Docker vs OpenStack: What are the differences?
What is Docker? Enterprise Container Platform for High-Velocity Innovation. 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.
What is OpenStack? Open source software for building private and public clouds. OpenStack is a cloud operating system that controls large pools of compute, storage, and networking resources throughout a datacenter, all managed through a dashboard that gives administrators control while empowering their users to provision resources through a web interface.
Docker and OpenStack are primarily classified as "Virtual Machine Platforms & Containers" and "Open Source Cloud" tools respectively.
Some of the features offered by Docker are:
- Integrated developer tools
- open, portable images
- shareable, reusable apps
On the other hand, OpenStack provides the following key features:
"Rapid integration and build up" is the primary reason why developers consider Docker over the competitors, whereas "Private cloud" was stated as the key factor in picking OpenStack.
Docker is an open source tool with 53.8K GitHub stars and 15.5K GitHub forks. Here's a link to Docker's open source repository on GitHub.
Lyft, StackShare, and Shopify are some of the popular companies that use Docker, whereas OpenStack is used by PayPal, HubSpot, and Wikipedia. Docker has a broader approval, being mentioned in 3471 company stacks & 3322 developers stacks; compared to OpenStack, which is listed in 66 company stacks and 50 developer stacks.
lxd/lxc and Docker aren't congruent so this comparison needs a more detailed look; but in short I can say: the lxd-integrated administration of storage including zfs with its snapshot capabilities as well as the system container (multi-process) approach of lxc vs. the limited single-process container approach of Docker is the main reason I chose lxd over Docker.
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Red Hat, Inc.
Docker is the new kid on the block disrupting virtualization nowadays. You're able to save up to 70% of your development cost on AWS (or any other cloud) switching to Docker. For example instead of paying for many small VMs you can spin up a large one with many Docker containers to drastically lower your cost. That alone is only one of the reasons why Docker is the future and it's not even the best feature: isolation, testability, reproducibility, standardization, security, and upgrading / downgrading / application versions to name a few. You can spin up 1000's of Docker containers on an ordinary Laptop, but you would have trouble spinning up 100's of VMs. If you haven't already checked out Docker you're missing out on a huge opportunity to join the movement that will change development/production environments forever
The support for macOS is a fake.
I can't work with docker in macOS because de network and comunications with the container don't works correctly.
Currently experimenting. The idea is to isolate any services where I'm not confident yet in their security/quality. The hope is that if there is an exploit in a given service that an attacker won't be able break out of the docker container and cause damage to my systems.
An example of a service I would isolate in a docker container would be a minecraft browser map application I use. I don't know who wrote it, I don't know who's vetting it, I don't know the source code. I would feel a lot better putting this in a container before I expose it to the internet.
I believe I will follow this process for anything that's not properly maintained (not in an trusted apt-repo or some other sort of confidence)
We are testing out docker at the moment, building images from successful staging builds for all our APIs. Since we operate in a SOA (not quite microservices), developers have a dockerfile that they can run to build the entirety of our api infrastructure on their machines. We use the successful builds from staging to power these instances allowing them to do some more manual integration testing across systems.
Each component of the app was launched in a separate container, so that they wouldn't have to share resources: the front end in one, the back end in another, a third for celery, a fourth for celery-beat, and a fifth for RabbitMQ. Actually, we ended up running four front-end containers and eight back-end, due to load constraints.
Linux containers are so much more lightweight than VMs which is quite important for my limited budget. However, Docker has much more support and tooling for it unlike LXC, hence why I use it. rkt is interesting, although I will probably stick with Docker due to being more widespread.
We are running primarily as a micro-services platform and Docker lets us iterate on these smaller units consistently from dev to staging to production. It is also integral to our continuous deployment system for rolling out or rolling back new features.
IaaS for our core private cloud, and with AWS, HP Helion, and Rackspace to burst to public clouds to create a multi-sourced hybrid cloud setup.
필자가 온갖 서버사이드 지식들을 삽질하고 익힐 수 있었던 가장 큰 이유. 현대 퍼블릭/프라이빗 클라우드 환경을 막론하고 가장 표준이 되는 클라우드 플랫폼이다.