it's rather easy to set up. Docker is quite easy to set up, pretty simple to restart, and when I need to create new use cases, it's pretty simple to set up, stop, restart, and update.

Among all these features, the fact that I can set it up easily seems the most valuable in my daily work. For example, with simple YAML code, it's pretty easy to do, rather quick, and rather secure.

I don't know how Docker on CentOS could be improved at this point. I think it's already very good as it is, and they should just continue along the same path. I don't see any areas for improvement.

I've been using this solution for about three years.

Docker on CentOS is very stable in my daily use.

The scalability of Docker on CentOS is good.

I haven't had to contact customer support for Docker on CentOS so far.

I was not using another solution before.

Docker on CentOS is deployed in my organization locally, on-premises.

I have not observed a return on investment in terms of time or money saved, or other measurable benefits from this tool.

Since I use Docker on CentOS locally, it's free, so there's no cost issue regarding price, installation costs, and license management.

I did not evaluate other options before choosing Docker on CentOS.

My advice to other people who are considering using Docker on CentOS is that it's a very good solution. I would rate this product nine out of ten.