Docker vs kvm

Server and cloud administrators have long had multiple virtualization options to choose from. InDocker container virtualization has emerged as yet another choice and according to research from IBM, it could well be the best choice in terms of performance.

The Docker model is a bit different in that only the host operating system is required and containerized apps then run on top of that OS.

The basic premise behind containers is a more optimized delivery approach.

Is KVM or Docker Faster for Server Virtualization?

The researchers found that Docker delivered near-native bare-metal performance while KVM performance was approximately 50 percent less. Though the IBM research is very favorable to Docker, the report noted there are some performance hurdles.

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Docker container technology was first launched as a public project in March 20 of Since then the project has reached its 1. Docker is also inspiring a wave of new companies, including Docker Inc, that are building innovations around the open-source Docker technology. Docker Inc has its Docker Hub effort, which includes private repositories for developers. The CoreOS Linux project is building a commercial model around deploying highly available and clustered Docker server deployments at scale.

Other vendors in the Docker ecosystem include CenturyLink, which recently launched its Panamax Docker deployment technology, and ClusterHQwhich is building data-aware Docker technologies. Follow him on Twitter TechJournalist.

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TechnologyAdvice does not include all companies or all types of products available in the marketplace. Sign in. Log into your account. Forgot your password?It's basically an alternative to LXC's tools and distribution template system with the added features that come from being controllable over the network.

Docker kicks KVM's butt in IBM tests

LXD is an open source tool with 2. Pros of KVM. Pros of LXD. Pros of KVM 2. Pros of LXD 7. Sign up to add or upvote pros Make informed product decisions. Sign up to add or upvote cons Make informed product decisions. What is KVM? What is LXD? What companies use KVM?

What companies use LXD? Sign up to get full access to all the companies Make informed product decisions. What tools integrate with KVM? What tools integrate with LXD? Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License GPL version 2.

When used as a machine emulator, it can run OSes and programs made for one machine e. By using dynamic translation, it achieves very good performance. When used as a virtualizer, it achieves near native performance by executing the guest code directly on the host CPU.

Virtuozzo leverages OpenVZ as its core of a virtualization solution offered by Virtuozzo company. Virtuozzo is optimized for hosters and offers hypervisor VMs in addition to containersdistributed cloud storage, dedicated support, management tools, and easy installation.

Proxmox vs ESXi - Proxmox FTW! Sorry VMWare :^( Free Open Source Alternative!

It is a hypervisor using a microkernel design, providing services that allow multiple computer operating systems to execute on the same computer hardware concurrently.

It was developed by the Linux Foundation and is supported by Intel. The Docker Platform is the industry-leading container platform for continuous, high-velocity innovation, enabling organizations to seamlessly build and share any application — from legacy to what comes next — and securely run them anywhere.

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Yes, KVM guests e. Your question basically describes my workload. The concise explanation why it works is that virtual machines QEMU, etc on Linux use a hypervisor KVM in the case of QEMU, but Virtualbox and VMWare use different hypervisors to use your computer's hardware resources, while Docker uses linux namespaces to simply use your currently running kernel's available hardware resources, but segregated from your main operating system.

In that way, KVM guests and Docker actually run using separate technologies and don't really even inter-relate to each other at the kernel level. This is in contrast to the case where you try to use different hypervisors e.

I researched on this a bit and found that the kernel component of KVM was built into mainline Linux since 2. KVM is well integrated into Ubuntu You can read more about KVM and Docker respectively. Ubuntu Community Ask!

Sign up to join this community. The best answers are voted up and rise to the top. KVM and Docker on single Ubuntu host? Ask Question. Asked 2 years, 4 months ago. Active 2 years, 2 months ago. Viewed 7k times. Appreciate your thoughts! Yes you can do that.Try us! All Rights Reserved. Icons Provided by Icons8.

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Toggle navigation. Backup and Recovery. There are some differences between the two - functionality related and performance related. Please read more details below to assist in determining which technology will best fit your needs. Because of this, some functionality is limited, such as: - Using Windows and other operating systems. Because the overhead is lower, the overall cost to host the containers is lower than KVM. We pass those cost savings to our customers.

KVM servers run their own operating system, with its own kernel, and virtual hardware. While KVM may offer slightly lower performance than LXC in some ways, the stability, features, isolation, and flexibility it offers allows our customers the ability to accomplish any workload when required.

Use LXC if you know you will use only Linux-based operating systems, and you will never need to tweak or install your own kernel. Was this answer helpful? Yes No. Tag Cloud. Get in Touch We love to solve problems! Don't hesitate to contact us! Please enter a number between 8 and 64 for the password length. Password Length. Generated Password.

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Generate new password.We would like to answer this question in the following blog post. These days, the virtualisation of servers, network components, storage solutions and applications is unavoidable. With the use of virtualisation, server hardware resources should be optimised through the use of high-performance hardware components. Energy, data centre and other costs can therefore be reduced. However, as virtualisation technology represents another level in the technical landscape, additional specialists are required for this new level.

While the introduction of virtualisation does reduce operational costs, it also increases complexity at the same time. Around 10 years ago the first companies began to run productive systems on virtual hosts.

While some large IT corporations may have already been using virtualisation solutions, these solutions only worked with special server types, expensive operating systems and licence packages. A hypervisor is the technical logical component that enables communication between the virtual machines and the hardware resources. With a type 1 hypervisor, no full-fledged operating system is required.

Docker vs KVM vs Native performance

A type 2 hypervisor requires an operating system for installation, e. Ubuntu, Debian or another Linux distribution. How can the usage of containers support you and what possibilities does this technology offer you for process optimization? Find the answers in our new whitepaper. For the product palette of our virtual server we use the following technologies:. The kernel of the host operating system and the virtual machines are separate and fully isolated from the other VMs. Depending on the product, the management tool loads the necessary template and creates the new VM with the corresponding resource parameters.

But what happens when a VM is up- or downgraded?

docker vs kvm

Here, nine changes the configuration file of the virtual machine. Following the general explanations we have just provided, we are now going to turn to the actual subject of our blog post.

A container represents a seperate environment that depicts a software or application. The container is based on an image which includes the alrady installed and configured software. However, kernel and driver are missing from this image, as these components are provided by the host kernel.

These images are kept relatively lean, as they contain only the necessary binaries, libraries, configurations and application data. The term application virtualisation is also associated with container virtualisation. Thanks to the clearly-defined container software layer, the porting of an image from a development system to a productive system is simpler in several respects, with fewer associated dependencies than with VMs.

In a container management solution such as OpenShift, Kubernetes or Docker-Swarm the customer takes on the creation of the container image and the corresponding application landscape and initiates the container creation process. This way, the customer can create the desired application environment and infrastructure with the previously constructed images.

Choosing the most suitable virtualisation solution depends on security, preparation time and resources.Unfortunately your comment does not provide enough details for me act upon. Should you care to elaborate on your concern I'd be happy to revisit the data, rerun the tests, etc. Moreover you can find raw data collect from the system using dstat linked in the blog post above.

I assume they are referring to the fact that load average is not a percentage. Your findings look interesting. But, to make more out of your data you should combine the graphs together. That way you could exhibit the differences between the too approaches and we as readers can see it clearly.

The same applies for the graphs in slides 15 and Also, in slide 24 you can compare "usr" between Docker and KVM and "sys" between the same.

docker vs kvm

I didn't have time to go through the whole presentation, but it looked good so far. Thanks for the feedback You can find a comparison of user CPU and memory both on the same graph on page 49 and 50 of the presentation. One problem with combining the graphs together is that the graph lines become a bit dense making the results hard to differentiate.

I will consider such an approach if I publish subsequent iterations of the deck. The data in its raw format is provided in this blog post so that readers can make such comparisons as they wish.

Moreover the raw data contains additional points such IOs, interrupts, context switches, etc. This is great. Thank you! Also, if you could, I suggest updating the architecture diagrams to specify the Heat plugin as DockerInc::Docker::Container. Many of our older slidedecks had the wrong path set the path changed when it went upstream. Newer decks the right module path! Thanks - Eric Windisch, Docker. Eric, v2.

docker vs kvm

This blog post has also been amended to address as well. Your 26x better CPU number is bogus because you are comparing slopes of one line that is essentially flat with one that has a clear slope to it.

By removing the first few data points from each line where the data is flat, and appears to be pre-test run the docker line slope can be made to be negative or arbitrarily small, so the comparison goes to infinity. Understanding why the behavior is different would be useful.

The average CPU usage difference is more like 5x and appears to be measuring the startup cost of the container, not the running cost.

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Thank you for your comments. I will rerun the cloudy portions of the test taking into consideration your comment above and publish the results. These tests are presented in full disclosure in an attempt to educate the community and therefore I welcome feedback. Adrian, v2 of the benchmarks have been completed and uploaded to slideshare. In addition this post has been updated to remove direct claims of density factors -- that is an exercise left to the reader. Thanks for review, it was excellent and very informative.

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As the graph below and others in the paper show, Docker kicks KVM's butt in some tasks, and holds its own comfortably in most of the tests conducted. IBM's results for Docker vs. KVM results running Linpack on two sockets with 16 cores. Each data point is the arithmetic mean obtained from ten runs. Error bars indicate the standard deviation obtained overall runs.

With Docker only just having reached v 1. Nor is Docker perfect, with the authors finding it network address translation makes extra traffic for networks. The paper concludes with some interesting observations about how the differing performance of the two contenders will impact future cloud infrastructure designs. Here's the best bits from those considerations:. We see no technical reason why this must be the case, especially in cases where container-based IaaS can offer better performance or easier deployment.

Containers can also eliminate the distinction between IaaS and 'bare metal' non-virtualized servers since they offer the control and isolation of VMs with the performance of bare metal. Rather than maintaining different images for virtualized and non-virtualized servers, the same Docker image could be efficiently deployed on anything from a fraction of a core to an entire machine. We also question the practice of deploying containers inside VMs, since this imposes the performance overheads of VMs while giving no benefit compared to deploying containers directly on non-virtualized Linux.

If one must use a VM, running it inside a container can create an extra layer of security since an attacker who can exploit QEMU would still be inside the container.

Scripts used for the study can be found hereif you'd like to run the tests yourself. The Register - Independent news and views for the tech community. Part of Situation Publishing. Review and manage your consent Here's an overview of our use of cookies, similar technologies and how to manage them.


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